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