| 1 | /* $NetBSD: x86emu.c,v 1.10 2014/08/04 21:41:44 joerg Exp $ */ |
| 2 | |
| 3 | /**************************************************************************** |
| 4 | * |
| 5 | * Realmode X86 Emulator Library |
| 6 | * |
| 7 | * Copyright (C) 1996-1999 SciTech Software, Inc. |
| 8 | * Copyright (C) David Mosberger-Tang |
| 9 | * Copyright (C) 1999 Egbert Eich |
| 10 | * Copyright (C) 2007 Joerg Sonnenberger |
| 11 | * |
| 12 | * ======================================================================== |
| 13 | * |
| 14 | * Permission to use, copy, modify, distribute, and sell this software and |
| 15 | * its documentation for any purpose is hereby granted without fee, |
| 16 | * provided that the above copyright notice appear in all copies and that |
| 17 | * both that copyright notice and this permission notice appear in |
| 18 | * supporting documentation, and that the name of the authors not be used |
| 19 | * in advertising or publicity pertaining to distribution of the software |
| 20 | * without specific, written prior permission. The authors makes no |
| 21 | * representations about the suitability of this software for any purpose. |
| 22 | * It is provided "as is" without express or implied warranty. |
| 23 | * |
| 24 | * THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
| 25 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO |
| 26 | * EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
| 27 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF |
| 28 | * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR |
| 29 | * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 30 | * PERFORMANCE OF THIS SOFTWARE. |
| 31 | * |
| 32 | ****************************************************************************/ |
| 33 | |
| 34 | #ifndef _KERNEL |
| 35 | #include <stdbool.h> |
| 36 | #endif |
| 37 | |
| 38 | #include <x86emu/x86emu.h> |
| 39 | #include <x86emu/x86emu_regs.h> |
| 40 | |
| 41 | static void x86emu_intr_raise (struct X86EMU *, uint8_t type); |
| 42 | |
| 43 | static void X86EMU_exec_one_byte(struct X86EMU *); |
| 44 | static void X86EMU_exec_two_byte(struct X86EMU *); |
| 45 | |
| 46 | static void fetch_decode_modrm (struct X86EMU *); |
| 47 | static uint8_t fetch_byte_imm (struct X86EMU *); |
| 48 | static uint16_t fetch_word_imm (struct X86EMU *); |
| 49 | static uint32_t fetch_long_imm (struct X86EMU *); |
| 50 | static uint8_t fetch_data_byte (struct X86EMU *, uint32_t offset); |
| 51 | static uint8_t fetch_byte (struct X86EMU *, uint segment, uint32_t offset); |
| 52 | static uint16_t fetch_data_word (struct X86EMU *, uint32_t offset); |
| 53 | static uint16_t fetch_word (struct X86EMU *, uint32_t segment, uint32_t offset); |
| 54 | static uint32_t fetch_data_long (struct X86EMU *, uint32_t offset); |
| 55 | static uint32_t fetch_long (struct X86EMU *, uint32_t segment, uint32_t offset); |
| 56 | static void store_data_byte (struct X86EMU *, uint32_t offset, uint8_t val); |
| 57 | static void store_byte (struct X86EMU *, uint32_t segment, uint32_t offset, uint8_t val); |
| 58 | static void store_data_word (struct X86EMU *, uint32_t offset, uint16_t val); |
| 59 | static void store_word (struct X86EMU *, uint32_t segment, uint32_t offset, uint16_t val); |
| 60 | static void store_data_long (struct X86EMU *, uint32_t offset, uint32_t val); |
| 61 | static void store_long (struct X86EMU *, uint32_t segment, uint32_t offset, uint32_t val); |
| 62 | static uint8_t* decode_rl_byte_register(struct X86EMU *); |
| 63 | static uint16_t* decode_rl_word_register(struct X86EMU *); |
| 64 | static uint32_t* decode_rl_long_register(struct X86EMU *); |
| 65 | static uint8_t* decode_rh_byte_register(struct X86EMU *); |
| 66 | static uint16_t* decode_rh_word_register(struct X86EMU *); |
| 67 | static uint32_t* decode_rh_long_register(struct X86EMU *); |
| 68 | static uint16_t* decode_rh_seg_register(struct X86EMU *); |
| 69 | static uint32_t decode_rl_address(struct X86EMU *); |
| 70 | |
| 71 | static uint8_t decode_and_fetch_byte(struct X86EMU *); |
| 72 | static uint16_t decode_and_fetch_word(struct X86EMU *); |
| 73 | static uint32_t decode_and_fetch_long(struct X86EMU *); |
| 74 | |
| 75 | static uint8_t decode_and_fetch_byte_imm8(struct X86EMU *, uint8_t *); |
| 76 | static uint16_t decode_and_fetch_word_imm8(struct X86EMU *, uint8_t *); |
| 77 | static uint32_t decode_and_fetch_long_imm8(struct X86EMU *, uint8_t *); |
| 78 | |
| 79 | static uint16_t decode_and_fetch_word_disp(struct X86EMU *, int16_t); |
| 80 | static uint32_t decode_and_fetch_long_disp(struct X86EMU *, int16_t); |
| 81 | |
| 82 | static void write_back_byte(struct X86EMU *, uint8_t); |
| 83 | static void write_back_word(struct X86EMU *, uint16_t); |
| 84 | static void write_back_long(struct X86EMU *, uint32_t); |
| 85 | |
| 86 | static uint16_t aaa_word (struct X86EMU *, uint16_t d); |
| 87 | static uint16_t aas_word (struct X86EMU *, uint16_t d); |
| 88 | static uint16_t aad_word (struct X86EMU *, uint16_t d); |
| 89 | static uint16_t aam_word (struct X86EMU *, uint8_t d); |
| 90 | static uint8_t adc_byte (struct X86EMU *, uint8_t d, uint8_t s); |
| 91 | static uint16_t adc_word (struct X86EMU *, uint16_t d, uint16_t s); |
| 92 | static uint32_t adc_long (struct X86EMU *, uint32_t d, uint32_t s); |
| 93 | static uint8_t add_byte (struct X86EMU *, uint8_t d, uint8_t s); |
| 94 | static uint16_t add_word (struct X86EMU *, uint16_t d, uint16_t s); |
| 95 | static uint32_t add_long (struct X86EMU *, uint32_t d, uint32_t s); |
| 96 | static uint8_t and_byte (struct X86EMU *, uint8_t d, uint8_t s); |
| 97 | static uint16_t and_word (struct X86EMU *, uint16_t d, uint16_t s); |
| 98 | static uint32_t and_long (struct X86EMU *, uint32_t d, uint32_t s); |
| 99 | static uint8_t cmp_byte (struct X86EMU *, uint8_t d, uint8_t s); |
| 100 | static uint16_t cmp_word (struct X86EMU *, uint16_t d, uint16_t s); |
| 101 | static uint32_t cmp_long (struct X86EMU *, uint32_t d, uint32_t s); |
| 102 | static void cmp_byte_no_return (struct X86EMU *, uint8_t d, uint8_t s); |
| 103 | static void cmp_word_no_return (struct X86EMU *, uint16_t d, uint16_t s); |
| 104 | static void cmp_long_no_return (struct X86EMU *, uint32_t d, uint32_t s); |
| 105 | static uint8_t daa_byte (struct X86EMU *, uint8_t d); |
| 106 | static uint8_t das_byte (struct X86EMU *, uint8_t d); |
| 107 | static uint8_t dec_byte (struct X86EMU *, uint8_t d); |
| 108 | static uint16_t dec_word (struct X86EMU *, uint16_t d); |
| 109 | static uint32_t dec_long (struct X86EMU *, uint32_t d); |
| 110 | static uint8_t inc_byte (struct X86EMU *, uint8_t d); |
| 111 | static uint16_t inc_word (struct X86EMU *, uint16_t d); |
| 112 | static uint32_t inc_long (struct X86EMU *, uint32_t d); |
| 113 | static uint8_t or_byte (struct X86EMU *, uint8_t d, uint8_t s); |
| 114 | static uint16_t or_word (struct X86EMU *, uint16_t d, uint16_t s); |
| 115 | static uint32_t or_long (struct X86EMU *, uint32_t d, uint32_t s); |
| 116 | static uint8_t neg_byte (struct X86EMU *, uint8_t s); |
| 117 | static uint16_t neg_word (struct X86EMU *, uint16_t s); |
| 118 | static uint32_t neg_long (struct X86EMU *, uint32_t s); |
| 119 | static uint8_t rcl_byte (struct X86EMU *, uint8_t d, uint8_t s); |
| 120 | static uint16_t rcl_word (struct X86EMU *, uint16_t d, uint8_t s); |
| 121 | static uint32_t rcl_long (struct X86EMU *, uint32_t d, uint8_t s); |
| 122 | static uint8_t rcr_byte (struct X86EMU *, uint8_t d, uint8_t s); |
| 123 | static uint16_t rcr_word (struct X86EMU *, uint16_t d, uint8_t s); |
| 124 | static uint32_t rcr_long (struct X86EMU *, uint32_t d, uint8_t s); |
| 125 | static uint8_t rol_byte (struct X86EMU *, uint8_t d, uint8_t s); |
| 126 | static uint16_t rol_word (struct X86EMU *, uint16_t d, uint8_t s); |
| 127 | static uint32_t rol_long (struct X86EMU *, uint32_t d, uint8_t s); |
| 128 | static uint8_t ror_byte (struct X86EMU *, uint8_t d, uint8_t s); |
| 129 | static uint16_t ror_word (struct X86EMU *, uint16_t d, uint8_t s); |
| 130 | static uint32_t ror_long (struct X86EMU *, uint32_t d, uint8_t s); |
| 131 | static uint8_t shl_byte (struct X86EMU *, uint8_t d, uint8_t s); |
| 132 | static uint16_t shl_word (struct X86EMU *, uint16_t d, uint8_t s); |
| 133 | static uint32_t shl_long (struct X86EMU *, uint32_t d, uint8_t s); |
| 134 | static uint8_t shr_byte (struct X86EMU *, uint8_t d, uint8_t s); |
| 135 | static uint16_t shr_word (struct X86EMU *, uint16_t d, uint8_t s); |
| 136 | static uint32_t shr_long (struct X86EMU *, uint32_t d, uint8_t s); |
| 137 | static uint8_t sar_byte (struct X86EMU *, uint8_t d, uint8_t s); |
| 138 | static uint16_t sar_word (struct X86EMU *, uint16_t d, uint8_t s); |
| 139 | static uint32_t sar_long (struct X86EMU *, uint32_t d, uint8_t s); |
| 140 | static uint16_t shld_word (struct X86EMU *, uint16_t d, uint16_t fill, uint8_t s); |
| 141 | static uint32_t shld_long (struct X86EMU *, uint32_t d, uint32_t fill, uint8_t s); |
| 142 | static uint16_t shrd_word (struct X86EMU *, uint16_t d, uint16_t fill, uint8_t s); |
| 143 | static uint32_t shrd_long (struct X86EMU *, uint32_t d, uint32_t fill, uint8_t s); |
| 144 | static uint8_t sbb_byte (struct X86EMU *, uint8_t d, uint8_t s); |
| 145 | static uint16_t sbb_word (struct X86EMU *, uint16_t d, uint16_t s); |
| 146 | static uint32_t sbb_long (struct X86EMU *, uint32_t d, uint32_t s); |
| 147 | static uint8_t sub_byte (struct X86EMU *, uint8_t d, uint8_t s); |
| 148 | static uint16_t sub_word (struct X86EMU *, uint16_t d, uint16_t s); |
| 149 | static uint32_t sub_long (struct X86EMU *, uint32_t d, uint32_t s); |
| 150 | static void test_byte (struct X86EMU *, uint8_t d, uint8_t s); |
| 151 | static void test_word (struct X86EMU *, uint16_t d, uint16_t s); |
| 152 | static void test_long (struct X86EMU *, uint32_t d, uint32_t s); |
| 153 | static uint8_t xor_byte (struct X86EMU *, uint8_t d, uint8_t s); |
| 154 | static uint16_t xor_word (struct X86EMU *, uint16_t d, uint16_t s); |
| 155 | static uint32_t xor_long (struct X86EMU *, uint32_t d, uint32_t s); |
| 156 | static void imul_byte (struct X86EMU *, uint8_t s); |
| 157 | static void imul_word (struct X86EMU *, uint16_t s); |
| 158 | static void imul_long (struct X86EMU *, uint32_t s); |
| 159 | static void mul_byte (struct X86EMU *, uint8_t s); |
| 160 | static void mul_word (struct X86EMU *, uint16_t s); |
| 161 | static void mul_long (struct X86EMU *, uint32_t s); |
| 162 | static void idiv_byte (struct X86EMU *, uint8_t s); |
| 163 | static void idiv_word (struct X86EMU *, uint16_t s); |
| 164 | static void idiv_long (struct X86EMU *, uint32_t s); |
| 165 | static void div_byte (struct X86EMU *, uint8_t s); |
| 166 | static void div_word (struct X86EMU *, uint16_t s); |
| 167 | static void div_long (struct X86EMU *, uint32_t s); |
| 168 | static void ins (struct X86EMU *, int size); |
| 169 | static void outs (struct X86EMU *, int size); |
| 170 | static void push_word (struct X86EMU *, uint16_t w); |
| 171 | static void push_long (struct X86EMU *, uint32_t w); |
| 172 | static uint16_t pop_word (struct X86EMU *); |
| 173 | static uint32_t pop_long (struct X86EMU *); |
| 174 | |
| 175 | /**************************************************************************** |
| 176 | REMARKS: |
| 177 | Handles any pending asychronous interrupts. |
| 178 | ****************************************************************************/ |
| 179 | static void |
| 180 | x86emu_intr_dispatch(struct X86EMU *emu, uint8_t intno) |
| 181 | { |
| 182 | if (emu->_X86EMU_intrTab[intno]) { |
| 183 | (*emu->_X86EMU_intrTab[intno]) (emu, intno); |
| 184 | } else { |
| 185 | push_word(emu, (uint16_t) emu->x86.R_FLG); |
| 186 | CLEAR_FLAG(F_IF); |
| 187 | CLEAR_FLAG(F_TF); |
| 188 | push_word(emu, emu->x86.R_CS); |
| 189 | emu->x86.R_CS = fetch_word(emu, 0, intno * 4 + 2); |
| 190 | push_word(emu, emu->x86.R_IP); |
| 191 | emu->x86.R_IP = fetch_word(emu, 0, intno * 4); |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | static void |
| 196 | x86emu_intr_handle(struct X86EMU *emu) |
| 197 | { |
| 198 | uint8_t intno; |
| 199 | |
| 200 | if (emu->x86.intr & INTR_SYNCH) { |
| 201 | intno = emu->x86.intno; |
| 202 | emu->x86.intr = 0; |
| 203 | x86emu_intr_dispatch(emu, intno); |
| 204 | } |
| 205 | } |
| 206 | /**************************************************************************** |
| 207 | PARAMETERS: |
| 208 | intrnum - Interrupt number to raise |
| 209 | |
| 210 | REMARKS: |
| 211 | Raise the specified interrupt to be handled before the execution of the |
| 212 | next instruction. |
| 213 | ****************************************************************************/ |
| 214 | void |
| 215 | x86emu_intr_raise(struct X86EMU *emu, uint8_t intrnum) |
| 216 | { |
| 217 | emu->x86.intno = intrnum; |
| 218 | emu->x86.intr |= INTR_SYNCH; |
| 219 | } |
| 220 | /**************************************************************************** |
| 221 | REMARKS: |
| 222 | Main execution loop for the emulator. We return from here when the system |
| 223 | halts, which is normally caused by a stack fault when we return from the |
| 224 | original real mode call. |
| 225 | ****************************************************************************/ |
| 226 | void |
| 227 | X86EMU_exec(struct X86EMU *emu) |
| 228 | { |
| 229 | emu->x86.intr = 0; |
| 230 | |
| 231 | #ifdef _KERNEL |
| 232 | if (setjmp(&emu->exec_state)) |
| 233 | return; |
| 234 | #else |
| 235 | if (setjmp(emu->exec_state)) |
| 236 | return; |
| 237 | #endif |
| 238 | |
| 239 | for (;;) { |
| 240 | if (emu->x86.intr) { |
| 241 | if (((emu->x86.intr & INTR_SYNCH) && (emu->x86.intno == 0 || emu->x86.intno == 2)) || |
| 242 | !ACCESS_FLAG(F_IF)) { |
| 243 | x86emu_intr_handle(emu); |
| 244 | } |
| 245 | } |
| 246 | if (emu->x86.R_CS == 0 && emu->x86.R_IP == 0) |
| 247 | return; |
| 248 | X86EMU_exec_one_byte(emu); |
| 249 | ++emu->cur_cycles; |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | void |
| 254 | X86EMU_exec_call(struct X86EMU *emu, uint16_t seg, uint16_t off) |
| 255 | { |
| 256 | push_word(emu, 0); |
| 257 | push_word(emu, 0); |
| 258 | emu->x86.R_CS = seg; |
| 259 | emu->x86.R_IP = off; |
| 260 | |
| 261 | X86EMU_exec(emu); |
| 262 | } |
| 263 | |
| 264 | void |
| 265 | X86EMU_exec_intr(struct X86EMU *emu, uint8_t intr) |
| 266 | { |
| 267 | push_word(emu, emu->x86.R_FLG); |
| 268 | CLEAR_FLAG(F_IF); |
| 269 | CLEAR_FLAG(F_TF); |
| 270 | push_word(emu, 0); |
| 271 | push_word(emu, 0); |
| 272 | emu->x86.R_CS = (*emu->emu_rdw)(emu, intr * 4 + 2); |
| 273 | emu->x86.R_IP = (*emu->emu_rdw)(emu, intr * 4); |
| 274 | emu->x86.intr = 0; |
| 275 | |
| 276 | X86EMU_exec(emu); |
| 277 | } |
| 278 | /**************************************************************************** |
| 279 | REMARKS: |
| 280 | Halts the system by setting the halted system flag. |
| 281 | ****************************************************************************/ |
| 282 | void |
| 283 | X86EMU_halt_sys(struct X86EMU *emu) |
| 284 | { |
| 285 | #ifdef _KERNEL |
| 286 | longjmp(&emu->exec_state); |
| 287 | #else |
| 288 | longjmp(emu->exec_state, 1); |
| 289 | #endif |
| 290 | } |
| 291 | /**************************************************************************** |
| 292 | PARAMETERS: |
| 293 | mod - Mod value from decoded byte |
| 294 | regh - Reg h value from decoded byte |
| 295 | regl - Reg l value from decoded byte |
| 296 | |
| 297 | REMARKS: |
| 298 | Raise the specified interrupt to be handled before the execution of the |
| 299 | next instruction. |
| 300 | |
| 301 | NOTE: Do not inline this function, as (*emu->emu_rdb) is already inline! |
| 302 | ****************************************************************************/ |
| 303 | static void |
| 304 | fetch_decode_modrm(struct X86EMU *emu) |
| 305 | { |
| 306 | int fetched; |
| 307 | |
| 308 | fetched = fetch_byte_imm(emu); |
| 309 | emu->cur_mod = (fetched >> 6) & 0x03; |
| 310 | emu->cur_rh = (fetched >> 3) & 0x07; |
| 311 | emu->cur_rl = (fetched >> 0) & 0x07; |
| 312 | } |
| 313 | /**************************************************************************** |
| 314 | RETURNS: |
| 315 | Immediate byte value read from instruction queue |
| 316 | |
| 317 | REMARKS: |
| 318 | This function returns the immediate byte from the instruction queue, and |
| 319 | moves the instruction pointer to the next value. |
| 320 | |
| 321 | NOTE: Do not inline this function, as (*emu->emu_rdb) is already inline! |
| 322 | ****************************************************************************/ |
| 323 | static uint8_t |
| 324 | fetch_byte_imm(struct X86EMU *emu) |
| 325 | { |
| 326 | uint8_t fetched; |
| 327 | |
| 328 | fetched = fetch_byte(emu, emu->x86.R_CS, emu->x86.R_IP); |
| 329 | emu->x86.R_IP++; |
| 330 | return fetched; |
| 331 | } |
| 332 | /**************************************************************************** |
| 333 | RETURNS: |
| 334 | Immediate word value read from instruction queue |
| 335 | |
| 336 | REMARKS: |
| 337 | This function returns the immediate byte from the instruction queue, and |
| 338 | moves the instruction pointer to the next value. |
| 339 | |
| 340 | NOTE: Do not inline this function, as (*emu->emu_rdw) is already inline! |
| 341 | ****************************************************************************/ |
| 342 | static uint16_t |
| 343 | fetch_word_imm(struct X86EMU *emu) |
| 344 | { |
| 345 | uint16_t fetched; |
| 346 | |
| 347 | fetched = fetch_word(emu, emu->x86.R_CS, emu->x86.R_IP); |
| 348 | emu->x86.R_IP += 2; |
| 349 | return fetched; |
| 350 | } |
| 351 | /**************************************************************************** |
| 352 | RETURNS: |
| 353 | Immediate lone value read from instruction queue |
| 354 | |
| 355 | REMARKS: |
| 356 | This function returns the immediate byte from the instruction queue, and |
| 357 | moves the instruction pointer to the next value. |
| 358 | |
| 359 | NOTE: Do not inline this function, as (*emu->emu_rdw) is already inline! |
| 360 | ****************************************************************************/ |
| 361 | static uint32_t |
| 362 | fetch_long_imm(struct X86EMU *emu) |
| 363 | { |
| 364 | uint32_t fetched; |
| 365 | |
| 366 | fetched = fetch_long(emu, emu->x86.R_CS, emu->x86.R_IP); |
| 367 | emu->x86.R_IP += 4; |
| 368 | return fetched; |
| 369 | } |
| 370 | /**************************************************************************** |
| 371 | RETURNS: |
| 372 | Value of the default data segment |
| 373 | |
| 374 | REMARKS: |
| 375 | Inline function that returns the default data segment for the current |
| 376 | instruction. |
| 377 | |
| 378 | On the x86 processor, the default segment is not always DS if there is |
| 379 | no segment override. Address modes such as -3[BP] or 10[BP+SI] all refer to |
| 380 | addresses relative to SS (ie: on the stack). So, at the minimum, all |
| 381 | decodings of addressing modes would have to set/clear a bit describing |
| 382 | whether the access is relative to DS or SS. That is the function of the |
| 383 | cpu-state-varible emu->x86.mode. There are several potential states: |
| 384 | |
| 385 | repe prefix seen (handled elsewhere) |
| 386 | repne prefix seen (ditto) |
| 387 | |
| 388 | cs segment override |
| 389 | ds segment override |
| 390 | es segment override |
| 391 | fs segment override |
| 392 | gs segment override |
| 393 | ss segment override |
| 394 | |
| 395 | ds/ss select (in absense of override) |
| 396 | |
| 397 | Each of the above 7 items are handled with a bit in the mode field. |
| 398 | ****************************************************************************/ |
| 399 | static uint32_t |
| 400 | get_data_segment(struct X86EMU *emu) |
| 401 | { |
| 402 | switch (emu->x86.mode & SYSMODE_SEGMASK) { |
| 403 | case 0: /* default case: use ds register */ |
| 404 | case SYSMODE_SEGOVR_DS: |
| 405 | case SYSMODE_SEGOVR_DS | SYSMODE_SEG_DS_SS: |
| 406 | return emu->x86.R_DS; |
| 407 | case SYSMODE_SEG_DS_SS:/* non-overridden, use ss register */ |
| 408 | return emu->x86.R_SS; |
| 409 | case SYSMODE_SEGOVR_CS: |
| 410 | case SYSMODE_SEGOVR_CS | SYSMODE_SEG_DS_SS: |
| 411 | return emu->x86.R_CS; |
| 412 | case SYSMODE_SEGOVR_ES: |
| 413 | case SYSMODE_SEGOVR_ES | SYSMODE_SEG_DS_SS: |
| 414 | return emu->x86.R_ES; |
| 415 | case SYSMODE_SEGOVR_FS: |
| 416 | case SYSMODE_SEGOVR_FS | SYSMODE_SEG_DS_SS: |
| 417 | return emu->x86.R_FS; |
| 418 | case SYSMODE_SEGOVR_GS: |
| 419 | case SYSMODE_SEGOVR_GS | SYSMODE_SEG_DS_SS: |
| 420 | return emu->x86.R_GS; |
| 421 | case SYSMODE_SEGOVR_SS: |
| 422 | case SYSMODE_SEGOVR_SS | SYSMODE_SEG_DS_SS: |
| 423 | return emu->x86.R_SS; |
| 424 | } |
| 425 | X86EMU_halt_sys(emu); |
| 426 | } |
| 427 | /**************************************************************************** |
| 428 | PARAMETERS: |
| 429 | offset - Offset to load data from |
| 430 | |
| 431 | RETURNS: |
| 432 | Byte value read from the absolute memory location. |
| 433 | |
| 434 | NOTE: Do not inline this function as (*emu->emu_rdX) is already inline! |
| 435 | ****************************************************************************/ |
| 436 | static uint8_t |
| 437 | fetch_data_byte(struct X86EMU *emu, uint32_t offset) |
| 438 | { |
| 439 | return fetch_byte(emu, get_data_segment(emu), offset); |
| 440 | } |
| 441 | /**************************************************************************** |
| 442 | PARAMETERS: |
| 443 | offset - Offset to load data from |
| 444 | |
| 445 | RETURNS: |
| 446 | Word value read from the absolute memory location. |
| 447 | |
| 448 | NOTE: Do not inline this function as (*emu->emu_rdX) is already inline! |
| 449 | ****************************************************************************/ |
| 450 | static uint16_t |
| 451 | fetch_data_word(struct X86EMU *emu, uint32_t offset) |
| 452 | { |
| 453 | return fetch_word(emu, get_data_segment(emu), offset); |
| 454 | } |
| 455 | /**************************************************************************** |
| 456 | PARAMETERS: |
| 457 | offset - Offset to load data from |
| 458 | |
| 459 | RETURNS: |
| 460 | Long value read from the absolute memory location. |
| 461 | |
| 462 | NOTE: Do not inline this function as (*emu->emu_rdX) is already inline! |
| 463 | ****************************************************************************/ |
| 464 | static uint32_t |
| 465 | fetch_data_long(struct X86EMU *emu, uint32_t offset) |
| 466 | { |
| 467 | return fetch_long(emu, get_data_segment(emu), offset); |
| 468 | } |
| 469 | /**************************************************************************** |
| 470 | PARAMETERS: |
| 471 | segment - Segment to load data from |
| 472 | offset - Offset to load data from |
| 473 | |
| 474 | RETURNS: |
| 475 | Byte value read from the absolute memory location. |
| 476 | |
| 477 | NOTE: Do not inline this function as (*emu->emu_rdX) is already inline! |
| 478 | ****************************************************************************/ |
| 479 | static uint8_t |
| 480 | fetch_byte(struct X86EMU *emu, uint32_t segment, uint32_t offset) |
| 481 | { |
| 482 | return (*emu->emu_rdb) (emu, ((uint32_t) segment << 4) + offset); |
| 483 | } |
| 484 | /**************************************************************************** |
| 485 | PARAMETERS: |
| 486 | segment - Segment to load data from |
| 487 | offset - Offset to load data from |
| 488 | |
| 489 | RETURNS: |
| 490 | Word value read from the absolute memory location. |
| 491 | |
| 492 | NOTE: Do not inline this function as (*emu->emu_rdX) is already inline! |
| 493 | ****************************************************************************/ |
| 494 | static uint16_t |
| 495 | fetch_word(struct X86EMU *emu, uint32_t segment, uint32_t offset) |
| 496 | { |
| 497 | return (*emu->emu_rdw) (emu, ((uint32_t) segment << 4) + offset); |
| 498 | } |
| 499 | /**************************************************************************** |
| 500 | PARAMETERS: |
| 501 | segment - Segment to load data from |
| 502 | offset - Offset to load data from |
| 503 | |
| 504 | RETURNS: |
| 505 | Long value read from the absolute memory location. |
| 506 | |
| 507 | NOTE: Do not inline this function as (*emu->emu_rdX) is already inline! |
| 508 | ****************************************************************************/ |
| 509 | static uint32_t |
| 510 | fetch_long(struct X86EMU *emu, uint32_t segment, uint32_t offset) |
| 511 | { |
| 512 | return (*emu->emu_rdl) (emu, ((uint32_t) segment << 4) + offset); |
| 513 | } |
| 514 | /**************************************************************************** |
| 515 | PARAMETERS: |
| 516 | offset - Offset to store data at |
| 517 | val - Value to store |
| 518 | |
| 519 | REMARKS: |
| 520 | Writes a word value to an segmented memory location. The segment used is |
| 521 | the current 'default' segment, which may have been overridden. |
| 522 | |
| 523 | NOTE: Do not inline this function as (*emu->emu_wrX) is already inline! |
| 524 | ****************************************************************************/ |
| 525 | static void |
| 526 | store_data_byte(struct X86EMU *emu, uint32_t offset, uint8_t val) |
| 527 | { |
| 528 | store_byte(emu, get_data_segment(emu), offset, val); |
| 529 | } |
| 530 | /**************************************************************************** |
| 531 | PARAMETERS: |
| 532 | offset - Offset to store data at |
| 533 | val - Value to store |
| 534 | |
| 535 | REMARKS: |
| 536 | Writes a word value to an segmented memory location. The segment used is |
| 537 | the current 'default' segment, which may have been overridden. |
| 538 | |
| 539 | NOTE: Do not inline this function as (*emu->emu_wrX) is already inline! |
| 540 | ****************************************************************************/ |
| 541 | static void |
| 542 | store_data_word(struct X86EMU *emu, uint32_t offset, uint16_t val) |
| 543 | { |
| 544 | store_word(emu, get_data_segment(emu), offset, val); |
| 545 | } |
| 546 | /**************************************************************************** |
| 547 | PARAMETERS: |
| 548 | offset - Offset to store data at |
| 549 | val - Value to store |
| 550 | |
| 551 | REMARKS: |
| 552 | Writes a long value to an segmented memory location. The segment used is |
| 553 | the current 'default' segment, which may have been overridden. |
| 554 | |
| 555 | NOTE: Do not inline this function as (*emu->emu_wrX) is already inline! |
| 556 | ****************************************************************************/ |
| 557 | static void |
| 558 | store_data_long(struct X86EMU *emu, uint32_t offset, uint32_t val) |
| 559 | { |
| 560 | store_long(emu, get_data_segment(emu), offset, val); |
| 561 | } |
| 562 | /**************************************************************************** |
| 563 | PARAMETERS: |
| 564 | segment - Segment to store data at |
| 565 | offset - Offset to store data at |
| 566 | val - Value to store |
| 567 | |
| 568 | REMARKS: |
| 569 | Writes a byte value to an absolute memory location. |
| 570 | |
| 571 | NOTE: Do not inline this function as (*emu->emu_wrX) is already inline! |
| 572 | ****************************************************************************/ |
| 573 | static void |
| 574 | store_byte(struct X86EMU *emu, uint32_t segment, uint32_t offset, uint8_t val) |
| 575 | { |
| 576 | (*emu->emu_wrb) (emu, ((uint32_t) segment << 4) + offset, val); |
| 577 | } |
| 578 | /**************************************************************************** |
| 579 | PARAMETERS: |
| 580 | segment - Segment to store data at |
| 581 | offset - Offset to store data at |
| 582 | val - Value to store |
| 583 | |
| 584 | REMARKS: |
| 585 | Writes a word value to an absolute memory location. |
| 586 | |
| 587 | NOTE: Do not inline this function as (*emu->emu_wrX) is already inline! |
| 588 | ****************************************************************************/ |
| 589 | static void |
| 590 | store_word(struct X86EMU *emu, uint32_t segment, uint32_t offset, uint16_t val) |
| 591 | { |
| 592 | (*emu->emu_wrw) (emu, ((uint32_t) segment << 4) + offset, val); |
| 593 | } |
| 594 | /**************************************************************************** |
| 595 | PARAMETERS: |
| 596 | segment - Segment to store data at |
| 597 | offset - Offset to store data at |
| 598 | val - Value to store |
| 599 | |
| 600 | REMARKS: |
| 601 | Writes a long value to an absolute memory location. |
| 602 | |
| 603 | NOTE: Do not inline this function as (*emu->emu_wrX) is already inline! |
| 604 | ****************************************************************************/ |
| 605 | static void |
| 606 | store_long(struct X86EMU *emu, uint32_t segment, uint32_t offset, uint32_t val) |
| 607 | { |
| 608 | (*emu->emu_wrl) (emu, ((uint32_t) segment << 4) + offset, val); |
| 609 | } |
| 610 | /**************************************************************************** |
| 611 | PARAMETERS: |
| 612 | reg - Register to decode |
| 613 | |
| 614 | RETURNS: |
| 615 | Pointer to the appropriate register |
| 616 | |
| 617 | REMARKS: |
| 618 | Return a pointer to the register given by the R/RM field of the |
| 619 | modrm byte, for byte operands. Also enables the decoding of instructions. |
| 620 | ****************************************************************************/ |
| 621 | static uint8_t * |
| 622 | decode_rm_byte_register(struct X86EMU *emu, int reg) |
| 623 | { |
| 624 | switch (reg) { |
| 625 | case 0: |
| 626 | return &emu->x86.R_AL; |
| 627 | case 1: |
| 628 | return &emu->x86.R_CL; |
| 629 | case 2: |
| 630 | return &emu->x86.R_DL; |
| 631 | case 3: |
| 632 | return &emu->x86.R_BL; |
| 633 | case 4: |
| 634 | return &emu->x86.R_AH; |
| 635 | case 5: |
| 636 | return &emu->x86.R_CH; |
| 637 | case 6: |
| 638 | return &emu->x86.R_DH; |
| 639 | case 7: |
| 640 | return &emu->x86.R_BH; |
| 641 | default: |
| 642 | X86EMU_halt_sys(emu); |
| 643 | } |
| 644 | } |
| 645 | |
| 646 | static uint8_t * |
| 647 | decode_rl_byte_register(struct X86EMU *emu) |
| 648 | { |
| 649 | return decode_rm_byte_register(emu, emu->cur_rl); |
| 650 | } |
| 651 | |
| 652 | static uint8_t * |
| 653 | decode_rh_byte_register(struct X86EMU *emu) |
| 654 | { |
| 655 | return decode_rm_byte_register(emu, emu->cur_rh); |
| 656 | } |
| 657 | /**************************************************************************** |
| 658 | PARAMETERS: |
| 659 | reg - Register to decode |
| 660 | |
| 661 | RETURNS: |
| 662 | Pointer to the appropriate register |
| 663 | |
| 664 | REMARKS: |
| 665 | Return a pointer to the register given by the R/RM field of the |
| 666 | modrm byte, for word operands. Also enables the decoding of instructions. |
| 667 | ****************************************************************************/ |
| 668 | static uint16_t * |
| 669 | decode_rm_word_register(struct X86EMU *emu, int reg) |
| 670 | { |
| 671 | switch (reg) { |
| 672 | case 0: |
| 673 | return &emu->x86.R_AX; |
| 674 | case 1: |
| 675 | return &emu->x86.R_CX; |
| 676 | case 2: |
| 677 | return &emu->x86.R_DX; |
| 678 | case 3: |
| 679 | return &emu->x86.R_BX; |
| 680 | case 4: |
| 681 | return &emu->x86.R_SP; |
| 682 | case 5: |
| 683 | return &emu->x86.R_BP; |
| 684 | case 6: |
| 685 | return &emu->x86.R_SI; |
| 686 | case 7: |
| 687 | return &emu->x86.R_DI; |
| 688 | default: |
| 689 | X86EMU_halt_sys(emu); |
| 690 | } |
| 691 | } |
| 692 | |
| 693 | static uint16_t * |
| 694 | decode_rl_word_register(struct X86EMU *emu) |
| 695 | { |
| 696 | return decode_rm_word_register(emu, emu->cur_rl); |
| 697 | } |
| 698 | |
| 699 | static uint16_t * |
| 700 | decode_rh_word_register(struct X86EMU *emu) |
| 701 | { |
| 702 | return decode_rm_word_register(emu, emu->cur_rh); |
| 703 | } |
| 704 | /**************************************************************************** |
| 705 | PARAMETERS: |
| 706 | reg - Register to decode |
| 707 | |
| 708 | RETURNS: |
| 709 | Pointer to the appropriate register |
| 710 | |
| 711 | REMARKS: |
| 712 | Return a pointer to the register given by the R/RM field of the |
| 713 | modrm byte, for dword operands. Also enables the decoding of instructions. |
| 714 | ****************************************************************************/ |
| 715 | static uint32_t * |
| 716 | decode_rm_long_register(struct X86EMU *emu, int reg) |
| 717 | { |
| 718 | switch (reg) { |
| 719 | case 0: |
| 720 | return &emu->x86.R_EAX; |
| 721 | case 1: |
| 722 | return &emu->x86.R_ECX; |
| 723 | case 2: |
| 724 | return &emu->x86.R_EDX; |
| 725 | case 3: |
| 726 | return &emu->x86.R_EBX; |
| 727 | case 4: |
| 728 | return &emu->x86.R_ESP; |
| 729 | case 5: |
| 730 | return &emu->x86.R_EBP; |
| 731 | case 6: |
| 732 | return &emu->x86.R_ESI; |
| 733 | case 7: |
| 734 | return &emu->x86.R_EDI; |
| 735 | default: |
| 736 | X86EMU_halt_sys(emu); |
| 737 | } |
| 738 | } |
| 739 | |
| 740 | static uint32_t * |
| 741 | decode_rl_long_register(struct X86EMU *emu) |
| 742 | { |
| 743 | return decode_rm_long_register(emu, emu->cur_rl); |
| 744 | } |
| 745 | |
| 746 | static uint32_t * |
| 747 | decode_rh_long_register(struct X86EMU *emu) |
| 748 | { |
| 749 | return decode_rm_long_register(emu, emu->cur_rh); |
| 750 | } |
| 751 | |
| 752 | /**************************************************************************** |
| 753 | PARAMETERS: |
| 754 | reg - Register to decode |
| 755 | |
| 756 | RETURNS: |
| 757 | Pointer to the appropriate register |
| 758 | |
| 759 | REMARKS: |
| 760 | Return a pointer to the register given by the R/RM field of the |
| 761 | modrm byte, for word operands, modified from above for the weirdo |
| 762 | special case of segreg operands. Also enables the decoding of instructions. |
| 763 | ****************************************************************************/ |
| 764 | static uint16_t * |
| 765 | decode_rh_seg_register(struct X86EMU *emu) |
| 766 | { |
| 767 | switch (emu->cur_rh) { |
| 768 | case 0: |
| 769 | return &emu->x86.R_ES; |
| 770 | case 1: |
| 771 | return &emu->x86.R_CS; |
| 772 | case 2: |
| 773 | return &emu->x86.R_SS; |
| 774 | case 3: |
| 775 | return &emu->x86.R_DS; |
| 776 | case 4: |
| 777 | return &emu->x86.R_FS; |
| 778 | case 5: |
| 779 | return &emu->x86.R_GS; |
| 780 | default: |
| 781 | X86EMU_halt_sys(emu); |
| 782 | } |
| 783 | } |
| 784 | /* |
| 785 | * |
| 786 | * return offset from the SIB Byte |
| 787 | */ |
| 788 | static uint32_t |
| 789 | decode_sib_address(struct X86EMU *emu, int sib, int mod) |
| 790 | { |
| 791 | uint32_t base = 0, i = 0, scale = 1; |
| 792 | |
| 793 | switch (sib & 0x07) { |
| 794 | case 0: |
| 795 | base = emu->x86.R_EAX; |
| 796 | break; |
| 797 | case 1: |
| 798 | base = emu->x86.R_ECX; |
| 799 | break; |
| 800 | case 2: |
| 801 | base = emu->x86.R_EDX; |
| 802 | break; |
| 803 | case 3: |
| 804 | base = emu->x86.R_EBX; |
| 805 | break; |
| 806 | case 4: |
| 807 | base = emu->x86.R_ESP; |
| 808 | emu->x86.mode |= SYSMODE_SEG_DS_SS; |
| 809 | break; |
| 810 | case 5: |
| 811 | if (mod == 0) { |
| 812 | base = fetch_long_imm(emu); |
| 813 | } else { |
| 814 | base = emu->x86.R_EBP; |
| 815 | emu->x86.mode |= SYSMODE_SEG_DS_SS; |
| 816 | } |
| 817 | break; |
| 818 | case 6: |
| 819 | base = emu->x86.R_ESI; |
| 820 | break; |
| 821 | case 7: |
| 822 | base = emu->x86.R_EDI; |
| 823 | break; |
| 824 | } |
| 825 | switch ((sib >> 3) & 0x07) { |
| 826 | case 0: |
| 827 | i = emu->x86.R_EAX; |
| 828 | break; |
| 829 | case 1: |
| 830 | i = emu->x86.R_ECX; |
| 831 | break; |
| 832 | case 2: |
| 833 | i = emu->x86.R_EDX; |
| 834 | break; |
| 835 | case 3: |
| 836 | i = emu->x86.R_EBX; |
| 837 | break; |
| 838 | case 4: |
| 839 | i = 0; |
| 840 | break; |
| 841 | case 5: |
| 842 | i = emu->x86.R_EBP; |
| 843 | break; |
| 844 | case 6: |
| 845 | i = emu->x86.R_ESI; |
| 846 | break; |
| 847 | case 7: |
| 848 | i = emu->x86.R_EDI; |
| 849 | break; |
| 850 | } |
| 851 | scale = 1 << ((sib >> 6) & 0x03); |
| 852 | return base + (i * scale); |
| 853 | } |
| 854 | /**************************************************************************** |
| 855 | PARAMETERS: |
| 856 | rm - RM value to decode |
| 857 | |
| 858 | RETURNS: |
| 859 | Offset in memory for the address decoding |
| 860 | |
| 861 | REMARKS: |
| 862 | Return the offset given by mod=00, mod=01 or mod=10 addressing. |
| 863 | Also enables the decoding of instructions. |
| 864 | ****************************************************************************/ |
| 865 | static uint32_t |
| 866 | decode_rl_address(struct X86EMU *emu) |
| 867 | { |
| 868 | if (emu->x86.mode & SYSMODE_PREFIX_ADDR) { |
| 869 | uint32_t offset, sib; |
| 870 | /* 32-bit addressing */ |
| 871 | switch (emu->cur_rl) { |
| 872 | case 0: |
| 873 | offset = emu->x86.R_EAX; |
| 874 | break; |
| 875 | case 1: |
| 876 | offset = emu->x86.R_ECX; |
| 877 | break; |
| 878 | case 2: |
| 879 | offset = emu->x86.R_EDX; |
| 880 | break; |
| 881 | case 3: |
| 882 | offset = emu->x86.R_EBX; |
| 883 | break; |
| 884 | case 4: |
| 885 | sib = fetch_byte_imm(emu); |
| 886 | offset = decode_sib_address(emu, sib, 0); |
| 887 | break; |
| 888 | case 5: |
| 889 | if (emu->cur_mod == 0) { |
| 890 | offset = fetch_long_imm(emu); |
| 891 | } else { |
| 892 | emu->x86.mode |= SYSMODE_SEG_DS_SS; |
| 893 | offset = emu->x86.R_EBP; |
| 894 | } |
| 895 | break; |
| 896 | case 6: |
| 897 | offset = emu->x86.R_ESI; |
| 898 | break; |
| 899 | case 7: |
| 900 | offset = emu->x86.R_EDI; |
| 901 | break; |
| 902 | default: |
| 903 | X86EMU_halt_sys(emu); |
| 904 | } |
| 905 | if (emu->cur_mod == 1) |
| 906 | offset += (int8_t)fetch_byte_imm(emu); |
| 907 | else if (emu->cur_mod == 2) |
| 908 | offset += fetch_long_imm(emu); |
| 909 | return offset; |
| 910 | } else { |
| 911 | uint16_t offset; |
| 912 | |
| 913 | /* 16-bit addressing */ |
| 914 | switch (emu->cur_rl) { |
| 915 | case 0: |
| 916 | offset = emu->x86.R_BX + emu->x86.R_SI; |
| 917 | break; |
| 918 | case 1: |
| 919 | offset = emu->x86.R_BX + emu->x86.R_DI; |
| 920 | break; |
| 921 | case 2: |
| 922 | emu->x86.mode |= SYSMODE_SEG_DS_SS; |
| 923 | offset = emu->x86.R_BP + emu->x86.R_SI; |
| 924 | break; |
| 925 | case 3: |
| 926 | emu->x86.mode |= SYSMODE_SEG_DS_SS; |
| 927 | offset = emu->x86.R_BP + emu->x86.R_DI; |
| 928 | break; |
| 929 | case 4: |
| 930 | offset = emu->x86.R_SI; |
| 931 | break; |
| 932 | case 5: |
| 933 | offset = emu->x86.R_DI; |
| 934 | break; |
| 935 | case 6: |
| 936 | if (emu->cur_mod == 0) { |
| 937 | offset = fetch_word_imm(emu); |
| 938 | } else { |
| 939 | emu->x86.mode |= SYSMODE_SEG_DS_SS; |
| 940 | offset = emu->x86.R_BP; |
| 941 | } |
| 942 | break; |
| 943 | case 7: |
| 944 | offset = emu->x86.R_BX; |
| 945 | break; |
| 946 | default: |
| 947 | X86EMU_halt_sys(emu); |
| 948 | } |
| 949 | if (emu->cur_mod == 1) |
| 950 | offset += (int8_t)fetch_byte_imm(emu); |
| 951 | else if (emu->cur_mod == 2) |
| 952 | offset += fetch_word_imm(emu); |
| 953 | return offset; |
| 954 | } |
| 955 | } |
| 956 | |
| 957 | static uint8_t |
| 958 | decode_and_fetch_byte(struct X86EMU *emu) |
| 959 | { |
| 960 | if (emu->cur_mod != 3) { |
| 961 | emu->cur_offset = decode_rl_address(emu); |
| 962 | return fetch_data_byte(emu, emu->cur_offset); |
| 963 | } else { |
| 964 | return *decode_rl_byte_register(emu); |
| 965 | } |
| 966 | } |
| 967 | |
| 968 | static uint16_t |
| 969 | decode_and_fetch_word_disp(struct X86EMU *emu, int16_t disp) |
| 970 | { |
| 971 | if (emu->cur_mod != 3) { |
| 972 | /* TODO: A20 gate emulation */ |
| 973 | emu->cur_offset = decode_rl_address(emu) + disp; |
| 974 | if ((emu->x86.mode & SYSMODE_PREFIX_ADDR) == 0) |
| 975 | emu->cur_offset &= 0xffff; |
| 976 | return fetch_data_word(emu, emu->cur_offset); |
| 977 | } else { |
| 978 | return *decode_rl_word_register(emu); |
| 979 | } |
| 980 | } |
| 981 | |
| 982 | static uint32_t |
| 983 | decode_and_fetch_long_disp(struct X86EMU *emu, int16_t disp) |
| 984 | { |
| 985 | if (emu->cur_mod != 3) { |
| 986 | /* TODO: A20 gate emulation */ |
| 987 | emu->cur_offset = decode_rl_address(emu) + disp; |
| 988 | if ((emu->x86.mode & SYSMODE_PREFIX_ADDR) == 0) |
| 989 | emu->cur_offset &= 0xffff; |
| 990 | return fetch_data_long(emu, emu->cur_offset); |
| 991 | } else { |
| 992 | return *decode_rl_long_register(emu); |
| 993 | } |
| 994 | } |
| 995 | |
| 996 | uint16_t |
| 997 | decode_and_fetch_word(struct X86EMU *emu) |
| 998 | { |
| 999 | return decode_and_fetch_word_disp(emu, 0); |
| 1000 | } |
| 1001 | |
| 1002 | uint32_t |
| 1003 | decode_and_fetch_long(struct X86EMU *emu) |
| 1004 | { |
| 1005 | return decode_and_fetch_long_disp(emu, 0); |
| 1006 | } |
| 1007 | |
| 1008 | uint8_t |
| 1009 | decode_and_fetch_byte_imm8(struct X86EMU *emu, uint8_t *imm) |
| 1010 | { |
| 1011 | if (emu->cur_mod != 3) { |
| 1012 | emu->cur_offset = decode_rl_address(emu); |
| 1013 | *imm = fetch_byte_imm(emu); |
| 1014 | return fetch_data_byte(emu, emu->cur_offset); |
| 1015 | } else { |
| 1016 | *imm = fetch_byte_imm(emu); |
| 1017 | return *decode_rl_byte_register(emu); |
| 1018 | } |
| 1019 | } |
| 1020 | |
| 1021 | static uint16_t |
| 1022 | decode_and_fetch_word_imm8(struct X86EMU *emu, uint8_t *imm) |
| 1023 | { |
| 1024 | if (emu->cur_mod != 3) { |
| 1025 | emu->cur_offset = decode_rl_address(emu); |
| 1026 | *imm = fetch_byte_imm(emu); |
| 1027 | return fetch_data_word(emu, emu->cur_offset); |
| 1028 | } else { |
| 1029 | *imm = fetch_byte_imm(emu); |
| 1030 | return *decode_rl_word_register(emu); |
| 1031 | } |
| 1032 | } |
| 1033 | |
| 1034 | static uint32_t |
| 1035 | decode_and_fetch_long_imm8(struct X86EMU *emu, uint8_t *imm) |
| 1036 | { |
| 1037 | if (emu->cur_mod != 3) { |
| 1038 | emu->cur_offset = decode_rl_address(emu); |
| 1039 | *imm = fetch_byte_imm(emu); |
| 1040 | return fetch_data_long(emu, emu->cur_offset); |
| 1041 | } else { |
| 1042 | *imm = fetch_byte_imm(emu); |
| 1043 | return *decode_rl_long_register(emu); |
| 1044 | } |
| 1045 | } |
| 1046 | |
| 1047 | static void |
| 1048 | write_back_byte(struct X86EMU *emu, uint8_t val) |
| 1049 | { |
| 1050 | if (emu->cur_mod != 3) |
| 1051 | store_data_byte(emu, emu->cur_offset, val); |
| 1052 | else |
| 1053 | *decode_rl_byte_register(emu) = val; |
| 1054 | } |
| 1055 | |
| 1056 | static void |
| 1057 | write_back_word(struct X86EMU *emu, uint16_t val) |
| 1058 | { |
| 1059 | if (emu->cur_mod != 3) |
| 1060 | store_data_word(emu, emu->cur_offset, val); |
| 1061 | else |
| 1062 | *decode_rl_word_register(emu) = val; |
| 1063 | } |
| 1064 | |
| 1065 | static void |
| 1066 | write_back_long(struct X86EMU *emu, uint32_t val) |
| 1067 | { |
| 1068 | if (emu->cur_mod != 3) |
| 1069 | store_data_long(emu, emu->cur_offset, val); |
| 1070 | else |
| 1071 | *decode_rl_long_register(emu) = val; |
| 1072 | } |
| 1073 | |
| 1074 | static void |
| 1075 | common_inc_word_long(struct X86EMU *emu, union X86EMU_register *reg) |
| 1076 | { |
| 1077 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 1078 | reg->I32_reg.e_reg = inc_long(emu, reg->I32_reg.e_reg); |
| 1079 | else |
| 1080 | reg->I16_reg.x_reg = inc_word(emu, reg->I16_reg.x_reg); |
| 1081 | } |
| 1082 | |
| 1083 | static void |
| 1084 | common_dec_word_long(struct X86EMU *emu, union X86EMU_register *reg) |
| 1085 | { |
| 1086 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 1087 | reg->I32_reg.e_reg = dec_long(emu, reg->I32_reg.e_reg); |
| 1088 | else |
| 1089 | reg->I16_reg.x_reg = dec_word(emu, reg->I16_reg.x_reg); |
| 1090 | } |
| 1091 | |
| 1092 | static void |
| 1093 | common_binop_byte_rm_r(struct X86EMU *emu, uint8_t (*binop)(struct X86EMU *, uint8_t, uint8_t)) |
| 1094 | { |
| 1095 | uint32_t destoffset; |
| 1096 | uint8_t *destreg, srcval; |
| 1097 | uint8_t destval; |
| 1098 | |
| 1099 | fetch_decode_modrm(emu); |
| 1100 | srcval = *decode_rh_byte_register(emu); |
| 1101 | if (emu->cur_mod != 3) { |
| 1102 | destoffset = decode_rl_address(emu); |
| 1103 | destval = fetch_data_byte(emu, destoffset); |
| 1104 | destval = (*binop)(emu, destval, srcval); |
| 1105 | store_data_byte(emu, destoffset, destval); |
| 1106 | } else { |
| 1107 | destreg = decode_rl_byte_register(emu); |
| 1108 | *destreg = (*binop)(emu, *destreg, srcval); |
| 1109 | } |
| 1110 | } |
| 1111 | |
| 1112 | static void |
| 1113 | common_binop_ns_byte_rm_r(struct X86EMU *emu, void (*binop)(struct X86EMU *, uint8_t, uint8_t)) |
| 1114 | { |
| 1115 | uint32_t destoffset; |
| 1116 | uint8_t destval, srcval; |
| 1117 | |
| 1118 | fetch_decode_modrm(emu); |
| 1119 | srcval = *decode_rh_byte_register(emu); |
| 1120 | if (emu->cur_mod != 3) { |
| 1121 | destoffset = decode_rl_address(emu); |
| 1122 | destval = fetch_data_byte(emu, destoffset); |
| 1123 | } else { |
| 1124 | destval = *decode_rl_byte_register(emu); |
| 1125 | } |
| 1126 | (*binop)(emu, destval, srcval); |
| 1127 | } |
| 1128 | |
| 1129 | static void |
| 1130 | common_binop_word_rm_r(struct X86EMU *emu, uint16_t (*binop)(struct X86EMU *, uint16_t, uint16_t)) |
| 1131 | { |
| 1132 | uint32_t destoffset; |
| 1133 | uint16_t destval, *destreg, srcval; |
| 1134 | |
| 1135 | fetch_decode_modrm(emu); |
| 1136 | srcval = *decode_rh_word_register(emu); |
| 1137 | if (emu->cur_mod != 3) { |
| 1138 | destoffset = decode_rl_address(emu); |
| 1139 | destval = fetch_data_word(emu, destoffset); |
| 1140 | destval = (*binop)(emu, destval, srcval); |
| 1141 | store_data_word(emu, destoffset, destval); |
| 1142 | } else { |
| 1143 | destreg = decode_rl_word_register(emu); |
| 1144 | *destreg = (*binop)(emu, *destreg, srcval); |
| 1145 | } |
| 1146 | } |
| 1147 | |
| 1148 | static void |
| 1149 | common_binop_byte_r_rm(struct X86EMU *emu, uint8_t (*binop)(struct X86EMU *, uint8_t, uint8_t)) |
| 1150 | { |
| 1151 | uint8_t *destreg, srcval; |
| 1152 | uint32_t srcoffset; |
| 1153 | |
| 1154 | fetch_decode_modrm(emu); |
| 1155 | destreg = decode_rh_byte_register(emu); |
| 1156 | if (emu->cur_mod != 3) { |
| 1157 | srcoffset = decode_rl_address(emu); |
| 1158 | srcval = fetch_data_byte(emu, srcoffset); |
| 1159 | } else { |
| 1160 | srcval = *decode_rl_byte_register(emu); |
| 1161 | } |
| 1162 | *destreg = (*binop)(emu, *destreg, srcval); |
| 1163 | } |
| 1164 | |
| 1165 | static void |
| 1166 | common_binop_long_rm_r(struct X86EMU *emu, uint32_t (*binop)(struct X86EMU *, uint32_t, uint32_t)) |
| 1167 | { |
| 1168 | uint32_t destoffset; |
| 1169 | uint32_t destval, *destreg, srcval; |
| 1170 | |
| 1171 | fetch_decode_modrm(emu); |
| 1172 | srcval = *decode_rh_long_register(emu); |
| 1173 | if (emu->cur_mod != 3) { |
| 1174 | destoffset = decode_rl_address(emu); |
| 1175 | destval = fetch_data_long(emu, destoffset); |
| 1176 | destval = (*binop)(emu, destval, srcval); |
| 1177 | store_data_long(emu, destoffset, destval); |
| 1178 | } else { |
| 1179 | destreg = decode_rl_long_register(emu); |
| 1180 | *destreg = (*binop)(emu, *destreg, srcval); |
| 1181 | } |
| 1182 | } |
| 1183 | |
| 1184 | static void |
| 1185 | common_binop_word_long_rm_r(struct X86EMU *emu, |
| 1186 | uint16_t (*binop16)(struct X86EMU *, uint16_t, uint16_t), uint32_t (*binop32)(struct X86EMU *, uint32_t, uint32_t)) |
| 1187 | { |
| 1188 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 1189 | common_binop_long_rm_r(emu, binop32); |
| 1190 | else |
| 1191 | common_binop_word_rm_r(emu, binop16); |
| 1192 | } |
| 1193 | |
| 1194 | static void |
| 1195 | common_binop_ns_word_rm_r(struct X86EMU *emu, void (*binop)(struct X86EMU *, uint16_t, uint16_t)) |
| 1196 | { |
| 1197 | uint32_t destoffset; |
| 1198 | uint16_t destval, srcval; |
| 1199 | |
| 1200 | fetch_decode_modrm(emu); |
| 1201 | srcval = *decode_rh_word_register(emu); |
| 1202 | if (emu->cur_mod != 3) { |
| 1203 | destoffset = decode_rl_address(emu); |
| 1204 | destval = fetch_data_word(emu, destoffset); |
| 1205 | } else { |
| 1206 | destval = *decode_rl_word_register(emu); |
| 1207 | } |
| 1208 | (*binop)(emu, destval, srcval); |
| 1209 | } |
| 1210 | |
| 1211 | |
| 1212 | static void |
| 1213 | common_binop_ns_long_rm_r(struct X86EMU *emu, void (*binop)(struct X86EMU *, uint32_t, uint32_t)) |
| 1214 | { |
| 1215 | uint32_t destoffset; |
| 1216 | uint32_t destval, srcval; |
| 1217 | |
| 1218 | fetch_decode_modrm(emu); |
| 1219 | srcval = *decode_rh_long_register(emu); |
| 1220 | if (emu->cur_mod != 3) { |
| 1221 | destoffset = decode_rl_address(emu); |
| 1222 | destval = fetch_data_long(emu, destoffset); |
| 1223 | } else { |
| 1224 | destval = *decode_rl_long_register(emu); |
| 1225 | } |
| 1226 | (*binop)(emu, destval, srcval); |
| 1227 | } |
| 1228 | |
| 1229 | static void |
| 1230 | common_binop_ns_word_long_rm_r(struct X86EMU *emu, |
| 1231 | void (*binop16)(struct X86EMU *, uint16_t, uint16_t), void (*binop32)(struct X86EMU *, uint32_t, uint32_t)) |
| 1232 | { |
| 1233 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 1234 | common_binop_ns_long_rm_r(emu, binop32); |
| 1235 | else |
| 1236 | common_binop_ns_word_rm_r(emu, binop16); |
| 1237 | } |
| 1238 | |
| 1239 | static void |
| 1240 | common_binop_long_r_rm(struct X86EMU *emu, uint32_t (*binop)(struct X86EMU *, uint32_t, uint32_t)) |
| 1241 | { |
| 1242 | uint32_t srcoffset; |
| 1243 | uint32_t *destreg, srcval; |
| 1244 | |
| 1245 | fetch_decode_modrm(emu); |
| 1246 | destreg = decode_rh_long_register(emu); |
| 1247 | if (emu->cur_mod != 3) { |
| 1248 | srcoffset = decode_rl_address(emu); |
| 1249 | srcval = fetch_data_long(emu, srcoffset); |
| 1250 | } else { |
| 1251 | srcval = *decode_rl_long_register(emu); |
| 1252 | } |
| 1253 | *destreg = (*binop)(emu, *destreg, srcval); |
| 1254 | } |
| 1255 | |
| 1256 | static void |
| 1257 | common_binop_word_r_rm(struct X86EMU *emu, uint16_t (*binop)(struct X86EMU *, uint16_t, uint16_t)) |
| 1258 | { |
| 1259 | uint32_t srcoffset; |
| 1260 | uint16_t *destreg, srcval; |
| 1261 | |
| 1262 | fetch_decode_modrm(emu); |
| 1263 | destreg = decode_rh_word_register(emu); |
| 1264 | if (emu->cur_mod != 3) { |
| 1265 | srcoffset = decode_rl_address(emu); |
| 1266 | srcval = fetch_data_word(emu, srcoffset); |
| 1267 | } else { |
| 1268 | srcval = *decode_rl_word_register(emu); |
| 1269 | } |
| 1270 | *destreg = (*binop)(emu, *destreg, srcval); |
| 1271 | } |
| 1272 | |
| 1273 | static void |
| 1274 | common_binop_word_long_r_rm(struct X86EMU *emu, |
| 1275 | uint16_t (*binop16)(struct X86EMU *, uint16_t, uint16_t), uint32_t (*binop32)(struct X86EMU *, uint32_t, uint32_t)) |
| 1276 | { |
| 1277 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 1278 | common_binop_long_r_rm(emu, binop32); |
| 1279 | else |
| 1280 | common_binop_word_r_rm(emu, binop16); |
| 1281 | } |
| 1282 | |
| 1283 | static void |
| 1284 | common_binop_byte_imm(struct X86EMU *emu, uint8_t (*binop)(struct X86EMU *, uint8_t, uint8_t)) |
| 1285 | { |
| 1286 | uint8_t srcval; |
| 1287 | |
| 1288 | srcval = fetch_byte_imm(emu); |
| 1289 | emu->x86.R_AL = (*binop)(emu, emu->x86.R_AL, srcval); |
| 1290 | } |
| 1291 | |
| 1292 | static void |
| 1293 | common_binop_word_long_imm(struct X86EMU *emu, |
| 1294 | uint16_t (*binop16)(struct X86EMU *, uint16_t, uint16_t), uint32_t (*binop32)(struct X86EMU *, uint32_t, uint32_t)) |
| 1295 | { |
| 1296 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 1297 | uint32_t srcval; |
| 1298 | |
| 1299 | srcval = fetch_long_imm(emu); |
| 1300 | emu->x86.R_EAX = (*binop32)(emu, emu->x86.R_EAX, srcval); |
| 1301 | } else { |
| 1302 | uint16_t srcval; |
| 1303 | |
| 1304 | srcval = fetch_word_imm(emu); |
| 1305 | emu->x86.R_AX = (*binop16)(emu, emu->x86.R_AX, srcval); |
| 1306 | } |
| 1307 | } |
| 1308 | |
| 1309 | static void |
| 1310 | common_push_word_long(struct X86EMU *emu, union X86EMU_register *reg) |
| 1311 | { |
| 1312 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 1313 | push_long(emu, reg->I32_reg.e_reg); |
| 1314 | else |
| 1315 | push_word(emu, reg->I16_reg.x_reg); |
| 1316 | } |
| 1317 | |
| 1318 | static void |
| 1319 | common_pop_word_long(struct X86EMU *emu, union X86EMU_register *reg) |
| 1320 | { |
| 1321 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 1322 | reg->I32_reg.e_reg = pop_long(emu); |
| 1323 | else |
| 1324 | reg->I16_reg.x_reg = pop_word(emu); |
| 1325 | } |
| 1326 | |
| 1327 | static void |
| 1328 | common_imul_long_IMM(struct X86EMU *emu, bool byte_imm) |
| 1329 | { |
| 1330 | uint32_t srcoffset; |
| 1331 | uint32_t *destreg, srcval; |
| 1332 | int32_t imm; |
| 1333 | uint64_t res; |
| 1334 | |
| 1335 | fetch_decode_modrm(emu); |
| 1336 | destreg = decode_rh_long_register(emu); |
| 1337 | if (emu->cur_mod != 3) { |
| 1338 | srcoffset = decode_rl_address(emu); |
| 1339 | srcval = fetch_data_long(emu, srcoffset); |
| 1340 | } else { |
| 1341 | srcval = *decode_rl_long_register(emu); |
| 1342 | } |
| 1343 | |
| 1344 | if (byte_imm) |
| 1345 | imm = (int8_t)fetch_byte_imm(emu); |
| 1346 | else |
| 1347 | imm = fetch_long_imm(emu); |
| 1348 | res = (int32_t)srcval * imm; |
| 1349 | |
| 1350 | if (res > 0xffffffff) { |
| 1351 | SET_FLAG(F_CF); |
| 1352 | SET_FLAG(F_OF); |
| 1353 | } else { |
| 1354 | CLEAR_FLAG(F_CF); |
| 1355 | CLEAR_FLAG(F_OF); |
| 1356 | } |
| 1357 | *destreg = (uint32_t)res; |
| 1358 | } |
| 1359 | |
| 1360 | static void |
| 1361 | common_imul_word_IMM(struct X86EMU *emu, bool byte_imm) |
| 1362 | { |
| 1363 | uint32_t srcoffset; |
| 1364 | uint16_t *destreg, srcval; |
| 1365 | int16_t imm; |
| 1366 | uint32_t res; |
| 1367 | |
| 1368 | fetch_decode_modrm(emu); |
| 1369 | destreg = decode_rh_word_register(emu); |
| 1370 | if (emu->cur_mod != 3) { |
| 1371 | srcoffset = decode_rl_address(emu); |
| 1372 | srcval = fetch_data_word(emu, srcoffset); |
| 1373 | } else { |
| 1374 | srcval = *decode_rl_word_register(emu); |
| 1375 | } |
| 1376 | |
| 1377 | if (byte_imm) |
| 1378 | imm = (int8_t)fetch_byte_imm(emu); |
| 1379 | else |
| 1380 | imm = fetch_word_imm(emu); |
| 1381 | res = (int16_t)srcval * imm; |
| 1382 | |
| 1383 | if (res > 0xffff) { |
| 1384 | SET_FLAG(F_CF); |
| 1385 | SET_FLAG(F_OF); |
| 1386 | } else { |
| 1387 | CLEAR_FLAG(F_CF); |
| 1388 | CLEAR_FLAG(F_OF); |
| 1389 | } |
| 1390 | *destreg = (uint16_t) res; |
| 1391 | } |
| 1392 | |
| 1393 | static void |
| 1394 | common_imul_imm(struct X86EMU *emu, bool byte_imm) |
| 1395 | { |
| 1396 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 1397 | common_imul_long_IMM(emu, byte_imm); |
| 1398 | else |
| 1399 | common_imul_word_IMM(emu, byte_imm); |
| 1400 | } |
| 1401 | |
| 1402 | static void |
| 1403 | common_jmp_near(struct X86EMU *emu, bool cond) |
| 1404 | { |
| 1405 | int8_t offset; |
| 1406 | uint16_t target; |
| 1407 | |
| 1408 | offset = (int8_t) fetch_byte_imm(emu); |
| 1409 | target = (uint16_t) (emu->x86.R_IP + (int16_t) offset); |
| 1410 | if (cond) |
| 1411 | emu->x86.R_IP = target; |
| 1412 | } |
| 1413 | |
| 1414 | static void |
| 1415 | common_load_far_pointer(struct X86EMU *emu, uint16_t *seg) |
| 1416 | { |
| 1417 | uint16_t *dstreg; |
| 1418 | uint32_t srcoffset; |
| 1419 | |
| 1420 | fetch_decode_modrm(emu); |
| 1421 | if (emu->cur_mod == 3) |
| 1422 | X86EMU_halt_sys(emu); |
| 1423 | |
| 1424 | dstreg = decode_rh_word_register(emu); |
| 1425 | srcoffset = decode_rl_address(emu); |
| 1426 | *dstreg = fetch_data_word(emu, srcoffset); |
| 1427 | *seg = fetch_data_word(emu, srcoffset + 2); |
| 1428 | } |
| 1429 | |
| 1430 | /*----------------------------- Implementation ----------------------------*/ |
| 1431 | /**************************************************************************** |
| 1432 | REMARKS: |
| 1433 | Handles opcode 0x3a |
| 1434 | ****************************************************************************/ |
| 1435 | static void |
| 1436 | x86emuOp_cmp_byte_R_RM(struct X86EMU *emu) |
| 1437 | { |
| 1438 | uint8_t *destreg, srcval; |
| 1439 | |
| 1440 | fetch_decode_modrm(emu); |
| 1441 | destreg = decode_rh_byte_register(emu); |
| 1442 | srcval = decode_and_fetch_byte(emu); |
| 1443 | cmp_byte(emu, *destreg, srcval); |
| 1444 | } |
| 1445 | /**************************************************************************** |
| 1446 | REMARKS: |
| 1447 | Handles opcode 0x3b |
| 1448 | ****************************************************************************/ |
| 1449 | static void |
| 1450 | x86emuOp32_cmp_word_R_RM(struct X86EMU *emu) |
| 1451 | { |
| 1452 | uint32_t srcval, *destreg; |
| 1453 | |
| 1454 | fetch_decode_modrm(emu); |
| 1455 | destreg = decode_rh_long_register(emu); |
| 1456 | srcval = decode_and_fetch_long(emu); |
| 1457 | cmp_long(emu, *destreg, srcval); |
| 1458 | } |
| 1459 | |
| 1460 | static void |
| 1461 | x86emuOp16_cmp_word_R_RM(struct X86EMU *emu) |
| 1462 | { |
| 1463 | uint16_t srcval, *destreg; |
| 1464 | |
| 1465 | fetch_decode_modrm(emu); |
| 1466 | destreg = decode_rh_word_register(emu); |
| 1467 | srcval = decode_and_fetch_word(emu); |
| 1468 | cmp_word(emu, *destreg, srcval); |
| 1469 | } |
| 1470 | |
| 1471 | static void |
| 1472 | x86emuOp_cmp_word_R_RM(struct X86EMU *emu) |
| 1473 | { |
| 1474 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 1475 | x86emuOp32_cmp_word_R_RM(emu); |
| 1476 | else |
| 1477 | x86emuOp16_cmp_word_R_RM(emu); |
| 1478 | } |
| 1479 | /**************************************************************************** |
| 1480 | REMARKS: |
| 1481 | Handles opcode 0x3c |
| 1482 | ****************************************************************************/ |
| 1483 | static void |
| 1484 | x86emuOp_cmp_byte_AL_IMM(struct X86EMU *emu) |
| 1485 | { |
| 1486 | uint8_t srcval; |
| 1487 | |
| 1488 | srcval = fetch_byte_imm(emu); |
| 1489 | cmp_byte(emu, emu->x86.R_AL, srcval); |
| 1490 | } |
| 1491 | /**************************************************************************** |
| 1492 | REMARKS: |
| 1493 | Handles opcode 0x3d |
| 1494 | ****************************************************************************/ |
| 1495 | static void |
| 1496 | x86emuOp32_cmp_word_AX_IMM(struct X86EMU *emu) |
| 1497 | { |
| 1498 | uint32_t srcval; |
| 1499 | |
| 1500 | srcval = fetch_long_imm(emu); |
| 1501 | cmp_long(emu, emu->x86.R_EAX, srcval); |
| 1502 | } |
| 1503 | |
| 1504 | static void |
| 1505 | x86emuOp16_cmp_word_AX_IMM(struct X86EMU *emu) |
| 1506 | { |
| 1507 | uint16_t srcval; |
| 1508 | |
| 1509 | srcval = fetch_word_imm(emu); |
| 1510 | cmp_word(emu, emu->x86.R_AX, srcval); |
| 1511 | } |
| 1512 | |
| 1513 | static void |
| 1514 | x86emuOp_cmp_word_AX_IMM(struct X86EMU *emu) |
| 1515 | { |
| 1516 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 1517 | x86emuOp32_cmp_word_AX_IMM(emu); |
| 1518 | else |
| 1519 | x86emuOp16_cmp_word_AX_IMM(emu); |
| 1520 | } |
| 1521 | /**************************************************************************** |
| 1522 | REMARKS: |
| 1523 | Handles opcode 0x60 |
| 1524 | ****************************************************************************/ |
| 1525 | static void |
| 1526 | x86emuOp_push_all(struct X86EMU *emu) |
| 1527 | { |
| 1528 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 1529 | uint32_t old_sp = emu->x86.R_ESP; |
| 1530 | |
| 1531 | push_long(emu, emu->x86.R_EAX); |
| 1532 | push_long(emu, emu->x86.R_ECX); |
| 1533 | push_long(emu, emu->x86.R_EDX); |
| 1534 | push_long(emu, emu->x86.R_EBX); |
| 1535 | push_long(emu, old_sp); |
| 1536 | push_long(emu, emu->x86.R_EBP); |
| 1537 | push_long(emu, emu->x86.R_ESI); |
| 1538 | push_long(emu, emu->x86.R_EDI); |
| 1539 | } else { |
| 1540 | uint16_t old_sp = emu->x86.R_SP; |
| 1541 | |
| 1542 | push_word(emu, emu->x86.R_AX); |
| 1543 | push_word(emu, emu->x86.R_CX); |
| 1544 | push_word(emu, emu->x86.R_DX); |
| 1545 | push_word(emu, emu->x86.R_BX); |
| 1546 | push_word(emu, old_sp); |
| 1547 | push_word(emu, emu->x86.R_BP); |
| 1548 | push_word(emu, emu->x86.R_SI); |
| 1549 | push_word(emu, emu->x86.R_DI); |
| 1550 | } |
| 1551 | } |
| 1552 | /**************************************************************************** |
| 1553 | REMARKS: |
| 1554 | Handles opcode 0x61 |
| 1555 | ****************************************************************************/ |
| 1556 | static void |
| 1557 | x86emuOp_pop_all(struct X86EMU *emu) |
| 1558 | { |
| 1559 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 1560 | emu->x86.R_EDI = pop_long(emu); |
| 1561 | emu->x86.R_ESI = pop_long(emu); |
| 1562 | emu->x86.R_EBP = pop_long(emu); |
| 1563 | emu->x86.R_ESP += 4; /* skip ESP */ |
| 1564 | emu->x86.R_EBX = pop_long(emu); |
| 1565 | emu->x86.R_EDX = pop_long(emu); |
| 1566 | emu->x86.R_ECX = pop_long(emu); |
| 1567 | emu->x86.R_EAX = pop_long(emu); |
| 1568 | } else { |
| 1569 | emu->x86.R_DI = pop_word(emu); |
| 1570 | emu->x86.R_SI = pop_word(emu); |
| 1571 | emu->x86.R_BP = pop_word(emu); |
| 1572 | emu->x86.R_SP += 2;/* skip SP */ |
| 1573 | emu->x86.R_BX = pop_word(emu); |
| 1574 | emu->x86.R_DX = pop_word(emu); |
| 1575 | emu->x86.R_CX = pop_word(emu); |
| 1576 | emu->x86.R_AX = pop_word(emu); |
| 1577 | } |
| 1578 | } |
| 1579 | /*opcode 0x62 ILLEGAL OP, calls x86emuOp_illegal_op() */ |
| 1580 | /*opcode 0x63 ILLEGAL OP, calls x86emuOp_illegal_op() */ |
| 1581 | |
| 1582 | /**************************************************************************** |
| 1583 | REMARKS: |
| 1584 | Handles opcode 0x68 |
| 1585 | ****************************************************************************/ |
| 1586 | static void |
| 1587 | x86emuOp_push_word_IMM(struct X86EMU *emu) |
| 1588 | { |
| 1589 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 1590 | uint32_t imm; |
| 1591 | |
| 1592 | imm = fetch_long_imm(emu); |
| 1593 | push_long(emu, imm); |
| 1594 | } else { |
| 1595 | uint16_t imm; |
| 1596 | |
| 1597 | imm = fetch_word_imm(emu); |
| 1598 | push_word(emu, imm); |
| 1599 | } |
| 1600 | } |
| 1601 | /**************************************************************************** |
| 1602 | REMARKS: |
| 1603 | Handles opcode 0x6a |
| 1604 | ****************************************************************************/ |
| 1605 | static void |
| 1606 | x86emuOp_push_byte_IMM(struct X86EMU *emu) |
| 1607 | { |
| 1608 | int16_t imm; |
| 1609 | |
| 1610 | imm = (int8_t) fetch_byte_imm(emu); |
| 1611 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 1612 | push_long(emu, (int32_t) imm); |
| 1613 | } else { |
| 1614 | push_word(emu, imm); |
| 1615 | } |
| 1616 | } |
| 1617 | /**************************************************************************** |
| 1618 | REMARKS: |
| 1619 | Handles opcode 0x6c |
| 1620 | ****************************************************************************/ |
| 1621 | /**************************************************************************** |
| 1622 | REMARKS: |
| 1623 | Handles opcode 0x6d |
| 1624 | ****************************************************************************/ |
| 1625 | static void |
| 1626 | x86emuOp_ins_word(struct X86EMU *emu) |
| 1627 | { |
| 1628 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 1629 | ins(emu, 4); |
| 1630 | } else { |
| 1631 | ins(emu, 2); |
| 1632 | } |
| 1633 | } |
| 1634 | /**************************************************************************** |
| 1635 | REMARKS: |
| 1636 | Handles opcode 0x6f |
| 1637 | ****************************************************************************/ |
| 1638 | static void |
| 1639 | x86emuOp_outs_word(struct X86EMU *emu) |
| 1640 | { |
| 1641 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 1642 | outs(emu, 4); |
| 1643 | } else { |
| 1644 | outs(emu, 2); |
| 1645 | } |
| 1646 | } |
| 1647 | /**************************************************************************** |
| 1648 | REMARKS: |
| 1649 | Handles opcode 0x7c |
| 1650 | ****************************************************************************/ |
| 1651 | static void |
| 1652 | x86emuOp_jump_near_L(struct X86EMU *emu) |
| 1653 | { |
| 1654 | bool sf, of; |
| 1655 | |
| 1656 | sf = ACCESS_FLAG(F_SF) != 0; |
| 1657 | of = ACCESS_FLAG(F_OF) != 0; |
| 1658 | |
| 1659 | common_jmp_near(emu, sf != of); |
| 1660 | } |
| 1661 | /**************************************************************************** |
| 1662 | REMARKS: |
| 1663 | Handles opcode 0x7d |
| 1664 | ****************************************************************************/ |
| 1665 | static void |
| 1666 | x86emuOp_jump_near_NL(struct X86EMU *emu) |
| 1667 | { |
| 1668 | bool sf, of; |
| 1669 | |
| 1670 | sf = ACCESS_FLAG(F_SF) != 0; |
| 1671 | of = ACCESS_FLAG(F_OF) != 0; |
| 1672 | |
| 1673 | common_jmp_near(emu, sf == of); |
| 1674 | } |
| 1675 | /**************************************************************************** |
| 1676 | REMARKS: |
| 1677 | Handles opcode 0x7e |
| 1678 | ****************************************************************************/ |
| 1679 | static void |
| 1680 | x86emuOp_jump_near_LE(struct X86EMU *emu) |
| 1681 | { |
| 1682 | bool sf, of; |
| 1683 | |
| 1684 | sf = ACCESS_FLAG(F_SF) != 0; |
| 1685 | of = ACCESS_FLAG(F_OF) != 0; |
| 1686 | |
| 1687 | common_jmp_near(emu, sf != of || ACCESS_FLAG(F_ZF)); |
| 1688 | } |
| 1689 | /**************************************************************************** |
| 1690 | REMARKS: |
| 1691 | Handles opcode 0x7f |
| 1692 | ****************************************************************************/ |
| 1693 | static void |
| 1694 | x86emuOp_jump_near_NLE(struct X86EMU *emu) |
| 1695 | { |
| 1696 | bool sf, of; |
| 1697 | |
| 1698 | sf = ACCESS_FLAG(F_SF) != 0; |
| 1699 | of = ACCESS_FLAG(F_OF) != 0; |
| 1700 | |
| 1701 | common_jmp_near(emu, sf == of && !ACCESS_FLAG(F_ZF)); |
| 1702 | } |
| 1703 | |
| 1704 | static |
| 1705 | uint8_t(*const opc80_byte_operation[]) (struct X86EMU *, uint8_t d, uint8_t s) = |
| 1706 | { |
| 1707 | add_byte, /* 00 */ |
| 1708 | or_byte, /* 01 */ |
| 1709 | adc_byte, /* 02 */ |
| 1710 | sbb_byte, /* 03 */ |
| 1711 | and_byte, /* 04 */ |
| 1712 | sub_byte, /* 05 */ |
| 1713 | xor_byte, /* 06 */ |
| 1714 | cmp_byte, /* 07 */ |
| 1715 | }; |
| 1716 | /**************************************************************************** |
| 1717 | REMARKS: |
| 1718 | Handles opcode 0x80 |
| 1719 | ****************************************************************************/ |
| 1720 | static void |
| 1721 | x86emuOp_opc80_byte_RM_IMM(struct X86EMU *emu) |
| 1722 | { |
| 1723 | uint8_t imm, destval; |
| 1724 | |
| 1725 | /* |
| 1726 | * Weirdo special case instruction format. Part of the opcode |
| 1727 | * held below in "RH". Doubly nested case would result, except |
| 1728 | * that the decoded instruction |
| 1729 | */ |
| 1730 | fetch_decode_modrm(emu); |
| 1731 | destval = decode_and_fetch_byte(emu); |
| 1732 | imm = fetch_byte_imm(emu); |
| 1733 | destval = (*opc80_byte_operation[emu->cur_rh]) (emu, destval, imm); |
| 1734 | if (emu->cur_rh != 7) |
| 1735 | write_back_byte(emu, destval); |
| 1736 | } |
| 1737 | |
| 1738 | static |
| 1739 | uint16_t(* const opc81_word_operation[]) (struct X86EMU *, uint16_t d, uint16_t s) = |
| 1740 | { |
| 1741 | add_word, /* 00 */ |
| 1742 | or_word, /* 01 */ |
| 1743 | adc_word, /* 02 */ |
| 1744 | sbb_word, /* 03 */ |
| 1745 | and_word, /* 04 */ |
| 1746 | sub_word, /* 05 */ |
| 1747 | xor_word, /* 06 */ |
| 1748 | cmp_word, /* 07 */ |
| 1749 | }; |
| 1750 | |
| 1751 | static |
| 1752 | uint32_t(* const opc81_long_operation[]) (struct X86EMU *, uint32_t d, uint32_t s) = |
| 1753 | { |
| 1754 | add_long, /* 00 */ |
| 1755 | or_long, /* 01 */ |
| 1756 | adc_long, /* 02 */ |
| 1757 | sbb_long, /* 03 */ |
| 1758 | and_long, /* 04 */ |
| 1759 | sub_long, /* 05 */ |
| 1760 | xor_long, /* 06 */ |
| 1761 | cmp_long, /* 07 */ |
| 1762 | }; |
| 1763 | /**************************************************************************** |
| 1764 | REMARKS: |
| 1765 | Handles opcode 0x81 |
| 1766 | ****************************************************************************/ |
| 1767 | static void |
| 1768 | x86emuOp32_opc81_word_RM_IMM(struct X86EMU *emu) |
| 1769 | { |
| 1770 | uint32_t destval, imm; |
| 1771 | |
| 1772 | /* |
| 1773 | * Weirdo special case instruction format. Part of the opcode |
| 1774 | * held below in "RH". Doubly nested case would result, except |
| 1775 | * that the decoded instruction |
| 1776 | */ |
| 1777 | fetch_decode_modrm(emu); |
| 1778 | destval = decode_and_fetch_long(emu); |
| 1779 | imm = fetch_long_imm(emu); |
| 1780 | destval = (*opc81_long_operation[emu->cur_rh]) (emu, destval, imm); |
| 1781 | if (emu->cur_rh != 7) |
| 1782 | write_back_long(emu, destval); |
| 1783 | } |
| 1784 | |
| 1785 | static void |
| 1786 | x86emuOp16_opc81_word_RM_IMM(struct X86EMU *emu) |
| 1787 | { |
| 1788 | uint16_t destval, imm; |
| 1789 | |
| 1790 | /* |
| 1791 | * Weirdo special case instruction format. Part of the opcode |
| 1792 | * held below in "RH". Doubly nested case would result, except |
| 1793 | * that the decoded instruction |
| 1794 | */ |
| 1795 | fetch_decode_modrm(emu); |
| 1796 | destval = decode_and_fetch_word(emu); |
| 1797 | imm = fetch_word_imm(emu); |
| 1798 | destval = (*opc81_word_operation[emu->cur_rh]) (emu, destval, imm); |
| 1799 | if (emu->cur_rh != 7) |
| 1800 | write_back_word(emu, destval); |
| 1801 | } |
| 1802 | |
| 1803 | static void |
| 1804 | x86emuOp_opc81_word_RM_IMM(struct X86EMU *emu) |
| 1805 | { |
| 1806 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 1807 | x86emuOp32_opc81_word_RM_IMM(emu); |
| 1808 | else |
| 1809 | x86emuOp16_opc81_word_RM_IMM(emu); |
| 1810 | } |
| 1811 | |
| 1812 | static |
| 1813 | uint8_t(* const opc82_byte_operation[]) (struct X86EMU *, uint8_t s, uint8_t d) = |
| 1814 | { |
| 1815 | add_byte, /* 00 */ |
| 1816 | or_byte, /* 01 *//* YYY UNUSED ???? */ |
| 1817 | adc_byte, /* 02 */ |
| 1818 | sbb_byte, /* 03 */ |
| 1819 | and_byte, /* 04 *//* YYY UNUSED ???? */ |
| 1820 | sub_byte, /* 05 */ |
| 1821 | xor_byte, /* 06 *//* YYY UNUSED ???? */ |
| 1822 | cmp_byte, /* 07 */ |
| 1823 | }; |
| 1824 | /**************************************************************************** |
| 1825 | REMARKS: |
| 1826 | Handles opcode 0x82 |
| 1827 | ****************************************************************************/ |
| 1828 | static void |
| 1829 | x86emuOp_opc82_byte_RM_IMM(struct X86EMU *emu) |
| 1830 | { |
| 1831 | uint8_t imm, destval; |
| 1832 | |
| 1833 | /* |
| 1834 | * Weirdo special case instruction format. Part of the opcode |
| 1835 | * held below in "RH". Doubly nested case would result, except |
| 1836 | * that the decoded instruction Similar to opcode 81, except that |
| 1837 | * the immediate byte is sign extended to a word length. |
| 1838 | */ |
| 1839 | fetch_decode_modrm(emu); |
| 1840 | destval = decode_and_fetch_byte(emu); |
| 1841 | imm = fetch_byte_imm(emu); |
| 1842 | destval = (*opc82_byte_operation[emu->cur_rh]) (emu, destval, imm); |
| 1843 | if (emu->cur_rh != 7) |
| 1844 | write_back_byte(emu, destval); |
| 1845 | } |
| 1846 | |
| 1847 | static |
| 1848 | uint16_t(* const opc83_word_operation[]) (struct X86EMU *, uint16_t s, uint16_t d) = |
| 1849 | { |
| 1850 | add_word, /* 00 */ |
| 1851 | or_word, /* 01 *//* YYY UNUSED ???? */ |
| 1852 | adc_word, /* 02 */ |
| 1853 | sbb_word, /* 03 */ |
| 1854 | and_word, /* 04 *//* YYY UNUSED ???? */ |
| 1855 | sub_word, /* 05 */ |
| 1856 | xor_word, /* 06 *//* YYY UNUSED ???? */ |
| 1857 | cmp_word, /* 07 */ |
| 1858 | }; |
| 1859 | |
| 1860 | static |
| 1861 | uint32_t(* const opc83_long_operation[]) (struct X86EMU *, uint32_t s, uint32_t d) = |
| 1862 | { |
| 1863 | add_long, /* 00 */ |
| 1864 | or_long, /* 01 *//* YYY UNUSED ???? */ |
| 1865 | adc_long, /* 02 */ |
| 1866 | sbb_long, /* 03 */ |
| 1867 | and_long, /* 04 *//* YYY UNUSED ???? */ |
| 1868 | sub_long, /* 05 */ |
| 1869 | xor_long, /* 06 *//* YYY UNUSED ???? */ |
| 1870 | cmp_long, /* 07 */ |
| 1871 | }; |
| 1872 | /**************************************************************************** |
| 1873 | REMARKS: |
| 1874 | Handles opcode 0x83 |
| 1875 | ****************************************************************************/ |
| 1876 | static void |
| 1877 | x86emuOp32_opc83_word_RM_IMM(struct X86EMU *emu) |
| 1878 | { |
| 1879 | uint32_t destval, imm; |
| 1880 | |
| 1881 | fetch_decode_modrm(emu); |
| 1882 | destval = decode_and_fetch_long(emu); |
| 1883 | imm = (int8_t) fetch_byte_imm(emu); |
| 1884 | destval = (*opc83_long_operation[emu->cur_rh]) (emu, destval, imm); |
| 1885 | if (emu->cur_rh != 7) |
| 1886 | write_back_long(emu, destval); |
| 1887 | } |
| 1888 | |
| 1889 | static void |
| 1890 | x86emuOp16_opc83_word_RM_IMM(struct X86EMU *emu) |
| 1891 | { |
| 1892 | uint16_t destval, imm; |
| 1893 | |
| 1894 | fetch_decode_modrm(emu); |
| 1895 | destval = decode_and_fetch_word(emu); |
| 1896 | imm = (int8_t) fetch_byte_imm(emu); |
| 1897 | destval = (*opc83_word_operation[emu->cur_rh]) (emu, destval, imm); |
| 1898 | if (emu->cur_rh != 7) |
| 1899 | write_back_word(emu, destval); |
| 1900 | } |
| 1901 | |
| 1902 | static void |
| 1903 | x86emuOp_opc83_word_RM_IMM(struct X86EMU *emu) |
| 1904 | { |
| 1905 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 1906 | x86emuOp32_opc83_word_RM_IMM(emu); |
| 1907 | else |
| 1908 | x86emuOp16_opc83_word_RM_IMM(emu); |
| 1909 | } |
| 1910 | /**************************************************************************** |
| 1911 | REMARKS: |
| 1912 | Handles opcode 0x86 |
| 1913 | ****************************************************************************/ |
| 1914 | static void |
| 1915 | x86emuOp_xchg_byte_RM_R(struct X86EMU *emu) |
| 1916 | { |
| 1917 | uint8_t *srcreg, destval, tmp; |
| 1918 | |
| 1919 | fetch_decode_modrm(emu); |
| 1920 | destval = decode_and_fetch_byte(emu); |
| 1921 | srcreg = decode_rh_byte_register(emu); |
| 1922 | tmp = destval; |
| 1923 | destval = *srcreg; |
| 1924 | *srcreg = tmp; |
| 1925 | write_back_byte(emu, destval); |
| 1926 | } |
| 1927 | /**************************************************************************** |
| 1928 | REMARKS: |
| 1929 | Handles opcode 0x87 |
| 1930 | ****************************************************************************/ |
| 1931 | static void |
| 1932 | x86emuOp32_xchg_word_RM_R(struct X86EMU *emu) |
| 1933 | { |
| 1934 | uint32_t *srcreg, destval, tmp; |
| 1935 | |
| 1936 | fetch_decode_modrm(emu); |
| 1937 | destval = decode_and_fetch_long(emu); |
| 1938 | srcreg = decode_rh_long_register(emu); |
| 1939 | tmp = destval; |
| 1940 | destval = *srcreg; |
| 1941 | *srcreg = tmp; |
| 1942 | write_back_long(emu, destval); |
| 1943 | } |
| 1944 | |
| 1945 | static void |
| 1946 | x86emuOp16_xchg_word_RM_R(struct X86EMU *emu) |
| 1947 | { |
| 1948 | uint16_t *srcreg, destval, tmp; |
| 1949 | |
| 1950 | fetch_decode_modrm(emu); |
| 1951 | destval = decode_and_fetch_word(emu); |
| 1952 | srcreg = decode_rh_word_register(emu); |
| 1953 | tmp = destval; |
| 1954 | destval = *srcreg; |
| 1955 | *srcreg = tmp; |
| 1956 | write_back_word(emu, destval); |
| 1957 | } |
| 1958 | |
| 1959 | static void |
| 1960 | x86emuOp_xchg_word_RM_R(struct X86EMU *emu) |
| 1961 | { |
| 1962 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 1963 | x86emuOp32_xchg_word_RM_R(emu); |
| 1964 | else |
| 1965 | x86emuOp16_xchg_word_RM_R(emu); |
| 1966 | } |
| 1967 | /**************************************************************************** |
| 1968 | REMARKS: |
| 1969 | Handles opcode 0x88 |
| 1970 | ****************************************************************************/ |
| 1971 | static void |
| 1972 | x86emuOp_mov_byte_RM_R(struct X86EMU *emu) |
| 1973 | { |
| 1974 | uint8_t *destreg, *srcreg; |
| 1975 | uint32_t destoffset; |
| 1976 | |
| 1977 | fetch_decode_modrm(emu); |
| 1978 | srcreg = decode_rh_byte_register(emu); |
| 1979 | if (emu->cur_mod != 3) { |
| 1980 | destoffset = decode_rl_address(emu); |
| 1981 | store_data_byte(emu, destoffset, *srcreg); |
| 1982 | } else { |
| 1983 | destreg = decode_rl_byte_register(emu); |
| 1984 | *destreg = *srcreg; |
| 1985 | } |
| 1986 | } |
| 1987 | /**************************************************************************** |
| 1988 | REMARKS: |
| 1989 | Handles opcode 0x89 |
| 1990 | ****************************************************************************/ |
| 1991 | static void |
| 1992 | x86emuOp32_mov_word_RM_R(struct X86EMU *emu) |
| 1993 | { |
| 1994 | uint32_t destoffset; |
| 1995 | uint32_t *destreg, srcval; |
| 1996 | |
| 1997 | fetch_decode_modrm(emu); |
| 1998 | srcval = *decode_rh_long_register(emu); |
| 1999 | if (emu->cur_mod != 3) { |
| 2000 | destoffset = decode_rl_address(emu); |
| 2001 | store_data_long(emu, destoffset, srcval); |
| 2002 | } else { |
| 2003 | destreg = decode_rl_long_register(emu); |
| 2004 | *destreg = srcval; |
| 2005 | } |
| 2006 | } |
| 2007 | |
| 2008 | static void |
| 2009 | x86emuOp16_mov_word_RM_R(struct X86EMU *emu) |
| 2010 | { |
| 2011 | uint32_t destoffset; |
| 2012 | uint16_t *destreg, srcval; |
| 2013 | |
| 2014 | fetch_decode_modrm(emu); |
| 2015 | srcval = *decode_rh_word_register(emu); |
| 2016 | if (emu->cur_mod != 3) { |
| 2017 | destoffset = decode_rl_address(emu); |
| 2018 | store_data_word(emu, destoffset, srcval); |
| 2019 | } else { |
| 2020 | destreg = decode_rl_word_register(emu); |
| 2021 | *destreg = srcval; |
| 2022 | } |
| 2023 | } |
| 2024 | |
| 2025 | static void |
| 2026 | x86emuOp_mov_word_RM_R(struct X86EMU *emu) |
| 2027 | { |
| 2028 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 2029 | x86emuOp32_mov_word_RM_R(emu); |
| 2030 | else |
| 2031 | x86emuOp16_mov_word_RM_R(emu); |
| 2032 | } |
| 2033 | /**************************************************************************** |
| 2034 | REMARKS: |
| 2035 | Handles opcode 0x8a |
| 2036 | ****************************************************************************/ |
| 2037 | static void |
| 2038 | x86emuOp_mov_byte_R_RM(struct X86EMU *emu) |
| 2039 | { |
| 2040 | uint8_t *destreg; |
| 2041 | |
| 2042 | fetch_decode_modrm(emu); |
| 2043 | destreg = decode_rh_byte_register(emu); |
| 2044 | *destreg = decode_and_fetch_byte(emu); |
| 2045 | } |
| 2046 | /**************************************************************************** |
| 2047 | REMARKS: |
| 2048 | Handles opcode 0x8b |
| 2049 | ****************************************************************************/ |
| 2050 | static void |
| 2051 | x86emuOp_mov_word_R_RM(struct X86EMU *emu) |
| 2052 | { |
| 2053 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2054 | uint32_t *destreg; |
| 2055 | |
| 2056 | fetch_decode_modrm(emu); |
| 2057 | destreg = decode_rh_long_register(emu); |
| 2058 | *destreg = decode_and_fetch_long(emu); |
| 2059 | } else { |
| 2060 | uint16_t *destreg; |
| 2061 | |
| 2062 | fetch_decode_modrm(emu); |
| 2063 | destreg = decode_rh_word_register(emu); |
| 2064 | *destreg = decode_and_fetch_word(emu); |
| 2065 | } |
| 2066 | } |
| 2067 | /**************************************************************************** |
| 2068 | REMARKS: |
| 2069 | Handles opcode 0x8c |
| 2070 | ****************************************************************************/ |
| 2071 | static void |
| 2072 | x86emuOp_mov_word_RM_SR(struct X86EMU *emu) |
| 2073 | { |
| 2074 | uint16_t *destreg, srcval; |
| 2075 | uint32_t destoffset; |
| 2076 | |
| 2077 | fetch_decode_modrm(emu); |
| 2078 | srcval = *decode_rh_seg_register(emu); |
| 2079 | if (emu->cur_mod != 3) { |
| 2080 | destoffset = decode_rl_address(emu); |
| 2081 | store_data_word(emu, destoffset, srcval); |
| 2082 | } else { |
| 2083 | destreg = decode_rl_word_register(emu); |
| 2084 | *destreg = srcval; |
| 2085 | } |
| 2086 | } |
| 2087 | /**************************************************************************** |
| 2088 | REMARKS: |
| 2089 | Handles opcode 0x8d |
| 2090 | ****************************************************************************/ |
| 2091 | static void |
| 2092 | x86emuOp_lea_word_R_M(struct X86EMU *emu) |
| 2093 | { |
| 2094 | uint32_t destoffset; |
| 2095 | |
| 2096 | fetch_decode_modrm(emu); |
| 2097 | if (emu->cur_mod == 3) |
| 2098 | X86EMU_halt_sys(emu); |
| 2099 | |
| 2100 | destoffset = decode_rl_address(emu); |
| 2101 | if (emu->x86.mode & SYSMODE_PREFIX_ADDR) { |
| 2102 | uint32_t *srcreg; |
| 2103 | |
| 2104 | srcreg = decode_rh_long_register(emu); |
| 2105 | *srcreg = (uint32_t) destoffset; |
| 2106 | } else { |
| 2107 | uint16_t *srcreg; |
| 2108 | |
| 2109 | srcreg = decode_rh_word_register(emu); |
| 2110 | *srcreg = (uint16_t) destoffset; |
| 2111 | } |
| 2112 | } |
| 2113 | /**************************************************************************** |
| 2114 | REMARKS: |
| 2115 | Handles opcode 0x8e |
| 2116 | ****************************************************************************/ |
| 2117 | static void |
| 2118 | x86emuOp_mov_word_SR_RM(struct X86EMU *emu) |
| 2119 | { |
| 2120 | uint16_t *destreg; |
| 2121 | |
| 2122 | fetch_decode_modrm(emu); |
| 2123 | destreg = decode_rh_seg_register(emu); |
| 2124 | *destreg = decode_and_fetch_word(emu); |
| 2125 | /* |
| 2126 | * Clean up, and reset all the R_xSP pointers to the correct |
| 2127 | * locations. This is about 3x too much overhead (doing all the |
| 2128 | * segreg ptrs when only one is needed, but this instruction |
| 2129 | * *cannot* be that common, and this isn't too much work anyway. |
| 2130 | */ |
| 2131 | } |
| 2132 | /**************************************************************************** |
| 2133 | REMARKS: |
| 2134 | Handles opcode 0x8f |
| 2135 | ****************************************************************************/ |
| 2136 | static void |
| 2137 | x86emuOp32_pop_RM(struct X86EMU *emu) |
| 2138 | { |
| 2139 | uint32_t destoffset; |
| 2140 | uint32_t destval, *destreg; |
| 2141 | |
| 2142 | fetch_decode_modrm(emu); |
| 2143 | if (emu->cur_mod != 3) { |
| 2144 | destoffset = decode_rl_address(emu); |
| 2145 | destval = pop_long(emu); |
| 2146 | store_data_long(emu, destoffset, destval); |
| 2147 | } else { |
| 2148 | destreg = decode_rl_long_register(emu); |
| 2149 | *destreg = pop_long(emu); |
| 2150 | } |
| 2151 | } |
| 2152 | |
| 2153 | static void |
| 2154 | x86emuOp16_pop_RM(struct X86EMU *emu) |
| 2155 | { |
| 2156 | uint32_t destoffset; |
| 2157 | uint16_t destval, *destreg; |
| 2158 | |
| 2159 | fetch_decode_modrm(emu); |
| 2160 | if (emu->cur_mod != 3) { |
| 2161 | destoffset = decode_rl_address(emu); |
| 2162 | destval = pop_word(emu); |
| 2163 | store_data_word(emu, destoffset, destval); |
| 2164 | } else { |
| 2165 | destreg = decode_rl_word_register(emu); |
| 2166 | *destreg = pop_word(emu); |
| 2167 | } |
| 2168 | } |
| 2169 | |
| 2170 | static void |
| 2171 | x86emuOp_pop_RM(struct X86EMU *emu) |
| 2172 | { |
| 2173 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 2174 | x86emuOp32_pop_RM(emu); |
| 2175 | else |
| 2176 | x86emuOp16_pop_RM(emu); |
| 2177 | } |
| 2178 | /**************************************************************************** |
| 2179 | REMARKS: |
| 2180 | Handles opcode 0x91 |
| 2181 | ****************************************************************************/ |
| 2182 | static void |
| 2183 | x86emuOp_xchg_word_AX_CX(struct X86EMU *emu) |
| 2184 | { |
| 2185 | uint32_t tmp; |
| 2186 | |
| 2187 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2188 | tmp = emu->x86.R_EAX; |
| 2189 | emu->x86.R_EAX = emu->x86.R_ECX; |
| 2190 | emu->x86.R_ECX = tmp; |
| 2191 | } else { |
| 2192 | tmp = emu->x86.R_AX; |
| 2193 | emu->x86.R_AX = emu->x86.R_CX; |
| 2194 | emu->x86.R_CX = (uint16_t) tmp; |
| 2195 | } |
| 2196 | } |
| 2197 | /**************************************************************************** |
| 2198 | REMARKS: |
| 2199 | Handles opcode 0x92 |
| 2200 | ****************************************************************************/ |
| 2201 | static void |
| 2202 | x86emuOp_xchg_word_AX_DX(struct X86EMU *emu) |
| 2203 | { |
| 2204 | uint32_t tmp; |
| 2205 | |
| 2206 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2207 | tmp = emu->x86.R_EAX; |
| 2208 | emu->x86.R_EAX = emu->x86.R_EDX; |
| 2209 | emu->x86.R_EDX = tmp; |
| 2210 | } else { |
| 2211 | tmp = emu->x86.R_AX; |
| 2212 | emu->x86.R_AX = emu->x86.R_DX; |
| 2213 | emu->x86.R_DX = (uint16_t) tmp; |
| 2214 | } |
| 2215 | } |
| 2216 | /**************************************************************************** |
| 2217 | REMARKS: |
| 2218 | Handles opcode 0x93 |
| 2219 | ****************************************************************************/ |
| 2220 | static void |
| 2221 | x86emuOp_xchg_word_AX_BX(struct X86EMU *emu) |
| 2222 | { |
| 2223 | uint32_t tmp; |
| 2224 | |
| 2225 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2226 | tmp = emu->x86.R_EAX; |
| 2227 | emu->x86.R_EAX = emu->x86.R_EBX; |
| 2228 | emu->x86.R_EBX = tmp; |
| 2229 | } else { |
| 2230 | tmp = emu->x86.R_AX; |
| 2231 | emu->x86.R_AX = emu->x86.R_BX; |
| 2232 | emu->x86.R_BX = (uint16_t) tmp; |
| 2233 | } |
| 2234 | } |
| 2235 | /**************************************************************************** |
| 2236 | REMARKS: |
| 2237 | Handles opcode 0x94 |
| 2238 | ****************************************************************************/ |
| 2239 | static void |
| 2240 | x86emuOp_xchg_word_AX_SP(struct X86EMU *emu) |
| 2241 | { |
| 2242 | uint32_t tmp; |
| 2243 | |
| 2244 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2245 | tmp = emu->x86.R_EAX; |
| 2246 | emu->x86.R_EAX = emu->x86.R_ESP; |
| 2247 | emu->x86.R_ESP = tmp; |
| 2248 | } else { |
| 2249 | tmp = emu->x86.R_AX; |
| 2250 | emu->x86.R_AX = emu->x86.R_SP; |
| 2251 | emu->x86.R_SP = (uint16_t) tmp; |
| 2252 | } |
| 2253 | } |
| 2254 | /**************************************************************************** |
| 2255 | REMARKS: |
| 2256 | Handles opcode 0x95 |
| 2257 | ****************************************************************************/ |
| 2258 | static void |
| 2259 | x86emuOp_xchg_word_AX_BP(struct X86EMU *emu) |
| 2260 | { |
| 2261 | uint32_t tmp; |
| 2262 | |
| 2263 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2264 | tmp = emu->x86.R_EAX; |
| 2265 | emu->x86.R_EAX = emu->x86.R_EBP; |
| 2266 | emu->x86.R_EBP = tmp; |
| 2267 | } else { |
| 2268 | tmp = emu->x86.R_AX; |
| 2269 | emu->x86.R_AX = emu->x86.R_BP; |
| 2270 | emu->x86.R_BP = (uint16_t) tmp; |
| 2271 | } |
| 2272 | } |
| 2273 | /**************************************************************************** |
| 2274 | REMARKS: |
| 2275 | Handles opcode 0x96 |
| 2276 | ****************************************************************************/ |
| 2277 | static void |
| 2278 | x86emuOp_xchg_word_AX_SI(struct X86EMU *emu) |
| 2279 | { |
| 2280 | uint32_t tmp; |
| 2281 | |
| 2282 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2283 | tmp = emu->x86.R_EAX; |
| 2284 | emu->x86.R_EAX = emu->x86.R_ESI; |
| 2285 | emu->x86.R_ESI = tmp; |
| 2286 | } else { |
| 2287 | tmp = emu->x86.R_AX; |
| 2288 | emu->x86.R_AX = emu->x86.R_SI; |
| 2289 | emu->x86.R_SI = (uint16_t) tmp; |
| 2290 | } |
| 2291 | } |
| 2292 | /**************************************************************************** |
| 2293 | REMARKS: |
| 2294 | Handles opcode 0x97 |
| 2295 | ****************************************************************************/ |
| 2296 | static void |
| 2297 | x86emuOp_xchg_word_AX_DI(struct X86EMU *emu) |
| 2298 | { |
| 2299 | uint32_t tmp; |
| 2300 | |
| 2301 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2302 | tmp = emu->x86.R_EAX; |
| 2303 | emu->x86.R_EAX = emu->x86.R_EDI; |
| 2304 | emu->x86.R_EDI = tmp; |
| 2305 | } else { |
| 2306 | tmp = emu->x86.R_AX; |
| 2307 | emu->x86.R_AX = emu->x86.R_DI; |
| 2308 | emu->x86.R_DI = (uint16_t) tmp; |
| 2309 | } |
| 2310 | } |
| 2311 | /**************************************************************************** |
| 2312 | REMARKS: |
| 2313 | Handles opcode 0x98 |
| 2314 | ****************************************************************************/ |
| 2315 | static void |
| 2316 | x86emuOp_cbw(struct X86EMU *emu) |
| 2317 | { |
| 2318 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2319 | if (emu->x86.R_AX & 0x8000) { |
| 2320 | emu->x86.R_EAX |= 0xffff0000; |
| 2321 | } else { |
| 2322 | emu->x86.R_EAX &= 0x0000ffff; |
| 2323 | } |
| 2324 | } else { |
| 2325 | if (emu->x86.R_AL & 0x80) { |
| 2326 | emu->x86.R_AH = 0xff; |
| 2327 | } else { |
| 2328 | emu->x86.R_AH = 0x0; |
| 2329 | } |
| 2330 | } |
| 2331 | } |
| 2332 | /**************************************************************************** |
| 2333 | REMARKS: |
| 2334 | Handles opcode 0x99 |
| 2335 | ****************************************************************************/ |
| 2336 | static void |
| 2337 | x86emuOp_cwd(struct X86EMU *emu) |
| 2338 | { |
| 2339 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2340 | if (emu->x86.R_EAX & 0x80000000) { |
| 2341 | emu->x86.R_EDX = 0xffffffff; |
| 2342 | } else { |
| 2343 | emu->x86.R_EDX = 0x0; |
| 2344 | } |
| 2345 | } else { |
| 2346 | if (emu->x86.R_AX & 0x8000) { |
| 2347 | emu->x86.R_DX = 0xffff; |
| 2348 | } else { |
| 2349 | emu->x86.R_DX = 0x0; |
| 2350 | } |
| 2351 | } |
| 2352 | } |
| 2353 | /**************************************************************************** |
| 2354 | REMARKS: |
| 2355 | Handles opcode 0x9a |
| 2356 | ****************************************************************************/ |
| 2357 | static void |
| 2358 | x86emuOp_call_far_IMM(struct X86EMU *emu) |
| 2359 | { |
| 2360 | uint16_t farseg, faroff; |
| 2361 | |
| 2362 | faroff = fetch_word_imm(emu); |
| 2363 | farseg = fetch_word_imm(emu); |
| 2364 | /* XXX |
| 2365 | * |
| 2366 | * Hooked interrupt vectors calling into our "BIOS" will cause problems |
| 2367 | * unless all intersegment stuff is checked for BIOS access. Check |
| 2368 | * needed here. For moment, let it alone. */ |
| 2369 | push_word(emu, emu->x86.R_CS); |
| 2370 | emu->x86.R_CS = farseg; |
| 2371 | push_word(emu, emu->x86.R_IP); |
| 2372 | emu->x86.R_IP = faroff; |
| 2373 | } |
| 2374 | /**************************************************************************** |
| 2375 | REMARKS: |
| 2376 | Handles opcode 0x9c |
| 2377 | ****************************************************************************/ |
| 2378 | static void |
| 2379 | x86emuOp_pushf_word(struct X86EMU *emu) |
| 2380 | { |
| 2381 | uint32_t flags; |
| 2382 | |
| 2383 | /* clear out *all* bits not representing flags, and turn on real bits */ |
| 2384 | flags = (emu->x86.R_EFLG & F_MSK) | F_ALWAYS_ON; |
| 2385 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2386 | push_long(emu, flags); |
| 2387 | } else { |
| 2388 | push_word(emu, (uint16_t) flags); |
| 2389 | } |
| 2390 | } |
| 2391 | /**************************************************************************** |
| 2392 | REMARKS: |
| 2393 | Handles opcode 0x9d |
| 2394 | ****************************************************************************/ |
| 2395 | static void |
| 2396 | x86emuOp_popf_word(struct X86EMU *emu) |
| 2397 | { |
| 2398 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2399 | emu->x86.R_EFLG = pop_long(emu); |
| 2400 | } else { |
| 2401 | emu->x86.R_FLG = pop_word(emu); |
| 2402 | } |
| 2403 | } |
| 2404 | /**************************************************************************** |
| 2405 | REMARKS: |
| 2406 | Handles opcode 0x9e |
| 2407 | ****************************************************************************/ |
| 2408 | static void |
| 2409 | x86emuOp_sahf(struct X86EMU *emu) |
| 2410 | { |
| 2411 | /* clear the lower bits of the flag register */ |
| 2412 | emu->x86.R_FLG &= 0xffffff00; |
| 2413 | /* or in the AH register into the flags register */ |
| 2414 | emu->x86.R_FLG |= emu->x86.R_AH; |
| 2415 | } |
| 2416 | /**************************************************************************** |
| 2417 | REMARKS: |
| 2418 | Handles opcode 0x9f |
| 2419 | ****************************************************************************/ |
| 2420 | static void |
| 2421 | x86emuOp_lahf(struct X86EMU *emu) |
| 2422 | { |
| 2423 | emu->x86.R_AH = (uint8_t) (emu->x86.R_FLG & 0xff); |
| 2424 | /* undocumented TC++ behavior??? Nope. It's documented, but you have |
| 2425 | * too look real hard to notice it. */ |
| 2426 | emu->x86.R_AH |= 0x2; |
| 2427 | } |
| 2428 | /**************************************************************************** |
| 2429 | REMARKS: |
| 2430 | Handles opcode 0xa0 |
| 2431 | ****************************************************************************/ |
| 2432 | static void |
| 2433 | x86emuOp_mov_AL_M_IMM(struct X86EMU *emu) |
| 2434 | { |
| 2435 | uint16_t offset; |
| 2436 | |
| 2437 | offset = fetch_word_imm(emu); |
| 2438 | emu->x86.R_AL = fetch_data_byte(emu, offset); |
| 2439 | } |
| 2440 | /**************************************************************************** |
| 2441 | REMARKS: |
| 2442 | Handles opcode 0xa1 |
| 2443 | ****************************************************************************/ |
| 2444 | static void |
| 2445 | x86emuOp_mov_AX_M_IMM(struct X86EMU *emu) |
| 2446 | { |
| 2447 | uint16_t offset; |
| 2448 | |
| 2449 | offset = fetch_word_imm(emu); |
| 2450 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2451 | emu->x86.R_EAX = fetch_data_long(emu, offset); |
| 2452 | } else { |
| 2453 | emu->x86.R_AX = fetch_data_word(emu, offset); |
| 2454 | } |
| 2455 | } |
| 2456 | /**************************************************************************** |
| 2457 | REMARKS: |
| 2458 | Handles opcode 0xa2 |
| 2459 | ****************************************************************************/ |
| 2460 | static void |
| 2461 | x86emuOp_mov_M_AL_IMM(struct X86EMU *emu) |
| 2462 | { |
| 2463 | uint16_t offset; |
| 2464 | |
| 2465 | offset = fetch_word_imm(emu); |
| 2466 | store_data_byte(emu, offset, emu->x86.R_AL); |
| 2467 | } |
| 2468 | /**************************************************************************** |
| 2469 | REMARKS: |
| 2470 | Handles opcode 0xa3 |
| 2471 | ****************************************************************************/ |
| 2472 | static void |
| 2473 | x86emuOp_mov_M_AX_IMM(struct X86EMU *emu) |
| 2474 | { |
| 2475 | uint16_t offset; |
| 2476 | |
| 2477 | offset = fetch_word_imm(emu); |
| 2478 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2479 | store_data_long(emu, offset, emu->x86.R_EAX); |
| 2480 | } else { |
| 2481 | store_data_word(emu, offset, emu->x86.R_AX); |
| 2482 | } |
| 2483 | } |
| 2484 | /**************************************************************************** |
| 2485 | REMARKS: |
| 2486 | Handles opcode 0xa4 |
| 2487 | ****************************************************************************/ |
| 2488 | static void |
| 2489 | x86emuOp_movs_byte(struct X86EMU *emu) |
| 2490 | { |
| 2491 | uint8_t val; |
| 2492 | uint32_t count; |
| 2493 | int inc; |
| 2494 | |
| 2495 | if (ACCESS_FLAG(F_DF)) /* down */ |
| 2496 | inc = -1; |
| 2497 | else |
| 2498 | inc = 1; |
| 2499 | count = 1; |
| 2500 | if (emu->x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) { |
| 2501 | /* dont care whether REPE or REPNE */ |
| 2502 | /* move them until CX is ZERO. */ |
| 2503 | count = emu->x86.R_CX; |
| 2504 | emu->x86.R_CX = 0; |
| 2505 | emu->x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE); |
| 2506 | } |
| 2507 | while (count--) { |
| 2508 | val = fetch_data_byte(emu, emu->x86.R_SI); |
| 2509 | store_byte(emu, emu->x86.R_ES, emu->x86.R_DI, val); |
| 2510 | emu->x86.R_SI += inc; |
| 2511 | emu->x86.R_DI += inc; |
| 2512 | } |
| 2513 | } |
| 2514 | /**************************************************************************** |
| 2515 | REMARKS: |
| 2516 | Handles opcode 0xa5 |
| 2517 | ****************************************************************************/ |
| 2518 | static void |
| 2519 | x86emuOp_movs_word(struct X86EMU *emu) |
| 2520 | { |
| 2521 | uint32_t val; |
| 2522 | int inc; |
| 2523 | uint32_t count; |
| 2524 | |
| 2525 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 2526 | inc = 4; |
| 2527 | else |
| 2528 | inc = 2; |
| 2529 | |
| 2530 | if (ACCESS_FLAG(F_DF)) /* down */ |
| 2531 | inc = -inc; |
| 2532 | |
| 2533 | count = 1; |
| 2534 | if (emu->x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) { |
| 2535 | /* dont care whether REPE or REPNE */ |
| 2536 | /* move them until CX is ZERO. */ |
| 2537 | count = emu->x86.R_CX; |
| 2538 | emu->x86.R_CX = 0; |
| 2539 | emu->x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE); |
| 2540 | } |
| 2541 | while (count--) { |
| 2542 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2543 | val = fetch_data_long(emu, emu->x86.R_SI); |
| 2544 | store_long(emu, emu->x86.R_ES, emu->x86.R_DI, val); |
| 2545 | } else { |
| 2546 | val = fetch_data_word(emu, emu->x86.R_SI); |
| 2547 | store_word(emu, emu->x86.R_ES, emu->x86.R_DI, (uint16_t) val); |
| 2548 | } |
| 2549 | emu->x86.R_SI += inc; |
| 2550 | emu->x86.R_DI += inc; |
| 2551 | } |
| 2552 | } |
| 2553 | /**************************************************************************** |
| 2554 | REMARKS: |
| 2555 | Handles opcode 0xa6 |
| 2556 | ****************************************************************************/ |
| 2557 | static void |
| 2558 | x86emuOp_cmps_byte(struct X86EMU *emu) |
| 2559 | { |
| 2560 | int8_t val1, val2; |
| 2561 | int inc; |
| 2562 | |
| 2563 | if (ACCESS_FLAG(F_DF)) /* down */ |
| 2564 | inc = -1; |
| 2565 | else |
| 2566 | inc = 1; |
| 2567 | |
| 2568 | if (emu->x86.mode & SYSMODE_PREFIX_REPE) { |
| 2569 | /* REPE */ |
| 2570 | /* move them until CX is ZERO. */ |
| 2571 | while (emu->x86.R_CX != 0) { |
| 2572 | val1 = fetch_data_byte(emu, emu->x86.R_SI); |
| 2573 | val2 = fetch_byte(emu, emu->x86.R_ES, emu->x86.R_DI); |
| 2574 | cmp_byte(emu, val1, val2); |
| 2575 | emu->x86.R_CX -= 1; |
| 2576 | emu->x86.R_SI += inc; |
| 2577 | emu->x86.R_DI += inc; |
| 2578 | if (ACCESS_FLAG(F_ZF) == 0) |
| 2579 | break; |
| 2580 | } |
| 2581 | emu->x86.mode &= ~SYSMODE_PREFIX_REPE; |
| 2582 | } else if (emu->x86.mode & SYSMODE_PREFIX_REPNE) { |
| 2583 | /* REPNE */ |
| 2584 | /* move them until CX is ZERO. */ |
| 2585 | while (emu->x86.R_CX != 0) { |
| 2586 | val1 = fetch_data_byte(emu, emu->x86.R_SI); |
| 2587 | val2 = fetch_byte(emu, emu->x86.R_ES, emu->x86.R_DI); |
| 2588 | cmp_byte(emu, val1, val2); |
| 2589 | emu->x86.R_CX -= 1; |
| 2590 | emu->x86.R_SI += inc; |
| 2591 | emu->x86.R_DI += inc; |
| 2592 | if (ACCESS_FLAG(F_ZF)) |
| 2593 | break; /* zero flag set means equal */ |
| 2594 | } |
| 2595 | emu->x86.mode &= ~SYSMODE_PREFIX_REPNE; |
| 2596 | } else { |
| 2597 | val1 = fetch_data_byte(emu, emu->x86.R_SI); |
| 2598 | val2 = fetch_byte(emu, emu->x86.R_ES, emu->x86.R_DI); |
| 2599 | cmp_byte(emu, val1, val2); |
| 2600 | emu->x86.R_SI += inc; |
| 2601 | emu->x86.R_DI += inc; |
| 2602 | } |
| 2603 | } |
| 2604 | /**************************************************************************** |
| 2605 | REMARKS: |
| 2606 | Handles opcode 0xa7 |
| 2607 | ****************************************************************************/ |
| 2608 | static void |
| 2609 | x86emuOp_cmps_word(struct X86EMU *emu) |
| 2610 | { |
| 2611 | uint32_t val1, val2; |
| 2612 | int inc; |
| 2613 | |
| 2614 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2615 | if (ACCESS_FLAG(F_DF)) /* down */ |
| 2616 | inc = -4; |
| 2617 | else |
| 2618 | inc = 4; |
| 2619 | } else { |
| 2620 | if (ACCESS_FLAG(F_DF)) /* down */ |
| 2621 | inc = -2; |
| 2622 | else |
| 2623 | inc = 2; |
| 2624 | } |
| 2625 | if (emu->x86.mode & SYSMODE_PREFIX_REPE) { |
| 2626 | /* REPE */ |
| 2627 | /* move them until CX is ZERO. */ |
| 2628 | while (emu->x86.R_CX != 0) { |
| 2629 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2630 | val1 = fetch_data_long(emu, emu->x86.R_SI); |
| 2631 | val2 = fetch_long(emu, emu->x86.R_ES, emu->x86.R_DI); |
| 2632 | cmp_long(emu, val1, val2); |
| 2633 | } else { |
| 2634 | val1 = fetch_data_word(emu, emu->x86.R_SI); |
| 2635 | val2 = fetch_word(emu, emu->x86.R_ES, emu->x86.R_DI); |
| 2636 | cmp_word(emu, (uint16_t) val1, (uint16_t) val2); |
| 2637 | } |
| 2638 | emu->x86.R_CX -= 1; |
| 2639 | emu->x86.R_SI += inc; |
| 2640 | emu->x86.R_DI += inc; |
| 2641 | if (ACCESS_FLAG(F_ZF) == 0) |
| 2642 | break; |
| 2643 | } |
| 2644 | emu->x86.mode &= ~SYSMODE_PREFIX_REPE; |
| 2645 | } else if (emu->x86.mode & SYSMODE_PREFIX_REPNE) { |
| 2646 | /* REPNE */ |
| 2647 | /* move them until CX is ZERO. */ |
| 2648 | while (emu->x86.R_CX != 0) { |
| 2649 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2650 | val1 = fetch_data_long(emu, emu->x86.R_SI); |
| 2651 | val2 = fetch_long(emu, emu->x86.R_ES, emu->x86.R_DI); |
| 2652 | cmp_long(emu, val1, val2); |
| 2653 | } else { |
| 2654 | val1 = fetch_data_word(emu, emu->x86.R_SI); |
| 2655 | val2 = fetch_word(emu, emu->x86.R_ES, emu->x86.R_DI); |
| 2656 | cmp_word(emu, (uint16_t) val1, (uint16_t) val2); |
| 2657 | } |
| 2658 | emu->x86.R_CX -= 1; |
| 2659 | emu->x86.R_SI += inc; |
| 2660 | emu->x86.R_DI += inc; |
| 2661 | if (ACCESS_FLAG(F_ZF)) |
| 2662 | break; /* zero flag set means equal */ |
| 2663 | } |
| 2664 | emu->x86.mode &= ~SYSMODE_PREFIX_REPNE; |
| 2665 | } else { |
| 2666 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2667 | val1 = fetch_data_long(emu, emu->x86.R_SI); |
| 2668 | val2 = fetch_long(emu, emu->x86.R_ES, emu->x86.R_DI); |
| 2669 | cmp_long(emu, val1, val2); |
| 2670 | } else { |
| 2671 | val1 = fetch_data_word(emu, emu->x86.R_SI); |
| 2672 | val2 = fetch_word(emu, emu->x86.R_ES, emu->x86.R_DI); |
| 2673 | cmp_word(emu, (uint16_t) val1, (uint16_t) val2); |
| 2674 | } |
| 2675 | emu->x86.R_SI += inc; |
| 2676 | emu->x86.R_DI += inc; |
| 2677 | } |
| 2678 | } |
| 2679 | /**************************************************************************** |
| 2680 | REMARKS: |
| 2681 | Handles opcode 0xa9 |
| 2682 | ****************************************************************************/ |
| 2683 | static void |
| 2684 | x86emuOp_test_AX_IMM(struct X86EMU *emu) |
| 2685 | { |
| 2686 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2687 | test_long(emu, emu->x86.R_EAX, fetch_long_imm(emu)); |
| 2688 | } else { |
| 2689 | test_word(emu, emu->x86.R_AX, fetch_word_imm(emu)); |
| 2690 | } |
| 2691 | } |
| 2692 | /**************************************************************************** |
| 2693 | REMARKS: |
| 2694 | Handles opcode 0xaa |
| 2695 | ****************************************************************************/ |
| 2696 | static void |
| 2697 | x86emuOp_stos_byte(struct X86EMU *emu) |
| 2698 | { |
| 2699 | int inc; |
| 2700 | |
| 2701 | if (ACCESS_FLAG(F_DF)) /* down */ |
| 2702 | inc = -1; |
| 2703 | else |
| 2704 | inc = 1; |
| 2705 | if (emu->x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) { |
| 2706 | /* dont care whether REPE or REPNE */ |
| 2707 | /* move them until CX is ZERO. */ |
| 2708 | while (emu->x86.R_CX != 0) { |
| 2709 | store_byte(emu, emu->x86.R_ES, emu->x86.R_DI, emu->x86.R_AL); |
| 2710 | emu->x86.R_CX -= 1; |
| 2711 | emu->x86.R_DI += inc; |
| 2712 | } |
| 2713 | emu->x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE); |
| 2714 | } else { |
| 2715 | store_byte(emu, emu->x86.R_ES, emu->x86.R_DI, emu->x86.R_AL); |
| 2716 | emu->x86.R_DI += inc; |
| 2717 | } |
| 2718 | } |
| 2719 | /**************************************************************************** |
| 2720 | REMARKS: |
| 2721 | Handles opcode 0xab |
| 2722 | ****************************************************************************/ |
| 2723 | static void |
| 2724 | x86emuOp_stos_word(struct X86EMU *emu) |
| 2725 | { |
| 2726 | int inc; |
| 2727 | uint32_t count; |
| 2728 | |
| 2729 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 2730 | inc = 4; |
| 2731 | else |
| 2732 | inc = 2; |
| 2733 | |
| 2734 | if (ACCESS_FLAG(F_DF)) /* down */ |
| 2735 | inc = -inc; |
| 2736 | |
| 2737 | count = 1; |
| 2738 | if (emu->x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) { |
| 2739 | /* dont care whether REPE or REPNE */ |
| 2740 | /* move them until CX is ZERO. */ |
| 2741 | count = emu->x86.R_CX; |
| 2742 | emu->x86.R_CX = 0; |
| 2743 | emu->x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE); |
| 2744 | } |
| 2745 | while (count--) { |
| 2746 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2747 | store_long(emu, emu->x86.R_ES, emu->x86.R_DI, emu->x86.R_EAX); |
| 2748 | } else { |
| 2749 | store_word(emu, emu->x86.R_ES, emu->x86.R_DI, emu->x86.R_AX); |
| 2750 | } |
| 2751 | emu->x86.R_DI += inc; |
| 2752 | } |
| 2753 | } |
| 2754 | /**************************************************************************** |
| 2755 | REMARKS: |
| 2756 | Handles opcode 0xac |
| 2757 | ****************************************************************************/ |
| 2758 | static void |
| 2759 | x86emuOp_lods_byte(struct X86EMU *emu) |
| 2760 | { |
| 2761 | int inc; |
| 2762 | |
| 2763 | if (ACCESS_FLAG(F_DF)) /* down */ |
| 2764 | inc = -1; |
| 2765 | else |
| 2766 | inc = 1; |
| 2767 | if (emu->x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) { |
| 2768 | /* dont care whether REPE or REPNE */ |
| 2769 | /* move them until CX is ZERO. */ |
| 2770 | while (emu->x86.R_CX != 0) { |
| 2771 | emu->x86.R_AL = fetch_data_byte(emu, emu->x86.R_SI); |
| 2772 | emu->x86.R_CX -= 1; |
| 2773 | emu->x86.R_SI += inc; |
| 2774 | } |
| 2775 | emu->x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE); |
| 2776 | } else { |
| 2777 | emu->x86.R_AL = fetch_data_byte(emu, emu->x86.R_SI); |
| 2778 | emu->x86.R_SI += inc; |
| 2779 | } |
| 2780 | } |
| 2781 | /**************************************************************************** |
| 2782 | REMARKS: |
| 2783 | Handles opcode 0xad |
| 2784 | ****************************************************************************/ |
| 2785 | static void |
| 2786 | x86emuOp_lods_word(struct X86EMU *emu) |
| 2787 | { |
| 2788 | int inc; |
| 2789 | uint32_t count; |
| 2790 | |
| 2791 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 2792 | inc = 4; |
| 2793 | else |
| 2794 | inc = 2; |
| 2795 | |
| 2796 | if (ACCESS_FLAG(F_DF)) /* down */ |
| 2797 | inc = -inc; |
| 2798 | |
| 2799 | count = 1; |
| 2800 | if (emu->x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) { |
| 2801 | /* dont care whether REPE or REPNE */ |
| 2802 | /* move them until CX is ZERO. */ |
| 2803 | count = emu->x86.R_CX; |
| 2804 | emu->x86.R_CX = 0; |
| 2805 | emu->x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE); |
| 2806 | } |
| 2807 | while (count--) { |
| 2808 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2809 | emu->x86.R_EAX = fetch_data_long(emu, emu->x86.R_SI); |
| 2810 | } else { |
| 2811 | emu->x86.R_AX = fetch_data_word(emu, emu->x86.R_SI); |
| 2812 | } |
| 2813 | emu->x86.R_SI += inc; |
| 2814 | } |
| 2815 | } |
| 2816 | /**************************************************************************** |
| 2817 | REMARKS: |
| 2818 | Handles opcode 0xae |
| 2819 | ****************************************************************************/ |
| 2820 | static void |
| 2821 | x86emuOp_scas_byte(struct X86EMU *emu) |
| 2822 | { |
| 2823 | int8_t val2; |
| 2824 | int inc; |
| 2825 | |
| 2826 | if (ACCESS_FLAG(F_DF)) /* down */ |
| 2827 | inc = -1; |
| 2828 | else |
| 2829 | inc = 1; |
| 2830 | if (emu->x86.mode & SYSMODE_PREFIX_REPE) { |
| 2831 | /* REPE */ |
| 2832 | /* move them until CX is ZERO. */ |
| 2833 | while (emu->x86.R_CX != 0) { |
| 2834 | val2 = fetch_byte(emu, emu->x86.R_ES, emu->x86.R_DI); |
| 2835 | cmp_byte(emu, emu->x86.R_AL, val2); |
| 2836 | emu->x86.R_CX -= 1; |
| 2837 | emu->x86.R_DI += inc; |
| 2838 | if (ACCESS_FLAG(F_ZF) == 0) |
| 2839 | break; |
| 2840 | } |
| 2841 | emu->x86.mode &= ~SYSMODE_PREFIX_REPE; |
| 2842 | } else if (emu->x86.mode & SYSMODE_PREFIX_REPNE) { |
| 2843 | /* REPNE */ |
| 2844 | /* move them until CX is ZERO. */ |
| 2845 | while (emu->x86.R_CX != 0) { |
| 2846 | val2 = fetch_byte(emu, emu->x86.R_ES, emu->x86.R_DI); |
| 2847 | cmp_byte(emu, emu->x86.R_AL, val2); |
| 2848 | emu->x86.R_CX -= 1; |
| 2849 | emu->x86.R_DI += inc; |
| 2850 | if (ACCESS_FLAG(F_ZF)) |
| 2851 | break; /* zero flag set means equal */ |
| 2852 | } |
| 2853 | emu->x86.mode &= ~SYSMODE_PREFIX_REPNE; |
| 2854 | } else { |
| 2855 | val2 = fetch_byte(emu, emu->x86.R_ES, emu->x86.R_DI); |
| 2856 | cmp_byte(emu, emu->x86.R_AL, val2); |
| 2857 | emu->x86.R_DI += inc; |
| 2858 | } |
| 2859 | } |
| 2860 | /**************************************************************************** |
| 2861 | REMARKS: |
| 2862 | Handles opcode 0xaf |
| 2863 | ****************************************************************************/ |
| 2864 | static void |
| 2865 | x86emuOp_scas_word(struct X86EMU *emu) |
| 2866 | { |
| 2867 | int inc; |
| 2868 | uint32_t val; |
| 2869 | |
| 2870 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 2871 | inc = 4; |
| 2872 | else |
| 2873 | inc = 2; |
| 2874 | |
| 2875 | if (ACCESS_FLAG(F_DF)) /* down */ |
| 2876 | inc = -inc; |
| 2877 | |
| 2878 | if (emu->x86.mode & SYSMODE_PREFIX_REPE) { |
| 2879 | /* REPE */ |
| 2880 | /* move them until CX is ZERO. */ |
| 2881 | while (emu->x86.R_CX != 0) { |
| 2882 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2883 | val = fetch_long(emu, emu->x86.R_ES, emu->x86.R_DI); |
| 2884 | cmp_long(emu, emu->x86.R_EAX, val); |
| 2885 | } else { |
| 2886 | val = fetch_word(emu, emu->x86.R_ES, emu->x86.R_DI); |
| 2887 | cmp_word(emu, emu->x86.R_AX, (uint16_t) val); |
| 2888 | } |
| 2889 | emu->x86.R_CX -= 1; |
| 2890 | emu->x86.R_DI += inc; |
| 2891 | if (ACCESS_FLAG(F_ZF) == 0) |
| 2892 | break; |
| 2893 | } |
| 2894 | emu->x86.mode &= ~SYSMODE_PREFIX_REPE; |
| 2895 | } else if (emu->x86.mode & SYSMODE_PREFIX_REPNE) { |
| 2896 | /* REPNE */ |
| 2897 | /* move them until CX is ZERO. */ |
| 2898 | while (emu->x86.R_CX != 0) { |
| 2899 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2900 | val = fetch_long(emu, emu->x86.R_ES, emu->x86.R_DI); |
| 2901 | cmp_long(emu, emu->x86.R_EAX, val); |
| 2902 | } else { |
| 2903 | val = fetch_word(emu, emu->x86.R_ES, emu->x86.R_DI); |
| 2904 | cmp_word(emu, emu->x86.R_AX, (uint16_t) val); |
| 2905 | } |
| 2906 | emu->x86.R_CX -= 1; |
| 2907 | emu->x86.R_DI += inc; |
| 2908 | if (ACCESS_FLAG(F_ZF)) |
| 2909 | break; /* zero flag set means equal */ |
| 2910 | } |
| 2911 | emu->x86.mode &= ~SYSMODE_PREFIX_REPNE; |
| 2912 | } else { |
| 2913 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 2914 | val = fetch_long(emu, emu->x86.R_ES, emu->x86.R_DI); |
| 2915 | cmp_long(emu, emu->x86.R_EAX, val); |
| 2916 | } else { |
| 2917 | val = fetch_word(emu, emu->x86.R_ES, emu->x86.R_DI); |
| 2918 | cmp_word(emu, emu->x86.R_AX, (uint16_t) val); |
| 2919 | } |
| 2920 | emu->x86.R_DI += inc; |
| 2921 | } |
| 2922 | } |
| 2923 | /**************************************************************************** |
| 2924 | REMARKS: |
| 2925 | Handles opcode 0xb8 |
| 2926 | ****************************************************************************/ |
| 2927 | static void |
| 2928 | x86emuOp_mov_word_AX_IMM(struct X86EMU *emu) |
| 2929 | { |
| 2930 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 2931 | emu->x86.R_EAX = fetch_long_imm(emu); |
| 2932 | else |
| 2933 | emu->x86.R_AX = fetch_word_imm(emu); |
| 2934 | } |
| 2935 | /**************************************************************************** |
| 2936 | REMARKS: |
| 2937 | Handles opcode 0xb9 |
| 2938 | ****************************************************************************/ |
| 2939 | static void |
| 2940 | x86emuOp_mov_word_CX_IMM(struct X86EMU *emu) |
| 2941 | { |
| 2942 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 2943 | emu->x86.R_ECX = fetch_long_imm(emu); |
| 2944 | else |
| 2945 | emu->x86.R_CX = fetch_word_imm(emu); |
| 2946 | } |
| 2947 | /**************************************************************************** |
| 2948 | REMARKS: |
| 2949 | Handles opcode 0xba |
| 2950 | ****************************************************************************/ |
| 2951 | static void |
| 2952 | x86emuOp_mov_word_DX_IMM(struct X86EMU *emu) |
| 2953 | { |
| 2954 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 2955 | emu->x86.R_EDX = fetch_long_imm(emu); |
| 2956 | else |
| 2957 | emu->x86.R_DX = fetch_word_imm(emu); |
| 2958 | } |
| 2959 | /**************************************************************************** |
| 2960 | REMARKS: |
| 2961 | Handles opcode 0xbb |
| 2962 | ****************************************************************************/ |
| 2963 | static void |
| 2964 | x86emuOp_mov_word_BX_IMM(struct X86EMU *emu) |
| 2965 | { |
| 2966 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 2967 | emu->x86.R_EBX = fetch_long_imm(emu); |
| 2968 | else |
| 2969 | emu->x86.R_BX = fetch_word_imm(emu); |
| 2970 | } |
| 2971 | /**************************************************************************** |
| 2972 | REMARKS: |
| 2973 | Handles opcode 0xbc |
| 2974 | ****************************************************************************/ |
| 2975 | static void |
| 2976 | x86emuOp_mov_word_SP_IMM(struct X86EMU *emu) |
| 2977 | { |
| 2978 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 2979 | emu->x86.R_ESP = fetch_long_imm(emu); |
| 2980 | else |
| 2981 | emu->x86.R_SP = fetch_word_imm(emu); |
| 2982 | } |
| 2983 | /**************************************************************************** |
| 2984 | REMARKS: |
| 2985 | Handles opcode 0xbd |
| 2986 | ****************************************************************************/ |
| 2987 | static void |
| 2988 | x86emuOp_mov_word_BP_IMM(struct X86EMU *emu) |
| 2989 | { |
| 2990 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 2991 | emu->x86.R_EBP = fetch_long_imm(emu); |
| 2992 | else |
| 2993 | emu->x86.R_BP = fetch_word_imm(emu); |
| 2994 | } |
| 2995 | /**************************************************************************** |
| 2996 | REMARKS: |
| 2997 | Handles opcode 0xbe |
| 2998 | ****************************************************************************/ |
| 2999 | static void |
| 3000 | x86emuOp_mov_word_SI_IMM(struct X86EMU *emu) |
| 3001 | { |
| 3002 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 3003 | emu->x86.R_ESI = fetch_long_imm(emu); |
| 3004 | else |
| 3005 | emu->x86.R_SI = fetch_word_imm(emu); |
| 3006 | } |
| 3007 | /**************************************************************************** |
| 3008 | REMARKS: |
| 3009 | Handles opcode 0xbf |
| 3010 | ****************************************************************************/ |
| 3011 | static void |
| 3012 | x86emuOp_mov_word_DI_IMM(struct X86EMU *emu) |
| 3013 | { |
| 3014 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 3015 | emu->x86.R_EDI = fetch_long_imm(emu); |
| 3016 | else |
| 3017 | emu->x86.R_DI = fetch_word_imm(emu); |
| 3018 | } |
| 3019 | /* used by opcodes c0, d0, and d2. */ |
| 3020 | static |
| 3021 | uint8_t(* const opcD0_byte_operation[]) (struct X86EMU *, uint8_t d, uint8_t s) = |
| 3022 | { |
| 3023 | rol_byte, |
| 3024 | ror_byte, |
| 3025 | rcl_byte, |
| 3026 | rcr_byte, |
| 3027 | shl_byte, |
| 3028 | shr_byte, |
| 3029 | shl_byte, /* sal_byte === shl_byte by definition */ |
| 3030 | sar_byte, |
| 3031 | }; |
| 3032 | /**************************************************************************** |
| 3033 | REMARKS: |
| 3034 | Handles opcode 0xc0 |
| 3035 | ****************************************************************************/ |
| 3036 | static void |
| 3037 | x86emuOp_opcC0_byte_RM_MEM(struct X86EMU *emu) |
| 3038 | { |
| 3039 | uint8_t destval, amt; |
| 3040 | |
| 3041 | /* |
| 3042 | * Yet another weirdo special case instruction format. Part of |
| 3043 | * the opcode held below in "RH". Doubly nested case would |
| 3044 | * result, except that the decoded instruction |
| 3045 | */ |
| 3046 | fetch_decode_modrm(emu); |
| 3047 | /* know operation, decode the mod byte to find the addressing mode. */ |
| 3048 | destval = decode_and_fetch_byte_imm8(emu, &amt); |
| 3049 | destval = (*opcD0_byte_operation[emu->cur_rh]) (emu, destval, amt); |
| 3050 | write_back_byte(emu, destval); |
| 3051 | } |
| 3052 | /* used by opcodes c1, d1, and d3. */ |
| 3053 | static |
| 3054 | uint16_t(* const opcD1_word_operation[]) (struct X86EMU *, uint16_t s, uint8_t d) = |
| 3055 | { |
| 3056 | rol_word, |
| 3057 | ror_word, |
| 3058 | rcl_word, |
| 3059 | rcr_word, |
| 3060 | shl_word, |
| 3061 | shr_word, |
| 3062 | shl_word, /* sal_byte === shl_byte by definition */ |
| 3063 | sar_word, |
| 3064 | }; |
| 3065 | /* used by opcodes c1, d1, and d3. */ |
| 3066 | static |
| 3067 | uint32_t(* const opcD1_long_operation[]) (struct X86EMU *, uint32_t s, uint8_t d) = |
| 3068 | { |
| 3069 | rol_long, |
| 3070 | ror_long, |
| 3071 | rcl_long, |
| 3072 | rcr_long, |
| 3073 | shl_long, |
| 3074 | shr_long, |
| 3075 | shl_long, /* sal_byte === shl_byte by definition */ |
| 3076 | sar_long, |
| 3077 | }; |
| 3078 | /**************************************************************************** |
| 3079 | REMARKS: |
| 3080 | Handles opcode 0xc1 |
| 3081 | ****************************************************************************/ |
| 3082 | static void |
| 3083 | x86emuOp_opcC1_word_RM_MEM(struct X86EMU *emu) |
| 3084 | { |
| 3085 | uint8_t amt; |
| 3086 | |
| 3087 | /* |
| 3088 | * Yet another weirdo special case instruction format. Part of |
| 3089 | * the opcode held below in "RH". Doubly nested case would |
| 3090 | * result, except that the decoded instruction |
| 3091 | */ |
| 3092 | fetch_decode_modrm(emu); |
| 3093 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 3094 | uint32_t destval; |
| 3095 | |
| 3096 | destval = decode_and_fetch_long_imm8(emu, &amt); |
| 3097 | destval = (*opcD1_long_operation[emu->cur_rh]) (emu, destval, amt); |
| 3098 | write_back_long(emu, destval); |
| 3099 | } else { |
| 3100 | uint16_t destval; |
| 3101 | |
| 3102 | destval = decode_and_fetch_word_imm8(emu, &amt); |
| 3103 | destval = (*opcD1_word_operation[emu->cur_rh]) (emu, destval, amt); |
| 3104 | write_back_word(emu, destval); |
| 3105 | } |
| 3106 | } |
| 3107 | /**************************************************************************** |
| 3108 | REMARKS: |
| 3109 | Handles opcode 0xc2 |
| 3110 | ****************************************************************************/ |
| 3111 | static void |
| 3112 | x86emuOp_ret_near_IMM(struct X86EMU *emu) |
| 3113 | { |
| 3114 | uint16_t imm; |
| 3115 | |
| 3116 | imm = fetch_word_imm(emu); |
| 3117 | emu->x86.R_IP = pop_word(emu); |
| 3118 | emu->x86.R_SP += imm; |
| 3119 | } |
| 3120 | /**************************************************************************** |
| 3121 | REMARKS: |
| 3122 | Handles opcode 0xc6 |
| 3123 | ****************************************************************************/ |
| 3124 | static void |
| 3125 | x86emuOp_mov_byte_RM_IMM(struct X86EMU *emu) |
| 3126 | { |
| 3127 | uint8_t *destreg; |
| 3128 | uint32_t destoffset; |
| 3129 | uint8_t imm; |
| 3130 | |
| 3131 | fetch_decode_modrm(emu); |
| 3132 | if (emu->cur_rh != 0) |
| 3133 | X86EMU_halt_sys(emu); |
| 3134 | if (emu->cur_mod != 3) { |
| 3135 | destoffset = decode_rl_address(emu); |
| 3136 | imm = fetch_byte_imm(emu); |
| 3137 | store_data_byte(emu, destoffset, imm); |
| 3138 | } else { |
| 3139 | destreg = decode_rl_byte_register(emu); |
| 3140 | imm = fetch_byte_imm(emu); |
| 3141 | *destreg = imm; |
| 3142 | } |
| 3143 | } |
| 3144 | /**************************************************************************** |
| 3145 | REMARKS: |
| 3146 | Handles opcode 0xc7 |
| 3147 | ****************************************************************************/ |
| 3148 | static void |
| 3149 | x86emuOp32_mov_word_RM_IMM(struct X86EMU *emu) |
| 3150 | { |
| 3151 | uint32_t destoffset; |
| 3152 | uint32_t imm, *destreg; |
| 3153 | |
| 3154 | fetch_decode_modrm(emu); |
| 3155 | if (emu->cur_rh != 0) |
| 3156 | X86EMU_halt_sys(emu); |
| 3157 | |
| 3158 | if (emu->cur_mod != 3) { |
| 3159 | destoffset = decode_rl_address(emu); |
| 3160 | imm = fetch_long_imm(emu); |
| 3161 | store_data_long(emu, destoffset, imm); |
| 3162 | } else { |
| 3163 | destreg = decode_rl_long_register(emu); |
| 3164 | imm = fetch_long_imm(emu); |
| 3165 | *destreg = imm; |
| 3166 | } |
| 3167 | } |
| 3168 | |
| 3169 | static void |
| 3170 | x86emuOp16_mov_word_RM_IMM(struct X86EMU *emu) |
| 3171 | { |
| 3172 | uint32_t destoffset; |
| 3173 | uint16_t imm, *destreg; |
| 3174 | |
| 3175 | fetch_decode_modrm(emu); |
| 3176 | if (emu->cur_rh != 0) |
| 3177 | X86EMU_halt_sys(emu); |
| 3178 | |
| 3179 | if (emu->cur_mod != 3) { |
| 3180 | destoffset = decode_rl_address(emu); |
| 3181 | imm = fetch_word_imm(emu); |
| 3182 | store_data_word(emu, destoffset, imm); |
| 3183 | } else { |
| 3184 | destreg = decode_rl_word_register(emu); |
| 3185 | imm = fetch_word_imm(emu); |
| 3186 | *destreg = imm; |
| 3187 | } |
| 3188 | } |
| 3189 | |
| 3190 | static void |
| 3191 | x86emuOp_mov_word_RM_IMM(struct X86EMU *emu) |
| 3192 | { |
| 3193 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 3194 | x86emuOp32_mov_word_RM_IMM(emu); |
| 3195 | else |
| 3196 | x86emuOp16_mov_word_RM_IMM(emu); |
| 3197 | } |
| 3198 | /**************************************************************************** |
| 3199 | REMARKS: |
| 3200 | Handles opcode 0xc8 |
| 3201 | ****************************************************************************/ |
| 3202 | static void |
| 3203 | x86emuOp_enter(struct X86EMU *emu) |
| 3204 | { |
| 3205 | uint16_t local, frame_pointer; |
| 3206 | uint8_t nesting; |
| 3207 | int i; |
| 3208 | |
| 3209 | local = fetch_word_imm(emu); |
| 3210 | nesting = fetch_byte_imm(emu); |
| 3211 | push_word(emu, emu->x86.R_BP); |
| 3212 | frame_pointer = emu->x86.R_SP; |
| 3213 | if (nesting > 0) { |
| 3214 | for (i = 1; i < nesting; i++) { |
| 3215 | emu->x86.R_BP -= 2; |
| 3216 | push_word(emu, fetch_word(emu, emu->x86.R_SS, emu->x86.R_BP)); |
| 3217 | } |
| 3218 | push_word(emu, frame_pointer); |
| 3219 | } |
| 3220 | emu->x86.R_BP = frame_pointer; |
| 3221 | emu->x86.R_SP = (uint16_t) (emu->x86.R_SP - local); |
| 3222 | } |
| 3223 | /**************************************************************************** |
| 3224 | REMARKS: |
| 3225 | Handles opcode 0xc9 |
| 3226 | ****************************************************************************/ |
| 3227 | static void |
| 3228 | x86emuOp_leave(struct X86EMU *emu) |
| 3229 | { |
| 3230 | emu->x86.R_SP = emu->x86.R_BP; |
| 3231 | emu->x86.R_BP = pop_word(emu); |
| 3232 | } |
| 3233 | /**************************************************************************** |
| 3234 | REMARKS: |
| 3235 | Handles opcode 0xca |
| 3236 | ****************************************************************************/ |
| 3237 | static void |
| 3238 | x86emuOp_ret_far_IMM(struct X86EMU *emu) |
| 3239 | { |
| 3240 | uint16_t imm; |
| 3241 | |
| 3242 | imm = fetch_word_imm(emu); |
| 3243 | emu->x86.R_IP = pop_word(emu); |
| 3244 | emu->x86.R_CS = pop_word(emu); |
| 3245 | emu->x86.R_SP += imm; |
| 3246 | } |
| 3247 | /**************************************************************************** |
| 3248 | REMARKS: |
| 3249 | Handles opcode 0xcb |
| 3250 | ****************************************************************************/ |
| 3251 | static void |
| 3252 | x86emuOp_ret_far(struct X86EMU *emu) |
| 3253 | { |
| 3254 | emu->x86.R_IP = pop_word(emu); |
| 3255 | emu->x86.R_CS = pop_word(emu); |
| 3256 | } |
| 3257 | /**************************************************************************** |
| 3258 | REMARKS: |
| 3259 | Handles opcode 0xcc |
| 3260 | ****************************************************************************/ |
| 3261 | static void |
| 3262 | x86emuOp_int3(struct X86EMU *emu) |
| 3263 | { |
| 3264 | x86emu_intr_dispatch(emu, 3); |
| 3265 | } |
| 3266 | /**************************************************************************** |
| 3267 | REMARKS: |
| 3268 | Handles opcode 0xcd |
| 3269 | ****************************************************************************/ |
| 3270 | static void |
| 3271 | x86emuOp_int_IMM(struct X86EMU *emu) |
| 3272 | { |
| 3273 | uint8_t intnum; |
| 3274 | |
| 3275 | intnum = fetch_byte_imm(emu); |
| 3276 | x86emu_intr_dispatch(emu, intnum); |
| 3277 | } |
| 3278 | /**************************************************************************** |
| 3279 | REMARKS: |
| 3280 | Handles opcode 0xce |
| 3281 | ****************************************************************************/ |
| 3282 | static void |
| 3283 | x86emuOp_into(struct X86EMU *emu) |
| 3284 | { |
| 3285 | if (ACCESS_FLAG(F_OF)) |
| 3286 | x86emu_intr_dispatch(emu, 4); |
| 3287 | } |
| 3288 | /**************************************************************************** |
| 3289 | REMARKS: |
| 3290 | Handles opcode 0xcf |
| 3291 | ****************************************************************************/ |
| 3292 | static void |
| 3293 | x86emuOp_iret(struct X86EMU *emu) |
| 3294 | { |
| 3295 | emu->x86.R_IP = pop_word(emu); |
| 3296 | emu->x86.R_CS = pop_word(emu); |
| 3297 | emu->x86.R_FLG = pop_word(emu); |
| 3298 | } |
| 3299 | /**************************************************************************** |
| 3300 | REMARKS: |
| 3301 | Handles opcode 0xd0 |
| 3302 | ****************************************************************************/ |
| 3303 | static void |
| 3304 | x86emuOp_opcD0_byte_RM_1(struct X86EMU *emu) |
| 3305 | { |
| 3306 | uint8_t destval; |
| 3307 | |
| 3308 | fetch_decode_modrm(emu); |
| 3309 | destval = decode_and_fetch_byte(emu); |
| 3310 | destval = (*opcD0_byte_operation[emu->cur_rh]) (emu, destval, 1); |
| 3311 | write_back_byte(emu, destval); |
| 3312 | } |
| 3313 | /**************************************************************************** |
| 3314 | REMARKS: |
| 3315 | Handles opcode 0xd1 |
| 3316 | ****************************************************************************/ |
| 3317 | static void |
| 3318 | x86emuOp_opcD1_word_RM_1(struct X86EMU *emu) |
| 3319 | { |
| 3320 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 3321 | uint32_t destval; |
| 3322 | |
| 3323 | fetch_decode_modrm(emu); |
| 3324 | destval = decode_and_fetch_long(emu); |
| 3325 | destval = (*opcD1_long_operation[emu->cur_rh]) (emu, destval, 1); |
| 3326 | write_back_long(emu, destval); |
| 3327 | } else { |
| 3328 | uint16_t destval; |
| 3329 | |
| 3330 | fetch_decode_modrm(emu); |
| 3331 | destval = decode_and_fetch_word(emu); |
| 3332 | destval = (*opcD1_word_operation[emu->cur_rh]) (emu, destval, 1); |
| 3333 | write_back_word(emu, destval); |
| 3334 | } |
| 3335 | } |
| 3336 | /**************************************************************************** |
| 3337 | REMARKS: |
| 3338 | Handles opcode 0xd2 |
| 3339 | ****************************************************************************/ |
| 3340 | static void |
| 3341 | x86emuOp_opcD2_byte_RM_CL(struct X86EMU *emu) |
| 3342 | { |
| 3343 | uint8_t destval; |
| 3344 | |
| 3345 | fetch_decode_modrm(emu); |
| 3346 | destval = decode_and_fetch_byte(emu); |
| 3347 | destval = (*opcD0_byte_operation[emu->cur_rh]) (emu, destval, emu->x86.R_CL); |
| 3348 | write_back_byte(emu, destval); |
| 3349 | } |
| 3350 | /**************************************************************************** |
| 3351 | REMARKS: |
| 3352 | Handles opcode 0xd3 |
| 3353 | ****************************************************************************/ |
| 3354 | static void |
| 3355 | x86emuOp_opcD3_word_RM_CL(struct X86EMU *emu) |
| 3356 | { |
| 3357 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 3358 | uint32_t destval; |
| 3359 | |
| 3360 | fetch_decode_modrm(emu); |
| 3361 | destval = decode_and_fetch_long(emu); |
| 3362 | destval = (*opcD1_long_operation[emu->cur_rh]) (emu, destval, emu->x86.R_CL); |
| 3363 | write_back_long(emu, destval); |
| 3364 | } else { |
| 3365 | uint16_t destval; |
| 3366 | |
| 3367 | fetch_decode_modrm(emu); |
| 3368 | destval = decode_and_fetch_word(emu); |
| 3369 | destval = (*opcD1_word_operation[emu->cur_rh]) (emu, destval, emu->x86.R_CL); |
| 3370 | write_back_word(emu, destval); |
| 3371 | } |
| 3372 | } |
| 3373 | /**************************************************************************** |
| 3374 | REMARKS: |
| 3375 | Handles opcode 0xd4 |
| 3376 | ****************************************************************************/ |
| 3377 | static void |
| 3378 | x86emuOp_aam(struct X86EMU *emu) |
| 3379 | { |
| 3380 | uint8_t a; |
| 3381 | |
| 3382 | a = fetch_byte_imm(emu); /* this is a stupid encoding. */ |
| 3383 | if (a != 10) { |
| 3384 | /* fix: add base decoding aam_word(uint8_t val, int base a) */ |
| 3385 | X86EMU_halt_sys(emu); |
| 3386 | } |
| 3387 | /* note the type change here --- returning AL and AH in AX. */ |
| 3388 | emu->x86.R_AX = aam_word(emu, emu->x86.R_AL); |
| 3389 | } |
| 3390 | /**************************************************************************** |
| 3391 | REMARKS: |
| 3392 | Handles opcode 0xd5 |
| 3393 | ****************************************************************************/ |
| 3394 | static void |
| 3395 | x86emuOp_aad(struct X86EMU *emu) |
| 3396 | { |
| 3397 | uint8_t a; |
| 3398 | |
| 3399 | a = fetch_byte_imm(emu); |
| 3400 | if (a != 10) { |
| 3401 | /* fix: add base decoding aad_word(uint16_t val, int base a) */ |
| 3402 | X86EMU_halt_sys(emu); |
| 3403 | } |
| 3404 | emu->x86.R_AX = aad_word(emu, emu->x86.R_AX); |
| 3405 | } |
| 3406 | /* opcode 0xd6 ILLEGAL OPCODE */ |
| 3407 | |
| 3408 | /**************************************************************************** |
| 3409 | REMARKS: |
| 3410 | Handles opcode 0xd7 |
| 3411 | ****************************************************************************/ |
| 3412 | static void |
| 3413 | x86emuOp_xlat(struct X86EMU *emu) |
| 3414 | { |
| 3415 | uint16_t addr; |
| 3416 | |
| 3417 | addr = (uint16_t) (emu->x86.R_BX + (uint8_t) emu->x86.R_AL); |
| 3418 | emu->x86.R_AL = fetch_data_byte(emu, addr); |
| 3419 | } |
| 3420 | |
| 3421 | /* opcode=0xd8 */ |
| 3422 | static void |
| 3423 | x86emuOp_esc_coprocess_d8(struct X86EMU *emu) |
| 3424 | { |
| 3425 | } |
| 3426 | /* opcode=0xd9 */ |
| 3427 | static void |
| 3428 | x86emuOp_esc_coprocess_d9(struct X86EMU *emu) |
| 3429 | { |
| 3430 | fetch_decode_modrm(emu); |
| 3431 | if (emu->cur_mod != 3) |
| 3432 | decode_rl_address(emu); |
| 3433 | } |
| 3434 | /* opcode=0xda */ |
| 3435 | static void |
| 3436 | x86emuOp_esc_coprocess_da(struct X86EMU *emu) |
| 3437 | { |
| 3438 | fetch_decode_modrm(emu); |
| 3439 | if (emu->cur_mod != 3) |
| 3440 | decode_rl_address(emu); |
| 3441 | } |
| 3442 | /* opcode=0xdb */ |
| 3443 | static void |
| 3444 | x86emuOp_esc_coprocess_db(struct X86EMU *emu) |
| 3445 | { |
| 3446 | fetch_decode_modrm(emu); |
| 3447 | if (emu->cur_mod != 3) |
| 3448 | decode_rl_address(emu); |
| 3449 | } |
| 3450 | /* opcode=0xdc */ |
| 3451 | static void |
| 3452 | x86emuOp_esc_coprocess_dc(struct X86EMU *emu) |
| 3453 | { |
| 3454 | fetch_decode_modrm(emu); |
| 3455 | if (emu->cur_mod != 3) |
| 3456 | decode_rl_address(emu); |
| 3457 | } |
| 3458 | /* opcode=0xdd */ |
| 3459 | static void |
| 3460 | x86emuOp_esc_coprocess_dd(struct X86EMU *emu) |
| 3461 | { |
| 3462 | fetch_decode_modrm(emu); |
| 3463 | if (emu->cur_mod != 3) |
| 3464 | decode_rl_address(emu); |
| 3465 | } |
| 3466 | /* opcode=0xde */ |
| 3467 | static void |
| 3468 | x86emuOp_esc_coprocess_de(struct X86EMU *emu) |
| 3469 | { |
| 3470 | fetch_decode_modrm(emu); |
| 3471 | if (emu->cur_mod != 3) |
| 3472 | decode_rl_address(emu); |
| 3473 | } |
| 3474 | /* opcode=0xdf */ |
| 3475 | static void |
| 3476 | x86emuOp_esc_coprocess_df(struct X86EMU *emu) |
| 3477 | { |
| 3478 | fetch_decode_modrm(emu); |
| 3479 | if (emu->cur_mod != 3) |
| 3480 | decode_rl_address(emu); |
| 3481 | } |
| 3482 | |
| 3483 | /**************************************************************************** |
| 3484 | REMARKS: |
| 3485 | Handles opcode 0xe0 |
| 3486 | ****************************************************************************/ |
| 3487 | static void |
| 3488 | x86emuOp_loopne(struct X86EMU *emu) |
| 3489 | { |
| 3490 | int16_t ip; |
| 3491 | |
| 3492 | ip = (int8_t) fetch_byte_imm(emu); |
| 3493 | ip += (int16_t) emu->x86.R_IP; |
| 3494 | emu->x86.R_CX -= 1; |
| 3495 | if (emu->x86.R_CX != 0 && !ACCESS_FLAG(F_ZF)) /* CX != 0 and !ZF */ |
| 3496 | emu->x86.R_IP = ip; |
| 3497 | } |
| 3498 | /**************************************************************************** |
| 3499 | REMARKS: |
| 3500 | Handles opcode 0xe1 |
| 3501 | ****************************************************************************/ |
| 3502 | static void |
| 3503 | x86emuOp_loope(struct X86EMU *emu) |
| 3504 | { |
| 3505 | int16_t ip; |
| 3506 | |
| 3507 | ip = (int8_t) fetch_byte_imm(emu); |
| 3508 | ip += (int16_t) emu->x86.R_IP; |
| 3509 | emu->x86.R_CX -= 1; |
| 3510 | if (emu->x86.R_CX != 0 && ACCESS_FLAG(F_ZF)) /* CX != 0 and ZF */ |
| 3511 | emu->x86.R_IP = ip; |
| 3512 | } |
| 3513 | /**************************************************************************** |
| 3514 | REMARKS: |
| 3515 | Handles opcode 0xe2 |
| 3516 | ****************************************************************************/ |
| 3517 | static void |
| 3518 | x86emuOp_loop(struct X86EMU *emu) |
| 3519 | { |
| 3520 | int16_t ip; |
| 3521 | |
| 3522 | ip = (int8_t) fetch_byte_imm(emu); |
| 3523 | ip += (int16_t) emu->x86.R_IP; |
| 3524 | emu->x86.R_CX -= 1; |
| 3525 | if (emu->x86.R_CX != 0) |
| 3526 | emu->x86.R_IP = ip; |
| 3527 | } |
| 3528 | /**************************************************************************** |
| 3529 | REMARKS: |
| 3530 | Handles opcode 0xe3 |
| 3531 | ****************************************************************************/ |
| 3532 | static void |
| 3533 | x86emuOp_jcxz(struct X86EMU *emu) |
| 3534 | { |
| 3535 | uint16_t target; |
| 3536 | int8_t offset; |
| 3537 | |
| 3538 | /* jump to byte offset if overflow flag is set */ |
| 3539 | offset = (int8_t) fetch_byte_imm(emu); |
| 3540 | target = (uint16_t) (emu->x86.R_IP + offset); |
| 3541 | if (emu->x86.R_CX == 0) |
| 3542 | emu->x86.R_IP = target; |
| 3543 | } |
| 3544 | /**************************************************************************** |
| 3545 | REMARKS: |
| 3546 | Handles opcode 0xe4 |
| 3547 | ****************************************************************************/ |
| 3548 | static void |
| 3549 | x86emuOp_in_byte_AL_IMM(struct X86EMU *emu) |
| 3550 | { |
| 3551 | uint8_t port; |
| 3552 | |
| 3553 | port = (uint8_t) fetch_byte_imm(emu); |
| 3554 | emu->x86.R_AL = (*emu->emu_inb) (emu, port); |
| 3555 | } |
| 3556 | /**************************************************************************** |
| 3557 | REMARKS: |
| 3558 | Handles opcode 0xe5 |
| 3559 | ****************************************************************************/ |
| 3560 | static void |
| 3561 | x86emuOp_in_word_AX_IMM(struct X86EMU *emu) |
| 3562 | { |
| 3563 | uint8_t port; |
| 3564 | |
| 3565 | port = (uint8_t) fetch_byte_imm(emu); |
| 3566 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 3567 | emu->x86.R_EAX = (*emu->emu_inl) (emu, port); |
| 3568 | } else { |
| 3569 | emu->x86.R_AX = (*emu->emu_inw) (emu, port); |
| 3570 | } |
| 3571 | } |
| 3572 | /**************************************************************************** |
| 3573 | REMARKS: |
| 3574 | Handles opcode 0xe6 |
| 3575 | ****************************************************************************/ |
| 3576 | static void |
| 3577 | x86emuOp_out_byte_IMM_AL(struct X86EMU *emu) |
| 3578 | { |
| 3579 | uint8_t port; |
| 3580 | |
| 3581 | port = (uint8_t) fetch_byte_imm(emu); |
| 3582 | (*emu->emu_outb) (emu, port, emu->x86.R_AL); |
| 3583 | } |
| 3584 | /**************************************************************************** |
| 3585 | REMARKS: |
| 3586 | Handles opcode 0xe7 |
| 3587 | ****************************************************************************/ |
| 3588 | static void |
| 3589 | x86emuOp_out_word_IMM_AX(struct X86EMU *emu) |
| 3590 | { |
| 3591 | uint8_t port; |
| 3592 | |
| 3593 | port = (uint8_t) fetch_byte_imm(emu); |
| 3594 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 3595 | (*emu->emu_outl) (emu, port, emu->x86.R_EAX); |
| 3596 | } else { |
| 3597 | (*emu->emu_outw) (emu, port, emu->x86.R_AX); |
| 3598 | } |
| 3599 | } |
| 3600 | /**************************************************************************** |
| 3601 | REMARKS: |
| 3602 | Handles opcode 0xe8 |
| 3603 | ****************************************************************************/ |
| 3604 | static void |
| 3605 | x86emuOp_call_near_IMM(struct X86EMU *emu) |
| 3606 | { |
| 3607 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 3608 | int32_t ip; |
| 3609 | ip = (int32_t) fetch_long_imm(emu); |
| 3610 | ip += (int32_t) emu->x86.R_EIP; |
| 3611 | push_long(emu, emu->x86.R_EIP); |
| 3612 | emu->x86.R_EIP = ip; |
| 3613 | } else { |
| 3614 | int16_t ip; |
| 3615 | ip = (int16_t) fetch_word_imm(emu); |
| 3616 | ip += (int16_t) emu->x86.R_IP; /* CHECK SIGN */ |
| 3617 | push_word(emu, emu->x86.R_IP); |
| 3618 | emu->x86.R_IP = ip; |
| 3619 | } |
| 3620 | } |
| 3621 | /**************************************************************************** |
| 3622 | REMARKS: |
| 3623 | Handles opcode 0xe9 |
| 3624 | ****************************************************************************/ |
| 3625 | static void |
| 3626 | x86emuOp_jump_near_IMM(struct X86EMU *emu) |
| 3627 | { |
| 3628 | int ip; |
| 3629 | |
| 3630 | ip = (int16_t) fetch_word_imm(emu); |
| 3631 | ip += (int16_t) emu->x86.R_IP; |
| 3632 | emu->x86.R_IP = (uint16_t) ip; |
| 3633 | } |
| 3634 | /**************************************************************************** |
| 3635 | REMARKS: |
| 3636 | Handles opcode 0xea |
| 3637 | ****************************************************************************/ |
| 3638 | static void |
| 3639 | x86emuOp_jump_far_IMM(struct X86EMU *emu) |
| 3640 | { |
| 3641 | uint16_t cs, ip; |
| 3642 | |
| 3643 | ip = fetch_word_imm(emu); |
| 3644 | cs = fetch_word_imm(emu); |
| 3645 | emu->x86.R_IP = ip; |
| 3646 | emu->x86.R_CS = cs; |
| 3647 | } |
| 3648 | /**************************************************************************** |
| 3649 | REMARKS: |
| 3650 | Handles opcode 0xeb |
| 3651 | ****************************************************************************/ |
| 3652 | static void |
| 3653 | x86emuOp_jump_byte_IMM(struct X86EMU *emu) |
| 3654 | { |
| 3655 | uint16_t target; |
| 3656 | int8_t offset; |
| 3657 | |
| 3658 | offset = (int8_t) fetch_byte_imm(emu); |
| 3659 | target = (uint16_t) (emu->x86.R_IP + offset); |
| 3660 | emu->x86.R_IP = target; |
| 3661 | } |
| 3662 | /**************************************************************************** |
| 3663 | REMARKS: |
| 3664 | Handles opcode 0xec |
| 3665 | ****************************************************************************/ |
| 3666 | static void |
| 3667 | x86emuOp_in_byte_AL_DX(struct X86EMU *emu) |
| 3668 | { |
| 3669 | emu->x86.R_AL = (*emu->emu_inb) (emu, emu->x86.R_DX); |
| 3670 | } |
| 3671 | /**************************************************************************** |
| 3672 | REMARKS: |
| 3673 | Handles opcode 0xed |
| 3674 | ****************************************************************************/ |
| 3675 | static void |
| 3676 | x86emuOp_in_word_AX_DX(struct X86EMU *emu) |
| 3677 | { |
| 3678 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 3679 | emu->x86.R_EAX = (*emu->emu_inl) (emu, emu->x86.R_DX); |
| 3680 | } else { |
| 3681 | emu->x86.R_AX = (*emu->emu_inw) (emu, emu->x86.R_DX); |
| 3682 | } |
| 3683 | } |
| 3684 | /**************************************************************************** |
| 3685 | REMARKS: |
| 3686 | Handles opcode 0xee |
| 3687 | ****************************************************************************/ |
| 3688 | static void |
| 3689 | x86emuOp_out_byte_DX_AL(struct X86EMU *emu) |
| 3690 | { |
| 3691 | (*emu->emu_outb) (emu, emu->x86.R_DX, emu->x86.R_AL); |
| 3692 | } |
| 3693 | /**************************************************************************** |
| 3694 | REMARKS: |
| 3695 | Handles opcode 0xef |
| 3696 | ****************************************************************************/ |
| 3697 | static void |
| 3698 | x86emuOp_out_word_DX_AX(struct X86EMU *emu) |
| 3699 | { |
| 3700 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 3701 | (*emu->emu_outl) (emu, emu->x86.R_DX, emu->x86.R_EAX); |
| 3702 | } else { |
| 3703 | (*emu->emu_outw) (emu, emu->x86.R_DX, emu->x86.R_AX); |
| 3704 | } |
| 3705 | } |
| 3706 | /**************************************************************************** |
| 3707 | REMARKS: |
| 3708 | Handles opcode 0xf0 |
| 3709 | ****************************************************************************/ |
| 3710 | static void |
| 3711 | x86emuOp_lock(struct X86EMU *emu) |
| 3712 | { |
| 3713 | } |
| 3714 | /*opcode 0xf1 ILLEGAL OPERATION */ |
| 3715 | |
| 3716 | /**************************************************************************** |
| 3717 | REMARKS: |
| 3718 | Handles opcode 0xf5 |
| 3719 | ****************************************************************************/ |
| 3720 | static void |
| 3721 | x86emuOp_cmc(struct X86EMU *emu) |
| 3722 | { |
| 3723 | if (ACCESS_FLAG(F_CF)) |
| 3724 | CLEAR_FLAG(F_CF); |
| 3725 | else |
| 3726 | SET_FLAG(F_CF); |
| 3727 | } |
| 3728 | /**************************************************************************** |
| 3729 | REMARKS: |
| 3730 | Handles opcode 0xf6 |
| 3731 | ****************************************************************************/ |
| 3732 | static void |
| 3733 | x86emuOp_opcF6_byte_RM(struct X86EMU *emu) |
| 3734 | { |
| 3735 | uint8_t destval, srcval; |
| 3736 | |
| 3737 | /* long, drawn out code follows. Double switch for a total of 32 |
| 3738 | * cases. */ |
| 3739 | fetch_decode_modrm(emu); |
| 3740 | if (emu->cur_rh == 1) |
| 3741 | X86EMU_halt_sys(emu); |
| 3742 | |
| 3743 | if (emu->cur_rh == 0) { |
| 3744 | destval = decode_and_fetch_byte_imm8(emu, &srcval); |
| 3745 | test_byte(emu, destval, srcval); |
| 3746 | return; |
| 3747 | } |
| 3748 | destval = decode_and_fetch_byte(emu); |
| 3749 | switch (emu->cur_rh) { |
| 3750 | case 2: |
| 3751 | destval = ~destval; |
| 3752 | write_back_byte(emu, destval); |
| 3753 | break; |
| 3754 | case 3: |
| 3755 | destval = neg_byte(emu, destval); |
| 3756 | write_back_byte(emu, destval); |
| 3757 | break; |
| 3758 | case 4: |
| 3759 | mul_byte(emu, destval); |
| 3760 | break; |
| 3761 | case 5: |
| 3762 | imul_byte(emu, destval); |
| 3763 | break; |
| 3764 | case 6: |
| 3765 | div_byte(emu, destval); |
| 3766 | break; |
| 3767 | case 7: |
| 3768 | idiv_byte(emu, destval); |
| 3769 | break; |
| 3770 | } |
| 3771 | } |
| 3772 | /**************************************************************************** |
| 3773 | REMARKS: |
| 3774 | Handles opcode 0xf7 |
| 3775 | ****************************************************************************/ |
| 3776 | static void |
| 3777 | x86emuOp32_opcF7_word_RM(struct X86EMU *emu) |
| 3778 | { |
| 3779 | uint32_t destval, srcval; |
| 3780 | |
| 3781 | /* long, drawn out code follows. Double switch for a total of 32 |
| 3782 | * cases. */ |
| 3783 | fetch_decode_modrm(emu); |
| 3784 | if (emu->cur_rh == 1) |
| 3785 | X86EMU_halt_sys(emu); |
| 3786 | |
| 3787 | if (emu->cur_rh == 0) { |
| 3788 | if (emu->cur_mod != 3) { |
| 3789 | uint32_t destoffset; |
| 3790 | |
| 3791 | destoffset = decode_rl_address(emu); |
| 3792 | srcval = fetch_long_imm(emu); |
| 3793 | destval = fetch_data_long(emu, destoffset); |
| 3794 | } else { |
| 3795 | srcval = fetch_long_imm(emu); |
| 3796 | destval = *decode_rl_long_register(emu); |
| 3797 | } |
| 3798 | test_long(emu, destval, srcval); |
| 3799 | return; |
| 3800 | } |
| 3801 | destval = decode_and_fetch_long(emu); |
| 3802 | switch (emu->cur_rh) { |
| 3803 | case 2: |
| 3804 | destval = ~destval; |
| 3805 | write_back_long(emu, destval); |
| 3806 | break; |
| 3807 | case 3: |
| 3808 | destval = neg_long(emu, destval); |
| 3809 | write_back_long(emu, destval); |
| 3810 | break; |
| 3811 | case 4: |
| 3812 | mul_long(emu, destval); |
| 3813 | break; |
| 3814 | case 5: |
| 3815 | imul_long(emu, destval); |
| 3816 | break; |
| 3817 | case 6: |
| 3818 | div_long(emu, destval); |
| 3819 | break; |
| 3820 | case 7: |
| 3821 | idiv_long(emu, destval); |
| 3822 | break; |
| 3823 | } |
| 3824 | } |
| 3825 | static void |
| 3826 | x86emuOp16_opcF7_word_RM(struct X86EMU *emu) |
| 3827 | { |
| 3828 | uint16_t destval, srcval; |
| 3829 | |
| 3830 | /* long, drawn out code follows. Double switch for a total of 32 |
| 3831 | * cases. */ |
| 3832 | fetch_decode_modrm(emu); |
| 3833 | if (emu->cur_rh == 1) |
| 3834 | X86EMU_halt_sys(emu); |
| 3835 | |
| 3836 | if (emu->cur_rh == 0) { |
| 3837 | if (emu->cur_mod != 3) { |
| 3838 | uint32_t destoffset; |
| 3839 | |
| 3840 | destoffset = decode_rl_address(emu); |
| 3841 | srcval = fetch_word_imm(emu); |
| 3842 | destval = fetch_data_word(emu, destoffset); |
| 3843 | } else { |
| 3844 | srcval = fetch_word_imm(emu); |
| 3845 | destval = *decode_rl_word_register(emu); |
| 3846 | } |
| 3847 | test_word(emu, destval, srcval); |
| 3848 | return; |
| 3849 | } |
| 3850 | destval = decode_and_fetch_word(emu); |
| 3851 | switch (emu->cur_rh) { |
| 3852 | case 2: |
| 3853 | destval = ~destval; |
| 3854 | write_back_word(emu, destval); |
| 3855 | break; |
| 3856 | case 3: |
| 3857 | destval = neg_word(emu, destval); |
| 3858 | write_back_word(emu, destval); |
| 3859 | break; |
| 3860 | case 4: |
| 3861 | mul_word(emu, destval); |
| 3862 | break; |
| 3863 | case 5: |
| 3864 | imul_word(emu, destval); |
| 3865 | break; |
| 3866 | case 6: |
| 3867 | div_word(emu, destval); |
| 3868 | break; |
| 3869 | case 7: |
| 3870 | idiv_word(emu, destval); |
| 3871 | break; |
| 3872 | } |
| 3873 | } |
| 3874 | static void |
| 3875 | x86emuOp_opcF7_word_RM(struct X86EMU *emu) |
| 3876 | { |
| 3877 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 3878 | x86emuOp32_opcF7_word_RM(emu); |
| 3879 | else |
| 3880 | x86emuOp16_opcF7_word_RM(emu); |
| 3881 | } |
| 3882 | /**************************************************************************** |
| 3883 | REMARKS: |
| 3884 | Handles opcode 0xfe |
| 3885 | ****************************************************************************/ |
| 3886 | static void |
| 3887 | x86emuOp_opcFE_byte_RM(struct X86EMU *emu) |
| 3888 | { |
| 3889 | uint8_t destval; |
| 3890 | uint32_t destoffset; |
| 3891 | uint8_t *destreg; |
| 3892 | |
| 3893 | /* Yet another special case instruction. */ |
| 3894 | fetch_decode_modrm(emu); |
| 3895 | if (emu->cur_mod != 3) { |
| 3896 | destoffset = decode_rl_address(emu); |
| 3897 | switch (emu->cur_rh) { |
| 3898 | case 0: /* inc word ptr ... */ |
| 3899 | destval = fetch_data_byte(emu, destoffset); |
| 3900 | destval = inc_byte(emu, destval); |
| 3901 | store_data_byte(emu, destoffset, destval); |
| 3902 | break; |
| 3903 | case 1: /* dec word ptr ... */ |
| 3904 | destval = fetch_data_byte(emu, destoffset); |
| 3905 | destval = dec_byte(emu, destval); |
| 3906 | store_data_byte(emu, destoffset, destval); |
| 3907 | break; |
| 3908 | } |
| 3909 | } else { |
| 3910 | destreg = decode_rl_byte_register(emu); |
| 3911 | switch (emu->cur_rh) { |
| 3912 | case 0: |
| 3913 | *destreg = inc_byte(emu, *destreg); |
| 3914 | break; |
| 3915 | case 1: |
| 3916 | *destreg = dec_byte(emu, *destreg); |
| 3917 | break; |
| 3918 | } |
| 3919 | } |
| 3920 | } |
| 3921 | /**************************************************************************** |
| 3922 | REMARKS: |
| 3923 | Handles opcode 0xff |
| 3924 | ****************************************************************************/ |
| 3925 | static void |
| 3926 | x86emuOp32_opcFF_word_RM(struct X86EMU *emu) |
| 3927 | { |
| 3928 | uint32_t destoffset = 0; |
| 3929 | uint32_t destval, *destreg; |
| 3930 | |
| 3931 | if (emu->cur_mod != 3) { |
| 3932 | destoffset = decode_rl_address(emu); |
| 3933 | destval = fetch_data_long(emu, destoffset); |
| 3934 | switch (emu->cur_rh) { |
| 3935 | case 0: /* inc word ptr ... */ |
| 3936 | destval = inc_long(emu, destval); |
| 3937 | store_data_long(emu, destoffset, destval); |
| 3938 | break; |
| 3939 | case 1: /* dec word ptr ... */ |
| 3940 | destval = dec_long(emu, destval); |
| 3941 | store_data_long(emu, destoffset, destval); |
| 3942 | break; |
| 3943 | case 6: /* push word ptr ... */ |
| 3944 | push_long(emu, destval); |
| 3945 | break; |
| 3946 | } |
| 3947 | } else { |
| 3948 | destreg = decode_rl_long_register(emu); |
| 3949 | switch (emu->cur_rh) { |
| 3950 | case 0: |
| 3951 | *destreg = inc_long(emu, *destreg); |
| 3952 | break; |
| 3953 | case 1: |
| 3954 | *destreg = dec_long(emu, *destreg); |
| 3955 | break; |
| 3956 | case 6: |
| 3957 | push_long(emu, *destreg); |
| 3958 | break; |
| 3959 | } |
| 3960 | } |
| 3961 | } |
| 3962 | |
| 3963 | static void |
| 3964 | x86emuOp16_opcFF_word_RM(struct X86EMU *emu) |
| 3965 | { |
| 3966 | uint32_t destoffset = 0; |
| 3967 | uint16_t *destreg; |
| 3968 | uint16_t destval; |
| 3969 | |
| 3970 | if (emu->cur_mod != 3) { |
| 3971 | destoffset = decode_rl_address(emu); |
| 3972 | destval = fetch_data_word(emu, destoffset); |
| 3973 | switch (emu->cur_rh) { |
| 3974 | case 0: |
| 3975 | destval = inc_word(emu, destval); |
| 3976 | store_data_word(emu, destoffset, destval); |
| 3977 | break; |
| 3978 | case 1: /* dec word ptr ... */ |
| 3979 | destval = dec_word(emu, destval); |
| 3980 | store_data_word(emu, destoffset, destval); |
| 3981 | break; |
| 3982 | case 6: /* push word ptr ... */ |
| 3983 | push_word(emu, destval); |
| 3984 | break; |
| 3985 | } |
| 3986 | } else { |
| 3987 | destreg = decode_rl_word_register(emu); |
| 3988 | switch (emu->cur_rh) { |
| 3989 | case 0: |
| 3990 | *destreg = inc_word(emu, *destreg); |
| 3991 | break; |
| 3992 | case 1: |
| 3993 | *destreg = dec_word(emu, *destreg); |
| 3994 | break; |
| 3995 | case 6: |
| 3996 | push_word(emu, *destreg); |
| 3997 | break; |
| 3998 | } |
| 3999 | } |
| 4000 | } |
| 4001 | |
| 4002 | static void |
| 4003 | x86emuOp_opcFF_word_RM(struct X86EMU *emu) |
| 4004 | { |
| 4005 | uint32_t destoffset = 0; |
| 4006 | uint16_t destval, destval2; |
| 4007 | |
| 4008 | /* Yet another special case instruction. */ |
| 4009 | fetch_decode_modrm(emu); |
| 4010 | if ((emu->cur_mod == 3 && (emu->cur_rh == 3 || emu->cur_rh == 5)) || emu->cur_rh == 7) |
| 4011 | X86EMU_halt_sys(emu); |
| 4012 | if (emu->cur_rh == 0 || emu->cur_rh == 1 || emu->cur_rh == 6) { |
| 4013 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 4014 | x86emuOp32_opcFF_word_RM(emu); |
| 4015 | else |
| 4016 | x86emuOp16_opcFF_word_RM(emu); |
| 4017 | return; |
| 4018 | } |
| 4019 | |
| 4020 | if (emu->cur_mod != 3) { |
| 4021 | destoffset = decode_rl_address(emu); |
| 4022 | destval = fetch_data_word(emu, destoffset); |
| 4023 | switch (emu->cur_rh) { |
| 4024 | case 3: /* call far ptr ... */ |
| 4025 | destval2 = fetch_data_word(emu, destoffset + 2); |
| 4026 | push_word(emu, emu->x86.R_CS); |
| 4027 | emu->x86.R_CS = destval2; |
| 4028 | push_word(emu, emu->x86.R_IP); |
| 4029 | emu->x86.R_IP = destval; |
| 4030 | break; |
| 4031 | case 5: /* jmp far ptr ... */ |
| 4032 | destval2 = fetch_data_word(emu, destoffset + 2); |
| 4033 | emu->x86.R_IP = destval; |
| 4034 | emu->x86.R_CS = destval2; |
| 4035 | break; |
| 4036 | } |
| 4037 | } else { |
| 4038 | destval = *decode_rl_word_register(emu); |
| 4039 | } |
| 4040 | |
| 4041 | switch (emu->cur_rh) { |
| 4042 | case 2: /* call word ptr */ |
| 4043 | push_word(emu, emu->x86.R_IP); |
| 4044 | emu->x86.R_IP = destval; |
| 4045 | break; |
| 4046 | case 4: /* jmp */ |
| 4047 | emu->x86.R_IP = destval; |
| 4048 | break; |
| 4049 | } |
| 4050 | } |
| 4051 | /*************************************************************************** |
| 4052 | * Single byte operation code table: |
| 4053 | **************************************************************************/ |
| 4054 | static void |
| 4055 | X86EMU_exec_one_byte(struct X86EMU * emu) |
| 4056 | { |
| 4057 | uint8_t op1; |
| 4058 | |
| 4059 | op1 = fetch_byte_imm(emu); |
| 4060 | |
| 4061 | switch (op1) { |
| 4062 | case 0x00: |
| 4063 | common_binop_byte_rm_r(emu, add_byte); |
| 4064 | break; |
| 4065 | case 0x01: |
| 4066 | common_binop_word_long_rm_r(emu, add_word, add_long); |
| 4067 | break; |
| 4068 | case 0x02: |
| 4069 | common_binop_byte_r_rm(emu, add_byte); |
| 4070 | break; |
| 4071 | case 0x03: |
| 4072 | common_binop_word_long_r_rm(emu, add_word, add_long); |
| 4073 | break; |
| 4074 | case 0x04: |
| 4075 | common_binop_byte_imm(emu, add_byte); |
| 4076 | break; |
| 4077 | case 0x05: |
| 4078 | common_binop_word_long_imm(emu, add_word, add_long); |
| 4079 | break; |
| 4080 | case 0x06: |
| 4081 | push_word(emu, emu->x86.R_ES); |
| 4082 | break; |
| 4083 | case 0x07: |
| 4084 | emu->x86.R_ES = pop_word(emu); |
| 4085 | break; |
| 4086 | |
| 4087 | case 0x08: |
| 4088 | common_binop_byte_rm_r(emu, or_byte); |
| 4089 | break; |
| 4090 | case 0x09: |
| 4091 | common_binop_word_long_rm_r(emu, or_word, or_long); |
| 4092 | break; |
| 4093 | case 0x0a: |
| 4094 | common_binop_byte_r_rm(emu, or_byte); |
| 4095 | break; |
| 4096 | case 0x0b: |
| 4097 | common_binop_word_long_r_rm(emu, or_word, or_long); |
| 4098 | break; |
| 4099 | case 0x0c: |
| 4100 | common_binop_byte_imm(emu, or_byte); |
| 4101 | break; |
| 4102 | case 0x0d: |
| 4103 | common_binop_word_long_imm(emu, or_word, or_long); |
| 4104 | break; |
| 4105 | case 0x0e: |
| 4106 | push_word(emu, emu->x86.R_CS); |
| 4107 | break; |
| 4108 | case 0x0f: |
| 4109 | X86EMU_exec_two_byte(emu); |
| 4110 | break; |
| 4111 | |
| 4112 | case 0x10: |
| 4113 | common_binop_byte_rm_r(emu, adc_byte); |
| 4114 | break; |
| 4115 | case 0x11: |
| 4116 | common_binop_word_long_rm_r(emu, adc_word, adc_long); |
| 4117 | break; |
| 4118 | case 0x12: |
| 4119 | common_binop_byte_r_rm(emu, adc_byte); |
| 4120 | break; |
| 4121 | case 0x13: |
| 4122 | common_binop_word_long_r_rm(emu, adc_word, adc_long); |
| 4123 | break; |
| 4124 | case 0x14: |
| 4125 | common_binop_byte_imm(emu, adc_byte); |
| 4126 | break; |
| 4127 | case 0x15: |
| 4128 | common_binop_word_long_imm(emu, adc_word, adc_long); |
| 4129 | break; |
| 4130 | case 0x16: |
| 4131 | push_word(emu, emu->x86.R_SS); |
| 4132 | break; |
| 4133 | case 0x17: |
| 4134 | emu->x86.R_SS = pop_word(emu); |
| 4135 | break; |
| 4136 | |
| 4137 | case 0x18: |
| 4138 | common_binop_byte_rm_r(emu, sbb_byte); |
| 4139 | break; |
| 4140 | case 0x19: |
| 4141 | common_binop_word_long_rm_r(emu, sbb_word, sbb_long); |
| 4142 | break; |
| 4143 | case 0x1a: |
| 4144 | common_binop_byte_r_rm(emu, sbb_byte); |
| 4145 | break; |
| 4146 | case 0x1b: |
| 4147 | common_binop_word_long_r_rm(emu, sbb_word, sbb_long); |
| 4148 | break; |
| 4149 | case 0x1c: |
| 4150 | common_binop_byte_imm(emu, sbb_byte); |
| 4151 | break; |
| 4152 | case 0x1d: |
| 4153 | common_binop_word_long_imm(emu, sbb_word, sbb_long); |
| 4154 | break; |
| 4155 | case 0x1e: |
| 4156 | push_word(emu, emu->x86.R_DS); |
| 4157 | break; |
| 4158 | case 0x1f: |
| 4159 | emu->x86.R_DS = pop_word(emu); |
| 4160 | break; |
| 4161 | |
| 4162 | case 0x20: |
| 4163 | common_binop_byte_rm_r(emu, and_byte); |
| 4164 | break; |
| 4165 | case 0x21: |
| 4166 | common_binop_word_long_rm_r(emu, and_word, and_long); |
| 4167 | break; |
| 4168 | case 0x22: |
| 4169 | common_binop_byte_r_rm(emu, and_byte); |
| 4170 | break; |
| 4171 | case 0x23: |
| 4172 | common_binop_word_long_r_rm(emu, and_word, and_long); |
| 4173 | break; |
| 4174 | case 0x24: |
| 4175 | common_binop_byte_imm(emu, and_byte); |
| 4176 | break; |
| 4177 | case 0x25: |
| 4178 | common_binop_word_long_imm(emu, and_word, and_long); |
| 4179 | break; |
| 4180 | case 0x26: |
| 4181 | emu->x86.mode |= SYSMODE_SEGOVR_ES; |
| 4182 | break; |
| 4183 | case 0x27: |
| 4184 | emu->x86.R_AL = daa_byte(emu, emu->x86.R_AL); |
| 4185 | break; |
| 4186 | |
| 4187 | case 0x28: |
| 4188 | common_binop_byte_rm_r(emu, sub_byte); |
| 4189 | break; |
| 4190 | case 0x29: |
| 4191 | common_binop_word_long_rm_r(emu, sub_word, sub_long); |
| 4192 | break; |
| 4193 | case 0x2a: |
| 4194 | common_binop_byte_r_rm(emu, sub_byte); |
| 4195 | break; |
| 4196 | case 0x2b: |
| 4197 | common_binop_word_long_r_rm(emu, sub_word, sub_long); |
| 4198 | break; |
| 4199 | case 0x2c: |
| 4200 | common_binop_byte_imm(emu, sub_byte); |
| 4201 | break; |
| 4202 | case 0x2d: |
| 4203 | common_binop_word_long_imm(emu, sub_word, sub_long); |
| 4204 | break; |
| 4205 | case 0x2e: |
| 4206 | emu->x86.mode |= SYSMODE_SEGOVR_CS; |
| 4207 | break; |
| 4208 | case 0x2f: |
| 4209 | emu->x86.R_AL = das_byte(emu, emu->x86.R_AL); |
| 4210 | break; |
| 4211 | |
| 4212 | case 0x30: |
| 4213 | common_binop_byte_rm_r(emu, xor_byte); |
| 4214 | break; |
| 4215 | case 0x31: |
| 4216 | common_binop_word_long_rm_r(emu, xor_word, xor_long); |
| 4217 | break; |
| 4218 | case 0x32: |
| 4219 | common_binop_byte_r_rm(emu, xor_byte); |
| 4220 | break; |
| 4221 | case 0x33: |
| 4222 | common_binop_word_long_r_rm(emu, xor_word, xor_long); |
| 4223 | break; |
| 4224 | case 0x34: |
| 4225 | common_binop_byte_imm(emu, xor_byte); |
| 4226 | break; |
| 4227 | case 0x35: |
| 4228 | common_binop_word_long_imm(emu, xor_word, xor_long); |
| 4229 | break; |
| 4230 | case 0x36: |
| 4231 | emu->x86.mode |= SYSMODE_SEGOVR_SS; |
| 4232 | break; |
| 4233 | case 0x37: |
| 4234 | emu->x86.R_AX = aaa_word(emu, emu->x86.R_AX); |
| 4235 | break; |
| 4236 | |
| 4237 | case 0x38: |
| 4238 | common_binop_ns_byte_rm_r(emu, cmp_byte_no_return); |
| 4239 | break; |
| 4240 | case 0x39: |
| 4241 | common_binop_ns_word_long_rm_r(emu, cmp_word_no_return, |
| 4242 | cmp_long_no_return); |
| 4243 | break; |
| 4244 | case 0x3a: |
| 4245 | x86emuOp_cmp_byte_R_RM(emu); |
| 4246 | break; |
| 4247 | case 0x3b: |
| 4248 | x86emuOp_cmp_word_R_RM(emu); |
| 4249 | break; |
| 4250 | case 0x3c: |
| 4251 | x86emuOp_cmp_byte_AL_IMM(emu); |
| 4252 | break; |
| 4253 | case 0x3d: |
| 4254 | x86emuOp_cmp_word_AX_IMM(emu); |
| 4255 | break; |
| 4256 | case 0x3e: |
| 4257 | emu->x86.mode |= SYSMODE_SEGOVR_DS; |
| 4258 | break; |
| 4259 | case 0x3f: |
| 4260 | emu->x86.R_AX = aas_word(emu, emu->x86.R_AX); |
| 4261 | break; |
| 4262 | |
| 4263 | case 0x40: |
| 4264 | common_inc_word_long(emu, &emu->x86.register_a); |
| 4265 | break; |
| 4266 | case 0x41: |
| 4267 | common_inc_word_long(emu, &emu->x86.register_c); |
| 4268 | break; |
| 4269 | case 0x42: |
| 4270 | common_inc_word_long(emu, &emu->x86.register_d); |
| 4271 | break; |
| 4272 | case 0x43: |
| 4273 | common_inc_word_long(emu, &emu->x86.register_b); |
| 4274 | break; |
| 4275 | case 0x44: |
| 4276 | common_inc_word_long(emu, &emu->x86.register_sp); |
| 4277 | break; |
| 4278 | case 0x45: |
| 4279 | common_inc_word_long(emu, &emu->x86.register_bp); |
| 4280 | break; |
| 4281 | case 0x46: |
| 4282 | common_inc_word_long(emu, &emu->x86.register_si); |
| 4283 | break; |
| 4284 | case 0x47: |
| 4285 | common_inc_word_long(emu, &emu->x86.register_di); |
| 4286 | break; |
| 4287 | |
| 4288 | case 0x48: |
| 4289 | common_dec_word_long(emu, &emu->x86.register_a); |
| 4290 | break; |
| 4291 | case 0x49: |
| 4292 | common_dec_word_long(emu, &emu->x86.register_c); |
| 4293 | break; |
| 4294 | case 0x4a: |
| 4295 | common_dec_word_long(emu, &emu->x86.register_d); |
| 4296 | break; |
| 4297 | case 0x4b: |
| 4298 | common_dec_word_long(emu, &emu->x86.register_b); |
| 4299 | break; |
| 4300 | case 0x4c: |
| 4301 | common_dec_word_long(emu, &emu->x86.register_sp); |
| 4302 | break; |
| 4303 | case 0x4d: |
| 4304 | common_dec_word_long(emu, &emu->x86.register_bp); |
| 4305 | break; |
| 4306 | case 0x4e: |
| 4307 | common_dec_word_long(emu, &emu->x86.register_si); |
| 4308 | break; |
| 4309 | case 0x4f: |
| 4310 | common_dec_word_long(emu, &emu->x86.register_di); |
| 4311 | break; |
| 4312 | |
| 4313 | case 0x50: |
| 4314 | common_push_word_long(emu, &emu->x86.register_a); |
| 4315 | break; |
| 4316 | case 0x51: |
| 4317 | common_push_word_long(emu, &emu->x86.register_c); |
| 4318 | break; |
| 4319 | case 0x52: |
| 4320 | common_push_word_long(emu, &emu->x86.register_d); |
| 4321 | break; |
| 4322 | case 0x53: |
| 4323 | common_push_word_long(emu, &emu->x86.register_b); |
| 4324 | break; |
| 4325 | case 0x54: |
| 4326 | common_push_word_long(emu, &emu->x86.register_sp); |
| 4327 | break; |
| 4328 | case 0x55: |
| 4329 | common_push_word_long(emu, &emu->x86.register_bp); |
| 4330 | break; |
| 4331 | case 0x56: |
| 4332 | common_push_word_long(emu, &emu->x86.register_si); |
| 4333 | break; |
| 4334 | case 0x57: |
| 4335 | common_push_word_long(emu, &emu->x86.register_di); |
| 4336 | break; |
| 4337 | |
| 4338 | case 0x58: |
| 4339 | common_pop_word_long(emu, &emu->x86.register_a); |
| 4340 | break; |
| 4341 | case 0x59: |
| 4342 | common_pop_word_long(emu, &emu->x86.register_c); |
| 4343 | break; |
| 4344 | case 0x5a: |
| 4345 | common_pop_word_long(emu, &emu->x86.register_d); |
| 4346 | break; |
| 4347 | case 0x5b: |
| 4348 | common_pop_word_long(emu, &emu->x86.register_b); |
| 4349 | break; |
| 4350 | case 0x5c: |
| 4351 | common_pop_word_long(emu, &emu->x86.register_sp); |
| 4352 | break; |
| 4353 | case 0x5d: |
| 4354 | common_pop_word_long(emu, &emu->x86.register_bp); |
| 4355 | break; |
| 4356 | case 0x5e: |
| 4357 | common_pop_word_long(emu, &emu->x86.register_si); |
| 4358 | break; |
| 4359 | case 0x5f: |
| 4360 | common_pop_word_long(emu, &emu->x86.register_di); |
| 4361 | break; |
| 4362 | |
| 4363 | case 0x60: |
| 4364 | x86emuOp_push_all(emu); |
| 4365 | break; |
| 4366 | case 0x61: |
| 4367 | x86emuOp_pop_all(emu); |
| 4368 | break; |
| 4369 | /* 0x62 bound */ |
| 4370 | /* 0x63 arpl */ |
| 4371 | case 0x64: |
| 4372 | emu->x86.mode |= SYSMODE_SEGOVR_FS; |
| 4373 | break; |
| 4374 | case 0x65: |
| 4375 | emu->x86.mode |= SYSMODE_SEGOVR_GS; |
| 4376 | break; |
| 4377 | case 0x66: |
| 4378 | emu->x86.mode |= SYSMODE_PREFIX_DATA; |
| 4379 | break; |
| 4380 | case 0x67: |
| 4381 | emu->x86.mode |= SYSMODE_PREFIX_ADDR; |
| 4382 | break; |
| 4383 | |
| 4384 | case 0x68: |
| 4385 | x86emuOp_push_word_IMM(emu); |
| 4386 | break; |
| 4387 | case 0x69: |
| 4388 | common_imul_imm(emu, false); |
| 4389 | break; |
| 4390 | case 0x6a: |
| 4391 | x86emuOp_push_byte_IMM(emu); |
| 4392 | break; |
| 4393 | case 0x6b: |
| 4394 | common_imul_imm(emu, true); |
| 4395 | break; |
| 4396 | case 0x6c: |
| 4397 | ins(emu, 1); |
| 4398 | break; |
| 4399 | case 0x6d: |
| 4400 | x86emuOp_ins_word(emu); |
| 4401 | break; |
| 4402 | case 0x6e: |
| 4403 | outs(emu, 1); |
| 4404 | break; |
| 4405 | case 0x6f: |
| 4406 | x86emuOp_outs_word(emu); |
| 4407 | break; |
| 4408 | |
| 4409 | case 0x70: |
| 4410 | common_jmp_near(emu, ACCESS_FLAG(F_OF)); |
| 4411 | break; |
| 4412 | case 0x71: |
| 4413 | common_jmp_near(emu, !ACCESS_FLAG(F_OF)); |
| 4414 | break; |
| 4415 | case 0x72: |
| 4416 | common_jmp_near(emu, ACCESS_FLAG(F_CF)); |
| 4417 | break; |
| 4418 | case 0x73: |
| 4419 | common_jmp_near(emu, !ACCESS_FLAG(F_CF)); |
| 4420 | break; |
| 4421 | case 0x74: |
| 4422 | common_jmp_near(emu, ACCESS_FLAG(F_ZF)); |
| 4423 | break; |
| 4424 | case 0x75: |
| 4425 | common_jmp_near(emu, !ACCESS_FLAG(F_ZF)); |
| 4426 | break; |
| 4427 | case 0x76: |
| 4428 | common_jmp_near(emu, ACCESS_FLAG(F_CF) || ACCESS_FLAG(F_ZF)); |
| 4429 | break; |
| 4430 | case 0x77: |
| 4431 | common_jmp_near(emu, !ACCESS_FLAG(F_CF) && !ACCESS_FLAG(F_ZF)); |
| 4432 | break; |
| 4433 | |
| 4434 | case 0x78: |
| 4435 | common_jmp_near(emu, ACCESS_FLAG(F_SF)); |
| 4436 | break; |
| 4437 | case 0x79: |
| 4438 | common_jmp_near(emu, !ACCESS_FLAG(F_SF)); |
| 4439 | break; |
| 4440 | case 0x7a: |
| 4441 | common_jmp_near(emu, ACCESS_FLAG(F_PF)); |
| 4442 | break; |
| 4443 | case 0x7b: |
| 4444 | common_jmp_near(emu, !ACCESS_FLAG(F_PF)); |
| 4445 | break; |
| 4446 | case 0x7c: |
| 4447 | x86emuOp_jump_near_L(emu); |
| 4448 | break; |
| 4449 | case 0x7d: |
| 4450 | x86emuOp_jump_near_NL(emu); |
| 4451 | break; |
| 4452 | case 0x7e: |
| 4453 | x86emuOp_jump_near_LE(emu); |
| 4454 | break; |
| 4455 | case 0x7f: |
| 4456 | x86emuOp_jump_near_NLE(emu); |
| 4457 | break; |
| 4458 | |
| 4459 | case 0x80: |
| 4460 | x86emuOp_opc80_byte_RM_IMM(emu); |
| 4461 | break; |
| 4462 | case 0x81: |
| 4463 | x86emuOp_opc81_word_RM_IMM(emu); |
| 4464 | break; |
| 4465 | case 0x82: |
| 4466 | x86emuOp_opc82_byte_RM_IMM(emu); |
| 4467 | break; |
| 4468 | case 0x83: |
| 4469 | x86emuOp_opc83_word_RM_IMM(emu); |
| 4470 | break; |
| 4471 | case 0x84: |
| 4472 | common_binop_ns_byte_rm_r(emu, test_byte); |
| 4473 | break; |
| 4474 | case 0x85: |
| 4475 | common_binop_ns_word_long_rm_r(emu, test_word, test_long); |
| 4476 | break; |
| 4477 | case 0x86: |
| 4478 | x86emuOp_xchg_byte_RM_R(emu); |
| 4479 | break; |
| 4480 | case 0x87: |
| 4481 | x86emuOp_xchg_word_RM_R(emu); |
| 4482 | break; |
| 4483 | |
| 4484 | case 0x88: |
| 4485 | x86emuOp_mov_byte_RM_R(emu); |
| 4486 | break; |
| 4487 | case 0x89: |
| 4488 | x86emuOp_mov_word_RM_R(emu); |
| 4489 | break; |
| 4490 | case 0x8a: |
| 4491 | x86emuOp_mov_byte_R_RM(emu); |
| 4492 | break; |
| 4493 | case 0x8b: |
| 4494 | x86emuOp_mov_word_R_RM(emu); |
| 4495 | break; |
| 4496 | case 0x8c: |
| 4497 | x86emuOp_mov_word_RM_SR(emu); |
| 4498 | break; |
| 4499 | case 0x8d: |
| 4500 | x86emuOp_lea_word_R_M(emu); |
| 4501 | break; |
| 4502 | case 0x8e: |
| 4503 | x86emuOp_mov_word_SR_RM(emu); |
| 4504 | break; |
| 4505 | case 0x8f: |
| 4506 | x86emuOp_pop_RM(emu); |
| 4507 | break; |
| 4508 | |
| 4509 | case 0x90: |
| 4510 | /* nop */ |
| 4511 | break; |
| 4512 | case 0x91: |
| 4513 | x86emuOp_xchg_word_AX_CX(emu); |
| 4514 | break; |
| 4515 | case 0x92: |
| 4516 | x86emuOp_xchg_word_AX_DX(emu); |
| 4517 | break; |
| 4518 | case 0x93: |
| 4519 | x86emuOp_xchg_word_AX_BX(emu); |
| 4520 | break; |
| 4521 | case 0x94: |
| 4522 | x86emuOp_xchg_word_AX_SP(emu); |
| 4523 | break; |
| 4524 | case 0x95: |
| 4525 | x86emuOp_xchg_word_AX_BP(emu); |
| 4526 | break; |
| 4527 | case 0x96: |
| 4528 | x86emuOp_xchg_word_AX_SI(emu); |
| 4529 | break; |
| 4530 | case 0x97: |
| 4531 | x86emuOp_xchg_word_AX_DI(emu); |
| 4532 | break; |
| 4533 | |
| 4534 | case 0x98: |
| 4535 | x86emuOp_cbw(emu); |
| 4536 | break; |
| 4537 | case 0x99: |
| 4538 | x86emuOp_cwd(emu); |
| 4539 | break; |
| 4540 | case 0x9a: |
| 4541 | x86emuOp_call_far_IMM(emu); |
| 4542 | break; |
| 4543 | case 0x9b: |
| 4544 | /* wait */ |
| 4545 | break; |
| 4546 | case 0x9c: |
| 4547 | x86emuOp_pushf_word(emu); |
| 4548 | break; |
| 4549 | case 0x9d: |
| 4550 | x86emuOp_popf_word(emu); |
| 4551 | break; |
| 4552 | case 0x9e: |
| 4553 | x86emuOp_sahf(emu); |
| 4554 | break; |
| 4555 | case 0x9f: |
| 4556 | x86emuOp_lahf(emu); |
| 4557 | break; |
| 4558 | |
| 4559 | case 0xa0: |
| 4560 | x86emuOp_mov_AL_M_IMM(emu); |
| 4561 | break; |
| 4562 | case 0xa1: |
| 4563 | x86emuOp_mov_AX_M_IMM(emu); |
| 4564 | break; |
| 4565 | case 0xa2: |
| 4566 | x86emuOp_mov_M_AL_IMM(emu); |
| 4567 | break; |
| 4568 | case 0xa3: |
| 4569 | x86emuOp_mov_M_AX_IMM(emu); |
| 4570 | break; |
| 4571 | case 0xa4: |
| 4572 | x86emuOp_movs_byte(emu); |
| 4573 | break; |
| 4574 | case 0xa5: |
| 4575 | x86emuOp_movs_word(emu); |
| 4576 | break; |
| 4577 | case 0xa6: |
| 4578 | x86emuOp_cmps_byte(emu); |
| 4579 | break; |
| 4580 | case 0xa7: |
| 4581 | x86emuOp_cmps_word(emu); |
| 4582 | break; |
| 4583 | |
| 4584 | case 0xa8: |
| 4585 | test_byte(emu, emu->x86.R_AL, fetch_byte_imm(emu)); |
| 4586 | break; |
| 4587 | case 0xa9: |
| 4588 | x86emuOp_test_AX_IMM(emu); |
| 4589 | break; |
| 4590 | case 0xaa: |
| 4591 | x86emuOp_stos_byte(emu); |
| 4592 | break; |
| 4593 | case 0xab: |
| 4594 | x86emuOp_stos_word(emu); |
| 4595 | break; |
| 4596 | case 0xac: |
| 4597 | x86emuOp_lods_byte(emu); |
| 4598 | break; |
| 4599 | case 0xad: |
| 4600 | x86emuOp_lods_word(emu); |
| 4601 | break; |
| 4602 | case 0xae: |
| 4603 | x86emuOp_scas_byte(emu); |
| 4604 | break; |
| 4605 | case 0xaf: |
| 4606 | x86emuOp_scas_word(emu); |
| 4607 | break; |
| 4608 | |
| 4609 | case 0xb0: |
| 4610 | emu->x86.R_AL = fetch_byte_imm(emu); |
| 4611 | break; |
| 4612 | case 0xb1: |
| 4613 | emu->x86.R_CL = fetch_byte_imm(emu); |
| 4614 | break; |
| 4615 | case 0xb2: |
| 4616 | emu->x86.R_DL = fetch_byte_imm(emu); |
| 4617 | break; |
| 4618 | case 0xb3: |
| 4619 | emu->x86.R_BL = fetch_byte_imm(emu); |
| 4620 | break; |
| 4621 | case 0xb4: |
| 4622 | emu->x86.R_AH = fetch_byte_imm(emu); |
| 4623 | break; |
| 4624 | case 0xb5: |
| 4625 | emu->x86.R_CH = fetch_byte_imm(emu); |
| 4626 | break; |
| 4627 | case 0xb6: |
| 4628 | emu->x86.R_DH = fetch_byte_imm(emu); |
| 4629 | break; |
| 4630 | case 0xb7: |
| 4631 | emu->x86.R_BH = fetch_byte_imm(emu); |
| 4632 | break; |
| 4633 | |
| 4634 | case 0xb8: |
| 4635 | x86emuOp_mov_word_AX_IMM(emu); |
| 4636 | break; |
| 4637 | case 0xb9: |
| 4638 | x86emuOp_mov_word_CX_IMM(emu); |
| 4639 | break; |
| 4640 | case 0xba: |
| 4641 | x86emuOp_mov_word_DX_IMM(emu); |
| 4642 | break; |
| 4643 | case 0xbb: |
| 4644 | x86emuOp_mov_word_BX_IMM(emu); |
| 4645 | break; |
| 4646 | case 0xbc: |
| 4647 | x86emuOp_mov_word_SP_IMM(emu); |
| 4648 | break; |
| 4649 | case 0xbd: |
| 4650 | x86emuOp_mov_word_BP_IMM(emu); |
| 4651 | break; |
| 4652 | case 0xbe: |
| 4653 | x86emuOp_mov_word_SI_IMM(emu); |
| 4654 | break; |
| 4655 | case 0xbf: |
| 4656 | x86emuOp_mov_word_DI_IMM(emu); |
| 4657 | break; |
| 4658 | |
| 4659 | case 0xc0: |
| 4660 | x86emuOp_opcC0_byte_RM_MEM(emu); |
| 4661 | break; |
| 4662 | case 0xc1: |
| 4663 | x86emuOp_opcC1_word_RM_MEM(emu); |
| 4664 | break; |
| 4665 | case 0xc2: |
| 4666 | x86emuOp_ret_near_IMM(emu); |
| 4667 | break; |
| 4668 | case 0xc3: |
| 4669 | emu->x86.R_IP = pop_word(emu); |
| 4670 | break; |
| 4671 | case 0xc4: |
| 4672 | common_load_far_pointer(emu, &emu->x86.R_ES); |
| 4673 | break; |
| 4674 | case 0xc5: |
| 4675 | common_load_far_pointer(emu, &emu->x86.R_DS); |
| 4676 | break; |
| 4677 | case 0xc6: |
| 4678 | x86emuOp_mov_byte_RM_IMM(emu); |
| 4679 | break; |
| 4680 | case 0xc7: |
| 4681 | x86emuOp_mov_word_RM_IMM(emu); |
| 4682 | break; |
| 4683 | case 0xc8: |
| 4684 | x86emuOp_enter(emu); |
| 4685 | break; |
| 4686 | case 0xc9: |
| 4687 | x86emuOp_leave(emu); |
| 4688 | break; |
| 4689 | case 0xca: |
| 4690 | x86emuOp_ret_far_IMM(emu); |
| 4691 | break; |
| 4692 | case 0xcb: |
| 4693 | x86emuOp_ret_far(emu); |
| 4694 | break; |
| 4695 | case 0xcc: |
| 4696 | x86emuOp_int3(emu); |
| 4697 | break; |
| 4698 | case 0xcd: |
| 4699 | x86emuOp_int_IMM(emu); |
| 4700 | break; |
| 4701 | case 0xce: |
| 4702 | x86emuOp_into(emu); |
| 4703 | break; |
| 4704 | case 0xcf: |
| 4705 | x86emuOp_iret(emu); |
| 4706 | break; |
| 4707 | |
| 4708 | case 0xd0: |
| 4709 | x86emuOp_opcD0_byte_RM_1(emu); |
| 4710 | break; |
| 4711 | case 0xd1: |
| 4712 | x86emuOp_opcD1_word_RM_1(emu); |
| 4713 | break; |
| 4714 | case 0xd2: |
| 4715 | x86emuOp_opcD2_byte_RM_CL(emu); |
| 4716 | break; |
| 4717 | case 0xd3: |
| 4718 | x86emuOp_opcD3_word_RM_CL(emu); |
| 4719 | break; |
| 4720 | case 0xd4: |
| 4721 | x86emuOp_aam(emu); |
| 4722 | break; |
| 4723 | case 0xd5: |
| 4724 | x86emuOp_aad(emu); |
| 4725 | break; |
| 4726 | /* 0xd6 Undocumented SETALC instruction */ |
| 4727 | case 0xd7: |
| 4728 | x86emuOp_xlat(emu); |
| 4729 | break; |
| 4730 | case 0xd8: |
| 4731 | x86emuOp_esc_coprocess_d8(emu); |
| 4732 | break; |
| 4733 | case 0xd9: |
| 4734 | x86emuOp_esc_coprocess_d9(emu); |
| 4735 | break; |
| 4736 | case 0xda: |
| 4737 | x86emuOp_esc_coprocess_da(emu); |
| 4738 | break; |
| 4739 | case 0xdb: |
| 4740 | x86emuOp_esc_coprocess_db(emu); |
| 4741 | break; |
| 4742 | case 0xdc: |
| 4743 | x86emuOp_esc_coprocess_dc(emu); |
| 4744 | break; |
| 4745 | case 0xdd: |
| 4746 | x86emuOp_esc_coprocess_dd(emu); |
| 4747 | break; |
| 4748 | case 0xde: |
| 4749 | x86emuOp_esc_coprocess_de(emu); |
| 4750 | break; |
| 4751 | case 0xdf: |
| 4752 | x86emuOp_esc_coprocess_df(emu); |
| 4753 | break; |
| 4754 | |
| 4755 | case 0xe0: |
| 4756 | x86emuOp_loopne(emu); |
| 4757 | break; |
| 4758 | case 0xe1: |
| 4759 | x86emuOp_loope(emu); |
| 4760 | break; |
| 4761 | case 0xe2: |
| 4762 | x86emuOp_loop(emu); |
| 4763 | break; |
| 4764 | case 0xe3: |
| 4765 | x86emuOp_jcxz(emu); |
| 4766 | break; |
| 4767 | case 0xe4: |
| 4768 | x86emuOp_in_byte_AL_IMM(emu); |
| 4769 | break; |
| 4770 | case 0xe5: |
| 4771 | x86emuOp_in_word_AX_IMM(emu); |
| 4772 | break; |
| 4773 | case 0xe6: |
| 4774 | x86emuOp_out_byte_IMM_AL(emu); |
| 4775 | break; |
| 4776 | case 0xe7: |
| 4777 | x86emuOp_out_word_IMM_AX(emu); |
| 4778 | break; |
| 4779 | |
| 4780 | case 0xe8: |
| 4781 | x86emuOp_call_near_IMM(emu); |
| 4782 | break; |
| 4783 | case 0xe9: |
| 4784 | x86emuOp_jump_near_IMM(emu); |
| 4785 | break; |
| 4786 | case 0xea: |
| 4787 | x86emuOp_jump_far_IMM(emu); |
| 4788 | break; |
| 4789 | case 0xeb: |
| 4790 | x86emuOp_jump_byte_IMM(emu); |
| 4791 | break; |
| 4792 | case 0xec: |
| 4793 | x86emuOp_in_byte_AL_DX(emu); |
| 4794 | break; |
| 4795 | case 0xed: |
| 4796 | x86emuOp_in_word_AX_DX(emu); |
| 4797 | break; |
| 4798 | case 0xee: |
| 4799 | x86emuOp_out_byte_DX_AL(emu); |
| 4800 | break; |
| 4801 | case 0xef: |
| 4802 | x86emuOp_out_word_DX_AX(emu); |
| 4803 | break; |
| 4804 | |
| 4805 | case 0xf0: |
| 4806 | x86emuOp_lock(emu); |
| 4807 | break; |
| 4808 | case 0xf2: |
| 4809 | emu->x86.mode |= SYSMODE_PREFIX_REPNE; |
| 4810 | break; |
| 4811 | case 0xf3: |
| 4812 | emu->x86.mode |= SYSMODE_PREFIX_REPE; |
| 4813 | break; |
| 4814 | case 0xf4: |
| 4815 | X86EMU_halt_sys(emu); |
| 4816 | break; |
| 4817 | case 0xf5: |
| 4818 | x86emuOp_cmc(emu); |
| 4819 | break; |
| 4820 | case 0xf6: |
| 4821 | x86emuOp_opcF6_byte_RM(emu); |
| 4822 | break; |
| 4823 | case 0xf7: |
| 4824 | x86emuOp_opcF7_word_RM(emu); |
| 4825 | break; |
| 4826 | |
| 4827 | case 0xf8: |
| 4828 | CLEAR_FLAG(F_CF); |
| 4829 | break; |
| 4830 | case 0xf9: |
| 4831 | SET_FLAG(F_CF); |
| 4832 | break; |
| 4833 | case 0xfa: |
| 4834 | CLEAR_FLAG(F_IF); |
| 4835 | break; |
| 4836 | case 0xfb: |
| 4837 | SET_FLAG(F_IF); |
| 4838 | break; |
| 4839 | case 0xfc: |
| 4840 | CLEAR_FLAG(F_DF); |
| 4841 | break; |
| 4842 | case 0xfd: |
| 4843 | SET_FLAG(F_DF); |
| 4844 | break; |
| 4845 | case 0xfe: |
| 4846 | x86emuOp_opcFE_byte_RM(emu); |
| 4847 | break; |
| 4848 | case 0xff: |
| 4849 | x86emuOp_opcFF_word_RM(emu); |
| 4850 | break; |
| 4851 | default: |
| 4852 | X86EMU_halt_sys(emu); |
| 4853 | break; |
| 4854 | } |
| 4855 | if (op1 != 0x26 && op1 != 0x2e && op1 != 0x36 && op1 != 0x3e && |
| 4856 | (op1 | 3) != 0x67) |
| 4857 | emu->x86.mode &= ~SYSMODE_CLRMASK; |
| 4858 | } |
| 4859 | |
| 4860 | static void |
| 4861 | common_jmp_long(struct X86EMU *emu, bool cond) |
| 4862 | { |
| 4863 | int16_t target; |
| 4864 | |
| 4865 | target = (int16_t) fetch_word_imm(emu); |
| 4866 | target += (int16_t) emu->x86.R_IP; |
| 4867 | if (cond) |
| 4868 | emu->x86.R_IP = (uint16_t) target; |
| 4869 | } |
| 4870 | |
| 4871 | static void |
| 4872 | common_set_byte(struct X86EMU *emu, bool cond) |
| 4873 | { |
| 4874 | uint32_t destoffset; |
| 4875 | uint8_t *destreg, destval; |
| 4876 | |
| 4877 | fetch_decode_modrm(emu); |
| 4878 | destval = cond ? 0x01 : 0x00; |
| 4879 | if (emu->cur_mod != 3) { |
| 4880 | destoffset = decode_rl_address(emu); |
| 4881 | store_data_byte(emu, destoffset, destval); |
| 4882 | } else { |
| 4883 | destreg = decode_rl_byte_register(emu); |
| 4884 | *destreg = destval; |
| 4885 | } |
| 4886 | } |
| 4887 | |
| 4888 | static void |
| 4889 | common_bitstring32(struct X86EMU *emu, int op) |
| 4890 | { |
| 4891 | int bit; |
| 4892 | uint32_t srcval, *shiftreg, mask; |
| 4893 | |
| 4894 | fetch_decode_modrm(emu); |
| 4895 | shiftreg = decode_rh_long_register(emu); |
| 4896 | srcval = decode_and_fetch_long_disp(emu, (int16_t) *shiftreg >> 5); |
| 4897 | bit = *shiftreg & 0x1F; |
| 4898 | mask = 0x1 << bit; |
| 4899 | CONDITIONAL_SET_FLAG(srcval & mask, F_CF); |
| 4900 | |
| 4901 | switch (op) { |
| 4902 | case 0: |
| 4903 | break; |
| 4904 | case 1: |
| 4905 | write_back_long(emu, srcval | mask); |
| 4906 | break; |
| 4907 | case 2: |
| 4908 | write_back_long(emu, srcval & ~mask); |
| 4909 | break; |
| 4910 | case 3: |
| 4911 | write_back_long(emu, srcval ^ mask); |
| 4912 | break; |
| 4913 | } |
| 4914 | } |
| 4915 | |
| 4916 | static void |
| 4917 | common_bitstring16(struct X86EMU *emu, int op) |
| 4918 | { |
| 4919 | int bit; |
| 4920 | uint16_t srcval, *shiftreg, mask; |
| 4921 | |
| 4922 | fetch_decode_modrm(emu); |
| 4923 | shiftreg = decode_rh_word_register(emu); |
| 4924 | srcval = decode_and_fetch_word_disp(emu, (int16_t) *shiftreg >> 4); |
| 4925 | bit = *shiftreg & 0xF; |
| 4926 | mask = 0x1 << bit; |
| 4927 | CONDITIONAL_SET_FLAG(srcval & mask, F_CF); |
| 4928 | |
| 4929 | switch (op) { |
| 4930 | case 0: |
| 4931 | break; |
| 4932 | case 1: |
| 4933 | write_back_word(emu, srcval | mask); |
| 4934 | break; |
| 4935 | case 2: |
| 4936 | write_back_word(emu, srcval & ~mask); |
| 4937 | break; |
| 4938 | case 3: |
| 4939 | write_back_word(emu, srcval ^ mask); |
| 4940 | break; |
| 4941 | } |
| 4942 | } |
| 4943 | |
| 4944 | static void |
| 4945 | common_bitstring(struct X86EMU *emu, int op) |
| 4946 | { |
| 4947 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 4948 | common_bitstring32(emu, op); |
| 4949 | else |
| 4950 | common_bitstring16(emu, op); |
| 4951 | } |
| 4952 | |
| 4953 | static void |
| 4954 | common_bitsearch32(struct X86EMU *emu, int diff) |
| 4955 | { |
| 4956 | uint32_t srcval, *dstreg; |
| 4957 | |
| 4958 | fetch_decode_modrm(emu); |
| 4959 | dstreg = decode_rh_long_register(emu); |
| 4960 | srcval = decode_and_fetch_long(emu); |
| 4961 | CONDITIONAL_SET_FLAG(srcval == 0, F_ZF); |
| 4962 | for (*dstreg = 0; *dstreg < 32; *dstreg += diff) { |
| 4963 | if ((srcval >> *dstreg) & 1) |
| 4964 | break; |
| 4965 | } |
| 4966 | } |
| 4967 | |
| 4968 | static void |
| 4969 | common_bitsearch16(struct X86EMU *emu, int diff) |
| 4970 | { |
| 4971 | uint16_t srcval, *dstreg; |
| 4972 | |
| 4973 | fetch_decode_modrm(emu); |
| 4974 | dstreg = decode_rh_word_register(emu); |
| 4975 | srcval = decode_and_fetch_word(emu); |
| 4976 | CONDITIONAL_SET_FLAG(srcval == 0, F_ZF); |
| 4977 | for (*dstreg = 0; *dstreg < 16; *dstreg += diff) { |
| 4978 | if ((srcval >> *dstreg) & 1) |
| 4979 | break; |
| 4980 | } |
| 4981 | } |
| 4982 | |
| 4983 | static void |
| 4984 | common_bitsearch(struct X86EMU *emu, int diff) |
| 4985 | { |
| 4986 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 4987 | common_bitsearch32(emu, diff); |
| 4988 | else |
| 4989 | common_bitsearch16(emu, diff); |
| 4990 | } |
| 4991 | |
| 4992 | static void |
| 4993 | common_shift32(struct X86EMU *emu, bool shift_left, bool use_cl) |
| 4994 | { |
| 4995 | uint8_t shift; |
| 4996 | uint32_t destval, *shiftreg; |
| 4997 | |
| 4998 | fetch_decode_modrm(emu); |
| 4999 | shiftreg = decode_rh_long_register(emu); |
| 5000 | if (use_cl) { |
| 5001 | destval = decode_and_fetch_long(emu); |
| 5002 | shift = emu->x86.R_CL; |
| 5003 | } else { |
| 5004 | destval = decode_and_fetch_long_imm8(emu, &shift); |
| 5005 | } |
| 5006 | if (shift_left) |
| 5007 | destval = shld_long(emu, destval, *shiftreg, shift); |
| 5008 | else |
| 5009 | destval = shrd_long(emu, destval, *shiftreg, shift); |
| 5010 | write_back_long(emu, destval); |
| 5011 | } |
| 5012 | |
| 5013 | static void |
| 5014 | common_shift16(struct X86EMU *emu, bool shift_left, bool use_cl) |
| 5015 | { |
| 5016 | uint8_t shift; |
| 5017 | uint16_t destval, *shiftreg; |
| 5018 | |
| 5019 | fetch_decode_modrm(emu); |
| 5020 | shiftreg = decode_rh_word_register(emu); |
| 5021 | if (use_cl) { |
| 5022 | destval = decode_and_fetch_word(emu); |
| 5023 | shift = emu->x86.R_CL; |
| 5024 | } else { |
| 5025 | destval = decode_and_fetch_word_imm8(emu, &shift); |
| 5026 | } |
| 5027 | if (shift_left) |
| 5028 | destval = shld_word(emu, destval, *shiftreg, shift); |
| 5029 | else |
| 5030 | destval = shrd_word(emu, destval, *shiftreg, shift); |
| 5031 | write_back_word(emu, destval); |
| 5032 | } |
| 5033 | |
| 5034 | static void |
| 5035 | common_shift(struct X86EMU *emu, bool shift_left, bool use_cl) |
| 5036 | { |
| 5037 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 5038 | common_shift32(emu, shift_left, use_cl); |
| 5039 | else |
| 5040 | common_shift16(emu, shift_left, use_cl); |
| 5041 | } |
| 5042 | |
| 5043 | /*----------------------------- Implementation ----------------------------*/ |
| 5044 | #define xorl(a,b) ((a) && !(b)) || (!(a) && (b)) |
| 5045 | |
| 5046 | /**************************************************************************** |
| 5047 | REMARKS: |
| 5048 | Handles opcode 0x0f,0x31 |
| 5049 | ****************************************************************************/ |
| 5050 | static void |
| 5051 | x86emuOp2_rdtsc(struct X86EMU *emu) |
| 5052 | { |
| 5053 | emu->x86.R_EAX = emu->cur_cycles & 0xffffffff; |
| 5054 | emu->x86.R_EDX = emu->cur_cycles >> 32; |
| 5055 | } |
| 5056 | /**************************************************************************** |
| 5057 | REMARKS: |
| 5058 | Handles opcode 0x0f,0xa0 |
| 5059 | ****************************************************************************/ |
| 5060 | static void |
| 5061 | x86emuOp2_push_FS(struct X86EMU *emu) |
| 5062 | { |
| 5063 | push_word(emu, emu->x86.R_FS); |
| 5064 | } |
| 5065 | /**************************************************************************** |
| 5066 | REMARKS: |
| 5067 | Handles opcode 0x0f,0xa1 |
| 5068 | ****************************************************************************/ |
| 5069 | static void |
| 5070 | x86emuOp2_pop_FS(struct X86EMU *emu) |
| 5071 | { |
| 5072 | emu->x86.R_FS = pop_word(emu); |
| 5073 | } |
| 5074 | /**************************************************************************** |
| 5075 | REMARKS: |
| 5076 | Handles opcode 0x0f,0xa1 |
| 5077 | ****************************************************************************/ |
| 5078 | #if defined(__i386__) || defined(__amd64__) |
| 5079 | static void |
| 5080 | hw_cpuid(uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d) |
| 5081 | { |
| 5082 | __asm__ __volatile__("cpuid" |
| 5083 | : "=a" (*a), "=b" (*b), |
| 5084 | "=c" (*c), "=d" (*d) |
| 5085 | : "a" (*a), "c" (*c) |
| 5086 | : "cc" ); |
| 5087 | } |
| 5088 | #endif |
| 5089 | static void |
| 5090 | x86emuOp2_cpuid(struct X86EMU *emu) |
| 5091 | { |
| 5092 | #if defined(__i386__) || defined(__amd64__) |
| 5093 | hw_cpuid(&emu->x86.R_EAX, &emu->x86.R_EBX, &emu->x86.R_ECX, |
| 5094 | &emu->x86.R_EDX); |
| 5095 | #endif |
| 5096 | switch (emu->x86.R_EAX) { |
| 5097 | case 0: |
| 5098 | emu->x86.R_EAX = 1; |
| 5099 | #if !defined(__i386__) && !defined(__amd64__) |
| 5100 | /* "GenuineIntel" */ |
| 5101 | emu->x86.R_EBX = 0x756e6547; |
| 5102 | emu->x86.R_EDX = 0x49656e69; |
| 5103 | emu->x86.R_ECX = 0x6c65746e; |
| 5104 | #endif |
| 5105 | break; |
| 5106 | case 1: |
| 5107 | #if !defined(__i386__) && !defined(__amd64__) |
| 5108 | emu->x86.R_EAX = 0x00000480; |
| 5109 | emu->x86.R_EBX = emu->x86.R_ECX = 0; |
| 5110 | emu->x86.R_EDX = 0x00000002; |
| 5111 | #else |
| 5112 | emu->x86.R_EDX &= 0x00000012; |
| 5113 | #endif |
| 5114 | break; |
| 5115 | default: |
| 5116 | emu->x86.R_EAX = emu->x86.R_EBX = emu->x86.R_ECX = |
| 5117 | emu->x86.R_EDX = 0; |
| 5118 | break; |
| 5119 | } |
| 5120 | } |
| 5121 | /**************************************************************************** |
| 5122 | REMARKS: |
| 5123 | Handles opcode 0x0f,0xa3 |
| 5124 | ****************************************************************************/ |
| 5125 | static void |
| 5126 | x86emuOp2_bt_R(struct X86EMU *emu) |
| 5127 | { |
| 5128 | common_bitstring(emu, 0); |
| 5129 | } |
| 5130 | /**************************************************************************** |
| 5131 | REMARKS: |
| 5132 | Handles opcode 0x0f,0xa4 |
| 5133 | ****************************************************************************/ |
| 5134 | static void |
| 5135 | x86emuOp2_shld_IMM(struct X86EMU *emu) |
| 5136 | { |
| 5137 | common_shift(emu, true, false); |
| 5138 | } |
| 5139 | /**************************************************************************** |
| 5140 | REMARKS: |
| 5141 | Handles opcode 0x0f,0xa5 |
| 5142 | ****************************************************************************/ |
| 5143 | static void |
| 5144 | x86emuOp2_shld_CL(struct X86EMU *emu) |
| 5145 | { |
| 5146 | common_shift(emu, true, true); |
| 5147 | } |
| 5148 | /**************************************************************************** |
| 5149 | REMARKS: |
| 5150 | Handles opcode 0x0f,0xa8 |
| 5151 | ****************************************************************************/ |
| 5152 | static void |
| 5153 | x86emuOp2_push_GS(struct X86EMU *emu) |
| 5154 | { |
| 5155 | push_word(emu, emu->x86.R_GS); |
| 5156 | } |
| 5157 | /**************************************************************************** |
| 5158 | REMARKS: |
| 5159 | Handles opcode 0x0f,0xa9 |
| 5160 | ****************************************************************************/ |
| 5161 | static void |
| 5162 | x86emuOp2_pop_GS(struct X86EMU *emu) |
| 5163 | { |
| 5164 | emu->x86.R_GS = pop_word(emu); |
| 5165 | } |
| 5166 | /**************************************************************************** |
| 5167 | REMARKS: |
| 5168 | Handles opcode 0x0f,0xab |
| 5169 | ****************************************************************************/ |
| 5170 | static void |
| 5171 | x86emuOp2_bts_R(struct X86EMU *emu) |
| 5172 | { |
| 5173 | common_bitstring(emu, 1); |
| 5174 | } |
| 5175 | /**************************************************************************** |
| 5176 | REMARKS: |
| 5177 | Handles opcode 0x0f,0xac |
| 5178 | ****************************************************************************/ |
| 5179 | static void |
| 5180 | x86emuOp2_shrd_IMM(struct X86EMU *emu) |
| 5181 | { |
| 5182 | common_shift(emu, false, false); |
| 5183 | } |
| 5184 | /**************************************************************************** |
| 5185 | REMARKS: |
| 5186 | Handles opcode 0x0f,0xad |
| 5187 | ****************************************************************************/ |
| 5188 | static void |
| 5189 | x86emuOp2_shrd_CL(struct X86EMU *emu) |
| 5190 | { |
| 5191 | common_shift(emu, false, true); |
| 5192 | } |
| 5193 | /**************************************************************************** |
| 5194 | REMARKS: |
| 5195 | Handles opcode 0x0f,0xaf |
| 5196 | ****************************************************************************/ |
| 5197 | static void |
| 5198 | x86emuOp2_32_imul_R_RM(struct X86EMU *emu) |
| 5199 | { |
| 5200 | uint32_t *destreg, srcval; |
| 5201 | uint64_t res; |
| 5202 | |
| 5203 | fetch_decode_modrm(emu); |
| 5204 | destreg = decode_rh_long_register(emu); |
| 5205 | srcval = decode_and_fetch_long(emu); |
| 5206 | res = (int32_t) *destreg * (int32_t)srcval; |
| 5207 | if (res > 0xffffffff) { |
| 5208 | SET_FLAG(F_CF); |
| 5209 | SET_FLAG(F_OF); |
| 5210 | } else { |
| 5211 | CLEAR_FLAG(F_CF); |
| 5212 | CLEAR_FLAG(F_OF); |
| 5213 | } |
| 5214 | *destreg = (uint32_t) res; |
| 5215 | } |
| 5216 | |
| 5217 | static void |
| 5218 | x86emuOp2_16_imul_R_RM(struct X86EMU *emu) |
| 5219 | { |
| 5220 | uint16_t *destreg, srcval; |
| 5221 | uint32_t res; |
| 5222 | |
| 5223 | fetch_decode_modrm(emu); |
| 5224 | destreg = decode_rh_word_register(emu); |
| 5225 | srcval = decode_and_fetch_word(emu); |
| 5226 | res = (int16_t) * destreg * (int16_t)srcval; |
| 5227 | if (res > 0xFFFF) { |
| 5228 | SET_FLAG(F_CF); |
| 5229 | SET_FLAG(F_OF); |
| 5230 | } else { |
| 5231 | CLEAR_FLAG(F_CF); |
| 5232 | CLEAR_FLAG(F_OF); |
| 5233 | } |
| 5234 | *destreg = (uint16_t) res; |
| 5235 | } |
| 5236 | |
| 5237 | static void |
| 5238 | x86emuOp2_imul_R_RM(struct X86EMU *emu) |
| 5239 | { |
| 5240 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 5241 | x86emuOp2_32_imul_R_RM(emu); |
| 5242 | else |
| 5243 | x86emuOp2_16_imul_R_RM(emu); |
| 5244 | } |
| 5245 | /**************************************************************************** |
| 5246 | REMARKS: |
| 5247 | Handles opcode 0x0f,0xb2 |
| 5248 | ****************************************************************************/ |
| 5249 | static void |
| 5250 | x86emuOp2_lss_R_IMM(struct X86EMU *emu) |
| 5251 | { |
| 5252 | common_load_far_pointer(emu, &emu->x86.R_SS); |
| 5253 | } |
| 5254 | /**************************************************************************** |
| 5255 | REMARKS: |
| 5256 | Handles opcode 0x0f,0xb3 |
| 5257 | ****************************************************************************/ |
| 5258 | static void |
| 5259 | x86emuOp2_btr_R(struct X86EMU *emu) |
| 5260 | { |
| 5261 | common_bitstring(emu, 2); |
| 5262 | } |
| 5263 | /**************************************************************************** |
| 5264 | REMARKS: |
| 5265 | Handles opcode 0x0f,0xb4 |
| 5266 | ****************************************************************************/ |
| 5267 | static void |
| 5268 | x86emuOp2_lfs_R_IMM(struct X86EMU *emu) |
| 5269 | { |
| 5270 | common_load_far_pointer(emu, &emu->x86.R_FS); |
| 5271 | } |
| 5272 | /**************************************************************************** |
| 5273 | REMARKS: |
| 5274 | Handles opcode 0x0f,0xb5 |
| 5275 | ****************************************************************************/ |
| 5276 | static void |
| 5277 | x86emuOp2_lgs_R_IMM(struct X86EMU *emu) |
| 5278 | { |
| 5279 | common_load_far_pointer(emu, &emu->x86.R_GS); |
| 5280 | } |
| 5281 | /**************************************************************************** |
| 5282 | REMARKS: |
| 5283 | Handles opcode 0x0f,0xb6 |
| 5284 | ****************************************************************************/ |
| 5285 | static void |
| 5286 | x86emuOp2_32_movzx_byte_R_RM(struct X86EMU *emu) |
| 5287 | { |
| 5288 | uint32_t *destreg; |
| 5289 | |
| 5290 | fetch_decode_modrm(emu); |
| 5291 | destreg = decode_rh_long_register(emu); |
| 5292 | *destreg = decode_and_fetch_byte(emu); |
| 5293 | } |
| 5294 | |
| 5295 | static void |
| 5296 | x86emuOp2_16_movzx_byte_R_RM(struct X86EMU *emu) |
| 5297 | { |
| 5298 | uint16_t *destreg; |
| 5299 | |
| 5300 | fetch_decode_modrm(emu); |
| 5301 | destreg = decode_rh_word_register(emu); |
| 5302 | *destreg = decode_and_fetch_byte(emu); |
| 5303 | } |
| 5304 | |
| 5305 | static void |
| 5306 | x86emuOp2_movzx_byte_R_RM(struct X86EMU *emu) |
| 5307 | { |
| 5308 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 5309 | x86emuOp2_32_movzx_byte_R_RM(emu); |
| 5310 | else |
| 5311 | x86emuOp2_16_movzx_byte_R_RM(emu); |
| 5312 | } |
| 5313 | /**************************************************************************** |
| 5314 | REMARKS: |
| 5315 | Handles opcode 0x0f,0xb7 |
| 5316 | ****************************************************************************/ |
| 5317 | static void |
| 5318 | x86emuOp2_movzx_word_R_RM(struct X86EMU *emu) |
| 5319 | { |
| 5320 | uint32_t *destreg; |
| 5321 | |
| 5322 | fetch_decode_modrm(emu); |
| 5323 | destreg = decode_rh_long_register(emu); |
| 5324 | *destreg = decode_and_fetch_word(emu); |
| 5325 | } |
| 5326 | /**************************************************************************** |
| 5327 | REMARKS: |
| 5328 | Handles opcode 0x0f,0xba |
| 5329 | ****************************************************************************/ |
| 5330 | static void |
| 5331 | x86emuOp2_32_btX_I(struct X86EMU *emu) |
| 5332 | { |
| 5333 | int bit; |
| 5334 | uint32_t srcval, mask; |
| 5335 | uint8_t shift; |
| 5336 | |
| 5337 | fetch_decode_modrm(emu); |
| 5338 | if (emu->cur_rh < 4) |
| 5339 | X86EMU_halt_sys(emu); |
| 5340 | |
| 5341 | srcval = decode_and_fetch_long_imm8(emu, &shift); |
| 5342 | bit = shift & 0x1F; |
| 5343 | mask = (0x1 << bit); |
| 5344 | |
| 5345 | switch (emu->cur_rh) { |
| 5346 | case 5: |
| 5347 | write_back_long(emu, srcval | mask); |
| 5348 | break; |
| 5349 | case 6: |
| 5350 | write_back_long(emu, srcval & ~mask); |
| 5351 | break; |
| 5352 | case 7: |
| 5353 | write_back_long(emu, srcval ^ mask); |
| 5354 | break; |
| 5355 | } |
| 5356 | CONDITIONAL_SET_FLAG(srcval & mask, F_CF); |
| 5357 | } |
| 5358 | |
| 5359 | static void |
| 5360 | x86emuOp2_16_btX_I(struct X86EMU *emu) |
| 5361 | { |
| 5362 | int bit; |
| 5363 | |
| 5364 | uint16_t srcval, mask; |
| 5365 | uint8_t shift; |
| 5366 | |
| 5367 | fetch_decode_modrm(emu); |
| 5368 | if (emu->cur_rh < 4) |
| 5369 | X86EMU_halt_sys(emu); |
| 5370 | |
| 5371 | srcval = decode_and_fetch_word_imm8(emu, &shift); |
| 5372 | bit = shift & 0xF; |
| 5373 | mask = (0x1 << bit); |
| 5374 | switch (emu->cur_rh) { |
| 5375 | case 5: |
| 5376 | write_back_word(emu, srcval | mask); |
| 5377 | break; |
| 5378 | case 6: |
| 5379 | write_back_word(emu, srcval & ~mask); |
| 5380 | break; |
| 5381 | case 7: |
| 5382 | write_back_word(emu, srcval ^ mask); |
| 5383 | break; |
| 5384 | } |
| 5385 | CONDITIONAL_SET_FLAG(srcval & mask, F_CF); |
| 5386 | } |
| 5387 | |
| 5388 | static void |
| 5389 | x86emuOp2_btX_I(struct X86EMU *emu) |
| 5390 | { |
| 5391 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 5392 | x86emuOp2_32_btX_I(emu); |
| 5393 | else |
| 5394 | x86emuOp2_16_btX_I(emu); |
| 5395 | } |
| 5396 | /**************************************************************************** |
| 5397 | REMARKS: |
| 5398 | Handles opcode 0x0f,0xbb |
| 5399 | ****************************************************************************/ |
| 5400 | static void |
| 5401 | x86emuOp2_btc_R(struct X86EMU *emu) |
| 5402 | { |
| 5403 | common_bitstring(emu, 3); |
| 5404 | } |
| 5405 | /**************************************************************************** |
| 5406 | REMARKS: |
| 5407 | Handles opcode 0x0f,0xbc |
| 5408 | ****************************************************************************/ |
| 5409 | static void |
| 5410 | x86emuOp2_bsf(struct X86EMU *emu) |
| 5411 | { |
| 5412 | common_bitsearch(emu, +1); |
| 5413 | } |
| 5414 | /**************************************************************************** |
| 5415 | REMARKS: |
| 5416 | Handles opcode 0x0f,0xbd |
| 5417 | ****************************************************************************/ |
| 5418 | static void |
| 5419 | x86emuOp2_bsr(struct X86EMU *emu) |
| 5420 | { |
| 5421 | common_bitsearch(emu, -1); |
| 5422 | } |
| 5423 | /**************************************************************************** |
| 5424 | REMARKS: |
| 5425 | Handles opcode 0x0f,0xbe |
| 5426 | ****************************************************************************/ |
| 5427 | static void |
| 5428 | x86emuOp2_32_movsx_byte_R_RM(struct X86EMU *emu) |
| 5429 | { |
| 5430 | uint32_t *destreg; |
| 5431 | |
| 5432 | fetch_decode_modrm(emu); |
| 5433 | destreg = decode_rh_long_register(emu); |
| 5434 | *destreg = (int32_t)(int8_t)decode_and_fetch_byte(emu); |
| 5435 | } |
| 5436 | |
| 5437 | static void |
| 5438 | x86emuOp2_16_movsx_byte_R_RM(struct X86EMU *emu) |
| 5439 | { |
| 5440 | uint16_t *destreg; |
| 5441 | |
| 5442 | fetch_decode_modrm(emu); |
| 5443 | destreg = decode_rh_word_register(emu); |
| 5444 | *destreg = (int16_t)(int8_t)decode_and_fetch_byte(emu); |
| 5445 | } |
| 5446 | |
| 5447 | static void |
| 5448 | x86emuOp2_movsx_byte_R_RM(struct X86EMU *emu) |
| 5449 | { |
| 5450 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) |
| 5451 | x86emuOp2_32_movsx_byte_R_RM(emu); |
| 5452 | else |
| 5453 | x86emuOp2_16_movsx_byte_R_RM(emu); |
| 5454 | } |
| 5455 | /**************************************************************************** |
| 5456 | REMARKS: |
| 5457 | Handles opcode 0x0f,0xbf |
| 5458 | ****************************************************************************/ |
| 5459 | static void |
| 5460 | x86emuOp2_movsx_word_R_RM(struct X86EMU *emu) |
| 5461 | { |
| 5462 | uint32_t *destreg; |
| 5463 | |
| 5464 | fetch_decode_modrm(emu); |
| 5465 | destreg = decode_rh_long_register(emu); |
| 5466 | *destreg = (int32_t)(int16_t)decode_and_fetch_word(emu); |
| 5467 | } |
| 5468 | |
| 5469 | static void |
| 5470 | X86EMU_exec_two_byte(struct X86EMU * emu) |
| 5471 | { |
| 5472 | uint8_t op2; |
| 5473 | |
| 5474 | op2 = fetch_byte_imm(emu); |
| 5475 | |
| 5476 | switch (op2) { |
| 5477 | /* 0x00 Group F (ring 0 PM) */ |
| 5478 | /* 0x01 Group G (ring 0 PM) */ |
| 5479 | /* 0x02 lar (ring 0 PM) */ |
| 5480 | /* 0x03 lsl (ring 0 PM) */ |
| 5481 | /* 0x05 loadall (undocumented) */ |
| 5482 | /* 0x06 clts (ring 0 PM) */ |
| 5483 | /* 0x07 loadall (undocumented) */ |
| 5484 | /* 0x08 invd (ring 0 PM) */ |
| 5485 | /* 0x09 wbinvd (ring 0 PM) */ |
| 5486 | |
| 5487 | /* 0x20 mov reg32(op2); break;creg (ring 0 PM) */ |
| 5488 | /* 0x21 mov reg32(op2); break;dreg (ring 0 PM) */ |
| 5489 | /* 0x22 mov creg(op2); break;reg32 (ring 0 PM) */ |
| 5490 | /* 0x23 mov dreg(op2); break;reg32 (ring 0 PM) */ |
| 5491 | /* 0x24 mov reg32(op2); break;treg (ring 0 PM) */ |
| 5492 | /* 0x26 mov treg(op2); break;reg32 (ring 0 PM) */ |
| 5493 | |
| 5494 | case 0x31: |
| 5495 | x86emuOp2_rdtsc(emu); |
| 5496 | break; |
| 5497 | |
| 5498 | case 0x80: |
| 5499 | common_jmp_long(emu, ACCESS_FLAG(F_OF)); |
| 5500 | break; |
| 5501 | case 0x81: |
| 5502 | common_jmp_long(emu, !ACCESS_FLAG(F_OF)); |
| 5503 | break; |
| 5504 | case 0x82: |
| 5505 | common_jmp_long(emu, ACCESS_FLAG(F_CF)); |
| 5506 | break; |
| 5507 | case 0x83: |
| 5508 | common_jmp_long(emu, !ACCESS_FLAG(F_CF)); |
| 5509 | break; |
| 5510 | case 0x84: |
| 5511 | common_jmp_long(emu, ACCESS_FLAG(F_ZF)); |
| 5512 | break; |
| 5513 | case 0x85: |
| 5514 | common_jmp_long(emu, !ACCESS_FLAG(F_ZF)); |
| 5515 | break; |
| 5516 | case 0x86: |
| 5517 | common_jmp_long(emu, ACCESS_FLAG(F_CF) || ACCESS_FLAG(F_ZF)); |
| 5518 | break; |
| 5519 | case 0x87: |
| 5520 | common_jmp_long(emu, !(ACCESS_FLAG(F_CF) || ACCESS_FLAG(F_ZF))); |
| 5521 | break; |
| 5522 | case 0x88: |
| 5523 | common_jmp_long(emu, ACCESS_FLAG(F_SF)); |
| 5524 | break; |
| 5525 | case 0x89: |
| 5526 | common_jmp_long(emu, !ACCESS_FLAG(F_SF)); |
| 5527 | break; |
| 5528 | case 0x8a: |
| 5529 | common_jmp_long(emu, ACCESS_FLAG(F_PF)); |
| 5530 | break; |
| 5531 | case 0x8b: |
| 5532 | common_jmp_long(emu, !ACCESS_FLAG(F_PF)); |
| 5533 | break; |
| 5534 | case 0x8c: |
| 5535 | common_jmp_long(emu, xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF))); |
| 5536 | break; |
| 5537 | case 0x8d: |
| 5538 | common_jmp_long(emu, !(xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)))); |
| 5539 | break; |
| 5540 | case 0x8e: |
| 5541 | common_jmp_long(emu, |
| 5542 | (xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)) || ACCESS_FLAG(F_ZF))); |
| 5543 | break; |
| 5544 | case 0x8f: |
| 5545 | common_jmp_long(emu, |
| 5546 | !(xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)) || ACCESS_FLAG(F_ZF))); |
| 5547 | break; |
| 5548 | |
| 5549 | case 0x90: |
| 5550 | common_set_byte(emu, ACCESS_FLAG(F_OF)); |
| 5551 | break; |
| 5552 | case 0x91: |
| 5553 | common_set_byte(emu, !ACCESS_FLAG(F_OF)); |
| 5554 | break; |
| 5555 | case 0x92: |
| 5556 | common_set_byte(emu, ACCESS_FLAG(F_CF)); |
| 5557 | break; |
| 5558 | case 0x93: |
| 5559 | common_set_byte(emu, !ACCESS_FLAG(F_CF)); |
| 5560 | break; |
| 5561 | case 0x94: |
| 5562 | common_set_byte(emu, ACCESS_FLAG(F_ZF)); |
| 5563 | break; |
| 5564 | case 0x95: |
| 5565 | common_set_byte(emu, !ACCESS_FLAG(F_ZF)); |
| 5566 | break; |
| 5567 | case 0x96: |
| 5568 | common_set_byte(emu, ACCESS_FLAG(F_CF) || ACCESS_FLAG(F_ZF)); |
| 5569 | break; |
| 5570 | case 0x97: |
| 5571 | common_set_byte(emu, !(ACCESS_FLAG(F_CF) || ACCESS_FLAG(F_ZF))); |
| 5572 | break; |
| 5573 | case 0x98: |
| 5574 | common_set_byte(emu, ACCESS_FLAG(F_SF)); |
| 5575 | break; |
| 5576 | case 0x99: |
| 5577 | common_set_byte(emu, !ACCESS_FLAG(F_SF)); |
| 5578 | break; |
| 5579 | case 0x9a: |
| 5580 | common_set_byte(emu, ACCESS_FLAG(F_PF)); |
| 5581 | break; |
| 5582 | case 0x9b: |
| 5583 | common_set_byte(emu, !ACCESS_FLAG(F_PF)); |
| 5584 | break; |
| 5585 | case 0x9c: |
| 5586 | common_set_byte(emu, xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF))); |
| 5587 | break; |
| 5588 | case 0x9d: |
| 5589 | common_set_byte(emu, xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF))); |
| 5590 | break; |
| 5591 | case 0x9e: |
| 5592 | common_set_byte(emu, |
| 5593 | (xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)) || |
| 5594 | ACCESS_FLAG(F_ZF))); |
| 5595 | break; |
| 5596 | case 0x9f: |
| 5597 | common_set_byte(emu, |
| 5598 | !(xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)) || |
| 5599 | ACCESS_FLAG(F_ZF))); |
| 5600 | break; |
| 5601 | |
| 5602 | case 0xa0: |
| 5603 | x86emuOp2_push_FS(emu); |
| 5604 | break; |
| 5605 | case 0xa1: |
| 5606 | x86emuOp2_pop_FS(emu); |
| 5607 | break; |
| 5608 | case 0xa2: |
| 5609 | x86emuOp2_cpuid(emu); |
| 5610 | break; |
| 5611 | case 0xa3: |
| 5612 | x86emuOp2_bt_R(emu); |
| 5613 | break; |
| 5614 | case 0xa4: |
| 5615 | x86emuOp2_shld_IMM(emu); |
| 5616 | break; |
| 5617 | case 0xa5: |
| 5618 | x86emuOp2_shld_CL(emu); |
| 5619 | break; |
| 5620 | case 0xa8: |
| 5621 | x86emuOp2_push_GS(emu); |
| 5622 | break; |
| 5623 | case 0xa9: |
| 5624 | x86emuOp2_pop_GS(emu); |
| 5625 | break; |
| 5626 | case 0xab: |
| 5627 | x86emuOp2_bts_R(emu); |
| 5628 | break; |
| 5629 | case 0xac: |
| 5630 | x86emuOp2_shrd_IMM(emu); |
| 5631 | break; |
| 5632 | case 0xad: |
| 5633 | x86emuOp2_shrd_CL(emu); |
| 5634 | break; |
| 5635 | case 0xaf: |
| 5636 | x86emuOp2_imul_R_RM(emu); |
| 5637 | break; |
| 5638 | |
| 5639 | /* 0xb0 TODO: cmpxchg */ |
| 5640 | /* 0xb1 TODO: cmpxchg */ |
| 5641 | case 0xb2: |
| 5642 | x86emuOp2_lss_R_IMM(emu); |
| 5643 | break; |
| 5644 | case 0xb3: |
| 5645 | x86emuOp2_btr_R(emu); |
| 5646 | break; |
| 5647 | case 0xb4: |
| 5648 | x86emuOp2_lfs_R_IMM(emu); |
| 5649 | break; |
| 5650 | case 0xb5: |
| 5651 | x86emuOp2_lgs_R_IMM(emu); |
| 5652 | break; |
| 5653 | case 0xb6: |
| 5654 | x86emuOp2_movzx_byte_R_RM(emu); |
| 5655 | break; |
| 5656 | case 0xb7: |
| 5657 | x86emuOp2_movzx_word_R_RM(emu); |
| 5658 | break; |
| 5659 | case 0xba: |
| 5660 | x86emuOp2_btX_I(emu); |
| 5661 | break; |
| 5662 | case 0xbb: |
| 5663 | x86emuOp2_btc_R(emu); |
| 5664 | break; |
| 5665 | case 0xbc: |
| 5666 | x86emuOp2_bsf(emu); |
| 5667 | break; |
| 5668 | case 0xbd: |
| 5669 | x86emuOp2_bsr(emu); |
| 5670 | break; |
| 5671 | case 0xbe: |
| 5672 | x86emuOp2_movsx_byte_R_RM(emu); |
| 5673 | break; |
| 5674 | case 0xbf: |
| 5675 | x86emuOp2_movsx_word_R_RM(emu); |
| 5676 | break; |
| 5677 | |
| 5678 | /* 0xc0 TODO: xadd */ |
| 5679 | /* 0xc1 TODO: xadd */ |
| 5680 | /* 0xc8 TODO: bswap */ |
| 5681 | /* 0xc9 TODO: bswap */ |
| 5682 | /* 0xca TODO: bswap */ |
| 5683 | /* 0xcb TODO: bswap */ |
| 5684 | /* 0xcc TODO: bswap */ |
| 5685 | /* 0xcd TODO: bswap */ |
| 5686 | /* 0xce TODO: bswap */ |
| 5687 | /* 0xcf TODO: bswap */ |
| 5688 | |
| 5689 | default: |
| 5690 | X86EMU_halt_sys(emu); |
| 5691 | break; |
| 5692 | } |
| 5693 | } |
| 5694 | |
| 5695 | /* |
| 5696 | * Carry Chain Calculation |
| 5697 | * |
| 5698 | * This represents a somewhat expensive calculation which is |
| 5699 | * apparently required to emulate the setting of the OF and AF flag. |
| 5700 | * The latter is not so important, but the former is. The overflow |
| 5701 | * flag is the XOR of the top two bits of the carry chain for an |
| 5702 | * addition (similar for subtraction). Since we do not want to |
| 5703 | * simulate the addition in a bitwise manner, we try to calculate the |
| 5704 | * carry chain given the two operands and the result. |
| 5705 | * |
| 5706 | * So, given the following table, which represents the addition of two |
| 5707 | * bits, we can derive a formula for the carry chain. |
| 5708 | * |
| 5709 | * a b cin r cout |
| 5710 | * 0 0 0 0 0 |
| 5711 | * 0 0 1 1 0 |
| 5712 | * 0 1 0 1 0 |
| 5713 | * 0 1 1 0 1 |
| 5714 | * 1 0 0 1 0 |
| 5715 | * 1 0 1 0 1 |
| 5716 | * 1 1 0 0 1 |
| 5717 | * 1 1 1 1 1 |
| 5718 | * |
| 5719 | * Construction of table for cout: |
| 5720 | * |
| 5721 | * ab |
| 5722 | * r \ 00 01 11 10 |
| 5723 | * |------------------ |
| 5724 | * 0 | 0 1 1 1 |
| 5725 | * 1 | 0 0 1 0 |
| 5726 | * |
| 5727 | * By inspection, one gets: cc = ab + r'(a + b) |
| 5728 | * |
| 5729 | * That represents alot of operations, but NO CHOICE.... |
| 5730 | * |
| 5731 | * Borrow Chain Calculation. |
| 5732 | * |
| 5733 | * The following table represents the subtraction of two bits, from |
| 5734 | * which we can derive a formula for the borrow chain. |
| 5735 | * |
| 5736 | * a b bin r bout |
| 5737 | * 0 0 0 0 0 |
| 5738 | * 0 0 1 1 1 |
| 5739 | * 0 1 0 1 1 |
| 5740 | * 0 1 1 0 1 |
| 5741 | * 1 0 0 1 0 |
| 5742 | * 1 0 1 0 0 |
| 5743 | * 1 1 0 0 0 |
| 5744 | * 1 1 1 1 1 |
| 5745 | * |
| 5746 | * Construction of table for cout: |
| 5747 | * |
| 5748 | * ab |
| 5749 | * r \ 00 01 11 10 |
| 5750 | * |------------------ |
| 5751 | * 0 | 0 1 0 0 |
| 5752 | * 1 | 1 1 1 0 |
| 5753 | * |
| 5754 | * By inspection, one gets: bc = a'b + r(a' + b) |
| 5755 | * |
| 5756 | ****************************************************************************/ |
| 5757 | |
| 5758 | /*------------------------- Global Variables ------------------------------*/ |
| 5759 | |
| 5760 | static uint32_t x86emu_parity_tab[8] = |
| 5761 | { |
| 5762 | 0x96696996, |
| 5763 | 0x69969669, |
| 5764 | 0x69969669, |
| 5765 | 0x96696996, |
| 5766 | 0x69969669, |
| 5767 | 0x96696996, |
| 5768 | 0x96696996, |
| 5769 | 0x69969669, |
| 5770 | }; |
| 5771 | #define PARITY(x) (((x86emu_parity_tab[(x) / 32] >> ((x) % 32)) & 1) == 0) |
| 5772 | #define XOR2(x) (((x) ^ ((x)>>1)) & 0x1) |
| 5773 | |
| 5774 | /**************************************************************************** |
| 5775 | REMARKS: |
| 5776 | Implements the AAA instruction and side effects. |
| 5777 | ****************************************************************************/ |
| 5778 | static uint16_t |
| 5779 | aaa_word(struct X86EMU *emu, uint16_t d) |
| 5780 | { |
| 5781 | uint16_t res; |
| 5782 | if ((d & 0xf) > 0x9 || ACCESS_FLAG(F_AF)) { |
| 5783 | d += 0x6; |
| 5784 | d += 0x100; |
| 5785 | SET_FLAG(F_AF); |
| 5786 | SET_FLAG(F_CF); |
| 5787 | } else { |
| 5788 | CLEAR_FLAG(F_CF); |
| 5789 | CLEAR_FLAG(F_AF); |
| 5790 | } |
| 5791 | res = (uint16_t) (d & 0xFF0F); |
| 5792 | CLEAR_FLAG(F_SF); |
| 5793 | CONDITIONAL_SET_FLAG(res == 0, F_ZF); |
| 5794 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 5795 | return res; |
| 5796 | } |
| 5797 | /**************************************************************************** |
| 5798 | REMARKS: |
| 5799 | Implements the AAA instruction and side effects. |
| 5800 | ****************************************************************************/ |
| 5801 | static uint16_t |
| 5802 | aas_word(struct X86EMU *emu, uint16_t d) |
| 5803 | { |
| 5804 | uint16_t res; |
| 5805 | if ((d & 0xf) > 0x9 || ACCESS_FLAG(F_AF)) { |
| 5806 | d -= 0x6; |
| 5807 | d -= 0x100; |
| 5808 | SET_FLAG(F_AF); |
| 5809 | SET_FLAG(F_CF); |
| 5810 | } else { |
| 5811 | CLEAR_FLAG(F_CF); |
| 5812 | CLEAR_FLAG(F_AF); |
| 5813 | } |
| 5814 | res = (uint16_t) (d & 0xFF0F); |
| 5815 | CLEAR_FLAG(F_SF); |
| 5816 | CONDITIONAL_SET_FLAG(res == 0, F_ZF); |
| 5817 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 5818 | return res; |
| 5819 | } |
| 5820 | /**************************************************************************** |
| 5821 | REMARKS: |
| 5822 | Implements the AAD instruction and side effects. |
| 5823 | ****************************************************************************/ |
| 5824 | static uint16_t |
| 5825 | aad_word(struct X86EMU *emu, uint16_t d) |
| 5826 | { |
| 5827 | uint16_t l; |
| 5828 | uint8_t hb, lb; |
| 5829 | |
| 5830 | hb = (uint8_t) ((d >> 8) & 0xff); |
| 5831 | lb = (uint8_t) ((d & 0xff)); |
| 5832 | l = (uint16_t) ((lb + 10 * hb) & 0xFF); |
| 5833 | |
| 5834 | CLEAR_FLAG(F_CF); |
| 5835 | CLEAR_FLAG(F_AF); |
| 5836 | CLEAR_FLAG(F_OF); |
| 5837 | CONDITIONAL_SET_FLAG(l & 0x80, F_SF); |
| 5838 | CONDITIONAL_SET_FLAG(l == 0, F_ZF); |
| 5839 | CONDITIONAL_SET_FLAG(PARITY(l & 0xff), F_PF); |
| 5840 | return l; |
| 5841 | } |
| 5842 | /**************************************************************************** |
| 5843 | REMARKS: |
| 5844 | Implements the AAM instruction and side effects. |
| 5845 | ****************************************************************************/ |
| 5846 | static uint16_t |
| 5847 | aam_word(struct X86EMU *emu, uint8_t d) |
| 5848 | { |
| 5849 | uint16_t h, l; |
| 5850 | |
| 5851 | h = (uint16_t) (d / 10); |
| 5852 | l = (uint16_t) (d % 10); |
| 5853 | l |= (uint16_t) (h << 8); |
| 5854 | |
| 5855 | CLEAR_FLAG(F_CF); |
| 5856 | CLEAR_FLAG(F_AF); |
| 5857 | CLEAR_FLAG(F_OF); |
| 5858 | CONDITIONAL_SET_FLAG(l & 0x80, F_SF); |
| 5859 | CONDITIONAL_SET_FLAG(l == 0, F_ZF); |
| 5860 | CONDITIONAL_SET_FLAG(PARITY(l & 0xff), F_PF); |
| 5861 | return l; |
| 5862 | } |
| 5863 | /**************************************************************************** |
| 5864 | REMARKS: |
| 5865 | Implements the ADC instruction and side effects. |
| 5866 | ****************************************************************************/ |
| 5867 | static uint8_t |
| 5868 | adc_byte(struct X86EMU *emu, uint8_t d, uint8_t s) |
| 5869 | { |
| 5870 | uint32_t res; /* all operands in native machine order */ |
| 5871 | uint32_t cc; |
| 5872 | |
| 5873 | if (ACCESS_FLAG(F_CF)) |
| 5874 | res = 1 + d + s; |
| 5875 | else |
| 5876 | res = d + s; |
| 5877 | |
| 5878 | CONDITIONAL_SET_FLAG(res & 0x100, F_CF); |
| 5879 | CONDITIONAL_SET_FLAG((res & 0xff) == 0, F_ZF); |
| 5880 | CONDITIONAL_SET_FLAG(res & 0x80, F_SF); |
| 5881 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 5882 | |
| 5883 | /* calculate the carry chain SEE NOTE AT TOP. */ |
| 5884 | cc = (s & d) | ((~res) & (s | d)); |
| 5885 | CONDITIONAL_SET_FLAG(XOR2(cc >> 6), F_OF); |
| 5886 | CONDITIONAL_SET_FLAG(cc & 0x8, F_AF); |
| 5887 | return (uint8_t) res; |
| 5888 | } |
| 5889 | /**************************************************************************** |
| 5890 | REMARKS: |
| 5891 | Implements the ADC instruction and side effects. |
| 5892 | ****************************************************************************/ |
| 5893 | static uint16_t |
| 5894 | adc_word(struct X86EMU *emu, uint16_t d, uint16_t s) |
| 5895 | { |
| 5896 | uint32_t res; /* all operands in native machine order */ |
| 5897 | uint32_t cc; |
| 5898 | |
| 5899 | if (ACCESS_FLAG(F_CF)) |
| 5900 | res = 1 + d + s; |
| 5901 | else |
| 5902 | res = d + s; |
| 5903 | |
| 5904 | CONDITIONAL_SET_FLAG(res & 0x10000, F_CF); |
| 5905 | CONDITIONAL_SET_FLAG((res & 0xffff) == 0, F_ZF); |
| 5906 | CONDITIONAL_SET_FLAG(res & 0x8000, F_SF); |
| 5907 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 5908 | |
| 5909 | /* calculate the carry chain SEE NOTE AT TOP. */ |
| 5910 | cc = (s & d) | ((~res) & (s | d)); |
| 5911 | CONDITIONAL_SET_FLAG(XOR2(cc >> 14), F_OF); |
| 5912 | CONDITIONAL_SET_FLAG(cc & 0x8, F_AF); |
| 5913 | return (uint16_t) res; |
| 5914 | } |
| 5915 | /**************************************************************************** |
| 5916 | REMARKS: |
| 5917 | Implements the ADC instruction and side effects. |
| 5918 | ****************************************************************************/ |
| 5919 | static uint32_t |
| 5920 | adc_long(struct X86EMU *emu, uint32_t d, uint32_t s) |
| 5921 | { |
| 5922 | uint32_t lo; /* all operands in native machine order */ |
| 5923 | uint32_t hi; |
| 5924 | uint32_t res; |
| 5925 | uint32_t cc; |
| 5926 | |
| 5927 | if (ACCESS_FLAG(F_CF)) { |
| 5928 | lo = 1 + (d & 0xFFFF) + (s & 0xFFFF); |
| 5929 | res = 1 + d + s; |
| 5930 | } else { |
| 5931 | lo = (d & 0xFFFF) + (s & 0xFFFF); |
| 5932 | res = d + s; |
| 5933 | } |
| 5934 | hi = (lo >> 16) + (d >> 16) + (s >> 16); |
| 5935 | |
| 5936 | CONDITIONAL_SET_FLAG(hi & 0x10000, F_CF); |
| 5937 | CONDITIONAL_SET_FLAG((res & 0xffffffff) == 0, F_ZF); |
| 5938 | CONDITIONAL_SET_FLAG(res & 0x80000000, F_SF); |
| 5939 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 5940 | |
| 5941 | /* calculate the carry chain SEE NOTE AT TOP. */ |
| 5942 | cc = (s & d) | ((~res) & (s | d)); |
| 5943 | CONDITIONAL_SET_FLAG(XOR2(cc >> 30), F_OF); |
| 5944 | CONDITIONAL_SET_FLAG(cc & 0x8, F_AF); |
| 5945 | return res; |
| 5946 | } |
| 5947 | /**************************************************************************** |
| 5948 | REMARKS: |
| 5949 | Implements the ADD instruction and side effects. |
| 5950 | ****************************************************************************/ |
| 5951 | static uint8_t |
| 5952 | add_byte(struct X86EMU *emu, uint8_t d, uint8_t s) |
| 5953 | { |
| 5954 | uint32_t res; /* all operands in native machine order */ |
| 5955 | uint32_t cc; |
| 5956 | |
| 5957 | res = d + s; |
| 5958 | CONDITIONAL_SET_FLAG(res & 0x100, F_CF); |
| 5959 | CONDITIONAL_SET_FLAG((res & 0xff) == 0, F_ZF); |
| 5960 | CONDITIONAL_SET_FLAG(res & 0x80, F_SF); |
| 5961 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 5962 | |
| 5963 | /* calculate the carry chain SEE NOTE AT TOP. */ |
| 5964 | cc = (s & d) | ((~res) & (s | d)); |
| 5965 | CONDITIONAL_SET_FLAG(XOR2(cc >> 6), F_OF); |
| 5966 | CONDITIONAL_SET_FLAG(cc & 0x8, F_AF); |
| 5967 | return (uint8_t) res; |
| 5968 | } |
| 5969 | /**************************************************************************** |
| 5970 | REMARKS: |
| 5971 | Implements the ADD instruction and side effects. |
| 5972 | ****************************************************************************/ |
| 5973 | static uint16_t |
| 5974 | add_word(struct X86EMU *emu, uint16_t d, uint16_t s) |
| 5975 | { |
| 5976 | uint32_t res; /* all operands in native machine order */ |
| 5977 | uint32_t cc; |
| 5978 | |
| 5979 | res = d + s; |
| 5980 | CONDITIONAL_SET_FLAG(res & 0x10000, F_CF); |
| 5981 | CONDITIONAL_SET_FLAG((res & 0xffff) == 0, F_ZF); |
| 5982 | CONDITIONAL_SET_FLAG(res & 0x8000, F_SF); |
| 5983 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 5984 | |
| 5985 | /* calculate the carry chain SEE NOTE AT TOP. */ |
| 5986 | cc = (s & d) | ((~res) & (s | d)); |
| 5987 | CONDITIONAL_SET_FLAG(XOR2(cc >> 14), F_OF); |
| 5988 | CONDITIONAL_SET_FLAG(cc & 0x8, F_AF); |
| 5989 | return (uint16_t) res; |
| 5990 | } |
| 5991 | /**************************************************************************** |
| 5992 | REMARKS: |
| 5993 | Implements the ADD instruction and side effects. |
| 5994 | ****************************************************************************/ |
| 5995 | static uint32_t |
| 5996 | add_long(struct X86EMU *emu, uint32_t d, uint32_t s) |
| 5997 | { |
| 5998 | uint32_t lo; /* all operands in native machine order */ |
| 5999 | uint32_t hi; |
| 6000 | uint32_t res; |
| 6001 | uint32_t cc; |
| 6002 | |
| 6003 | lo = (d & 0xFFFF) + (s & 0xFFFF); |
| 6004 | res = d + s; |
| 6005 | hi = (lo >> 16) + (d >> 16) + (s >> 16); |
| 6006 | |
| 6007 | CONDITIONAL_SET_FLAG(hi & 0x10000, F_CF); |
| 6008 | CONDITIONAL_SET_FLAG((res & 0xffffffff) == 0, F_ZF); |
| 6009 | CONDITIONAL_SET_FLAG(res & 0x80000000, F_SF); |
| 6010 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 6011 | |
| 6012 | /* calculate the carry chain SEE NOTE AT TOP. */ |
| 6013 | cc = (s & d) | ((~res) & (s | d)); |
| 6014 | CONDITIONAL_SET_FLAG(XOR2(cc >> 30), F_OF); |
| 6015 | CONDITIONAL_SET_FLAG(cc & 0x8, F_AF); |
| 6016 | |
| 6017 | return res; |
| 6018 | } |
| 6019 | /**************************************************************************** |
| 6020 | REMARKS: |
| 6021 | Implements the AND instruction and side effects. |
| 6022 | ****************************************************************************/ |
| 6023 | static uint8_t |
| 6024 | and_byte(struct X86EMU *emu, uint8_t d, uint8_t s) |
| 6025 | { |
| 6026 | uint8_t res; /* all operands in native machine order */ |
| 6027 | |
| 6028 | res = d & s; |
| 6029 | |
| 6030 | /* set the flags */ |
| 6031 | CLEAR_FLAG(F_OF); |
| 6032 | CLEAR_FLAG(F_CF); |
| 6033 | CLEAR_FLAG(F_AF); |
| 6034 | CONDITIONAL_SET_FLAG(res & 0x80, F_SF); |
| 6035 | CONDITIONAL_SET_FLAG(res == 0, F_ZF); |
| 6036 | CONDITIONAL_SET_FLAG(PARITY(res), F_PF); |
| 6037 | return res; |
| 6038 | } |
| 6039 | /**************************************************************************** |
| 6040 | REMARKS: |
| 6041 | Implements the AND instruction and side effects. |
| 6042 | ****************************************************************************/ |
| 6043 | static uint16_t |
| 6044 | and_word(struct X86EMU *emu, uint16_t d, uint16_t s) |
| 6045 | { |
| 6046 | uint16_t res; /* all operands in native machine order */ |
| 6047 | |
| 6048 | res = d & s; |
| 6049 | |
| 6050 | /* set the flags */ |
| 6051 | CLEAR_FLAG(F_OF); |
| 6052 | CLEAR_FLAG(F_CF); |
| 6053 | CLEAR_FLAG(F_AF); |
| 6054 | CONDITIONAL_SET_FLAG(res & 0x8000, F_SF); |
| 6055 | CONDITIONAL_SET_FLAG(res == 0, F_ZF); |
| 6056 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 6057 | return res; |
| 6058 | } |
| 6059 | /**************************************************************************** |
| 6060 | REMARKS: |
| 6061 | Implements the AND instruction and side effects. |
| 6062 | ****************************************************************************/ |
| 6063 | static uint32_t |
| 6064 | and_long(struct X86EMU *emu, uint32_t d, uint32_t s) |
| 6065 | { |
| 6066 | uint32_t res; /* all operands in native machine order */ |
| 6067 | |
| 6068 | res = d & s; |
| 6069 | |
| 6070 | /* set the flags */ |
| 6071 | CLEAR_FLAG(F_OF); |
| 6072 | CLEAR_FLAG(F_CF); |
| 6073 | CLEAR_FLAG(F_AF); |
| 6074 | CONDITIONAL_SET_FLAG(res & 0x80000000, F_SF); |
| 6075 | CONDITIONAL_SET_FLAG(res == 0, F_ZF); |
| 6076 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 6077 | return res; |
| 6078 | } |
| 6079 | /**************************************************************************** |
| 6080 | REMARKS: |
| 6081 | Implements the CMP instruction and side effects. |
| 6082 | ****************************************************************************/ |
| 6083 | static uint8_t |
| 6084 | cmp_byte(struct X86EMU *emu, uint8_t d, uint8_t s) |
| 6085 | { |
| 6086 | uint32_t res; /* all operands in native machine order */ |
| 6087 | uint32_t bc; |
| 6088 | |
| 6089 | res = d - s; |
| 6090 | CLEAR_FLAG(F_CF); |
| 6091 | CONDITIONAL_SET_FLAG(res & 0x80, F_SF); |
| 6092 | CONDITIONAL_SET_FLAG((res & 0xff) == 0, F_ZF); |
| 6093 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 6094 | |
| 6095 | /* calculate the borrow chain. See note at top */ |
| 6096 | bc = (res & (~d | s)) | (~d & s); |
| 6097 | CONDITIONAL_SET_FLAG(bc & 0x80, F_CF); |
| 6098 | CONDITIONAL_SET_FLAG(XOR2(bc >> 6), F_OF); |
| 6099 | CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); |
| 6100 | return d; |
| 6101 | } |
| 6102 | |
| 6103 | static void |
| 6104 | cmp_byte_no_return(struct X86EMU *emu, uint8_t d, uint8_t s) |
| 6105 | { |
| 6106 | cmp_byte(emu, d, s); |
| 6107 | } |
| 6108 | /**************************************************************************** |
| 6109 | REMARKS: |
| 6110 | Implements the CMP instruction and side effects. |
| 6111 | ****************************************************************************/ |
| 6112 | static uint16_t |
| 6113 | cmp_word(struct X86EMU *emu, uint16_t d, uint16_t s) |
| 6114 | { |
| 6115 | uint32_t res; /* all operands in native machine order */ |
| 6116 | uint32_t bc; |
| 6117 | |
| 6118 | res = d - s; |
| 6119 | CONDITIONAL_SET_FLAG(res & 0x8000, F_SF); |
| 6120 | CONDITIONAL_SET_FLAG((res & 0xffff) == 0, F_ZF); |
| 6121 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 6122 | |
| 6123 | /* calculate the borrow chain. See note at top */ |
| 6124 | bc = (res & (~d | s)) | (~d & s); |
| 6125 | CONDITIONAL_SET_FLAG(bc & 0x8000, F_CF); |
| 6126 | CONDITIONAL_SET_FLAG(XOR2(bc >> 14), F_OF); |
| 6127 | CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); |
| 6128 | return d; |
| 6129 | } |
| 6130 | |
| 6131 | static void |
| 6132 | cmp_word_no_return(struct X86EMU *emu, uint16_t d, uint16_t s) |
| 6133 | { |
| 6134 | cmp_word(emu, d, s); |
| 6135 | } |
| 6136 | /**************************************************************************** |
| 6137 | REMARKS: |
| 6138 | Implements the CMP instruction and side effects. |
| 6139 | ****************************************************************************/ |
| 6140 | static uint32_t |
| 6141 | cmp_long(struct X86EMU *emu, uint32_t d, uint32_t s) |
| 6142 | { |
| 6143 | uint32_t res; /* all operands in native machine order */ |
| 6144 | uint32_t bc; |
| 6145 | |
| 6146 | res = d - s; |
| 6147 | CONDITIONAL_SET_FLAG(res & 0x80000000, F_SF); |
| 6148 | CONDITIONAL_SET_FLAG((res & 0xffffffff) == 0, F_ZF); |
| 6149 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 6150 | |
| 6151 | /* calculate the borrow chain. See note at top */ |
| 6152 | bc = (res & (~d | s)) | (~d & s); |
| 6153 | CONDITIONAL_SET_FLAG(bc & 0x80000000, F_CF); |
| 6154 | CONDITIONAL_SET_FLAG(XOR2(bc >> 30), F_OF); |
| 6155 | CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); |
| 6156 | return d; |
| 6157 | } |
| 6158 | |
| 6159 | static void |
| 6160 | cmp_long_no_return(struct X86EMU *emu, uint32_t d, uint32_t s) |
| 6161 | { |
| 6162 | cmp_long(emu, d, s); |
| 6163 | } |
| 6164 | /**************************************************************************** |
| 6165 | REMARKS: |
| 6166 | Implements the DAA instruction and side effects. |
| 6167 | ****************************************************************************/ |
| 6168 | static uint8_t |
| 6169 | daa_byte(struct X86EMU *emu, uint8_t d) |
| 6170 | { |
| 6171 | uint32_t res = d; |
| 6172 | if ((d & 0xf) > 9 || ACCESS_FLAG(F_AF)) { |
| 6173 | res += 6; |
| 6174 | SET_FLAG(F_AF); |
| 6175 | } |
| 6176 | if (res > 0x9F || ACCESS_FLAG(F_CF)) { |
| 6177 | res += 0x60; |
| 6178 | SET_FLAG(F_CF); |
| 6179 | } |
| 6180 | CONDITIONAL_SET_FLAG(res & 0x80, F_SF); |
| 6181 | CONDITIONAL_SET_FLAG((res & 0xFF) == 0, F_ZF); |
| 6182 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 6183 | return (uint8_t) res; |
| 6184 | } |
| 6185 | /**************************************************************************** |
| 6186 | REMARKS: |
| 6187 | Implements the DAS instruction and side effects. |
| 6188 | ****************************************************************************/ |
| 6189 | static uint8_t |
| 6190 | das_byte(struct X86EMU *emu, uint8_t d) |
| 6191 | { |
| 6192 | if ((d & 0xf) > 9 || ACCESS_FLAG(F_AF)) { |
| 6193 | d -= 6; |
| 6194 | SET_FLAG(F_AF); |
| 6195 | } |
| 6196 | if (d > 0x9F || ACCESS_FLAG(F_CF)) { |
| 6197 | d -= 0x60; |
| 6198 | SET_FLAG(F_CF); |
| 6199 | } |
| 6200 | CONDITIONAL_SET_FLAG(d & 0x80, F_SF); |
| 6201 | CONDITIONAL_SET_FLAG(d == 0, F_ZF); |
| 6202 | CONDITIONAL_SET_FLAG(PARITY(d & 0xff), F_PF); |
| 6203 | return d; |
| 6204 | } |
| 6205 | /**************************************************************************** |
| 6206 | REMARKS: |
| 6207 | Implements the DEC instruction and side effects. |
| 6208 | ****************************************************************************/ |
| 6209 | static uint8_t |
| 6210 | dec_byte(struct X86EMU *emu, uint8_t d) |
| 6211 | { |
| 6212 | uint32_t res; /* all operands in native machine order */ |
| 6213 | uint32_t bc; |
| 6214 | |
| 6215 | res = d - 1; |
| 6216 | CONDITIONAL_SET_FLAG(res & 0x80, F_SF); |
| 6217 | CONDITIONAL_SET_FLAG((res & 0xff) == 0, F_ZF); |
| 6218 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 6219 | |
| 6220 | /* calculate the borrow chain. See note at top */ |
| 6221 | /* based on sub_byte, uses s==1. */ |
| 6222 | bc = (res & (~d | 1)) | (~d & 1); |
| 6223 | /* carry flag unchanged */ |
| 6224 | CONDITIONAL_SET_FLAG(XOR2(bc >> 6), F_OF); |
| 6225 | CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); |
| 6226 | return (uint8_t) res; |
| 6227 | } |
| 6228 | /**************************************************************************** |
| 6229 | REMARKS: |
| 6230 | Implements the DEC instruction and side effects. |
| 6231 | ****************************************************************************/ |
| 6232 | static uint16_t |
| 6233 | dec_word(struct X86EMU *emu, uint16_t d) |
| 6234 | { |
| 6235 | uint32_t res; /* all operands in native machine order */ |
| 6236 | uint32_t bc; |
| 6237 | |
| 6238 | res = d - 1; |
| 6239 | CONDITIONAL_SET_FLAG(res & 0x8000, F_SF); |
| 6240 | CONDITIONAL_SET_FLAG((res & 0xffff) == 0, F_ZF); |
| 6241 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 6242 | |
| 6243 | /* calculate the borrow chain. See note at top */ |
| 6244 | /* based on the sub_byte routine, with s==1 */ |
| 6245 | bc = (res & (~d | 1)) | (~d & 1); |
| 6246 | /* carry flag unchanged */ |
| 6247 | CONDITIONAL_SET_FLAG(XOR2(bc >> 14), F_OF); |
| 6248 | CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); |
| 6249 | return (uint16_t) res; |
| 6250 | } |
| 6251 | /**************************************************************************** |
| 6252 | REMARKS: |
| 6253 | Implements the DEC instruction and side effects. |
| 6254 | ****************************************************************************/ |
| 6255 | static uint32_t |
| 6256 | dec_long(struct X86EMU *emu, uint32_t d) |
| 6257 | { |
| 6258 | uint32_t res; /* all operands in native machine order */ |
| 6259 | uint32_t bc; |
| 6260 | |
| 6261 | res = d - 1; |
| 6262 | |
| 6263 | CONDITIONAL_SET_FLAG(res & 0x80000000, F_SF); |
| 6264 | CONDITIONAL_SET_FLAG((res & 0xffffffff) == 0, F_ZF); |
| 6265 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 6266 | |
| 6267 | /* calculate the borrow chain. See note at top */ |
| 6268 | bc = (res & (~d | 1)) | (~d & 1); |
| 6269 | /* carry flag unchanged */ |
| 6270 | CONDITIONAL_SET_FLAG(XOR2(bc >> 30), F_OF); |
| 6271 | CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); |
| 6272 | return res; |
| 6273 | } |
| 6274 | /**************************************************************************** |
| 6275 | REMARKS: |
| 6276 | Implements the INC instruction and side effects. |
| 6277 | ****************************************************************************/ |
| 6278 | static uint8_t |
| 6279 | inc_byte(struct X86EMU *emu, uint8_t d) |
| 6280 | { |
| 6281 | uint32_t res; /* all operands in native machine order */ |
| 6282 | uint32_t cc; |
| 6283 | |
| 6284 | res = d + 1; |
| 6285 | CONDITIONAL_SET_FLAG((res & 0xff) == 0, F_ZF); |
| 6286 | CONDITIONAL_SET_FLAG(res & 0x80, F_SF); |
| 6287 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 6288 | |
| 6289 | /* calculate the carry chain SEE NOTE AT TOP. */ |
| 6290 | cc = ((1 & d) | (~res)) & (1 | d); |
| 6291 | CONDITIONAL_SET_FLAG(XOR2(cc >> 6), F_OF); |
| 6292 | CONDITIONAL_SET_FLAG(cc & 0x8, F_AF); |
| 6293 | return (uint8_t) res; |
| 6294 | } |
| 6295 | /**************************************************************************** |
| 6296 | REMARKS: |
| 6297 | Implements the INC instruction and side effects. |
| 6298 | ****************************************************************************/ |
| 6299 | static uint16_t |
| 6300 | inc_word(struct X86EMU *emu, uint16_t d) |
| 6301 | { |
| 6302 | uint32_t res; /* all operands in native machine order */ |
| 6303 | uint32_t cc; |
| 6304 | |
| 6305 | res = d + 1; |
| 6306 | CONDITIONAL_SET_FLAG((res & 0xffff) == 0, F_ZF); |
| 6307 | CONDITIONAL_SET_FLAG(res & 0x8000, F_SF); |
| 6308 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 6309 | |
| 6310 | /* calculate the carry chain SEE NOTE AT TOP. */ |
| 6311 | cc = (1 & d) | ((~res) & (1 | d)); |
| 6312 | CONDITIONAL_SET_FLAG(XOR2(cc >> 14), F_OF); |
| 6313 | CONDITIONAL_SET_FLAG(cc & 0x8, F_AF); |
| 6314 | return (uint16_t) res; |
| 6315 | } |
| 6316 | /**************************************************************************** |
| 6317 | REMARKS: |
| 6318 | Implements the INC instruction and side effects. |
| 6319 | ****************************************************************************/ |
| 6320 | static uint32_t |
| 6321 | inc_long(struct X86EMU *emu, uint32_t d) |
| 6322 | { |
| 6323 | uint32_t res; /* all operands in native machine order */ |
| 6324 | uint32_t cc; |
| 6325 | |
| 6326 | res = d + 1; |
| 6327 | CONDITIONAL_SET_FLAG((res & 0xffffffff) == 0, F_ZF); |
| 6328 | CONDITIONAL_SET_FLAG(res & 0x80000000, F_SF); |
| 6329 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 6330 | |
| 6331 | /* calculate the carry chain SEE NOTE AT TOP. */ |
| 6332 | cc = (1 & d) | ((~res) & (1 | d)); |
| 6333 | CONDITIONAL_SET_FLAG(XOR2(cc >> 30), F_OF); |
| 6334 | CONDITIONAL_SET_FLAG(cc & 0x8, F_AF); |
| 6335 | return res; |
| 6336 | } |
| 6337 | /**************************************************************************** |
| 6338 | REMARKS: |
| 6339 | Implements the OR instruction and side effects. |
| 6340 | ****************************************************************************/ |
| 6341 | static uint8_t |
| 6342 | or_byte(struct X86EMU *emu, uint8_t d, uint8_t s) |
| 6343 | { |
| 6344 | uint8_t res; /* all operands in native machine order */ |
| 6345 | |
| 6346 | res = d | s; |
| 6347 | CLEAR_FLAG(F_OF); |
| 6348 | CLEAR_FLAG(F_CF); |
| 6349 | CLEAR_FLAG(F_AF); |
| 6350 | CONDITIONAL_SET_FLAG(res & 0x80, F_SF); |
| 6351 | CONDITIONAL_SET_FLAG(res == 0, F_ZF); |
| 6352 | CONDITIONAL_SET_FLAG(PARITY(res), F_PF); |
| 6353 | return res; |
| 6354 | } |
| 6355 | /**************************************************************************** |
| 6356 | REMARKS: |
| 6357 | Implements the OR instruction and side effects. |
| 6358 | ****************************************************************************/ |
| 6359 | static uint16_t |
| 6360 | or_word(struct X86EMU *emu, uint16_t d, uint16_t s) |
| 6361 | { |
| 6362 | uint16_t res; /* all operands in native machine order */ |
| 6363 | |
| 6364 | res = d | s; |
| 6365 | /* set the carry flag to be bit 8 */ |
| 6366 | CLEAR_FLAG(F_OF); |
| 6367 | CLEAR_FLAG(F_CF); |
| 6368 | CLEAR_FLAG(F_AF); |
| 6369 | CONDITIONAL_SET_FLAG(res & 0x8000, F_SF); |
| 6370 | CONDITIONAL_SET_FLAG(res == 0, F_ZF); |
| 6371 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 6372 | return res; |
| 6373 | } |
| 6374 | /**************************************************************************** |
| 6375 | REMARKS: |
| 6376 | Implements the OR instruction and side effects. |
| 6377 | ****************************************************************************/ |
| 6378 | static uint32_t |
| 6379 | or_long(struct X86EMU *emu, uint32_t d, uint32_t s) |
| 6380 | { |
| 6381 | uint32_t res; /* all operands in native machine order */ |
| 6382 | |
| 6383 | res = d | s; |
| 6384 | |
| 6385 | /* set the carry flag to be bit 8 */ |
| 6386 | CLEAR_FLAG(F_OF); |
| 6387 | CLEAR_FLAG(F_CF); |
| 6388 | CLEAR_FLAG(F_AF); |
| 6389 | CONDITIONAL_SET_FLAG(res & 0x80000000, F_SF); |
| 6390 | CONDITIONAL_SET_FLAG(res == 0, F_ZF); |
| 6391 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 6392 | return res; |
| 6393 | } |
| 6394 | /**************************************************************************** |
| 6395 | REMARKS: |
| 6396 | Implements the OR instruction and side effects. |
| 6397 | ****************************************************************************/ |
| 6398 | static uint8_t |
| 6399 | neg_byte(struct X86EMU *emu, uint8_t s) |
| 6400 | { |
| 6401 | uint8_t res; |
| 6402 | uint8_t bc; |
| 6403 | |
| 6404 | CONDITIONAL_SET_FLAG(s != 0, F_CF); |
| 6405 | res = (uint8_t) - s; |
| 6406 | CONDITIONAL_SET_FLAG((res & 0xff) == 0, F_ZF); |
| 6407 | CONDITIONAL_SET_FLAG(res & 0x80, F_SF); |
| 6408 | CONDITIONAL_SET_FLAG(PARITY(res), F_PF); |
| 6409 | /* calculate the borrow chain --- modified such that d=0. |
| 6410 | * substitutiing d=0 into bc= res&(~d|s)|(~d&s); (the one used for |
| 6411 | * sub) and simplifying, since ~d=0xff..., ~d|s == 0xffff..., and |
| 6412 | * res&0xfff... == res. Similarly ~d&s == s. So the simplified |
| 6413 | * result is: */ |
| 6414 | bc = res | s; |
| 6415 | CONDITIONAL_SET_FLAG(XOR2(bc >> 6), F_OF); |
| 6416 | CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); |
| 6417 | return res; |
| 6418 | } |
| 6419 | /**************************************************************************** |
| 6420 | REMARKS: |
| 6421 | Implements the OR instruction and side effects. |
| 6422 | ****************************************************************************/ |
| 6423 | static uint16_t |
| 6424 | neg_word(struct X86EMU *emu, uint16_t s) |
| 6425 | { |
| 6426 | uint16_t res; |
| 6427 | uint16_t bc; |
| 6428 | |
| 6429 | CONDITIONAL_SET_FLAG(s != 0, F_CF); |
| 6430 | res = (uint16_t) - s; |
| 6431 | CONDITIONAL_SET_FLAG((res & 0xffff) == 0, F_ZF); |
| 6432 | CONDITIONAL_SET_FLAG(res & 0x8000, F_SF); |
| 6433 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 6434 | |
| 6435 | /* calculate the borrow chain --- modified such that d=0. |
| 6436 | * substitutiing d=0 into bc= res&(~d|s)|(~d&s); (the one used for |
| 6437 | * sub) and simplifying, since ~d=0xff..., ~d|s == 0xffff..., and |
| 6438 | * res&0xfff... == res. Similarly ~d&s == s. So the simplified |
| 6439 | * result is: */ |
| 6440 | bc = res | s; |
| 6441 | CONDITIONAL_SET_FLAG(XOR2(bc >> 14), F_OF); |
| 6442 | CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); |
| 6443 | return res; |
| 6444 | } |
| 6445 | /**************************************************************************** |
| 6446 | REMARKS: |
| 6447 | Implements the OR instruction and side effects. |
| 6448 | ****************************************************************************/ |
| 6449 | static uint32_t |
| 6450 | neg_long(struct X86EMU *emu, uint32_t s) |
| 6451 | { |
| 6452 | uint32_t res; |
| 6453 | uint32_t bc; |
| 6454 | |
| 6455 | CONDITIONAL_SET_FLAG(s != 0, F_CF); |
| 6456 | res = (uint32_t) - s; |
| 6457 | CONDITIONAL_SET_FLAG((res & 0xffffffff) == 0, F_ZF); |
| 6458 | CONDITIONAL_SET_FLAG(res & 0x80000000, F_SF); |
| 6459 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 6460 | |
| 6461 | /* calculate the borrow chain --- modified such that d=0. |
| 6462 | * substitutiing d=0 into bc= res&(~d|s)|(~d&s); (the one used for |
| 6463 | * sub) and simplifying, since ~d=0xff..., ~d|s == 0xffff..., and |
| 6464 | * res&0xfff... == res. Similarly ~d&s == s. So the simplified |
| 6465 | * result is: */ |
| 6466 | bc = res | s; |
| 6467 | CONDITIONAL_SET_FLAG(XOR2(bc >> 30), F_OF); |
| 6468 | CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); |
| 6469 | return res; |
| 6470 | } |
| 6471 | /**************************************************************************** |
| 6472 | REMARKS: |
| 6473 | Implements the RCL instruction and side effects. |
| 6474 | ****************************************************************************/ |
| 6475 | static uint8_t |
| 6476 | rcl_byte(struct X86EMU *emu, uint8_t d, uint8_t s) |
| 6477 | { |
| 6478 | unsigned int res, cnt, mask, cf; |
| 6479 | |
| 6480 | /* s is the rotate distance. It varies from 0 - 8. */ |
| 6481 | /* have |
| 6482 | * |
| 6483 | * CF B_7 B_6 B_5 B_4 B_3 B_2 B_1 B_0 |
| 6484 | * |
| 6485 | * want to rotate through the carry by "s" bits. We could loop, but |
| 6486 | * that's inefficient. So the width is 9, and we split into three |
| 6487 | * parts: |
| 6488 | * |
| 6489 | * The new carry flag (was B_n) the stuff in B_n-1 .. B_0 the stuff in |
| 6490 | * B_7 .. B_n+1 |
| 6491 | * |
| 6492 | * The new rotate is done mod 9, and given this, for a rotation of n bits |
| 6493 | * (mod 9) the new carry flag is then located n bits from the MSB. |
| 6494 | * The low part is then shifted up cnt bits, and the high part is or'd |
| 6495 | * in. Using CAPS for new values, and lowercase for the original |
| 6496 | * values, this can be expressed as: |
| 6497 | * |
| 6498 | * IF n > 0 1) CF <- b_(8-n) 2) B_(7) .. B_(n) <- b_(8-(n+1)) .. b_0 |
| 6499 | * 3) B_(n-1) <- cf 4) B_(n-2) .. B_0 <- b_7 .. b_(8-(n-1)) */ |
| 6500 | res = d; |
| 6501 | if ((cnt = s % 9) != 0) { |
| 6502 | /* extract the new CARRY FLAG. */ |
| 6503 | /* CF <- b_(8-n) */ |
| 6504 | cf = (d >> (8 - cnt)) & 0x1; |
| 6505 | |
| 6506 | /* get the low stuff which rotated into the range B_7 .. B_cnt */ |
| 6507 | /* B_(7) .. B_(n) <- b_(8-(n+1)) .. b_0 */ |
| 6508 | /* note that the right hand side done by the mask */ |
| 6509 | res = (d << cnt) & 0xff; |
| 6510 | |
| 6511 | /* now the high stuff which rotated around into the positions |
| 6512 | * B_cnt-2 .. B_0 */ |
| 6513 | /* B_(n-2) .. B_0 <- b_7 .. b_(8-(n-1)) */ |
| 6514 | /* shift it downward, 7-(n-2) = 9-n positions. and mask off |
| 6515 | * the result before or'ing in. */ |
| 6516 | mask = (1 << (cnt - 1)) - 1; |
| 6517 | res |= (d >> (9 - cnt)) & mask; |
| 6518 | |
| 6519 | /* if the carry flag was set, or it in. */ |
| 6520 | if (ACCESS_FLAG(F_CF)) { /* carry flag is set */ |
| 6521 | /* B_(n-1) <- cf */ |
| 6522 | res |= 1 << (cnt - 1); |
| 6523 | } |
| 6524 | /* set the new carry flag, based on the variable "cf" */ |
| 6525 | CONDITIONAL_SET_FLAG(cf, F_CF); |
| 6526 | /* OVERFLOW is set *IFF* cnt==1, then it is the xor of CF and |
| 6527 | * the most significant bit. Blecck. */ |
| 6528 | /* parenthesized this expression since it appears to be |
| 6529 | * causing OF to be misset */ |
| 6530 | CONDITIONAL_SET_FLAG(cnt == 1 && XOR2(cf + ((res >> 6) & 0x2)), |
| 6531 | F_OF); |
| 6532 | |
| 6533 | } |
| 6534 | return (uint8_t) res; |
| 6535 | } |
| 6536 | /**************************************************************************** |
| 6537 | REMARKS: |
| 6538 | Implements the RCL instruction and side effects. |
| 6539 | ****************************************************************************/ |
| 6540 | static uint16_t |
| 6541 | rcl_word(struct X86EMU *emu, uint16_t d, uint8_t s) |
| 6542 | { |
| 6543 | unsigned int res, cnt, mask, cf; |
| 6544 | |
| 6545 | res = d; |
| 6546 | if ((cnt = s % 17) != 0) { |
| 6547 | cf = (d >> (16 - cnt)) & 0x1; |
| 6548 | res = (d << cnt) & 0xffff; |
| 6549 | mask = (1 << (cnt - 1)) - 1; |
| 6550 | res |= (d >> (17 - cnt)) & mask; |
| 6551 | if (ACCESS_FLAG(F_CF)) { |
| 6552 | res |= 1 << (cnt - 1); |
| 6553 | } |
| 6554 | CONDITIONAL_SET_FLAG(cf, F_CF); |
| 6555 | CONDITIONAL_SET_FLAG(cnt == 1 && XOR2(cf + ((res >> 14) & 0x2)), |
| 6556 | F_OF); |
| 6557 | } |
| 6558 | return (uint16_t) res; |
| 6559 | } |
| 6560 | /**************************************************************************** |
| 6561 | REMARKS: |
| 6562 | Implements the RCL instruction and side effects. |
| 6563 | ****************************************************************************/ |
| 6564 | static uint32_t |
| 6565 | rcl_long(struct X86EMU *emu, uint32_t d, uint8_t s) |
| 6566 | { |
| 6567 | uint32_t res, cnt, mask, cf; |
| 6568 | |
| 6569 | res = d; |
| 6570 | if ((cnt = s % 33) != 0) { |
| 6571 | cf = (d >> (32 - cnt)) & 0x1; |
| 6572 | res = (d << cnt) & 0xffffffff; |
| 6573 | mask = (1 << (cnt - 1)) - 1; |
| 6574 | res |= (d >> (33 - cnt)) & mask; |
| 6575 | if (ACCESS_FLAG(F_CF)) { /* carry flag is set */ |
| 6576 | res |= 1 << (cnt - 1); |
| 6577 | } |
| 6578 | CONDITIONAL_SET_FLAG(cf, F_CF); |
| 6579 | CONDITIONAL_SET_FLAG(cnt == 1 && XOR2(cf + ((res >> 30) & 0x2)), |
| 6580 | F_OF); |
| 6581 | } |
| 6582 | return res; |
| 6583 | } |
| 6584 | /**************************************************************************** |
| 6585 | REMARKS: |
| 6586 | Implements the RCR instruction and side effects. |
| 6587 | ****************************************************************************/ |
| 6588 | static uint8_t |
| 6589 | rcr_byte(struct X86EMU *emu, uint8_t d, uint8_t s) |
| 6590 | { |
| 6591 | uint32_t res, cnt; |
| 6592 | uint32_t mask, cf, ocf = 0; |
| 6593 | |
| 6594 | /* rotate right through carry */ |
| 6595 | /* s is the rotate distance. It varies from 0 - 8. d is the byte |
| 6596 | * object rotated. |
| 6597 | * |
| 6598 | * have |
| 6599 | * |
| 6600 | * CF B_7 B_6 B_5 B_4 B_3 B_2 B_1 B_0 |
| 6601 | * |
| 6602 | * The new rotate is done mod 9, and given this, for a rotation of n bits |
| 6603 | * (mod 9) the new carry flag is then located n bits from the LSB. |
| 6604 | * The low part is then shifted up cnt bits, and the high part is or'd |
| 6605 | * in. Using CAPS for new values, and lowercase for the original |
| 6606 | * values, this can be expressed as: |
| 6607 | * |
| 6608 | * IF n > 0 1) CF <- b_(n-1) 2) B_(8-(n+1)) .. B_(0) <- b_(7) .. b_(n) |
| 6609 | * 3) B_(8-n) <- cf 4) B_(7) .. B_(8-(n-1)) <- b_(n-2) .. b_(0) */ |
| 6610 | res = d; |
| 6611 | if ((cnt = s % 9) != 0) { |
| 6612 | /* extract the new CARRY FLAG. */ |
| 6613 | /* CF <- b_(n-1) */ |
| 6614 | if (cnt == 1) { |
| 6615 | cf = d & 0x1; |
| 6616 | /* note hackery here. Access_flag(..) evaluates to |
| 6617 | * either 0 if flag not set non-zero if flag is set. |
| 6618 | * doing access_flag(..) != 0 casts that into either |
| 6619 | * 0..1 in any representation of the flags register |
| 6620 | * (i.e. packed bit array or unpacked.) */ |
| 6621 | ocf = ACCESS_FLAG(F_CF) != 0; |
| 6622 | } else |
| 6623 | cf = (d >> (cnt - 1)) & 0x1; |
| 6624 | |
| 6625 | /* B_(8-(n+1)) .. B_(0) <- b_(7) .. b_n */ |
| 6626 | /* note that the right hand side done by the mask This is |
| 6627 | * effectively done by shifting the object to the right. The |
| 6628 | * result must be masked, in case the object came in and was |
| 6629 | * treated as a negative number. Needed??? */ |
| 6630 | |
| 6631 | mask = (1 << (8 - cnt)) - 1; |
| 6632 | res = (d >> cnt) & mask; |
| 6633 | |
| 6634 | /* now the high stuff which rotated around into the positions |
| 6635 | * B_cnt-2 .. B_0 */ |
| 6636 | /* B_(7) .. B_(8-(n-1)) <- b_(n-2) .. b_(0) */ |
| 6637 | /* shift it downward, 7-(n-2) = 9-n positions. and mask off |
| 6638 | * the result before or'ing in. */ |
| 6639 | res |= (d << (9 - cnt)); |
| 6640 | |
| 6641 | /* if the carry flag was set, or it in. */ |
| 6642 | if (ACCESS_FLAG(F_CF)) { /* carry flag is set */ |
| 6643 | /* B_(8-n) <- cf */ |
| 6644 | res |= 1 << (8 - cnt); |
| 6645 | } |
| 6646 | /* set the new carry flag, based on the variable "cf" */ |
| 6647 | CONDITIONAL_SET_FLAG(cf, F_CF); |
| 6648 | /* OVERFLOW is set *IFF* cnt==1, then it is the xor of CF and |
| 6649 | * the most significant bit. Blecck. */ |
| 6650 | /* parenthesized... */ |
| 6651 | if (cnt == 1) { |
| 6652 | CONDITIONAL_SET_FLAG(XOR2(ocf + ((d >> 6) & 0x2)), |
| 6653 | F_OF); |
| 6654 | } |
| 6655 | } |
| 6656 | return (uint8_t) res; |
| 6657 | } |
| 6658 | /**************************************************************************** |
| 6659 | REMARKS: |
| 6660 | Implements the RCR instruction and side effects. |
| 6661 | ****************************************************************************/ |
| 6662 | static uint16_t |
| 6663 | rcr_word(struct X86EMU *emu, uint16_t d, uint8_t s) |
| 6664 | { |
| 6665 | uint32_t res, cnt; |
| 6666 | uint32_t mask, cf, ocf = 0; |
| 6667 | |
| 6668 | /* rotate right through carry */ |
| 6669 | res = d; |
| 6670 | if ((cnt = s % 17) != 0) { |
| 6671 | if (cnt == 1) { |
| 6672 | cf = d & 0x1; |
| 6673 | ocf = ACCESS_FLAG(F_CF) != 0; |
| 6674 | } else |
| 6675 | cf = (d >> (cnt - 1)) & 0x1; |
| 6676 | mask = (1 << (16 - cnt)) - 1; |
| 6677 | res = (d >> cnt) & mask; |
| 6678 | res |= (d << (17 - cnt)); |
| 6679 | if (ACCESS_FLAG(F_CF)) { |
| 6680 | res |= 1 << (16 - cnt); |
| 6681 | } |
| 6682 | CONDITIONAL_SET_FLAG(cf, F_CF); |
| 6683 | if (cnt == 1) { |
| 6684 | CONDITIONAL_SET_FLAG(XOR2(ocf + ((d >> 14) & 0x2)), |
| 6685 | F_OF); |
| 6686 | } |
| 6687 | } |
| 6688 | return (uint16_t) res; |
| 6689 | } |
| 6690 | /**************************************************************************** |
| 6691 | REMARKS: |
| 6692 | Implements the RCR instruction and side effects. |
| 6693 | ****************************************************************************/ |
| 6694 | static uint32_t |
| 6695 | rcr_long(struct X86EMU *emu, uint32_t d, uint8_t s) |
| 6696 | { |
| 6697 | uint32_t res, cnt; |
| 6698 | uint32_t mask, cf, ocf = 0; |
| 6699 | |
| 6700 | /* rotate right through carry */ |
| 6701 | res = d; |
| 6702 | if ((cnt = s % 33) != 0) { |
| 6703 | if (cnt == 1) { |
| 6704 | cf = d & 0x1; |
| 6705 | ocf = ACCESS_FLAG(F_CF) != 0; |
| 6706 | } else |
| 6707 | cf = (d >> (cnt - 1)) & 0x1; |
| 6708 | mask = (1 << (32 - cnt)) - 1; |
| 6709 | res = (d >> cnt) & mask; |
| 6710 | if (cnt != 1) |
| 6711 | res |= (d << (33 - cnt)); |
| 6712 | if (ACCESS_FLAG(F_CF)) { /* carry flag is set */ |
| 6713 | res |= 1 << (32 - cnt); |
| 6714 | } |
| 6715 | CONDITIONAL_SET_FLAG(cf, F_CF); |
| 6716 | if (cnt == 1) { |
| 6717 | CONDITIONAL_SET_FLAG(XOR2(ocf + ((d >> 30) & 0x2)), |
| 6718 | F_OF); |
| 6719 | } |
| 6720 | } |
| 6721 | return res; |
| 6722 | } |
| 6723 | /**************************************************************************** |
| 6724 | REMARKS: |
| 6725 | Implements the ROL instruction and side effects. |
| 6726 | ****************************************************************************/ |
| 6727 | static uint8_t |
| 6728 | rol_byte(struct X86EMU *emu, uint8_t d, uint8_t s) |
| 6729 | { |
| 6730 | unsigned int res, cnt, mask; |
| 6731 | |
| 6732 | /* rotate left */ |
| 6733 | /* s is the rotate distance. It varies from 0 - 8. d is the byte |
| 6734 | * object rotated. |
| 6735 | * |
| 6736 | * have |
| 6737 | * |
| 6738 | * CF B_7 ... B_0 |
| 6739 | * |
| 6740 | * The new rotate is done mod 8. Much simpler than the "rcl" or "rcr" |
| 6741 | * operations. |
| 6742 | * |
| 6743 | * IF n > 0 1) B_(7) .. B_(n) <- b_(8-(n+1)) .. b_(0) 2) B_(n-1) .. |
| 6744 | * B_(0) <- b_(7) .. b_(8-n) */ |
| 6745 | res = d; |
| 6746 | if ((cnt = s % 8) != 0) { |
| 6747 | /* B_(7) .. B_(n) <- b_(8-(n+1)) .. b_(0) */ |
| 6748 | res = (d << cnt); |
| 6749 | |
| 6750 | /* B_(n-1) .. B_(0) <- b_(7) .. b_(8-n) */ |
| 6751 | mask = (1 << cnt) - 1; |
| 6752 | res |= (d >> (8 - cnt)) & mask; |
| 6753 | |
| 6754 | /* set the new carry flag, Note that it is the low order bit |
| 6755 | * of the result!!! */ |
| 6756 | CONDITIONAL_SET_FLAG(res & 0x1, F_CF); |
| 6757 | /* OVERFLOW is set *IFF* s==1, then it is the xor of CF and |
| 6758 | * the most significant bit. Blecck. */ |
| 6759 | CONDITIONAL_SET_FLAG(s == 1 && |
| 6760 | XOR2((res & 0x1) + ((res >> 6) & 0x2)), |
| 6761 | F_OF); |
| 6762 | } if (s != 0) { |
| 6763 | /* set the new carry flag, Note that it is the low order bit |
| 6764 | * of the result!!! */ |
| 6765 | CONDITIONAL_SET_FLAG(res & 0x1, F_CF); |
| 6766 | } |
| 6767 | return (uint8_t) res; |
| 6768 | } |
| 6769 | /**************************************************************************** |
| 6770 | REMARKS: |
| 6771 | Implements the ROL instruction and side effects. |
| 6772 | ****************************************************************************/ |
| 6773 | static uint16_t |
| 6774 | rol_word(struct X86EMU *emu, uint16_t d, uint8_t s) |
| 6775 | { |
| 6776 | unsigned int res, cnt, mask; |
| 6777 | |
| 6778 | res = d; |
| 6779 | if ((cnt = s % 16) != 0) { |
| 6780 | res = (d << cnt); |
| 6781 | mask = (1 << cnt) - 1; |
| 6782 | res |= (d >> (16 - cnt)) & mask; |
| 6783 | CONDITIONAL_SET_FLAG(res & 0x1, F_CF); |
| 6784 | CONDITIONAL_SET_FLAG(s == 1 && |
| 6785 | XOR2((res & 0x1) + ((res >> 14) & 0x2)), |
| 6786 | F_OF); |
| 6787 | } if (s != 0) { |
| 6788 | /* set the new carry flag, Note that it is the low order bit |
| 6789 | * of the result!!! */ |
| 6790 | CONDITIONAL_SET_FLAG(res & 0x1, F_CF); |
| 6791 | } |
| 6792 | return (uint16_t) res; |
| 6793 | } |
| 6794 | /**************************************************************************** |
| 6795 | REMARKS: |
| 6796 | Implements the ROL instruction and side effects. |
| 6797 | ****************************************************************************/ |
| 6798 | static uint32_t |
| 6799 | rol_long(struct X86EMU *emu, uint32_t d, uint8_t s) |
| 6800 | { |
| 6801 | uint32_t res, cnt, mask; |
| 6802 | |
| 6803 | res = d; |
| 6804 | if ((cnt = s % 32) != 0) { |
| 6805 | res = (d << cnt); |
| 6806 | mask = (1 << cnt) - 1; |
| 6807 | res |= (d >> (32 - cnt)) & mask; |
| 6808 | CONDITIONAL_SET_FLAG(res & 0x1, F_CF); |
| 6809 | CONDITIONAL_SET_FLAG(s == 1 && |
| 6810 | XOR2((res & 0x1) + ((res >> 30) & 0x2)), |
| 6811 | F_OF); |
| 6812 | } if (s != 0) { |
| 6813 | /* set the new carry flag, Note that it is the low order bit |
| 6814 | * of the result!!! */ |
| 6815 | CONDITIONAL_SET_FLAG(res & 0x1, F_CF); |
| 6816 | } |
| 6817 | return res; |
| 6818 | } |
| 6819 | /**************************************************************************** |
| 6820 | REMARKS: |
| 6821 | Implements the ROR instruction and side effects. |
| 6822 | ****************************************************************************/ |
| 6823 | static uint8_t |
| 6824 | ror_byte(struct X86EMU *emu, uint8_t d, uint8_t s) |
| 6825 | { |
| 6826 | unsigned int res, cnt, mask; |
| 6827 | |
| 6828 | /* rotate right */ |
| 6829 | /* s is the rotate distance. It varies from 0 - 8. d is the byte |
| 6830 | * object rotated. |
| 6831 | * |
| 6832 | * have |
| 6833 | * |
| 6834 | * B_7 ... B_0 |
| 6835 | * |
| 6836 | * The rotate is done mod 8. |
| 6837 | * |
| 6838 | * IF n > 0 1) B_(8-(n+1)) .. B_(0) <- b_(7) .. b_(n) 2) B_(7) .. |
| 6839 | * B_(8-n) <- b_(n-1) .. b_(0) */ |
| 6840 | res = d; |
| 6841 | if ((cnt = s % 8) != 0) { /* not a typo, do nada if cnt==0 */ |
| 6842 | /* B_(7) .. B_(8-n) <- b_(n-1) .. b_(0) */ |
| 6843 | res = (d << (8 - cnt)); |
| 6844 | |
| 6845 | /* B_(8-(n+1)) .. B_(0) <- b_(7) .. b_(n) */ |
| 6846 | mask = (1 << (8 - cnt)) - 1; |
| 6847 | res |= (d >> (cnt)) & mask; |
| 6848 | |
| 6849 | /* set the new carry flag, Note that it is the low order bit |
| 6850 | * of the result!!! */ |
| 6851 | CONDITIONAL_SET_FLAG(res & 0x80, F_CF); |
| 6852 | /* OVERFLOW is set *IFF* s==1, then it is the xor of the two |
| 6853 | * most significant bits. Blecck. */ |
| 6854 | CONDITIONAL_SET_FLAG(s == 1 && XOR2(res >> 6), F_OF); |
| 6855 | } else if (s != 0) { |
| 6856 | /* set the new carry flag, Note that it is the low order bit |
| 6857 | * of the result!!! */ |
| 6858 | CONDITIONAL_SET_FLAG(res & 0x80, F_CF); |
| 6859 | } |
| 6860 | return (uint8_t) res; |
| 6861 | } |
| 6862 | /**************************************************************************** |
| 6863 | REMARKS: |
| 6864 | Implements the ROR instruction and side effects. |
| 6865 | ****************************************************************************/ |
| 6866 | static uint16_t |
| 6867 | ror_word(struct X86EMU *emu, uint16_t d, uint8_t s) |
| 6868 | { |
| 6869 | unsigned int res, cnt, mask; |
| 6870 | |
| 6871 | res = d; |
| 6872 | if ((cnt = s % 16) != 0) { |
| 6873 | res = (d << (16 - cnt)); |
| 6874 | mask = (1 << (16 - cnt)) - 1; |
| 6875 | res |= (d >> (cnt)) & mask; |
| 6876 | CONDITIONAL_SET_FLAG(res & 0x8000, F_CF); |
| 6877 | CONDITIONAL_SET_FLAG(s == 1 && XOR2(res >> 14), F_OF); |
| 6878 | } else if (s != 0) { |
| 6879 | /* set the new carry flag, Note that it is the low order bit |
| 6880 | * of the result!!! */ |
| 6881 | CONDITIONAL_SET_FLAG(res & 0x8000, F_CF); |
| 6882 | } |
| 6883 | return (uint16_t) res; |
| 6884 | } |
| 6885 | /**************************************************************************** |
| 6886 | REMARKS: |
| 6887 | Implements the ROR instruction and side effects. |
| 6888 | ****************************************************************************/ |
| 6889 | static uint32_t |
| 6890 | ror_long(struct X86EMU *emu, uint32_t d, uint8_t s) |
| 6891 | { |
| 6892 | uint32_t res, cnt, mask; |
| 6893 | |
| 6894 | res = d; |
| 6895 | if ((cnt = s % 32) != 0) { |
| 6896 | res = (d << (32 - cnt)); |
| 6897 | mask = (1 << (32 - cnt)) - 1; |
| 6898 | res |= (d >> (cnt)) & mask; |
| 6899 | CONDITIONAL_SET_FLAG(res & 0x80000000, F_CF); |
| 6900 | CONDITIONAL_SET_FLAG(s == 1 && XOR2(res >> 30), F_OF); |
| 6901 | } else if (s != 0) { |
| 6902 | /* set the new carry flag, Note that it is the low order bit |
| 6903 | * of the result!!! */ |
| 6904 | CONDITIONAL_SET_FLAG(res & 0x80000000, F_CF); |
| 6905 | } |
| 6906 | return res; |
| 6907 | } |
| 6908 | /**************************************************************************** |
| 6909 | REMARKS: |
| 6910 | Implements the SHL instruction and side effects. |
| 6911 | ****************************************************************************/ |
| 6912 | static uint8_t |
| 6913 | shl_byte(struct X86EMU *emu, uint8_t d, uint8_t s) |
| 6914 | { |
| 6915 | unsigned int cnt, res, cf; |
| 6916 | |
| 6917 | if (s < 8) { |
| 6918 | cnt = s % 8; |
| 6919 | |
| 6920 | /* last bit shifted out goes into carry flag */ |
| 6921 | if (cnt > 0) { |
| 6922 | res = d << cnt; |
| 6923 | cf = d & (1 << (8 - cnt)); |
| 6924 | CONDITIONAL_SET_FLAG(cf, F_CF); |
| 6925 | CONDITIONAL_SET_FLAG((res & 0xff) == 0, F_ZF); |
| 6926 | CONDITIONAL_SET_FLAG(res & 0x80, F_SF); |
| 6927 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 6928 | } else { |
| 6929 | res = (uint8_t) d; |
| 6930 | } |
| 6931 | |
| 6932 | if (cnt == 1) { |
| 6933 | /* Needs simplification. */ |
| 6934 | CONDITIONAL_SET_FLAG( |
| 6935 | (((res & 0x80) == 0x80) ^ |
| 6936 | (ACCESS_FLAG(F_CF) != 0)), |
| 6937 | /* was (emu->x86.R_FLG&F_CF)==F_CF)), */ |
| 6938 | F_OF); |
| 6939 | } else { |
| 6940 | CLEAR_FLAG(F_OF); |
| 6941 | } |
| 6942 | } else { |
| 6943 | res = 0; |
| 6944 | CONDITIONAL_SET_FLAG((d << (s - 1)) & 0x80, F_CF); |
| 6945 | CLEAR_FLAG(F_OF); |
| 6946 | CLEAR_FLAG(F_SF); |
| 6947 | SET_FLAG(F_PF); |
| 6948 | SET_FLAG(F_ZF); |
| 6949 | } |
| 6950 | return (uint8_t) res; |
| 6951 | } |
| 6952 | /**************************************************************************** |
| 6953 | REMARKS: |
| 6954 | Implements the SHL instruction and side effects. |
| 6955 | ****************************************************************************/ |
| 6956 | static uint16_t |
| 6957 | shl_word(struct X86EMU *emu, uint16_t d, uint8_t s) |
| 6958 | { |
| 6959 | unsigned int cnt, res, cf; |
| 6960 | |
| 6961 | if (s < 16) { |
| 6962 | cnt = s % 16; |
| 6963 | if (cnt > 0) { |
| 6964 | res = d << cnt; |
| 6965 | cf = d & (1 << (16 - cnt)); |
| 6966 | CONDITIONAL_SET_FLAG(cf, F_CF); |
| 6967 | CONDITIONAL_SET_FLAG((res & 0xffff) == 0, F_ZF); |
| 6968 | CONDITIONAL_SET_FLAG(res & 0x8000, F_SF); |
| 6969 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 6970 | } else { |
| 6971 | res = (uint16_t) d; |
| 6972 | } |
| 6973 | |
| 6974 | if (cnt == 1) { |
| 6975 | CONDITIONAL_SET_FLAG( |
| 6976 | (((res & 0x8000) == 0x8000) ^ |
| 6977 | (ACCESS_FLAG(F_CF) != 0)), |
| 6978 | F_OF); |
| 6979 | } else { |
| 6980 | CLEAR_FLAG(F_OF); |
| 6981 | } |
| 6982 | } else { |
| 6983 | res = 0; |
| 6984 | CONDITIONAL_SET_FLAG((d << (s - 1)) & 0x8000, F_CF); |
| 6985 | CLEAR_FLAG(F_OF); |
| 6986 | CLEAR_FLAG(F_SF); |
| 6987 | SET_FLAG(F_PF); |
| 6988 | SET_FLAG(F_ZF); |
| 6989 | } |
| 6990 | return (uint16_t) res; |
| 6991 | } |
| 6992 | /**************************************************************************** |
| 6993 | REMARKS: |
| 6994 | Implements the SHL instruction and side effects. |
| 6995 | ****************************************************************************/ |
| 6996 | static uint32_t |
| 6997 | shl_long(struct X86EMU *emu, uint32_t d, uint8_t s) |
| 6998 | { |
| 6999 | unsigned int cnt, res, cf; |
| 7000 | |
| 7001 | if (s < 32) { |
| 7002 | cnt = s % 32; |
| 7003 | if (cnt > 0) { |
| 7004 | res = d << cnt; |
| 7005 | cf = d & (1 << (32 - cnt)); |
| 7006 | CONDITIONAL_SET_FLAG(cf, F_CF); |
| 7007 | CONDITIONAL_SET_FLAG((res & 0xffffffff) == 0, F_ZF); |
| 7008 | CONDITIONAL_SET_FLAG(res & 0x80000000, F_SF); |
| 7009 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7010 | } else { |
| 7011 | res = d; |
| 7012 | } |
| 7013 | if (cnt == 1) { |
| 7014 | CONDITIONAL_SET_FLAG((((res & 0x80000000) == 0x80000000) ^ |
| 7015 | (ACCESS_FLAG(F_CF) != 0)), F_OF); |
| 7016 | } else { |
| 7017 | CLEAR_FLAG(F_OF); |
| 7018 | } |
| 7019 | } else { |
| 7020 | res = 0; |
| 7021 | CONDITIONAL_SET_FLAG((d << (s - 1)) & 0x80000000, F_CF); |
| 7022 | CLEAR_FLAG(F_OF); |
| 7023 | CLEAR_FLAG(F_SF); |
| 7024 | SET_FLAG(F_PF); |
| 7025 | SET_FLAG(F_ZF); |
| 7026 | } |
| 7027 | return res; |
| 7028 | } |
| 7029 | /**************************************************************************** |
| 7030 | REMARKS: |
| 7031 | Implements the SHR instruction and side effects. |
| 7032 | ****************************************************************************/ |
| 7033 | static uint8_t |
| 7034 | shr_byte(struct X86EMU *emu, uint8_t d, uint8_t s) |
| 7035 | { |
| 7036 | unsigned int cnt, res, cf; |
| 7037 | |
| 7038 | if (s < 8) { |
| 7039 | cnt = s % 8; |
| 7040 | if (cnt > 0) { |
| 7041 | cf = d & (1 << (cnt - 1)); |
| 7042 | res = d >> cnt; |
| 7043 | CONDITIONAL_SET_FLAG(cf, F_CF); |
| 7044 | CONDITIONAL_SET_FLAG((res & 0xff) == 0, F_ZF); |
| 7045 | CONDITIONAL_SET_FLAG(res & 0x80, F_SF); |
| 7046 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7047 | } else { |
| 7048 | res = (uint8_t) d; |
| 7049 | } |
| 7050 | |
| 7051 | if (cnt == 1) { |
| 7052 | CONDITIONAL_SET_FLAG(XOR2(res >> 6), F_OF); |
| 7053 | } else { |
| 7054 | CLEAR_FLAG(F_OF); |
| 7055 | } |
| 7056 | } else { |
| 7057 | res = 0; |
| 7058 | CONDITIONAL_SET_FLAG((d >> (s - 1)) & 0x1, F_CF); |
| 7059 | CLEAR_FLAG(F_OF); |
| 7060 | CLEAR_FLAG(F_SF); |
| 7061 | SET_FLAG(F_PF); |
| 7062 | SET_FLAG(F_ZF); |
| 7063 | } |
| 7064 | return (uint8_t) res; |
| 7065 | } |
| 7066 | /**************************************************************************** |
| 7067 | REMARKS: |
| 7068 | Implements the SHR instruction and side effects. |
| 7069 | ****************************************************************************/ |
| 7070 | static uint16_t |
| 7071 | shr_word(struct X86EMU *emu, uint16_t d, uint8_t s) |
| 7072 | { |
| 7073 | unsigned int cnt, res, cf; |
| 7074 | |
| 7075 | if (s < 16) { |
| 7076 | cnt = s % 16; |
| 7077 | if (cnt > 0) { |
| 7078 | cf = d & (1 << (cnt - 1)); |
| 7079 | res = d >> cnt; |
| 7080 | CONDITIONAL_SET_FLAG(cf, F_CF); |
| 7081 | CONDITIONAL_SET_FLAG((res & 0xffff) == 0, F_ZF); |
| 7082 | CONDITIONAL_SET_FLAG(res & 0x8000, F_SF); |
| 7083 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7084 | } else { |
| 7085 | res = d; |
| 7086 | } |
| 7087 | |
| 7088 | if (cnt == 1) { |
| 7089 | CONDITIONAL_SET_FLAG(XOR2(res >> 14), F_OF); |
| 7090 | } else { |
| 7091 | CLEAR_FLAG(F_OF); |
| 7092 | } |
| 7093 | } else { |
| 7094 | res = 0; |
| 7095 | CLEAR_FLAG(F_CF); |
| 7096 | CLEAR_FLAG(F_OF); |
| 7097 | SET_FLAG(F_ZF); |
| 7098 | CLEAR_FLAG(F_SF); |
| 7099 | CLEAR_FLAG(F_PF); |
| 7100 | } |
| 7101 | return (uint16_t) res; |
| 7102 | } |
| 7103 | /**************************************************************************** |
| 7104 | REMARKS: |
| 7105 | Implements the SHR instruction and side effects. |
| 7106 | ****************************************************************************/ |
| 7107 | static uint32_t |
| 7108 | shr_long(struct X86EMU *emu, uint32_t d, uint8_t s) |
| 7109 | { |
| 7110 | unsigned int cnt, res, cf; |
| 7111 | |
| 7112 | if (s < 32) { |
| 7113 | cnt = s % 32; |
| 7114 | if (cnt > 0) { |
| 7115 | cf = d & (1 << (cnt - 1)); |
| 7116 | res = d >> cnt; |
| 7117 | CONDITIONAL_SET_FLAG(cf, F_CF); |
| 7118 | CONDITIONAL_SET_FLAG((res & 0xffffffff) == 0, F_ZF); |
| 7119 | CONDITIONAL_SET_FLAG(res & 0x80000000, F_SF); |
| 7120 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7121 | } else { |
| 7122 | res = d; |
| 7123 | } |
| 7124 | if (cnt == 1) { |
| 7125 | CONDITIONAL_SET_FLAG(XOR2(res >> 30), F_OF); |
| 7126 | } else { |
| 7127 | CLEAR_FLAG(F_OF); |
| 7128 | } |
| 7129 | } else { |
| 7130 | res = 0; |
| 7131 | CLEAR_FLAG(F_CF); |
| 7132 | CLEAR_FLAG(F_OF); |
| 7133 | SET_FLAG(F_ZF); |
| 7134 | CLEAR_FLAG(F_SF); |
| 7135 | CLEAR_FLAG(F_PF); |
| 7136 | } |
| 7137 | return res; |
| 7138 | } |
| 7139 | /**************************************************************************** |
| 7140 | REMARKS: |
| 7141 | Implements the SAR instruction and side effects. |
| 7142 | ****************************************************************************/ |
| 7143 | static uint8_t |
| 7144 | sar_byte(struct X86EMU *emu, uint8_t d, uint8_t s) |
| 7145 | { |
| 7146 | unsigned int cnt, res, cf, mask, sf; |
| 7147 | |
| 7148 | res = d; |
| 7149 | sf = d & 0x80; |
| 7150 | cnt = s % 8; |
| 7151 | if (cnt > 0 && cnt < 8) { |
| 7152 | mask = (1 << (8 - cnt)) - 1; |
| 7153 | cf = d & (1 << (cnt - 1)); |
| 7154 | res = (d >> cnt) & mask; |
| 7155 | CONDITIONAL_SET_FLAG(cf, F_CF); |
| 7156 | if (sf) { |
| 7157 | res |= ~mask; |
| 7158 | } |
| 7159 | CONDITIONAL_SET_FLAG((res & 0xff) == 0, F_ZF); |
| 7160 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7161 | CONDITIONAL_SET_FLAG(res & 0x80, F_SF); |
| 7162 | } else if (cnt >= 8) { |
| 7163 | if (sf) { |
| 7164 | res = 0xff; |
| 7165 | SET_FLAG(F_CF); |
| 7166 | CLEAR_FLAG(F_ZF); |
| 7167 | SET_FLAG(F_SF); |
| 7168 | SET_FLAG(F_PF); |
| 7169 | } else { |
| 7170 | res = 0; |
| 7171 | CLEAR_FLAG(F_CF); |
| 7172 | SET_FLAG(F_ZF); |
| 7173 | CLEAR_FLAG(F_SF); |
| 7174 | CLEAR_FLAG(F_PF); |
| 7175 | } |
| 7176 | } |
| 7177 | return (uint8_t) res; |
| 7178 | } |
| 7179 | /**************************************************************************** |
| 7180 | REMARKS: |
| 7181 | Implements the SAR instruction and side effects. |
| 7182 | ****************************************************************************/ |
| 7183 | static uint16_t |
| 7184 | sar_word(struct X86EMU *emu, uint16_t d, uint8_t s) |
| 7185 | { |
| 7186 | unsigned int cnt, res, cf, mask, sf; |
| 7187 | |
| 7188 | sf = d & 0x8000; |
| 7189 | cnt = s % 16; |
| 7190 | res = d; |
| 7191 | if (cnt > 0 && cnt < 16) { |
| 7192 | mask = (1 << (16 - cnt)) - 1; |
| 7193 | cf = d & (1 << (cnt - 1)); |
| 7194 | res = (d >> cnt) & mask; |
| 7195 | CONDITIONAL_SET_FLAG(cf, F_CF); |
| 7196 | if (sf) { |
| 7197 | res |= ~mask; |
| 7198 | } |
| 7199 | CONDITIONAL_SET_FLAG((res & 0xffff) == 0, F_ZF); |
| 7200 | CONDITIONAL_SET_FLAG(res & 0x8000, F_SF); |
| 7201 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7202 | } else if (cnt >= 16) { |
| 7203 | if (sf) { |
| 7204 | res = 0xffff; |
| 7205 | SET_FLAG(F_CF); |
| 7206 | CLEAR_FLAG(F_ZF); |
| 7207 | SET_FLAG(F_SF); |
| 7208 | SET_FLAG(F_PF); |
| 7209 | } else { |
| 7210 | res = 0; |
| 7211 | CLEAR_FLAG(F_CF); |
| 7212 | SET_FLAG(F_ZF); |
| 7213 | CLEAR_FLAG(F_SF); |
| 7214 | CLEAR_FLAG(F_PF); |
| 7215 | } |
| 7216 | } |
| 7217 | return (uint16_t) res; |
| 7218 | } |
| 7219 | /**************************************************************************** |
| 7220 | REMARKS: |
| 7221 | Implements the SAR instruction and side effects. |
| 7222 | ****************************************************************************/ |
| 7223 | static uint32_t |
| 7224 | sar_long(struct X86EMU *emu, uint32_t d, uint8_t s) |
| 7225 | { |
| 7226 | uint32_t cnt, res, cf, mask, sf; |
| 7227 | |
| 7228 | sf = d & 0x80000000; |
| 7229 | cnt = s % 32; |
| 7230 | res = d; |
| 7231 | if (cnt > 0 && cnt < 32) { |
| 7232 | mask = (1 << (32 - cnt)) - 1; |
| 7233 | cf = d & (1 << (cnt - 1)); |
| 7234 | res = (d >> cnt) & mask; |
| 7235 | CONDITIONAL_SET_FLAG(cf, F_CF); |
| 7236 | if (sf) { |
| 7237 | res |= ~mask; |
| 7238 | } |
| 7239 | CONDITIONAL_SET_FLAG((res & 0xffffffff) == 0, F_ZF); |
| 7240 | CONDITIONAL_SET_FLAG(res & 0x80000000, F_SF); |
| 7241 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7242 | } else if (cnt >= 32) { |
| 7243 | if (sf) { |
| 7244 | res = 0xffffffff; |
| 7245 | SET_FLAG(F_CF); |
| 7246 | CLEAR_FLAG(F_ZF); |
| 7247 | SET_FLAG(F_SF); |
| 7248 | SET_FLAG(F_PF); |
| 7249 | } else { |
| 7250 | res = 0; |
| 7251 | CLEAR_FLAG(F_CF); |
| 7252 | SET_FLAG(F_ZF); |
| 7253 | CLEAR_FLAG(F_SF); |
| 7254 | CLEAR_FLAG(F_PF); |
| 7255 | } |
| 7256 | } |
| 7257 | return res; |
| 7258 | } |
| 7259 | /**************************************************************************** |
| 7260 | REMARKS: |
| 7261 | Implements the SHLD instruction and side effects. |
| 7262 | ****************************************************************************/ |
| 7263 | static uint16_t |
| 7264 | shld_word(struct X86EMU *emu, uint16_t d, uint16_t fill, uint8_t s) |
| 7265 | { |
| 7266 | unsigned int cnt, res, cf; |
| 7267 | |
| 7268 | if (s < 16) { |
| 7269 | cnt = s % 16; |
| 7270 | if (cnt > 0) { |
| 7271 | res = (d << cnt) | (fill >> (16 - cnt)); |
| 7272 | cf = d & (1 << (16 - cnt)); |
| 7273 | CONDITIONAL_SET_FLAG(cf, F_CF); |
| 7274 | CONDITIONAL_SET_FLAG((res & 0xffff) == 0, F_ZF); |
| 7275 | CONDITIONAL_SET_FLAG(res & 0x8000, F_SF); |
| 7276 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7277 | } else { |
| 7278 | res = d; |
| 7279 | } |
| 7280 | if (cnt == 1) { |
| 7281 | CONDITIONAL_SET_FLAG((((res & 0x8000) == 0x8000) ^ |
| 7282 | (ACCESS_FLAG(F_CF) != 0)), F_OF); |
| 7283 | } else { |
| 7284 | CLEAR_FLAG(F_OF); |
| 7285 | } |
| 7286 | } else { |
| 7287 | res = 0; |
| 7288 | CONDITIONAL_SET_FLAG((d << (s - 1)) & 0x8000, F_CF); |
| 7289 | CLEAR_FLAG(F_OF); |
| 7290 | CLEAR_FLAG(F_SF); |
| 7291 | SET_FLAG(F_PF); |
| 7292 | SET_FLAG(F_ZF); |
| 7293 | } |
| 7294 | return (uint16_t) res; |
| 7295 | } |
| 7296 | /**************************************************************************** |
| 7297 | REMARKS: |
| 7298 | Implements the SHLD instruction and side effects. |
| 7299 | ****************************************************************************/ |
| 7300 | static uint32_t |
| 7301 | shld_long(struct X86EMU *emu, uint32_t d, uint32_t fill, uint8_t s) |
| 7302 | { |
| 7303 | unsigned int cnt, res, cf; |
| 7304 | |
| 7305 | if (s < 32) { |
| 7306 | cnt = s % 32; |
| 7307 | if (cnt > 0) { |
| 7308 | res = (d << cnt) | (fill >> (32 - cnt)); |
| 7309 | cf = d & (1 << (32 - cnt)); |
| 7310 | CONDITIONAL_SET_FLAG(cf, F_CF); |
| 7311 | CONDITIONAL_SET_FLAG((res & 0xffffffff) == 0, F_ZF); |
| 7312 | CONDITIONAL_SET_FLAG(res & 0x80000000, F_SF); |
| 7313 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7314 | } else { |
| 7315 | res = d; |
| 7316 | } |
| 7317 | if (cnt == 1) { |
| 7318 | CONDITIONAL_SET_FLAG((((res & 0x80000000) == 0x80000000) ^ |
| 7319 | (ACCESS_FLAG(F_CF) != 0)), F_OF); |
| 7320 | } else { |
| 7321 | CLEAR_FLAG(F_OF); |
| 7322 | } |
| 7323 | } else { |
| 7324 | res = 0; |
| 7325 | CONDITIONAL_SET_FLAG((d << (s - 1)) & 0x80000000, F_CF); |
| 7326 | CLEAR_FLAG(F_OF); |
| 7327 | CLEAR_FLAG(F_SF); |
| 7328 | SET_FLAG(F_PF); |
| 7329 | SET_FLAG(F_ZF); |
| 7330 | } |
| 7331 | return res; |
| 7332 | } |
| 7333 | /**************************************************************************** |
| 7334 | REMARKS: |
| 7335 | Implements the SHRD instruction and side effects. |
| 7336 | ****************************************************************************/ |
| 7337 | static uint16_t |
| 7338 | shrd_word(struct X86EMU *emu, uint16_t d, uint16_t fill, uint8_t s) |
| 7339 | { |
| 7340 | unsigned int cnt, res, cf; |
| 7341 | |
| 7342 | if (s < 16) { |
| 7343 | cnt = s % 16; |
| 7344 | if (cnt > 0) { |
| 7345 | cf = d & (1 << (cnt - 1)); |
| 7346 | res = (d >> cnt) | (fill << (16 - cnt)); |
| 7347 | CONDITIONAL_SET_FLAG(cf, F_CF); |
| 7348 | CONDITIONAL_SET_FLAG((res & 0xffff) == 0, F_ZF); |
| 7349 | CONDITIONAL_SET_FLAG(res & 0x8000, F_SF); |
| 7350 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7351 | } else { |
| 7352 | res = d; |
| 7353 | } |
| 7354 | |
| 7355 | if (cnt == 1) { |
| 7356 | CONDITIONAL_SET_FLAG(XOR2(res >> 14), F_OF); |
| 7357 | } else { |
| 7358 | CLEAR_FLAG(F_OF); |
| 7359 | } |
| 7360 | } else { |
| 7361 | res = 0; |
| 7362 | CLEAR_FLAG(F_CF); |
| 7363 | CLEAR_FLAG(F_OF); |
| 7364 | SET_FLAG(F_ZF); |
| 7365 | CLEAR_FLAG(F_SF); |
| 7366 | CLEAR_FLAG(F_PF); |
| 7367 | } |
| 7368 | return (uint16_t) res; |
| 7369 | } |
| 7370 | /**************************************************************************** |
| 7371 | REMARKS: |
| 7372 | Implements the SHRD instruction and side effects. |
| 7373 | ****************************************************************************/ |
| 7374 | static uint32_t |
| 7375 | shrd_long(struct X86EMU *emu, uint32_t d, uint32_t fill, uint8_t s) |
| 7376 | { |
| 7377 | unsigned int cnt, res, cf; |
| 7378 | |
| 7379 | if (s < 32) { |
| 7380 | cnt = s % 32; |
| 7381 | if (cnt > 0) { |
| 7382 | cf = d & (1 << (cnt - 1)); |
| 7383 | res = (d >> cnt) | (fill << (32 - cnt)); |
| 7384 | CONDITIONAL_SET_FLAG(cf, F_CF); |
| 7385 | CONDITIONAL_SET_FLAG((res & 0xffffffff) == 0, F_ZF); |
| 7386 | CONDITIONAL_SET_FLAG(res & 0x80000000, F_SF); |
| 7387 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7388 | } else { |
| 7389 | res = d; |
| 7390 | } |
| 7391 | if (cnt == 1) { |
| 7392 | CONDITIONAL_SET_FLAG(XOR2(res >> 30), F_OF); |
| 7393 | } else { |
| 7394 | CLEAR_FLAG(F_OF); |
| 7395 | } |
| 7396 | } else { |
| 7397 | res = 0; |
| 7398 | CLEAR_FLAG(F_CF); |
| 7399 | CLEAR_FLAG(F_OF); |
| 7400 | SET_FLAG(F_ZF); |
| 7401 | CLEAR_FLAG(F_SF); |
| 7402 | CLEAR_FLAG(F_PF); |
| 7403 | } |
| 7404 | return res; |
| 7405 | } |
| 7406 | /**************************************************************************** |
| 7407 | REMARKS: |
| 7408 | Implements the SBB instruction and side effects. |
| 7409 | ****************************************************************************/ |
| 7410 | static uint8_t |
| 7411 | sbb_byte(struct X86EMU *emu, uint8_t d, uint8_t s) |
| 7412 | { |
| 7413 | uint32_t res; /* all operands in native machine order */ |
| 7414 | uint32_t bc; |
| 7415 | |
| 7416 | if (ACCESS_FLAG(F_CF)) |
| 7417 | res = d - s - 1; |
| 7418 | else |
| 7419 | res = d - s; |
| 7420 | CONDITIONAL_SET_FLAG(res & 0x80, F_SF); |
| 7421 | CONDITIONAL_SET_FLAG((res & 0xff) == 0, F_ZF); |
| 7422 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7423 | |
| 7424 | /* calculate the borrow chain. See note at top */ |
| 7425 | bc = (res & (~d | s)) | (~d & s); |
| 7426 | CONDITIONAL_SET_FLAG(bc & 0x80, F_CF); |
| 7427 | CONDITIONAL_SET_FLAG(XOR2(bc >> 6), F_OF); |
| 7428 | CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); |
| 7429 | return (uint8_t) res; |
| 7430 | } |
| 7431 | /**************************************************************************** |
| 7432 | REMARKS: |
| 7433 | Implements the SBB instruction and side effects. |
| 7434 | ****************************************************************************/ |
| 7435 | static uint16_t |
| 7436 | sbb_word(struct X86EMU *emu, uint16_t d, uint16_t s) |
| 7437 | { |
| 7438 | uint32_t res; /* all operands in native machine order */ |
| 7439 | uint32_t bc; |
| 7440 | |
| 7441 | if (ACCESS_FLAG(F_CF)) |
| 7442 | res = d - s - 1; |
| 7443 | else |
| 7444 | res = d - s; |
| 7445 | CONDITIONAL_SET_FLAG(res & 0x8000, F_SF); |
| 7446 | CONDITIONAL_SET_FLAG((res & 0xffff) == 0, F_ZF); |
| 7447 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7448 | |
| 7449 | /* calculate the borrow chain. See note at top */ |
| 7450 | bc = (res & (~d | s)) | (~d & s); |
| 7451 | CONDITIONAL_SET_FLAG(bc & 0x8000, F_CF); |
| 7452 | CONDITIONAL_SET_FLAG(XOR2(bc >> 14), F_OF); |
| 7453 | CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); |
| 7454 | return (uint16_t) res; |
| 7455 | } |
| 7456 | /**************************************************************************** |
| 7457 | REMARKS: |
| 7458 | Implements the SBB instruction and side effects. |
| 7459 | ****************************************************************************/ |
| 7460 | static uint32_t |
| 7461 | sbb_long(struct X86EMU *emu, uint32_t d, uint32_t s) |
| 7462 | { |
| 7463 | uint32_t res; /* all operands in native machine order */ |
| 7464 | uint32_t bc; |
| 7465 | |
| 7466 | if (ACCESS_FLAG(F_CF)) |
| 7467 | res = d - s - 1; |
| 7468 | else |
| 7469 | res = d - s; |
| 7470 | CONDITIONAL_SET_FLAG(res & 0x80000000, F_SF); |
| 7471 | CONDITIONAL_SET_FLAG((res & 0xffffffff) == 0, F_ZF); |
| 7472 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7473 | |
| 7474 | /* calculate the borrow chain. See note at top */ |
| 7475 | bc = (res & (~d | s)) | (~d & s); |
| 7476 | CONDITIONAL_SET_FLAG(bc & 0x80000000, F_CF); |
| 7477 | CONDITIONAL_SET_FLAG(XOR2(bc >> 30), F_OF); |
| 7478 | CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); |
| 7479 | return res; |
| 7480 | } |
| 7481 | /**************************************************************************** |
| 7482 | REMARKS: |
| 7483 | Implements the SUB instruction and side effects. |
| 7484 | ****************************************************************************/ |
| 7485 | static uint8_t |
| 7486 | sub_byte(struct X86EMU *emu, uint8_t d, uint8_t s) |
| 7487 | { |
| 7488 | uint32_t res; /* all operands in native machine order */ |
| 7489 | uint32_t bc; |
| 7490 | |
| 7491 | res = d - s; |
| 7492 | CONDITIONAL_SET_FLAG(res & 0x80, F_SF); |
| 7493 | CONDITIONAL_SET_FLAG((res & 0xff) == 0, F_ZF); |
| 7494 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7495 | |
| 7496 | /* calculate the borrow chain. See note at top */ |
| 7497 | bc = (res & (~d | s)) | (~d & s); |
| 7498 | CONDITIONAL_SET_FLAG(bc & 0x80, F_CF); |
| 7499 | CONDITIONAL_SET_FLAG(XOR2(bc >> 6), F_OF); |
| 7500 | CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); |
| 7501 | return (uint8_t) res; |
| 7502 | } |
| 7503 | /**************************************************************************** |
| 7504 | REMARKS: |
| 7505 | Implements the SUB instruction and side effects. |
| 7506 | ****************************************************************************/ |
| 7507 | static uint16_t |
| 7508 | sub_word(struct X86EMU *emu, uint16_t d, uint16_t s) |
| 7509 | { |
| 7510 | uint32_t res; /* all operands in native machine order */ |
| 7511 | uint32_t bc; |
| 7512 | |
| 7513 | res = d - s; |
| 7514 | CONDITIONAL_SET_FLAG(res & 0x8000, F_SF); |
| 7515 | CONDITIONAL_SET_FLAG((res & 0xffff) == 0, F_ZF); |
| 7516 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7517 | |
| 7518 | /* calculate the borrow chain. See note at top */ |
| 7519 | bc = (res & (~d | s)) | (~d & s); |
| 7520 | CONDITIONAL_SET_FLAG(bc & 0x8000, F_CF); |
| 7521 | CONDITIONAL_SET_FLAG(XOR2(bc >> 14), F_OF); |
| 7522 | CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); |
| 7523 | return (uint16_t) res; |
| 7524 | } |
| 7525 | /**************************************************************************** |
| 7526 | REMARKS: |
| 7527 | Implements the SUB instruction and side effects. |
| 7528 | ****************************************************************************/ |
| 7529 | static uint32_t |
| 7530 | sub_long(struct X86EMU *emu, uint32_t d, uint32_t s) |
| 7531 | { |
| 7532 | uint32_t res; /* all operands in native machine order */ |
| 7533 | uint32_t bc; |
| 7534 | |
| 7535 | res = d - s; |
| 7536 | CONDITIONAL_SET_FLAG(res & 0x80000000, F_SF); |
| 7537 | CONDITIONAL_SET_FLAG((res & 0xffffffff) == 0, F_ZF); |
| 7538 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7539 | |
| 7540 | /* calculate the borrow chain. See note at top */ |
| 7541 | bc = (res & (~d | s)) | (~d & s); |
| 7542 | CONDITIONAL_SET_FLAG(bc & 0x80000000, F_CF); |
| 7543 | CONDITIONAL_SET_FLAG(XOR2(bc >> 30), F_OF); |
| 7544 | CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); |
| 7545 | return res; |
| 7546 | } |
| 7547 | /**************************************************************************** |
| 7548 | REMARKS: |
| 7549 | Implements the TEST instruction and side effects. |
| 7550 | ****************************************************************************/ |
| 7551 | static void |
| 7552 | test_byte(struct X86EMU *emu, uint8_t d, uint8_t s) |
| 7553 | { |
| 7554 | uint32_t res; /* all operands in native machine order */ |
| 7555 | |
| 7556 | res = d & s; |
| 7557 | |
| 7558 | CLEAR_FLAG(F_OF); |
| 7559 | CONDITIONAL_SET_FLAG(res & 0x80, F_SF); |
| 7560 | CONDITIONAL_SET_FLAG(res == 0, F_ZF); |
| 7561 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7562 | /* AF == dont care */ |
| 7563 | CLEAR_FLAG(F_CF); |
| 7564 | } |
| 7565 | /**************************************************************************** |
| 7566 | REMARKS: |
| 7567 | Implements the TEST instruction and side effects. |
| 7568 | ****************************************************************************/ |
| 7569 | static void |
| 7570 | test_word(struct X86EMU *emu, uint16_t d, uint16_t s) |
| 7571 | { |
| 7572 | uint32_t res; /* all operands in native machine order */ |
| 7573 | |
| 7574 | res = d & s; |
| 7575 | |
| 7576 | CLEAR_FLAG(F_OF); |
| 7577 | CONDITIONAL_SET_FLAG(res & 0x8000, F_SF); |
| 7578 | CONDITIONAL_SET_FLAG(res == 0, F_ZF); |
| 7579 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7580 | /* AF == dont care */ |
| 7581 | CLEAR_FLAG(F_CF); |
| 7582 | } |
| 7583 | /**************************************************************************** |
| 7584 | REMARKS: |
| 7585 | Implements the TEST instruction and side effects. |
| 7586 | ****************************************************************************/ |
| 7587 | static void |
| 7588 | test_long(struct X86EMU *emu, uint32_t d, uint32_t s) |
| 7589 | { |
| 7590 | uint32_t res; /* all operands in native machine order */ |
| 7591 | |
| 7592 | res = d & s; |
| 7593 | |
| 7594 | CLEAR_FLAG(F_OF); |
| 7595 | CONDITIONAL_SET_FLAG(res & 0x80000000, F_SF); |
| 7596 | CONDITIONAL_SET_FLAG(res == 0, F_ZF); |
| 7597 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7598 | /* AF == dont care */ |
| 7599 | CLEAR_FLAG(F_CF); |
| 7600 | } |
| 7601 | /**************************************************************************** |
| 7602 | REMARKS: |
| 7603 | Implements the XOR instruction and side effects. |
| 7604 | ****************************************************************************/ |
| 7605 | static uint8_t |
| 7606 | xor_byte(struct X86EMU *emu, uint8_t d, uint8_t s) |
| 7607 | { |
| 7608 | uint8_t res; /* all operands in native machine order */ |
| 7609 | |
| 7610 | res = d ^ s; |
| 7611 | CLEAR_FLAG(F_OF); |
| 7612 | CONDITIONAL_SET_FLAG(res & 0x80, F_SF); |
| 7613 | CONDITIONAL_SET_FLAG(res == 0, F_ZF); |
| 7614 | CONDITIONAL_SET_FLAG(PARITY(res), F_PF); |
| 7615 | CLEAR_FLAG(F_CF); |
| 7616 | CLEAR_FLAG(F_AF); |
| 7617 | return res; |
| 7618 | } |
| 7619 | /**************************************************************************** |
| 7620 | REMARKS: |
| 7621 | Implements the XOR instruction and side effects. |
| 7622 | ****************************************************************************/ |
| 7623 | static uint16_t |
| 7624 | xor_word(struct X86EMU *emu, uint16_t d, uint16_t s) |
| 7625 | { |
| 7626 | uint16_t res; /* all operands in native machine order */ |
| 7627 | |
| 7628 | res = d ^ s; |
| 7629 | CLEAR_FLAG(F_OF); |
| 7630 | CONDITIONAL_SET_FLAG(res & 0x8000, F_SF); |
| 7631 | CONDITIONAL_SET_FLAG(res == 0, F_ZF); |
| 7632 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7633 | CLEAR_FLAG(F_CF); |
| 7634 | CLEAR_FLAG(F_AF); |
| 7635 | return res; |
| 7636 | } |
| 7637 | /**************************************************************************** |
| 7638 | REMARKS: |
| 7639 | Implements the XOR instruction and side effects. |
| 7640 | ****************************************************************************/ |
| 7641 | static uint32_t |
| 7642 | xor_long(struct X86EMU *emu, uint32_t d, uint32_t s) |
| 7643 | { |
| 7644 | uint32_t res; /* all operands in native machine order */ |
| 7645 | |
| 7646 | res = d ^ s; |
| 7647 | CLEAR_FLAG(F_OF); |
| 7648 | CONDITIONAL_SET_FLAG(res & 0x80000000, F_SF); |
| 7649 | CONDITIONAL_SET_FLAG(res == 0, F_ZF); |
| 7650 | CONDITIONAL_SET_FLAG(PARITY(res & 0xff), F_PF); |
| 7651 | CLEAR_FLAG(F_CF); |
| 7652 | CLEAR_FLAG(F_AF); |
| 7653 | return res; |
| 7654 | } |
| 7655 | /**************************************************************************** |
| 7656 | REMARKS: |
| 7657 | Implements the IMUL instruction and side effects. |
| 7658 | ****************************************************************************/ |
| 7659 | static void |
| 7660 | imul_byte(struct X86EMU *emu, uint8_t s) |
| 7661 | { |
| 7662 | int16_t res = (int16_t) ((int8_t) emu->x86.R_AL * (int8_t) s); |
| 7663 | |
| 7664 | emu->x86.R_AX = res; |
| 7665 | if (((emu->x86.R_AL & 0x80) == 0 && emu->x86.R_AH == 0x00) || |
| 7666 | ((emu->x86.R_AL & 0x80) != 0 && emu->x86.R_AH == 0xFF)) { |
| 7667 | CLEAR_FLAG(F_CF); |
| 7668 | CLEAR_FLAG(F_OF); |
| 7669 | } else { |
| 7670 | SET_FLAG(F_CF); |
| 7671 | SET_FLAG(F_OF); |
| 7672 | } |
| 7673 | } |
| 7674 | /**************************************************************************** |
| 7675 | REMARKS: |
| 7676 | Implements the IMUL instruction and side effects. |
| 7677 | ****************************************************************************/ |
| 7678 | static void |
| 7679 | imul_word(struct X86EMU *emu, uint16_t s) |
| 7680 | { |
| 7681 | int32_t res = (int16_t) emu->x86.R_AX * (int16_t) s; |
| 7682 | |
| 7683 | emu->x86.R_AX = (uint16_t) res; |
| 7684 | emu->x86.R_DX = (uint16_t) (res >> 16); |
| 7685 | if (((emu->x86.R_AX & 0x8000) == 0 && emu->x86.R_DX == 0x00) || |
| 7686 | ((emu->x86.R_AX & 0x8000) != 0 && emu->x86.R_DX == 0xFF)) { |
| 7687 | CLEAR_FLAG(F_CF); |
| 7688 | CLEAR_FLAG(F_OF); |
| 7689 | } else { |
| 7690 | SET_FLAG(F_CF); |
| 7691 | SET_FLAG(F_OF); |
| 7692 | } |
| 7693 | } |
| 7694 | /**************************************************************************** |
| 7695 | REMARKS: |
| 7696 | Implements the IMUL instruction and side effects. |
| 7697 | ****************************************************************************/ |
| 7698 | static void |
| 7699 | imul_long(struct X86EMU *emu, uint32_t s) |
| 7700 | { |
| 7701 | int64_t res; |
| 7702 | |
| 7703 | res = (int64_t)(int32_t)emu->x86.R_EAX * (int32_t)s; |
| 7704 | emu->x86.R_EAX = (uint32_t)res; |
| 7705 | emu->x86.R_EDX = ((uint64_t)res) >> 32; |
| 7706 | if (((emu->x86.R_EAX & 0x80000000) == 0 && emu->x86.R_EDX == 0x00) || |
| 7707 | ((emu->x86.R_EAX & 0x80000000) != 0 && emu->x86.R_EDX == 0xFF)) { |
| 7708 | CLEAR_FLAG(F_CF); |
| 7709 | CLEAR_FLAG(F_OF); |
| 7710 | } else { |
| 7711 | SET_FLAG(F_CF); |
| 7712 | SET_FLAG(F_OF); |
| 7713 | } |
| 7714 | } |
| 7715 | /**************************************************************************** |
| 7716 | REMARKS: |
| 7717 | Implements the MUL instruction and side effects. |
| 7718 | ****************************************************************************/ |
| 7719 | static void |
| 7720 | mul_byte(struct X86EMU *emu, uint8_t s) |
| 7721 | { |
| 7722 | uint16_t res = (uint16_t) (emu->x86.R_AL * s); |
| 7723 | |
| 7724 | emu->x86.R_AX = res; |
| 7725 | if (emu->x86.R_AH == 0) { |
| 7726 | CLEAR_FLAG(F_CF); |
| 7727 | CLEAR_FLAG(F_OF); |
| 7728 | } else { |
| 7729 | SET_FLAG(F_CF); |
| 7730 | SET_FLAG(F_OF); |
| 7731 | } |
| 7732 | } |
| 7733 | /**************************************************************************** |
| 7734 | REMARKS: |
| 7735 | Implements the MUL instruction and side effects. |
| 7736 | ****************************************************************************/ |
| 7737 | static void |
| 7738 | mul_word(struct X86EMU *emu, uint16_t s) |
| 7739 | { |
| 7740 | uint32_t res = emu->x86.R_AX * s; |
| 7741 | |
| 7742 | emu->x86.R_AX = (uint16_t) res; |
| 7743 | emu->x86.R_DX = (uint16_t) (res >> 16); |
| 7744 | if (emu->x86.R_DX == 0) { |
| 7745 | CLEAR_FLAG(F_CF); |
| 7746 | CLEAR_FLAG(F_OF); |
| 7747 | } else { |
| 7748 | SET_FLAG(F_CF); |
| 7749 | SET_FLAG(F_OF); |
| 7750 | } |
| 7751 | } |
| 7752 | /**************************************************************************** |
| 7753 | REMARKS: |
| 7754 | Implements the MUL instruction and side effects. |
| 7755 | ****************************************************************************/ |
| 7756 | static void |
| 7757 | mul_long(struct X86EMU *emu, uint32_t s) |
| 7758 | { |
| 7759 | uint64_t res = (uint64_t) emu->x86.R_EAX * s; |
| 7760 | |
| 7761 | emu->x86.R_EAX = (uint32_t) res; |
| 7762 | emu->x86.R_EDX = (uint32_t) (res >> 32); |
| 7763 | |
| 7764 | if (emu->x86.R_EDX == 0) { |
| 7765 | CLEAR_FLAG(F_CF); |
| 7766 | CLEAR_FLAG(F_OF); |
| 7767 | } else { |
| 7768 | SET_FLAG(F_CF); |
| 7769 | SET_FLAG(F_OF); |
| 7770 | } |
| 7771 | } |
| 7772 | /**************************************************************************** |
| 7773 | REMARKS: |
| 7774 | Implements the IDIV instruction and side effects. |
| 7775 | ****************************************************************************/ |
| 7776 | static void |
| 7777 | idiv_byte(struct X86EMU *emu, uint8_t s) |
| 7778 | { |
| 7779 | int32_t dvd, div, mod; |
| 7780 | |
| 7781 | dvd = (int16_t) emu->x86.R_AX; |
| 7782 | if (s == 0) { |
| 7783 | x86emu_intr_raise(emu, 8); |
| 7784 | return; |
| 7785 | } |
| 7786 | div = dvd / (int8_t) s; |
| 7787 | mod = dvd % (int8_t) s; |
| 7788 | if (div > 0x7f || div < -0x7f) { |
| 7789 | x86emu_intr_raise(emu, 8); |
| 7790 | return; |
| 7791 | } |
| 7792 | emu->x86.R_AL = (int8_t) div; |
| 7793 | emu->x86.R_AH = (int8_t) mod; |
| 7794 | } |
| 7795 | /**************************************************************************** |
| 7796 | REMARKS: |
| 7797 | Implements the IDIV instruction and side effects. |
| 7798 | ****************************************************************************/ |
| 7799 | static void |
| 7800 | idiv_word(struct X86EMU *emu, uint16_t s) |
| 7801 | { |
| 7802 | int32_t dvd, div, mod; |
| 7803 | |
| 7804 | dvd = (((int32_t) emu->x86.R_DX) << 16) | emu->x86.R_AX; |
| 7805 | if (s == 0) { |
| 7806 | x86emu_intr_raise(emu, 8); |
| 7807 | return; |
| 7808 | } |
| 7809 | div = dvd / (int16_t) s; |
| 7810 | mod = dvd % (int16_t) s; |
| 7811 | if (div > 0x7fff || div < -0x7fff) { |
| 7812 | x86emu_intr_raise(emu, 8); |
| 7813 | return; |
| 7814 | } |
| 7815 | CLEAR_FLAG(F_CF); |
| 7816 | CLEAR_FLAG(F_SF); |
| 7817 | CONDITIONAL_SET_FLAG(div == 0, F_ZF); |
| 7818 | CONDITIONAL_SET_FLAG(PARITY(mod & 0xff), F_PF); |
| 7819 | |
| 7820 | emu->x86.R_AX = (uint16_t) div; |
| 7821 | emu->x86.R_DX = (uint16_t) mod; |
| 7822 | } |
| 7823 | /**************************************************************************** |
| 7824 | REMARKS: |
| 7825 | Implements the IDIV instruction and side effects. |
| 7826 | ****************************************************************************/ |
| 7827 | static void |
| 7828 | idiv_long(struct X86EMU *emu, uint32_t s) |
| 7829 | { |
| 7830 | int64_t dvd, div, mod; |
| 7831 | |
| 7832 | dvd = (((int64_t) emu->x86.R_EDX) << 32) | emu->x86.R_EAX; |
| 7833 | if (s == 0) { |
| 7834 | x86emu_intr_raise(emu, 8); |
| 7835 | return; |
| 7836 | } |
| 7837 | div = dvd / (int32_t) s; |
| 7838 | mod = dvd % (int32_t) s; |
| 7839 | if (div > 0x7fffffff || div < -0x7fffffff) { |
| 7840 | x86emu_intr_raise(emu, 8); |
| 7841 | return; |
| 7842 | } |
| 7843 | CLEAR_FLAG(F_CF); |
| 7844 | CLEAR_FLAG(F_AF); |
| 7845 | CLEAR_FLAG(F_SF); |
| 7846 | SET_FLAG(F_ZF); |
| 7847 | CONDITIONAL_SET_FLAG(PARITY(mod & 0xff), F_PF); |
| 7848 | |
| 7849 | emu->x86.R_EAX = (uint32_t) div; |
| 7850 | emu->x86.R_EDX = (uint32_t) mod; |
| 7851 | } |
| 7852 | /**************************************************************************** |
| 7853 | REMARKS: |
| 7854 | Implements the DIV instruction and side effects. |
| 7855 | ****************************************************************************/ |
| 7856 | static void |
| 7857 | div_byte(struct X86EMU *emu, uint8_t s) |
| 7858 | { |
| 7859 | uint32_t dvd, div, mod; |
| 7860 | |
| 7861 | dvd = emu->x86.R_AX; |
| 7862 | if (s == 0) { |
| 7863 | x86emu_intr_raise(emu, 8); |
| 7864 | return; |
| 7865 | } |
| 7866 | div = dvd / (uint8_t) s; |
| 7867 | mod = dvd % (uint8_t) s; |
| 7868 | if (div > 0xff) { |
| 7869 | x86emu_intr_raise(emu, 8); |
| 7870 | return; |
| 7871 | } |
| 7872 | emu->x86.R_AL = (uint8_t) div; |
| 7873 | emu->x86.R_AH = (uint8_t) mod; |
| 7874 | } |
| 7875 | /**************************************************************************** |
| 7876 | REMARKS: |
| 7877 | Implements the DIV instruction and side effects. |
| 7878 | ****************************************************************************/ |
| 7879 | static void |
| 7880 | div_word(struct X86EMU *emu, uint16_t s) |
| 7881 | { |
| 7882 | uint32_t dvd, div, mod; |
| 7883 | |
| 7884 | dvd = (((uint32_t) emu->x86.R_DX) << 16) | emu->x86.R_AX; |
| 7885 | if (s == 0) { |
| 7886 | x86emu_intr_raise(emu, 8); |
| 7887 | return; |
| 7888 | } |
| 7889 | div = dvd / (uint16_t) s; |
| 7890 | mod = dvd % (uint16_t) s; |
| 7891 | if (div > 0xffff) { |
| 7892 | x86emu_intr_raise(emu, 8); |
| 7893 | return; |
| 7894 | } |
| 7895 | CLEAR_FLAG(F_CF); |
| 7896 | CLEAR_FLAG(F_SF); |
| 7897 | CONDITIONAL_SET_FLAG(div == 0, F_ZF); |
| 7898 | CONDITIONAL_SET_FLAG(PARITY(mod & 0xff), F_PF); |
| 7899 | |
| 7900 | emu->x86.R_AX = (uint16_t) div; |
| 7901 | emu->x86.R_DX = (uint16_t) mod; |
| 7902 | } |
| 7903 | /**************************************************************************** |
| 7904 | REMARKS: |
| 7905 | Implements the DIV instruction and side effects. |
| 7906 | ****************************************************************************/ |
| 7907 | static void |
| 7908 | div_long(struct X86EMU *emu, uint32_t s) |
| 7909 | { |
| 7910 | uint64_t dvd, div, mod; |
| 7911 | |
| 7912 | dvd = (((uint64_t) emu->x86.R_EDX) << 32) | emu->x86.R_EAX; |
| 7913 | if (s == 0) { |
| 7914 | x86emu_intr_raise(emu, 8); |
| 7915 | return; |
| 7916 | } |
| 7917 | div = dvd / (uint32_t) s; |
| 7918 | mod = dvd % (uint32_t) s; |
| 7919 | if (div > 0xffffffff) { |
| 7920 | x86emu_intr_raise(emu, 8); |
| 7921 | return; |
| 7922 | } |
| 7923 | CLEAR_FLAG(F_CF); |
| 7924 | CLEAR_FLAG(F_AF); |
| 7925 | CLEAR_FLAG(F_SF); |
| 7926 | SET_FLAG(F_ZF); |
| 7927 | CONDITIONAL_SET_FLAG(PARITY(mod & 0xff), F_PF); |
| 7928 | |
| 7929 | emu->x86.R_EAX = (uint32_t) div; |
| 7930 | emu->x86.R_EDX = (uint32_t) mod; |
| 7931 | } |
| 7932 | /**************************************************************************** |
| 7933 | REMARKS: |
| 7934 | Implements the IN string instruction and side effects. |
| 7935 | ****************************************************************************/ |
| 7936 | static void |
| 7937 | ins(struct X86EMU *emu, int size) |
| 7938 | { |
| 7939 | int inc = size; |
| 7940 | |
| 7941 | if (ACCESS_FLAG(F_DF)) { |
| 7942 | inc = -size; |
| 7943 | } |
| 7944 | if (emu->x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) { |
| 7945 | /* dont care whether REPE or REPNE */ |
| 7946 | /* in until CX is ZERO. */ |
| 7947 | uint32_t count = ((emu->x86.mode & SYSMODE_PREFIX_DATA) ? |
| 7948 | emu->x86.R_ECX : emu->x86.R_CX); |
| 7949 | switch (size) { |
| 7950 | case 1: |
| 7951 | while (count--) { |
| 7952 | store_byte(emu, emu->x86.R_ES, emu->x86.R_DI, |
| 7953 | (*emu->emu_inb) (emu, emu->x86.R_DX)); |
| 7954 | emu->x86.R_DI += inc; |
| 7955 | } |
| 7956 | break; |
| 7957 | |
| 7958 | case 2: |
| 7959 | while (count--) { |
| 7960 | store_word(emu, emu->x86.R_ES, emu->x86.R_DI, |
| 7961 | (*emu->emu_inw) (emu, emu->x86.R_DX)); |
| 7962 | emu->x86.R_DI += inc; |
| 7963 | } |
| 7964 | break; |
| 7965 | case 4: |
| 7966 | while (count--) { |
| 7967 | store_long(emu, emu->x86.R_ES, emu->x86.R_DI, |
| 7968 | (*emu->emu_inl) (emu, emu->x86.R_DX)); |
| 7969 | emu->x86.R_DI += inc; |
| 7970 | break; |
| 7971 | } |
| 7972 | } |
| 7973 | emu->x86.R_CX = 0; |
| 7974 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 7975 | emu->x86.R_ECX = 0; |
| 7976 | } |
| 7977 | emu->x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE); |
| 7978 | } else { |
| 7979 | switch (size) { |
| 7980 | case 1: |
| 7981 | store_byte(emu, emu->x86.R_ES, emu->x86.R_DI, |
| 7982 | (*emu->emu_inb) (emu, emu->x86.R_DX)); |
| 7983 | break; |
| 7984 | case 2: |
| 7985 | store_word(emu, emu->x86.R_ES, emu->x86.R_DI, |
| 7986 | (*emu->emu_inw) (emu, emu->x86.R_DX)); |
| 7987 | break; |
| 7988 | case 4: |
| 7989 | store_long(emu, emu->x86.R_ES, emu->x86.R_DI, |
| 7990 | (*emu->emu_inl) (emu, emu->x86.R_DX)); |
| 7991 | break; |
| 7992 | } |
| 7993 | emu->x86.R_DI += inc; |
| 7994 | } |
| 7995 | } |
| 7996 | /**************************************************************************** |
| 7997 | REMARKS: |
| 7998 | Implements the OUT string instruction and side effects. |
| 7999 | ****************************************************************************/ |
| 8000 | static void |
| 8001 | outs(struct X86EMU *emu, int size) |
| 8002 | { |
| 8003 | int inc = size; |
| 8004 | |
| 8005 | if (ACCESS_FLAG(F_DF)) { |
| 8006 | inc = -size; |
| 8007 | } |
| 8008 | if (emu->x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) { |
| 8009 | /* dont care whether REPE or REPNE */ |
| 8010 | /* out until CX is ZERO. */ |
| 8011 | uint32_t count = ((emu->x86.mode & SYSMODE_PREFIX_DATA) ? |
| 8012 | emu->x86.R_ECX : emu->x86.R_CX); |
| 8013 | switch (size) { |
| 8014 | case 1: |
| 8015 | while (count--) { |
| 8016 | (*emu->emu_outb) (emu, emu->x86.R_DX, |
| 8017 | fetch_byte(emu, emu->x86.R_ES, emu->x86.R_SI)); |
| 8018 | emu->x86.R_SI += inc; |
| 8019 | } |
| 8020 | break; |
| 8021 | |
| 8022 | case 2: |
| 8023 | while (count--) { |
| 8024 | (*emu->emu_outw) (emu, emu->x86.R_DX, |
| 8025 | fetch_word(emu, emu->x86.R_ES, emu->x86.R_SI)); |
| 8026 | emu->x86.R_SI += inc; |
| 8027 | } |
| 8028 | break; |
| 8029 | case 4: |
| 8030 | while (count--) { |
| 8031 | (*emu->emu_outl) (emu, emu->x86.R_DX, |
| 8032 | fetch_long(emu, emu->x86.R_ES, emu->x86.R_SI)); |
| 8033 | emu->x86.R_SI += inc; |
| 8034 | break; |
| 8035 | } |
| 8036 | } |
| 8037 | emu->x86.R_CX = 0; |
| 8038 | if (emu->x86.mode & SYSMODE_PREFIX_DATA) { |
| 8039 | emu->x86.R_ECX = 0; |
| 8040 | } |
| 8041 | emu->x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE); |
| 8042 | } else { |
| 8043 | switch (size) { |
| 8044 | case 1: |
| 8045 | (*emu->emu_outb) (emu, emu->x86.R_DX, |
| 8046 | fetch_byte(emu, emu->x86.R_ES, emu->x86.R_SI)); |
| 8047 | break; |
| 8048 | case 2: |
| 8049 | (*emu->emu_outw) (emu, emu->x86.R_DX, |
| 8050 | fetch_word(emu, emu->x86.R_ES, emu->x86.R_SI)); |
| 8051 | break; |
| 8052 | case 4: |
| 8053 | (*emu->emu_outl) (emu, emu->x86.R_DX, |
| 8054 | fetch_long(emu, emu->x86.R_ES, emu->x86.R_SI)); |
| 8055 | break; |
| 8056 | } |
| 8057 | emu->x86.R_SI += inc; |
| 8058 | } |
| 8059 | } |
| 8060 | /**************************************************************************** |
| 8061 | REMARKS: |
| 8062 | Pushes a word onto the stack. |
| 8063 | |
| 8064 | NOTE: Do not inline this, as (*emu->emu_wrX) is already inline! |
| 8065 | ****************************************************************************/ |
| 8066 | static void |
| 8067 | push_word(struct X86EMU *emu, uint16_t w) |
| 8068 | { |
| 8069 | emu->x86.R_SP -= 2; |
| 8070 | store_word(emu, emu->x86.R_SS, emu->x86.R_SP, w); |
| 8071 | } |
| 8072 | /**************************************************************************** |
| 8073 | REMARKS: |
| 8074 | Pushes a long onto the stack. |
| 8075 | |
| 8076 | NOTE: Do not inline this, as (*emu->emu_wrX) is already inline! |
| 8077 | ****************************************************************************/ |
| 8078 | static void |
| 8079 | push_long(struct X86EMU *emu, uint32_t w) |
| 8080 | { |
| 8081 | emu->x86.R_SP -= 4; |
| 8082 | store_long(emu, emu->x86.R_SS, emu->x86.R_SP, w); |
| 8083 | } |
| 8084 | /**************************************************************************** |
| 8085 | REMARKS: |
| 8086 | Pops a word from the stack. |
| 8087 | |
| 8088 | NOTE: Do not inline this, as (*emu->emu_rdX) is already inline! |
| 8089 | ****************************************************************************/ |
| 8090 | static uint16_t |
| 8091 | pop_word(struct X86EMU *emu) |
| 8092 | { |
| 8093 | uint16_t res; |
| 8094 | |
| 8095 | res = fetch_word(emu, emu->x86.R_SS, emu->x86.R_SP); |
| 8096 | emu->x86.R_SP += 2; |
| 8097 | return res; |
| 8098 | } |
| 8099 | /**************************************************************************** |
| 8100 | REMARKS: |
| 8101 | Pops a long from the stack. |
| 8102 | |
| 8103 | NOTE: Do not inline this, as (*emu->emu_rdX) is already inline! |
| 8104 | ****************************************************************************/ |
| 8105 | static uint32_t |
| 8106 | pop_long(struct X86EMU *emu) |
| 8107 | { |
| 8108 | uint32_t res; |
| 8109 | |
| 8110 | res = fetch_long(emu, emu->x86.R_SS, emu->x86.R_SP); |
| 8111 | emu->x86.R_SP += 4; |
| 8112 | return res; |
| 8113 | } |
| 8114 | |