| 1 |
/* |
| 2 |
* UAE - The Un*x Amiga Emulator |
| 3 |
* |
| 4 |
* Read 68000 CPU specs from file "table68k" |
| 5 |
* |
| 6 |
* Copyright 1995,1996 Bernd Schmidt |
| 7 |
*/ |
| 8 |
|
| 9 |
#include <stdio.h> |
| 10 |
#include <stdlib.h> |
| 11 |
#include <string.h> |
| 12 |
#include <ctype.h> |
| 13 |
|
| 14 |
#include "sysdeps.h" |
| 15 |
#include "readcpu.h" |
| 16 |
|
| 17 |
int nr_cpuop_funcs; |
| 18 |
|
| 19 |
struct mnemolookup lookuptab[] = { |
| 20 |
{ i_ILLG, "ILLEGAL" }, |
| 21 |
{ i_OR, "OR" }, |
| 22 |
{ i_CHK, "CHK" }, |
| 23 |
{ i_CHK2, "CHK2" }, |
| 24 |
{ i_AND, "AND" }, |
| 25 |
{ i_EOR, "EOR" }, |
| 26 |
{ i_ORSR, "ORSR" }, |
| 27 |
{ i_ANDSR, "ANDSR" }, |
| 28 |
{ i_EORSR, "EORSR" }, |
| 29 |
{ i_SUB, "SUB" }, |
| 30 |
{ i_SUBA, "SUBA" }, |
| 31 |
{ i_SUBX, "SUBX" }, |
| 32 |
{ i_SBCD, "SBCD" }, |
| 33 |
{ i_ADD, "ADD" }, |
| 34 |
{ i_ADDA, "ADDA" }, |
| 35 |
{ i_ADDX, "ADDX" }, |
| 36 |
{ i_ABCD, "ABCD" }, |
| 37 |
{ i_NEG, "NEG" }, |
| 38 |
{ i_NEGX, "NEGX" }, |
| 39 |
{ i_NBCD, "NBCD" }, |
| 40 |
{ i_CLR, "CLR" }, |
| 41 |
{ i_NOT, "NOT" }, |
| 42 |
{ i_TST, "TST" }, |
| 43 |
{ i_BTST, "BTST" }, |
| 44 |
{ i_BCHG, "BCHG" }, |
| 45 |
{ i_BCLR, "BCLR" }, |
| 46 |
{ i_BSET, "BSET" }, |
| 47 |
{ i_CMP, "CMP" }, |
| 48 |
{ i_CMPM, "CMPM" }, |
| 49 |
{ i_CMPA, "CMPA" }, |
| 50 |
{ i_MVPRM, "MVPRM" }, |
| 51 |
{ i_MVPMR, "MVPMR" }, |
| 52 |
{ i_MOVE, "MOVE" }, |
| 53 |
{ i_MOVEA, "MOVEA" }, |
| 54 |
{ i_MVSR2, "MVSR2" }, |
| 55 |
{ i_MV2SR, "MV2SR" }, |
| 56 |
{ i_SWAP, "SWAP" }, |
| 57 |
{ i_EXG, "EXG" }, |
| 58 |
{ i_EXT, "EXT" }, |
| 59 |
{ i_MVMEL, "MVMEL" }, |
| 60 |
{ i_MVMLE, "MVMLE" }, |
| 61 |
{ i_TRAP, "TRAP" }, |
| 62 |
{ i_MVR2USP, "MVR2USP" }, |
| 63 |
{ i_MVUSP2R, "MVUSP2R" }, |
| 64 |
{ i_NOP, "NOP" }, |
| 65 |
{ i_RESET, "RESET" }, |
| 66 |
{ i_RTE, "RTE" }, |
| 67 |
{ i_RTD, "RTD" }, |
| 68 |
{ i_LINK, "LINK" }, |
| 69 |
{ i_UNLK, "UNLK" }, |
| 70 |
{ i_RTS, "RTS" }, |
| 71 |
{ i_STOP, "STOP" }, |
| 72 |
{ i_TRAPV, "TRAPV" }, |
| 73 |
{ i_RTR, "RTR" }, |
| 74 |
{ i_JSR, "JSR" }, |
| 75 |
{ i_JMP, "JMP" }, |
| 76 |
{ i_BSR, "BSR" }, |
| 77 |
{ i_Bcc, "Bcc" }, |
| 78 |
{ i_LEA, "LEA" }, |
| 79 |
{ i_PEA, "PEA" }, |
| 80 |
{ i_DBcc, "DBcc" }, |
| 81 |
{ i_Scc, "Scc" }, |
| 82 |
{ i_DIVU, "DIVU" }, |
| 83 |
{ i_DIVS, "DIVS" }, |
| 84 |
{ i_MULU, "MULU" }, |
| 85 |
{ i_MULS, "MULS" }, |
| 86 |
{ i_ASR, "ASR" }, |
| 87 |
{ i_ASL, "ASL" }, |
| 88 |
{ i_LSR, "LSR" }, |
| 89 |
{ i_LSL, "LSL" }, |
| 90 |
{ i_ROL, "ROL" }, |
| 91 |
{ i_ROR, "ROR" }, |
| 92 |
{ i_ROXL, "ROXL" }, |
| 93 |
{ i_ROXR, "ROXR" }, |
| 94 |
{ i_ASRW, "ASRW" }, |
| 95 |
{ i_ASLW, "ASLW" }, |
| 96 |
{ i_LSRW, "LSRW" }, |
| 97 |
{ i_LSLW, "LSLW" }, |
| 98 |
{ i_ROLW, "ROLW" }, |
| 99 |
{ i_RORW, "RORW" }, |
| 100 |
{ i_ROXLW, "ROXLW" }, |
| 101 |
{ i_ROXRW, "ROXRW" }, |
| 102 |
|
| 103 |
{ i_MOVE2C, "MOVE2C" }, |
| 104 |
{ i_MOVEC2, "MOVEC2" }, |
| 105 |
{ i_CAS, "CAS" }, |
| 106 |
{ i_CAS2, "CAS2" }, |
| 107 |
{ i_MULL, "MULL" }, |
| 108 |
{ i_DIVL, "DIVL" }, |
| 109 |
{ i_BFTST, "BFTST" }, |
| 110 |
{ i_BFEXTU, "BFEXTU" }, |
| 111 |
{ i_BFCHG, "BFCHG" }, |
| 112 |
{ i_BFEXTS, "BFEXTS" }, |
| 113 |
{ i_BFCLR, "BFCLR" }, |
| 114 |
{ i_BFFFO, "BFFFO" }, |
| 115 |
{ i_BFSET, "BFSET" }, |
| 116 |
{ i_BFINS, "BFINS" }, |
| 117 |
{ i_PACK, "PACK" }, |
| 118 |
{ i_UNPK, "UNPK" }, |
| 119 |
{ i_TAS, "TAS" }, |
| 120 |
{ i_BKPT, "BKPT" }, |
| 121 |
{ i_CALLM, "CALLM" }, |
| 122 |
{ i_RTM, "RTM" }, |
| 123 |
{ i_TRAPcc, "TRAPcc" }, |
| 124 |
{ i_MOVES, "MOVES" }, |
| 125 |
{ i_FPP, "FPP" }, |
| 126 |
{ i_FDBcc, "FDBcc" }, |
| 127 |
{ i_FScc, "FScc" }, |
| 128 |
{ i_FTRAPcc, "FTRAPcc" }, |
| 129 |
{ i_FBcc, "FBcc" }, |
| 130 |
{ i_FBcc, "FBcc" }, |
| 131 |
{ i_FSAVE, "FSAVE" }, |
| 132 |
{ i_FRESTORE, "FRESTORE" }, |
| 133 |
{ i_MMUOP, "MMUOP" }, |
| 134 |
{ i_ILLG, "" }, |
| 135 |
}; |
| 136 |
|
| 137 |
struct instr *table68k; |
| 138 |
|
| 139 |
static __inline__ amodes mode_from_str (const char *str) |
| 140 |
{ |
| 141 |
if (strncmp (str, "Dreg", 4) == 0) return Dreg; |
| 142 |
if (strncmp (str, "Areg", 4) == 0) return Areg; |
| 143 |
if (strncmp (str, "Aind", 4) == 0) return Aind; |
| 144 |
if (strncmp (str, "Apdi", 4) == 0) return Apdi; |
| 145 |
if (strncmp (str, "Aipi", 4) == 0) return Aipi; |
| 146 |
if (strncmp (str, "Ad16", 4) == 0) return Ad16; |
| 147 |
if (strncmp (str, "Ad8r", 4) == 0) return Ad8r; |
| 148 |
if (strncmp (str, "absw", 4) == 0) return absw; |
| 149 |
if (strncmp (str, "absl", 4) == 0) return absl; |
| 150 |
if (strncmp (str, "PC16", 4) == 0) return PC16; |
| 151 |
if (strncmp (str, "PC8r", 4) == 0) return PC8r; |
| 152 |
if (strncmp (str, "Immd", 4) == 0) return imm; |
| 153 |
abort (); |
| 154 |
return (amodes)0; |
| 155 |
} |
| 156 |
|
| 157 |
static __inline__ amodes mode_from_mr (int mode, int reg) |
| 158 |
{ |
| 159 |
switch (mode) { |
| 160 |
case 0: return Dreg; |
| 161 |
case 1: return Areg; |
| 162 |
case 2: return Aind; |
| 163 |
case 3: return Aipi; |
| 164 |
case 4: return Apdi; |
| 165 |
case 5: return Ad16; |
| 166 |
case 6: return Ad8r; |
| 167 |
case 7: |
| 168 |
switch (reg) { |
| 169 |
case 0: return absw; |
| 170 |
case 1: return absl; |
| 171 |
case 2: return PC16; |
| 172 |
case 3: return PC8r; |
| 173 |
case 4: return imm; |
| 174 |
case 5: |
| 175 |
case 6: |
| 176 |
case 7: return am_illg; |
| 177 |
} |
| 178 |
} |
| 179 |
abort (); |
| 180 |
return (amodes)0; |
| 181 |
} |
| 182 |
|
| 183 |
static void build_insn (int insn) |
| 184 |
{ |
| 185 |
int find = -1; |
| 186 |
int variants; |
| 187 |
struct instr_def id; |
| 188 |
const char *opcstr; |
| 189 |
int i; |
| 190 |
|
| 191 |
int flaglive = 0, flagdead = 0; |
| 192 |
|
| 193 |
id = defs68k[insn]; |
| 194 |
|
| 195 |
for (i = 0; i < 5; i++) { |
| 196 |
switch (id.flaginfo[i].flagset){ |
| 197 |
case fa_unset: break; |
| 198 |
case fa_isjmp: break; |
| 199 |
case fa_zero: flagdead |= 1 << i; break; |
| 200 |
case fa_one: flagdead |= 1 << i; break; |
| 201 |
case fa_dontcare: flagdead |= 1 << i; break; |
| 202 |
case fa_unknown: flagdead = -1; goto out1; |
| 203 |
case fa_set: flagdead |= 1 << i; break; |
| 204 |
} |
| 205 |
} |
| 206 |
|
| 207 |
out1: |
| 208 |
for (i = 0; i < 5; i++) { |
| 209 |
switch (id.flaginfo[i].flaguse) { |
| 210 |
case fu_unused: break; |
| 211 |
case fu_isjmp: flaglive |= 1 << i; break; |
| 212 |
case fu_maybecc: flaglive |= 1 << i; break; |
| 213 |
case fu_unknown: flaglive = -1; goto out2; |
| 214 |
case fu_used: flaglive |= 1 << i; break; |
| 215 |
} |
| 216 |
} |
| 217 |
out2: |
| 218 |
|
| 219 |
opcstr = id.opcstr; |
| 220 |
for (variants = 0; variants < (1 << id.n_variable); variants++) { |
| 221 |
int bitcnt[lastbit]; |
| 222 |
int bitval[lastbit]; |
| 223 |
int bitpos[lastbit]; |
| 224 |
int i; |
| 225 |
uae_u16 opc = id.bits; |
| 226 |
uae_u16 msk, vmsk; |
| 227 |
int pos = 0; |
| 228 |
int mnp = 0; |
| 229 |
int bitno = 0; |
| 230 |
char mnemonic[10]; |
| 231 |
|
| 232 |
wordsizes sz = sz_long; |
| 233 |
int srcgather = 0, dstgather = 0; |
| 234 |
int usesrc = 0, usedst = 0; |
| 235 |
int srctype = 0; |
| 236 |
int srcpos = -1, dstpos = -1; |
| 237 |
|
| 238 |
amodes srcmode = am_unknown, destmode = am_unknown; |
| 239 |
int srcreg = -1, destreg = -1; |
| 240 |
|
| 241 |
for (i = 0; i < lastbit; i++) |
| 242 |
bitcnt[i] = bitval[i] = 0; |
| 243 |
|
| 244 |
vmsk = 1 << id.n_variable; |
| 245 |
|
| 246 |
for (i = 0, msk = 0x8000; i < 16; i++, msk >>= 1) { |
| 247 |
if (!(msk & id.mask)) { |
| 248 |
int currbit = id.bitpos[bitno++]; |
| 249 |
int bit_set; |
| 250 |
vmsk >>= 1; |
| 251 |
bit_set = variants & vmsk ? 1 : 0; |
| 252 |
if (bit_set) |
| 253 |
opc |= msk; |
| 254 |
bitpos[currbit] = 15 - i; |
| 255 |
bitcnt[currbit]++; |
| 256 |
bitval[currbit] <<= 1; |
| 257 |
bitval[currbit] |= bit_set; |
| 258 |
} |
| 259 |
} |
| 260 |
|
| 261 |
if (bitval[bitj] == 0) bitval[bitj] = 8; |
| 262 |
/* first check whether this one does not match after all */ |
| 263 |
if (bitval[bitz] == 3 || bitval[bitC] == 1) |
| 264 |
continue; |
| 265 |
if (bitcnt[bitI] && (bitval[bitI] == 0x00 || bitval[bitI] == 0xff)) |
| 266 |
continue; |
| 267 |
|
| 268 |
/* bitI and bitC get copied to biti and bitc */ |
| 269 |
if (bitcnt[bitI]) { |
| 270 |
bitval[biti] = bitval[bitI]; bitpos[biti] = bitpos[bitI]; |
| 271 |
} |
| 272 |
if (bitcnt[bitC]) |
| 273 |
bitval[bitc] = bitval[bitC]; |
| 274 |
|
| 275 |
pos = 0; |
| 276 |
while (opcstr[pos] && !isspace(opcstr[pos])) { |
| 277 |
if (opcstr[pos] == '.') { |
| 278 |
pos++; |
| 279 |
switch (opcstr[pos]) { |
| 280 |
|
| 281 |
case 'B': sz = sz_byte; break; |
| 282 |
case 'W': sz = sz_word; break; |
| 283 |
case 'L': sz = sz_long; break; |
| 284 |
case 'z': |
| 285 |
switch (bitval[bitz]) { |
| 286 |
case 0: sz = sz_byte; break; |
| 287 |
case 1: sz = sz_word; break; |
| 288 |
case 2: sz = sz_long; break; |
| 289 |
default: abort(); |
| 290 |
} |
| 291 |
break; |
| 292 |
default: abort(); |
| 293 |
} |
| 294 |
} else { |
| 295 |
mnemonic[mnp] = opcstr[pos]; |
| 296 |
if (mnemonic[mnp] == 'f') { |
| 297 |
find = -1; |
| 298 |
switch (bitval[bitf]) { |
| 299 |
case 0: mnemonic[mnp] = 'R'; break; |
| 300 |
case 1: mnemonic[mnp] = 'L'; break; |
| 301 |
default: abort(); |
| 302 |
} |
| 303 |
} |
| 304 |
mnp++; |
| 305 |
} |
| 306 |
pos++; |
| 307 |
} |
| 308 |
mnemonic[mnp] = 0; |
| 309 |
|
| 310 |
/* now, we have read the mnemonic and the size */ |
| 311 |
while (opcstr[pos] && isspace(opcstr[pos])) |
| 312 |
pos++; |
| 313 |
|
| 314 |
/* A goto a day keeps the D******a away. */ |
| 315 |
if (opcstr[pos] == 0) |
| 316 |
goto endofline; |
| 317 |
|
| 318 |
/* parse the source address */ |
| 319 |
usesrc = 1; |
| 320 |
switch (opcstr[pos++]) { |
| 321 |
case 'D': |
| 322 |
srcmode = Dreg; |
| 323 |
switch (opcstr[pos++]) { |
| 324 |
case 'r': srcreg = bitval[bitr]; srcgather = 1; srcpos = bitpos[bitr]; break; |
| 325 |
case 'R': srcreg = bitval[bitR]; srcgather = 1; srcpos = bitpos[bitR]; break; |
| 326 |
default: abort(); |
| 327 |
} |
| 328 |
|
| 329 |
break; |
| 330 |
case 'A': |
| 331 |
srcmode = Areg; |
| 332 |
switch (opcstr[pos++]) { |
| 333 |
case 'r': srcreg = bitval[bitr]; srcgather = 1; srcpos = bitpos[bitr]; break; |
| 334 |
case 'R': srcreg = bitval[bitR]; srcgather = 1; srcpos = bitpos[bitR]; break; |
| 335 |
default: abort(); |
| 336 |
} |
| 337 |
switch (opcstr[pos]) { |
| 338 |
case 'p': srcmode = Apdi; pos++; break; |
| 339 |
case 'P': srcmode = Aipi; pos++; break; |
| 340 |
} |
| 341 |
break; |
| 342 |
case '#': |
| 343 |
switch (opcstr[pos++]) { |
| 344 |
case 'z': srcmode = imm; break; |
| 345 |
case '0': srcmode = imm0; break; |
| 346 |
case '1': srcmode = imm1; break; |
| 347 |
case '2': srcmode = imm2; break; |
| 348 |
case 'i': srcmode = immi; srcreg = (uae_s32)(uae_s8)bitval[biti]; |
| 349 |
if (CPU_EMU_SIZE < 4) { |
| 350 |
/* Used for branch instructions */ |
| 351 |
srctype = 1; |
| 352 |
srcgather = 1; |
| 353 |
srcpos = bitpos[biti]; |
| 354 |
} |
| 355 |
break; |
| 356 |
case 'j': srcmode = immi; srcreg = bitval[bitj]; |
| 357 |
if (CPU_EMU_SIZE < 3) { |
| 358 |
/* 1..8 for ADDQ/SUBQ and rotshi insns */ |
| 359 |
srcgather = 1; |
| 360 |
srctype = 3; |
| 361 |
srcpos = bitpos[bitj]; |
| 362 |
} |
| 363 |
break; |
| 364 |
case 'J': srcmode = immi; srcreg = bitval[bitJ]; |
| 365 |
if (CPU_EMU_SIZE < 5) { |
| 366 |
/* 0..15 */ |
| 367 |
srcgather = 1; |
| 368 |
srctype = 2; |
| 369 |
srcpos = bitpos[bitJ]; |
| 370 |
} |
| 371 |
break; |
| 372 |
case 'k': srcmode = immi; srcreg = bitval[bitk]; |
| 373 |
if (CPU_EMU_SIZE < 3) { |
| 374 |
srcgather = 1; |
| 375 |
srctype = 4; |
| 376 |
srcpos = bitpos[bitk]; |
| 377 |
} |
| 378 |
break; |
| 379 |
case 'K': srcmode = immi; srcreg = bitval[bitK]; |
| 380 |
if (CPU_EMU_SIZE < 5) { |
| 381 |
/* 0..15 */ |
| 382 |
srcgather = 1; |
| 383 |
srctype = 5; |
| 384 |
srcpos = bitpos[bitK]; |
| 385 |
} |
| 386 |
break; |
| 387 |
default: abort(); |
| 388 |
} |
| 389 |
break; |
| 390 |
case 'd': |
| 391 |
srcreg = bitval[bitD]; |
| 392 |
srcmode = mode_from_mr(bitval[bitd],bitval[bitD]); |
| 393 |
if (srcmode == am_illg) |
| 394 |
continue; |
| 395 |
if (CPU_EMU_SIZE < 2 && |
| 396 |
(srcmode == Areg || srcmode == Dreg || srcmode == Aind |
| 397 |
|| srcmode == Ad16 || srcmode == Ad8r || srcmode == Aipi |
| 398 |
|| srcmode == Apdi)) |
| 399 |
{ |
| 400 |
srcgather = 1; srcpos = bitpos[bitD]; |
| 401 |
} |
| 402 |
if (opcstr[pos] == '[') { |
| 403 |
pos++; |
| 404 |
if (opcstr[pos] == '!') { |
| 405 |
/* exclusion */ |
| 406 |
do { |
| 407 |
pos++; |
| 408 |
if (mode_from_str(opcstr+pos) == srcmode) |
| 409 |
goto nomatch; |
| 410 |
pos += 4; |
| 411 |
} while (opcstr[pos] == ','); |
| 412 |
pos++; |
| 413 |
} else { |
| 414 |
if (opcstr[pos+4] == '-') { |
| 415 |
/* replacement */ |
| 416 |
if (mode_from_str(opcstr+pos) == srcmode) |
| 417 |
srcmode = mode_from_str(opcstr+pos+5); |
| 418 |
else |
| 419 |
goto nomatch; |
| 420 |
pos += 10; |
| 421 |
} else { |
| 422 |
/* normal */ |
| 423 |
while(mode_from_str(opcstr+pos) != srcmode) { |
| 424 |
pos += 4; |
| 425 |
if (opcstr[pos] == ']') |
| 426 |
goto nomatch; |
| 427 |
pos++; |
| 428 |
} |
| 429 |
while(opcstr[pos] != ']') pos++; |
| 430 |
pos++; |
| 431 |
break; |
| 432 |
} |
| 433 |
} |
| 434 |
} |
| 435 |
/* Some addressing modes are invalid as destination */ |
| 436 |
if (srcmode == imm || srcmode == PC16 || srcmode == PC8r) |
| 437 |
goto nomatch; |
| 438 |
break; |
| 439 |
case 's': |
| 440 |
srcreg = bitval[bitS]; |
| 441 |
srcmode = mode_from_mr(bitval[bits],bitval[bitS]); |
| 442 |
|
| 443 |
if (srcmode == am_illg) |
| 444 |
continue; |
| 445 |
if (CPU_EMU_SIZE < 2 && |
| 446 |
(srcmode == Areg || srcmode == Dreg || srcmode == Aind |
| 447 |
|| srcmode == Ad16 || srcmode == Ad8r || srcmode == Aipi |
| 448 |
|| srcmode == Apdi)) |
| 449 |
{ |
| 450 |
srcgather = 1; srcpos = bitpos[bitS]; |
| 451 |
} |
| 452 |
if (opcstr[pos] == '[') { |
| 453 |
pos++; |
| 454 |
if (opcstr[pos] == '!') { |
| 455 |
/* exclusion */ |
| 456 |
do { |
| 457 |
pos++; |
| 458 |
if (mode_from_str(opcstr+pos) == srcmode) |
| 459 |
goto nomatch; |
| 460 |
pos += 4; |
| 461 |
} while (opcstr[pos] == ','); |
| 462 |
pos++; |
| 463 |
} else { |
| 464 |
if (opcstr[pos+4] == '-') { |
| 465 |
/* replacement */ |
| 466 |
if (mode_from_str(opcstr+pos) == srcmode) |
| 467 |
srcmode = mode_from_str(opcstr+pos+5); |
| 468 |
else |
| 469 |
goto nomatch; |
| 470 |
pos += 10; |
| 471 |
} else { |
| 472 |
/* normal */ |
| 473 |
while(mode_from_str(opcstr+pos) != srcmode) { |
| 474 |
pos += 4; |
| 475 |
if (opcstr[pos] == ']') |
| 476 |
goto nomatch; |
| 477 |
pos++; |
| 478 |
} |
| 479 |
while(opcstr[pos] != ']') pos++; |
| 480 |
pos++; |
| 481 |
} |
| 482 |
} |
| 483 |
} |
| 484 |
break; |
| 485 |
default: abort(); |
| 486 |
} |
| 487 |
/* safety check - might have changed */ |
| 488 |
if (srcmode != Areg && srcmode != Dreg && srcmode != Aind |
| 489 |
&& srcmode != Ad16 && srcmode != Ad8r && srcmode != Aipi |
| 490 |
&& srcmode != Apdi && srcmode != immi) |
| 491 |
{ |
| 492 |
srcgather = 0; |
| 493 |
} |
| 494 |
if (srcmode == Areg && sz == sz_byte) |
| 495 |
goto nomatch; |
| 496 |
|
| 497 |
if (opcstr[pos] != ',') |
| 498 |
goto endofline; |
| 499 |
pos++; |
| 500 |
|
| 501 |
/* parse the destination address */ |
| 502 |
usedst = 1; |
| 503 |
switch (opcstr[pos++]) { |
| 504 |
case 'D': |
| 505 |
destmode = Dreg; |
| 506 |
switch (opcstr[pos++]) { |
| 507 |
case 'r': destreg = bitval[bitr]; dstgather = 1; dstpos = bitpos[bitr]; break; |
| 508 |
case 'R': destreg = bitval[bitR]; dstgather = 1; dstpos = bitpos[bitR]; break; |
| 509 |
default: abort(); |
| 510 |
} |
| 511 |
break; |
| 512 |
case 'A': |
| 513 |
destmode = Areg; |
| 514 |
switch (opcstr[pos++]) { |
| 515 |
case 'r': destreg = bitval[bitr]; dstgather = 1; dstpos = bitpos[bitr]; break; |
| 516 |
case 'R': destreg = bitval[bitR]; dstgather = 1; dstpos = bitpos[bitR]; break; |
| 517 |
default: abort(); |
| 518 |
} |
| 519 |
switch (opcstr[pos]) { |
| 520 |
case 'p': destmode = Apdi; pos++; break; |
| 521 |
case 'P': destmode = Aipi; pos++; break; |
| 522 |
} |
| 523 |
break; |
| 524 |
case '#': |
| 525 |
switch (opcstr[pos++]) { |
| 526 |
case 'z': destmode = imm; break; |
| 527 |
case '0': destmode = imm0; break; |
| 528 |
case '1': destmode = imm1; break; |
| 529 |
case '2': destmode = imm2; break; |
| 530 |
case 'i': destmode = immi; destreg = (uae_s32)(uae_s8)bitval[biti]; break; |
| 531 |
case 'j': destmode = immi; destreg = bitval[bitj]; break; |
| 532 |
case 'J': destmode = immi; destreg = bitval[bitJ]; break; |
| 533 |
case 'k': destmode = immi; destreg = bitval[bitk]; break; |
| 534 |
case 'K': destmode = immi; destreg = bitval[bitK]; break; |
| 535 |
default: abort(); |
| 536 |
} |
| 537 |
break; |
| 538 |
case 'd': |
| 539 |
destreg = bitval[bitD]; |
| 540 |
destmode = mode_from_mr(bitval[bitd],bitval[bitD]); |
| 541 |
if (destmode == am_illg) |
| 542 |
continue; |
| 543 |
if (CPU_EMU_SIZE < 1 && |
| 544 |
(destmode == Areg || destmode == Dreg || destmode == Aind |
| 545 |
|| destmode == Ad16 || destmode == Ad8r || destmode == Aipi |
| 546 |
|| destmode == Apdi)) |
| 547 |
{ |
| 548 |
dstgather = 1; dstpos = bitpos[bitD]; |
| 549 |
} |
| 550 |
|
| 551 |
if (opcstr[pos] == '[') { |
| 552 |
pos++; |
| 553 |
if (opcstr[pos] == '!') { |
| 554 |
/* exclusion */ |
| 555 |
do { |
| 556 |
pos++; |
| 557 |
if (mode_from_str(opcstr+pos) == destmode) |
| 558 |
goto nomatch; |
| 559 |
pos += 4; |
| 560 |
} while (opcstr[pos] == ','); |
| 561 |
pos++; |
| 562 |
} else { |
| 563 |
if (opcstr[pos+4] == '-') { |
| 564 |
/* replacement */ |
| 565 |
if (mode_from_str(opcstr+pos) == destmode) |
| 566 |
destmode = mode_from_str(opcstr+pos+5); |
| 567 |
else |
| 568 |
goto nomatch; |
| 569 |
pos += 10; |
| 570 |
} else { |
| 571 |
/* normal */ |
| 572 |
while(mode_from_str(opcstr+pos) != destmode) { |
| 573 |
pos += 4; |
| 574 |
if (opcstr[pos] == ']') |
| 575 |
goto nomatch; |
| 576 |
pos++; |
| 577 |
} |
| 578 |
while(opcstr[pos] != ']') pos++; |
| 579 |
pos++; |
| 580 |
break; |
| 581 |
} |
| 582 |
} |
| 583 |
} |
| 584 |
/* Some addressing modes are invalid as destination */ |
| 585 |
if (destmode == imm || destmode == PC16 || destmode == PC8r) |
| 586 |
goto nomatch; |
| 587 |
break; |
| 588 |
case 's': |
| 589 |
destreg = bitval[bitS]; |
| 590 |
destmode = mode_from_mr(bitval[bits],bitval[bitS]); |
| 591 |
|
| 592 |
if (destmode == am_illg) |
| 593 |
continue; |
| 594 |
if (CPU_EMU_SIZE < 1 && |
| 595 |
(destmode == Areg || destmode == Dreg || destmode == Aind |
| 596 |
|| destmode == Ad16 || destmode == Ad8r || destmode == Aipi |
| 597 |
|| destmode == Apdi)) |
| 598 |
{ |
| 599 |
dstgather = 1; dstpos = bitpos[bitS]; |
| 600 |
} |
| 601 |
|
| 602 |
if (opcstr[pos] == '[') { |
| 603 |
pos++; |
| 604 |
if (opcstr[pos] == '!') { |
| 605 |
/* exclusion */ |
| 606 |
do { |
| 607 |
pos++; |
| 608 |
if (mode_from_str(opcstr+pos) == destmode) |
| 609 |
goto nomatch; |
| 610 |
pos += 4; |
| 611 |
} while (opcstr[pos] == ','); |
| 612 |
pos++; |
| 613 |
} else { |
| 614 |
if (opcstr[pos+4] == '-') { |
| 615 |
/* replacement */ |
| 616 |
if (mode_from_str(opcstr+pos) == destmode) |
| 617 |
destmode = mode_from_str(opcstr+pos+5); |
| 618 |
else |
| 619 |
goto nomatch; |
| 620 |
pos += 10; |
| 621 |
} else { |
| 622 |
/* normal */ |
| 623 |
while(mode_from_str(opcstr+pos) != destmode) { |
| 624 |
pos += 4; |
| 625 |
if (opcstr[pos] == ']') |
| 626 |
goto nomatch; |
| 627 |
pos++; |
| 628 |
} |
| 629 |
while(opcstr[pos] != ']') pos++; |
| 630 |
pos++; |
| 631 |
} |
| 632 |
} |
| 633 |
} |
| 634 |
break; |
| 635 |
default: abort(); |
| 636 |
} |
| 637 |
/* safety check - might have changed */ |
| 638 |
if (destmode != Areg && destmode != Dreg && destmode != Aind |
| 639 |
&& destmode != Ad16 && destmode != Ad8r && destmode != Aipi |
| 640 |
&& destmode != Apdi) |
| 641 |
{ |
| 642 |
dstgather = 0; |
| 643 |
} |
| 644 |
|
| 645 |
if (destmode == Areg && sz == sz_byte) |
| 646 |
goto nomatch; |
| 647 |
#if 0 |
| 648 |
if (sz == sz_byte && (destmode == Aipi || destmode == Apdi)) { |
| 649 |
dstgather = 0; |
| 650 |
} |
| 651 |
#endif |
| 652 |
endofline: |
| 653 |
/* now, we have a match */ |
| 654 |
if (table68k[opc].mnemo != i_ILLG) |
| 655 |
fprintf(stderr, "Double match: %x: %s\n", opc, opcstr); |
| 656 |
if (find == -1) { |
| 657 |
for (find = 0;; find++) { |
| 658 |
if (strcmp(mnemonic, lookuptab[find].name) == 0) { |
| 659 |
table68k[opc].mnemo = lookuptab[find].mnemo; |
| 660 |
break; |
| 661 |
} |
| 662 |
if (strlen(lookuptab[find].name) == 0) abort(); |
| 663 |
} |
| 664 |
} |
| 665 |
else { |
| 666 |
table68k[opc].mnemo = lookuptab[find].mnemo; |
| 667 |
} |
| 668 |
table68k[opc].cc = bitval[bitc]; |
| 669 |
if (table68k[opc].mnemo == i_BTST |
| 670 |
|| table68k[opc].mnemo == i_BSET |
| 671 |
|| table68k[opc].mnemo == i_BCLR |
| 672 |
|| table68k[opc].mnemo == i_BCHG) |
| 673 |
{ |
| 674 |
sz = destmode == Dreg ? sz_long : sz_byte; |
| 675 |
} |
| 676 |
table68k[opc].size = sz; |
| 677 |
table68k[opc].sreg = srcreg; |
| 678 |
table68k[opc].dreg = destreg; |
| 679 |
table68k[opc].smode = srcmode; |
| 680 |
table68k[opc].dmode = destmode; |
| 681 |
table68k[opc].spos = srcgather ? srcpos : -1; |
| 682 |
table68k[opc].dpos = dstgather ? dstpos : -1; |
| 683 |
table68k[opc].suse = usesrc; |
| 684 |
table68k[opc].duse = usedst; |
| 685 |
table68k[opc].stype = srctype; |
| 686 |
table68k[opc].plev = id.plevel; |
| 687 |
table68k[opc].clev = id.cpulevel; |
| 688 |
#if 0 |
| 689 |
for (i = 0; i < 5; i++) { |
| 690 |
table68k[opc].flaginfo[i].flagset = id.flaginfo[i].flagset; |
| 691 |
table68k[opc].flaginfo[i].flaguse = id.flaginfo[i].flaguse; |
| 692 |
} |
| 693 |
#endif |
| 694 |
table68k[opc].flagdead = flagdead; |
| 695 |
table68k[opc].flaglive = flaglive; |
| 696 |
nomatch: |
| 697 |
/* FOO! */; |
| 698 |
} |
| 699 |
} |
| 700 |
|
| 701 |
|
| 702 |
void read_table68k (void) |
| 703 |
{ |
| 704 |
int i; |
| 705 |
|
| 706 |
table68k = (struct instr *)malloc (65536 * sizeof (struct instr)); |
| 707 |
for (i = 0; i < 65536; i++) { |
| 708 |
table68k[i].mnemo = i_ILLG; |
| 709 |
table68k[i].handler = -1; |
| 710 |
} |
| 711 |
for (i = 0; i < n_defs68k; i++) { |
| 712 |
build_insn (i); |
| 713 |
} |
| 714 |
} |
| 715 |
|
| 716 |
static int mismatch; |
| 717 |
|
| 718 |
static void handle_merges (long int opcode) |
| 719 |
{ |
| 720 |
uae_u16 smsk; |
| 721 |
uae_u16 dmsk; |
| 722 |
int sbitdst, dstend; |
| 723 |
int srcreg, dstreg; |
| 724 |
|
| 725 |
if (table68k[opcode].spos == -1) { |
| 726 |
sbitdst = 1; smsk = 0; |
| 727 |
} else { |
| 728 |
switch (table68k[opcode].stype) { |
| 729 |
case 0: |
| 730 |
smsk = 7; sbitdst = 8; break; |
| 731 |
case 1: |
| 732 |
smsk = 255; sbitdst = 256; break; |
| 733 |
case 2: |
| 734 |
smsk = 15; sbitdst = 16; break; |
| 735 |
case 3: |
| 736 |
smsk = 7; sbitdst = 8; break; |
| 737 |
case 4: |
| 738 |
smsk = 7; sbitdst = 8; break; |
| 739 |
case 5: |
| 740 |
smsk = 63; sbitdst = 64; break; |
| 741 |
default: |
| 742 |
smsk = 0; sbitdst = 0; |
| 743 |
abort(); |
| 744 |
break; |
| 745 |
} |
| 746 |
smsk <<= table68k[opcode].spos; |
| 747 |
} |
| 748 |
if (table68k[opcode].dpos == -1) { |
| 749 |
dstend = 1; dmsk = 0; |
| 750 |
} else { |
| 751 |
dmsk = 7 << table68k[opcode].dpos; |
| 752 |
dstend = 8; |
| 753 |
} |
| 754 |
for (srcreg=0; srcreg < sbitdst; srcreg++) { |
| 755 |
for (dstreg=0; dstreg < dstend; dstreg++) { |
| 756 |
uae_u16 code = opcode; |
| 757 |
|
| 758 |
code = (code & ~smsk) | (srcreg << table68k[opcode].spos); |
| 759 |
code = (code & ~dmsk) | (dstreg << table68k[opcode].dpos); |
| 760 |
|
| 761 |
/* Check whether this is in fact the same instruction. |
| 762 |
* The instructions should never differ, except for the |
| 763 |
* Bcc.(BW) case. */ |
| 764 |
if (table68k[code].mnemo != table68k[opcode].mnemo |
| 765 |
|| table68k[code].size != table68k[opcode].size |
| 766 |
|| table68k[code].suse != table68k[opcode].suse |
| 767 |
|| table68k[code].duse != table68k[opcode].duse) |
| 768 |
{ |
| 769 |
mismatch++; continue; |
| 770 |
} |
| 771 |
if (table68k[opcode].suse |
| 772 |
&& (table68k[opcode].spos != table68k[code].spos |
| 773 |
|| table68k[opcode].smode != table68k[code].smode |
| 774 |
|| table68k[opcode].stype != table68k[code].stype)) |
| 775 |
{ |
| 776 |
mismatch++; continue; |
| 777 |
} |
| 778 |
if (table68k[opcode].duse |
| 779 |
&& (table68k[opcode].dpos != table68k[code].dpos |
| 780 |
|| table68k[opcode].dmode != table68k[code].dmode)) |
| 781 |
{ |
| 782 |
mismatch++; continue; |
| 783 |
} |
| 784 |
|
| 785 |
if (code != opcode) |
| 786 |
table68k[code].handler = opcode; |
| 787 |
} |
| 788 |
} |
| 789 |
} |
| 790 |
|
| 791 |
void do_merges (void) |
| 792 |
{ |
| 793 |
long int opcode; |
| 794 |
int nr = 0; |
| 795 |
mismatch = 0; |
| 796 |
for (opcode = 0; opcode < 65536; opcode++) { |
| 797 |
if (table68k[opcode].handler != -1 || table68k[opcode].mnemo == i_ILLG) |
| 798 |
continue; |
| 799 |
nr++; |
| 800 |
handle_merges (opcode); |
| 801 |
} |
| 802 |
nr_cpuop_funcs = nr; |
| 803 |
} |
| 804 |
|
| 805 |
int get_no_mismatches (void) |
| 806 |
{ |
| 807 |
return mismatch; |
| 808 |
} |
