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1.1.1.3 ! root 1: /* 1.1 root 2: * UAE - The Un*x Amiga Emulator 1.1.1.3 ! root 3: * 1.1 root 4: * MC68000 emulation 5: * 6: * (c) 1995 Bernd Schmidt 7: */ 8: 9: #include "sysconfig.h" 10: #include "sysdeps.h" 11: 12: #include "config.h" 13: #include "options.h" 1.1.1.3 ! root 14: #include "gensound.h" ! 15: #include "sounddep/sound.h" 1.1 root 16: #include "events.h" 1.1.1.3 ! root 17: #include "uae.h" ! 18: #include "machdep/m68k.h" 1.1 root 19: #include "memory.h" 20: #include "custom.h" 1.1.1.2 root 21: #include "readcpu.h" 1.1 root 22: #include "newcpu.h" 23: #include "autoconf.h" 24: #include "ersatz.h" 25: #include "debug.h" 26: #include "compiler.h" 1.1.1.3 ! root 27: #include "gui.h" ! 28: ! 29: /* Opcode of faulting instruction */ ! 30: uae_u16 last_op_for_exception_3; ! 31: /* PC at fault time */ ! 32: uaecptr last_addr_for_exception_3; ! 33: /* Address that generated the exception */ ! 34: uaecptr last_fault_for_exception_3; 1.1 root 35: 36: int areg_byteinc[] = { 1,1,1,1,1,1,1,2 }; 37: int imm8_table[] = { 8,1,2,3,4,5,6,7 }; 38: 39: int movem_index1[256]; 40: int movem_index2[256]; 41: int movem_next[256]; 42: 43: int fpp_movem_index1[256]; 44: int fpp_movem_index2[256]; 45: int fpp_movem_next[256]; 46: 47: cpuop_func *cpufunctbl[65536]; 48: 1.1.1.3 ! root 49: #define COUNT_INSTRS 0 1.1 root 50: 51: #if COUNT_INSTRS 52: static unsigned long int instrcount[65536]; 1.1.1.3 ! root 53: static uae_u16 opcodenums[65536]; 1.1 root 54: 55: static int compfn(const void *el1, const void *el2) 56: { 1.1.1.3 ! root 57: return instrcount[*(const uae_u16 *)el1] < instrcount[*(const uae_u16 *)el2]; ! 58: } ! 59: ! 60: static char *icountfilename (void) ! 61: { ! 62: char *name = getenv ("INSNCOUNT"); ! 63: if (name) ! 64: return name; ! 65: return COUNT_INSTRS == 2 ? "frequent.68k" : "insncount"; 1.1 root 66: } 67: 68: void dump_counts(void) 69: { 1.1.1.3 ! root 70: FILE *f = fopen(icountfilename(), "w"); ! 71: unsigned long int total; 1.1 root 72: int i; 1.1.1.3 ! root 73: ! 74: write_log ("Writing instruction count file...\n"); ! 75: for (i=0; i < 65536; i++) { 1.1 root 76: opcodenums[i] = i; 1.1.1.3 ! root 77: total += instrcount[i]; 1.1 root 78: } 1.1.1.3 ! root 79: qsort(opcodenums, 65536, sizeof(uae_u16), compfn); ! 80: ! 81: fprintf (f, "Total: %lu\n", total); ! 82: for (i=0; i < 65536; i++) { 1.1 root 83: unsigned long int cnt = instrcount[opcodenums[i]]; 84: struct instr *dp; 85: struct mnemolookup *lookup; 86: if (!cnt) 87: break; 88: dp = table68k + opcodenums[i]; 89: for (lookup = lookuptab;lookup->mnemo != dp->mnemo; lookup++) ; 1.1.1.3 ! root 90: fprintf (f, "%04x: %lu %s\n", opcodenums[i], cnt, lookup->name); 1.1 root 91: } 92: fclose(f); 93: } 94: #else 95: void dump_counts(void) 96: { 97: } 98: #endif 99: 100: int broken_in; 101: 1.1.1.3 ! root 102: static void build_cpufunctbl (void) ! 103: { ! 104: int i; ! 105: unsigned long opcode; ! 106: struct cputbl *tbl = (currprefs.cpu_level == 3 ? op_smalltbl_0 ! 107: : currprefs.cpu_level == 2 ? op_smalltbl_1 ! 108: : currprefs.cpu_level == 1 ? op_smalltbl_2 ! 109: : currprefs.cpu_compatible ? op_smalltbl_4 ! 110: : op_smalltbl_3); ! 111: ! 112: sprintf (warning_buffer, "Building CPU function table (%d %d %d).\n", ! 113: currprefs.cpu_level, currprefs.cpu_compatible, currprefs.address_space_24); ! 114: write_log (warning_buffer); ! 115: ! 116: for (opcode = 0; opcode < 65536; opcode++) ! 117: cpufunctbl[opcode] = op_illg; ! 118: for (i = 0; tbl[i].handler != NULL; i++) { ! 119: if (! tbl[i].specific) ! 120: cpufunctbl[tbl[i].opcode] = tbl[i].handler; ! 121: } ! 122: for (opcode = 0; opcode < 65536; opcode++) { ! 123: cpuop_func *f; ! 124: ! 125: if (table68k[opcode].mnemo == i_ILLG || table68k[opcode].clev > currprefs.cpu_level) ! 126: continue; ! 127: ! 128: if (table68k[opcode].handler != -1) { ! 129: f = cpufunctbl[table68k[opcode].handler]; ! 130: if (f == op_illg) ! 131: abort(); ! 132: cpufunctbl[opcode] = f; ! 133: } ! 134: } ! 135: for (i = 0; tbl[i].handler != NULL; i++) { ! 136: if (tbl[i].specific) ! 137: cpufunctbl[tbl[i].opcode] = tbl[i].handler; ! 138: } ! 139: } ! 140: ! 141: void check_prefs_changed_cpu (void) ! 142: { ! 143: if (currprefs.cpu_level != changed_prefs.cpu_level ! 144: || currprefs.cpu_compatible != changed_prefs.cpu_compatible) { ! 145: currprefs.cpu_level = changed_prefs.cpu_level; ! 146: currprefs.cpu_compatible = changed_prefs.cpu_compatible; ! 147: build_cpufunctbl (); ! 148: } ! 149: currprefs.m68k_speed = changed_prefs.m68k_speed; ! 150: } ! 151: 1.1 root 152: void init_m68k (void) 153: { 1.1.1.3 ! root 154: int i; ! 155: 1.1 root 156: for (i = 0 ; i < 256 ; i++) { 1.1.1.3 ! root 157: int j; 1.1 root 158: for (j = 0 ; j < 8 ; j++) { 159: if (i & (1 << j)) break; 160: } 161: movem_index1[i] = j; 162: movem_index2[i] = 7-j; 163: movem_next[i] = i & (~(1 << j)); 164: } 165: for (i = 0 ; i < 256 ; i++) { 1.1.1.3 ! root 166: int j; 1.1 root 167: for (j = 7 ; j >= 0 ; j--) { 168: if (i & (1 << j)) break; 169: } 170: fpp_movem_index1[i] = j; 171: fpp_movem_index2[i] = 7-j; 172: fpp_movem_next[i] = i & (~(1 << j)); 173: } 174: #if COUNT_INSTRS 175: { 1.1.1.3 ! root 176: FILE *f = fopen(icountfilename(), "r"); 1.1 root 177: memset(instrcount, 0, sizeof instrcount); 178: if (f) { 1.1.1.3 ! root 179: uae_u32 opcode, count, total; 1.1 root 180: char name[20]; 1.1.1.3 ! root 181: write_log ("Reading instruction count file...\n"); 1.1 root 182: fscanf(f,"Total: %lu\n",&total); 183: while(fscanf(f,"%lx: %lu %s\n",&opcode,&count,name)==3) { 184: instrcount[opcode] = count; 185: } 186: fclose(f); 187: } 188: } 189: #endif 1.1.1.3 ! root 190: write_log("Building CPU table... "); 1.1 root 191: read_table68k (); 192: do_merges (); 1.1.1.2 root 193: 1.1.1.3 ! root 194: sprintf (warning_buffer, "%d CPU functions\n", nr_cpuop_funcs); ! 195: write_log (warning_buffer); 1.1 root 196: 1.1.1.3 ! root 197: build_cpufunctbl (); ! 198: } 1.1 root 199: struct regstruct regs, lastint_regs; 200: static struct regstruct regs_backup[16]; 201: static int backup_pointer = 0; 1.1.1.3 ! root 202: static long int m68kpc_offset; 1.1 root 203: int lastint_no; 204: 1.1.1.3 ! root 205: #define get_ibyte_1(o) get_byte(regs.pc + (regs.pc_p - regs.pc_oldp) + (o) + 1) ! 206: #define get_iword_1(o) get_word(regs.pc + (regs.pc_p - regs.pc_oldp) + (o)) ! 207: #define get_ilong_1(o) get_long(regs.pc + (regs.pc_p - regs.pc_oldp) + (o)) ! 208: ! 209: uae_s32 ShowEA(int reg, amodes mode, wordsizes size, char *buf) ! 210: { ! 211: uae_u16 dp; ! 212: uae_s8 disp8; ! 213: uae_s16 disp16; 1.1 root 214: int r; 1.1.1.3 ! root 215: uae_u32 dispreg; ! 216: uaecptr addr; ! 217: uae_s32 offset = 0; 1.1.1.2 root 218: char buffer[80]; 1.1.1.3 ! root 219: ! 220: switch (mode){ 1.1 root 221: case Dreg: 1.1.1.3 ! root 222: sprintf (buffer,"D%d", reg); 1.1 root 223: break; 224: case Areg: 1.1.1.3 ! root 225: sprintf (buffer,"A%d", reg); 1.1 root 226: break; 227: case Aind: 1.1.1.3 ! root 228: sprintf (buffer,"(A%d)", reg); 1.1 root 229: break; 230: case Aipi: 1.1.1.3 ! root 231: sprintf (buffer,"(A%d)+", reg); 1.1 root 232: break; 233: case Apdi: 1.1.1.3 ! root 234: sprintf (buffer,"-(A%d)", reg); 1.1 root 235: break; 236: case Ad16: 1.1.1.3 ! root 237: disp16 = get_iword_1(m68kpc_offset); m68kpc_offset += 2; ! 238: addr = m68k_areg(regs,reg) + (uae_s16)disp16; ! 239: sprintf (buffer,"(A%d,$%04x) == $%08lx", reg, disp16 & 0xffff, 1.1 root 240: (long unsigned int)addr); 241: break; 242: case Ad8r: 1.1.1.3 ! root 243: dp = get_iword_1(m68kpc_offset); m68kpc_offset += 2; 1.1 root 244: disp8 = dp & 0xFF; 245: r = (dp & 0x7000) >> 12; 1.1.1.3 ! root 246: dispreg = dp & 0x8000 ? m68k_areg(regs,r) : m68k_dreg(regs,r); ! 247: if (!(dp & 0x800)) dispreg = (uae_s32)(uae_s16)(dispreg); 1.1 root 248: dispreg <<= (dp >> 9) & 3; 1.1.1.3 ! root 249: 1.1 root 250: if (dp & 0x100) { 1.1.1.3 ! root 251: uae_s32 outer = 0, disp = 0; ! 252: uae_s32 base = m68k_areg(regs,reg); ! 253: char name[10]; ! 254: sprintf (name,"A%d, ",reg); ! 255: if (dp & 0x80) { base = 0; name[0] = 0; } ! 256: if (dp & 0x40) dispreg = 0; ! 257: if ((dp & 0x30) == 0x20) { disp = (uae_s32)(uae_s16)get_iword_1(m68kpc_offset); m68kpc_offset += 2; } ! 258: if ((dp & 0x30) == 0x30) { disp = get_ilong_1(m68kpc_offset); m68kpc_offset += 4; } ! 259: base += disp; ! 260: ! 261: if ((dp & 0x3) == 0x2) { outer = (uae_s32)(uae_s16)get_iword_1(m68kpc_offset); m68kpc_offset += 2; } ! 262: if ((dp & 0x3) == 0x3) { outer = get_ilong_1(m68kpc_offset); m68kpc_offset += 4; } ! 263: ! 264: if (!(dp & 4)) base += dispreg; ! 265: if (dp & 3) base = get_long (base); ! 266: if (dp & 4) base += dispreg; ! 267: ! 268: addr = base + outer; ! 269: sprintf (buffer,"(%s%c%d.%c*%d+%ld)+%ld == $%08lx", name, ! 270: dp & 0x8000 ? 'A' : 'D', (int)r, dp & 0x800 ? 'L' : 'W', ! 271: 1 << ((dp >> 9) & 3), ! 272: disp,outer, ! 273: (long unsigned int)addr); ! 274: } else { ! 275: addr = m68k_areg(regs,reg) + (uae_s32)((uae_s8)disp8) + dispreg; ! 276: sprintf (buffer,"(A%d, %c%d.%c*%d, $%02x) == $%08lx", reg, 1.1 root 277: dp & 0x8000 ? 'A' : 'D', (int)r, dp & 0x800 ? 'L' : 'W', 278: 1 << ((dp >> 9) & 3), disp8, 279: (long unsigned int)addr); 280: } 281: break; 282: case PC16: 1.1.1.3 ! root 283: addr = m68k_getpc() + m68kpc_offset; ! 284: disp16 = get_iword_1(m68kpc_offset); m68kpc_offset += 2; ! 285: addr += (uae_s16)disp16; ! 286: sprintf (buffer,"(PC,$%04x) == $%08lx", disp16 & 0xffff,(long unsigned int)addr); 1.1 root 287: break; 288: case PC8r: 1.1.1.3 ! root 289: addr = m68k_getpc() + m68kpc_offset; ! 290: dp = get_iword_1(m68kpc_offset); m68kpc_offset += 2; 1.1 root 291: disp8 = dp & 0xFF; 292: r = (dp & 0x7000) >> 12; 1.1.1.2 root 293: dispreg = dp & 0x8000 ? m68k_areg(regs,r) : m68k_dreg(regs,r); 1.1.1.3 ! root 294: if (!(dp & 0x800)) dispreg = (uae_s32)(uae_s16)(dispreg); 1.1 root 295: dispreg <<= (dp >> 9) & 3; 1.1.1.3 ! root 296: 1.1 root 297: if (dp & 0x100) { 1.1.1.3 ! root 298: uae_s32 outer = 0,disp = 0; ! 299: uae_s32 base = addr; ! 300: char name[10]; ! 301: sprintf (name,"PC, "); ! 302: if (dp & 0x80) { base = 0; name[0] = 0; } ! 303: if (dp & 0x40) dispreg = 0; ! 304: if ((dp & 0x30) == 0x20) { disp = (uae_s32)(uae_s16)get_iword_1(m68kpc_offset); m68kpc_offset += 2; } ! 305: if ((dp & 0x30) == 0x30) { disp = get_ilong_1(m68kpc_offset); m68kpc_offset += 4; } ! 306: base += disp; ! 307: ! 308: if ((dp & 0x3) == 0x2) { outer = (uae_s32)(uae_s16)get_iword_1(m68kpc_offset); m68kpc_offset += 2; } ! 309: if ((dp & 0x3) == 0x3) { outer = get_ilong_1(m68kpc_offset); m68kpc_offset += 4; } ! 310: ! 311: if (!(dp & 4)) base += dispreg; ! 312: if (dp & 3) base = get_long (base); ! 313: if (dp & 4) base += dispreg; ! 314: ! 315: addr = base + outer; ! 316: sprintf (buffer,"(%s%c%d.%c*%d+%ld)+%ld == $%08lx", name, ! 317: dp & 0x8000 ? 'A' : 'D', (int)r, dp & 0x800 ? 'L' : 'W', ! 318: 1 << ((dp >> 9) & 3), ! 319: disp,outer, ! 320: (long unsigned int)addr); 1.1.1.2 root 321: } else { 1.1.1.3 ! root 322: addr += (uae_s32)((uae_s8)disp8) + dispreg; ! 323: sprintf (buffer,"(PC, %c%d.%c*%d, $%02x) == $%08lx", dp & 0x8000 ? 'A' : 'D', 1.1 root 324: (int)r, dp & 0x800 ? 'L' : 'W', 1 << ((dp >> 9) & 3), 325: disp8, (long unsigned int)addr); 326: } 327: break; 328: case absw: 1.1.1.3 ! root 329: sprintf (buffer,"$%08lx", (long unsigned int)(uae_s32)(uae_s16)get_iword_1(m68kpc_offset)); ! 330: m68kpc_offset += 2; 1.1 root 331: break; 332: case absl: 1.1.1.3 ! root 333: sprintf (buffer,"$%08lx", (long unsigned int)get_ilong_1(m68kpc_offset)); ! 334: m68kpc_offset += 4; 1.1 root 335: break; 336: case imm: 1.1.1.3 ! root 337: switch (size){ 1.1 root 338: case sz_byte: 1.1.1.3 ! root 339: sprintf (buffer,"#$%02x", (unsigned int)(get_iword_1(m68kpc_offset) & 0xff)); ! 340: m68kpc_offset += 2; ! 341: break; 1.1 root 342: case sz_word: 1.1.1.3 ! root 343: sprintf (buffer,"#$%04x", (unsigned int)(get_iword_1(m68kpc_offset) & 0xffff)); ! 344: m68kpc_offset += 2; ! 345: break; 1.1 root 346: case sz_long: 1.1.1.3 ! root 347: sprintf (buffer,"#$%08lx", (long unsigned int)(get_ilong_1(m68kpc_offset))); ! 348: m68kpc_offset += 4; ! 349: break; 1.1 root 350: default: 351: break; 352: } 353: break; 354: case imm0: 1.1.1.3 ! root 355: offset = (uae_s32)(uae_s8)get_iword_1(m68kpc_offset); ! 356: m68kpc_offset += 2; ! 357: sprintf (buffer,"#$%02x", (unsigned int)(offset & 0xff)); 1.1 root 358: break; 359: case imm1: 1.1.1.3 ! root 360: offset = (uae_s32)(uae_s16)get_iword_1(m68kpc_offset); ! 361: m68kpc_offset += 2; ! 362: sprintf (buffer,"#$%04x", (unsigned int)(offset & 0xffff)); 1.1 root 363: break; 364: case imm2: 1.1.1.3 ! root 365: offset = (uae_s32)get_ilong_1(m68kpc_offset); ! 366: m68kpc_offset += 4; ! 367: sprintf (buffer,"#$%08lx", (long unsigned int)offset); 1.1 root 368: break; 369: case immi: 1.1.1.3 ! root 370: offset = (uae_s32)(uae_s8)(reg & 0xff); ! 371: sprintf (buffer,"#$%08lx", (long unsigned int)offset); 1.1 root 372: break; 373: default: 374: break; 375: } 1.1.1.2 root 376: if (buf == 0) 1.1.1.3 ! root 377: printf ("%s", buffer); 1.1.1.2 root 378: else 379: strcat(buf, buffer); 380: return offset; 1.1 root 381: } 382: 1.1.1.3 ! root 383: /* The plan is that this will take over the job of exception 3 handling - ! 384: * the CPU emulation functions will just do a longjmp to m68k_go whenever ! 385: * they hit an odd address. */ ! 386: static int verify_ea(int reg, amodes mode, wordsizes size, uae_u32 *val) ! 387: { ! 388: uae_u16 dp; ! 389: uae_s8 disp8; ! 390: uae_s16 disp16; ! 391: int r; ! 392: uae_u32 dispreg; ! 393: uaecptr addr; ! 394: uae_s32 offset = 0; ! 395: ! 396: switch (mode){ ! 397: case Dreg: ! 398: *val = m68k_dreg (regs, reg); ! 399: return 1; ! 400: case Areg: ! 401: *val = m68k_areg (regs, reg); ! 402: return 1; ! 403: ! 404: case Aind: ! 405: case Aipi: ! 406: addr = m68k_areg (regs, reg); ! 407: break; ! 408: case Apdi: ! 409: addr = m68k_areg (regs, reg); ! 410: break; ! 411: case Ad16: ! 412: disp16 = get_iword_1(m68kpc_offset); m68kpc_offset += 2; ! 413: addr = m68k_areg(regs,reg) + (uae_s16)disp16; ! 414: break; ! 415: case Ad8r: ! 416: addr = m68k_areg (regs, reg); ! 417: d8r_common: ! 418: dp = get_iword_1(m68kpc_offset); m68kpc_offset += 2; ! 419: disp8 = dp & 0xFF; ! 420: r = (dp & 0x7000) >> 12; ! 421: dispreg = dp & 0x8000 ? m68k_areg(regs,r) : m68k_dreg(regs,r); ! 422: if (!(dp & 0x800)) dispreg = (uae_s32)(uae_s16)(dispreg); ! 423: dispreg <<= (dp >> 9) & 3; ! 424: ! 425: if (dp & 0x100) { ! 426: uae_s32 outer = 0, disp = 0; ! 427: uae_s32 base = addr; ! 428: if (dp & 0x80) base = 0; ! 429: if (dp & 0x40) dispreg = 0; ! 430: if ((dp & 0x30) == 0x20) { disp = (uae_s32)(uae_s16)get_iword_1(m68kpc_offset); m68kpc_offset += 2; } ! 431: if ((dp & 0x30) == 0x30) { disp = get_ilong_1(m68kpc_offset); m68kpc_offset += 4; } ! 432: base += disp; ! 433: ! 434: if ((dp & 0x3) == 0x2) { outer = (uae_s32)(uae_s16)get_iword_1(m68kpc_offset); m68kpc_offset += 2; } ! 435: if ((dp & 0x3) == 0x3) { outer = get_ilong_1(m68kpc_offset); m68kpc_offset += 4; } ! 436: ! 437: if (!(dp & 4)) base += dispreg; ! 438: if (dp & 3) base = get_long (base); ! 439: if (dp & 4) base += dispreg; ! 440: ! 441: addr = base + outer; ! 442: } else { ! 443: addr += (uae_s32)((uae_s8)disp8) + dispreg; ! 444: } ! 445: break; ! 446: case PC16: ! 447: addr = m68k_getpc() + m68kpc_offset; ! 448: disp16 = get_iword_1(m68kpc_offset); m68kpc_offset += 2; ! 449: addr += (uae_s16)disp16; ! 450: break; ! 451: case PC8r: ! 452: addr = m68k_getpc() + m68kpc_offset; ! 453: goto d8r_common; ! 454: case absw: ! 455: addr = (uae_s32)(uae_s16)get_iword_1(m68kpc_offset); ! 456: m68kpc_offset += 2; ! 457: break; ! 458: case absl: ! 459: addr = get_ilong_1(m68kpc_offset); ! 460: m68kpc_offset += 4; ! 461: break; ! 462: case imm: ! 463: switch (size){ ! 464: case sz_byte: ! 465: *val = get_iword_1(m68kpc_offset) & 0xff; ! 466: m68kpc_offset += 2; ! 467: break; ! 468: case sz_word: ! 469: *val = get_iword_1(m68kpc_offset) & 0xffff; ! 470: m68kpc_offset += 2; ! 471: break; ! 472: case sz_long: ! 473: *val = get_ilong_1(m68kpc_offset); ! 474: m68kpc_offset += 4; ! 475: break; ! 476: default: ! 477: break; ! 478: } ! 479: return 1; ! 480: case imm0: ! 481: *val = (uae_s32)(uae_s8)get_iword_1 (m68kpc_offset); ! 482: m68kpc_offset += 2; ! 483: return 1; ! 484: case imm1: ! 485: *val = (uae_s32)(uae_s16)get_iword_1 (m68kpc_offset); ! 486: m68kpc_offset += 2; ! 487: return 1; ! 488: case imm2: ! 489: *val = get_ilong_1 (m68kpc_offset); ! 490: m68kpc_offset += 4; ! 491: return 1; ! 492: case immi: ! 493: *val = (uae_s32)(uae_s8)(reg & 0xff); ! 494: return 1; ! 495: default: ! 496: addr = 0; ! 497: break; ! 498: } ! 499: if ((addr & 1) == 0) ! 500: return 1; ! 501: ! 502: last_addr_for_exception_3 = m68k_getpc() + m68kpc_offset; ! 503: last_fault_for_exception_3 = addr; ! 504: return 0; ! 505: } ! 506: 1.1 root 507: void MakeSR(void) 508: { 509: #if 0 510: assert((regs.t1 & 1) == regs.t1); 511: assert((regs.t0 & 1) == regs.t0); 512: assert((regs.s & 1) == regs.s); 513: assert((regs.m & 1) == regs.m); 514: assert((XFLG & 1) == XFLG); 515: assert((NFLG & 1) == NFLG); 516: assert((ZFLG & 1) == ZFLG); 517: assert((VFLG & 1) == VFLG); 518: assert((CFLG & 1) == CFLG); 519: #endif 520: regs.sr = ((regs.t1 << 15) | (regs.t0 << 14) 521: | (regs.s << 13) | (regs.m << 12) | (regs.intmask << 8) 1.1.1.3 ! root 522: | (XFLG << 4) | (NFLG << 3) | (ZFLG << 2) | (VFLG << 1) 1.1 root 523: | CFLG); 524: } 525: 526: void MakeFromSR(void) 527: { 528: int oldm = regs.m; 529: int olds = regs.s; 530: 531: regs.t1 = (regs.sr >> 15) & 1; 532: regs.t0 = (regs.sr >> 14) & 1; 533: regs.s = (regs.sr >> 13) & 1; 534: regs.m = (regs.sr >> 12) & 1; 535: regs.intmask = (regs.sr >> 8) & 7; 536: XFLG = (regs.sr >> 4) & 1; 537: NFLG = (regs.sr >> 3) & 1; 538: ZFLG = (regs.sr >> 2) & 1; 539: VFLG = (regs.sr >> 1) & 1; 540: CFLG = regs.sr & 1; 1.1.1.3 ! root 541: if (currprefs.cpu_level >= 2) { 1.1 root 542: if (olds != regs.s) { 1.1.1.3 ! root 543: if (olds) { ! 544: if (oldm) ! 545: regs.msp = m68k_areg(regs, 7); ! 546: else ! 547: regs.isp = m68k_areg(regs, 7); ! 548: m68k_areg(regs, 7) = regs.usp; ! 549: } else { ! 550: regs.usp = m68k_areg(regs, 7); ! 551: m68k_areg(regs, 7) = regs.m ? regs.msp : regs.isp; ! 552: } 1.1 root 553: } else if (olds && oldm != regs.m) { 554: if (oldm) { 1.1.1.2 root 555: regs.msp = m68k_areg(regs, 7); 556: m68k_areg(regs, 7) = regs.isp; 557: } else { 558: regs.isp = m68k_areg(regs, 7); 559: m68k_areg(regs, 7) = regs.msp; 1.1 root 560: } 561: } 562: } else { 563: if (olds != regs.s) { 1.1.1.3 ! root 564: if (olds) { ! 565: regs.isp = m68k_areg(regs, 7); ! 566: m68k_areg(regs, 7) = regs.usp; ! 567: } else { ! 568: regs.usp = m68k_areg(regs, 7); ! 569: m68k_areg(regs, 7) = regs.isp; ! 570: } ! 571: } 1.1 root 572: } 1.1.1.3 ! root 573: 1.1 root 574: regs.spcflags |= SPCFLAG_INT; 575: if (regs.t1 || regs.t0) 1.1.1.3 ! root 576: regs.spcflags |= SPCFLAG_TRACE; 1.1 root 577: else 1.1.1.3 ! root 578: regs.spcflags &= ~(SPCFLAG_TRACE | SPCFLAG_DOTRACE); 1.1 root 579: } 580: 1.1.1.3 ! root 581: void Exception(int nr, uaecptr oldpc) 1.1 root 582: { 1.1.1.2 root 583: compiler_flush_jsr_stack(); 1.1 root 584: MakeSR(); 585: if (!regs.s) { 1.1.1.2 root 586: regs.usp = m68k_areg(regs, 7); 1.1.1.3 ! root 587: if (currprefs.cpu_level >= 2) ! 588: m68k_areg(regs, 7) = regs.m ? regs.msp : regs.isp; ! 589: else ! 590: m68k_areg(regs, 7) = regs.isp; 1.1 root 591: regs.s = 1; 592: } 1.1.1.3 ! root 593: if (currprefs.cpu_level > 0) { 1.1 root 594: if (nr == 2 || nr == 3) { 595: int i; 1.1.1.3 ! root 596: /* @@@ this is probably wrong (?) */ 1.1 root 597: for (i = 0 ; i < 12 ; i++) { 1.1.1.2 root 598: m68k_areg(regs, 7) -= 2; 599: put_word (m68k_areg(regs, 7), 0); 1.1 root 600: } 1.1.1.2 root 601: m68k_areg(regs, 7) -= 2; 602: put_word (m68k_areg(regs, 7), 0xa000 + nr * 4); 1.1 root 603: } else if (nr ==5 || nr == 6 || nr == 7 || nr == 9) { 1.1.1.3 ! root 604: m68k_areg(regs, 7) -= 4; ! 605: put_long (m68k_areg(regs, 7), oldpc); ! 606: m68k_areg(regs, 7) -= 2; ! 607: put_word (m68k_areg(regs, 7), 0x2000 + nr * 4); ! 608: } else if (regs.m && nr >= 24 && nr < 32) { ! 609: m68k_areg(regs, 7) -= 2; ! 610: put_word (m68k_areg(regs, 7), nr * 4); ! 611: m68k_areg(regs, 7) -= 4; ! 612: put_long (m68k_areg(regs, 7), m68k_getpc ()); ! 613: m68k_areg(regs, 7) -= 2; ! 614: put_word (m68k_areg(regs, 7), regs.sr); ! 615: regs.sr |= (1 << 13); ! 616: regs.msp = m68k_areg(regs, 7); ! 617: m68k_areg(regs, 7) = regs.isp; ! 618: m68k_areg(regs, 7) -= 2; ! 619: put_word (m68k_areg(regs, 7), 0x1000 + nr * 4); ! 620: } else { ! 621: m68k_areg(regs, 7) -= 2; ! 622: put_word (m68k_areg(regs, 7), nr * 4); ! 623: } ! 624: } else { ! 625: if (nr == 2 || nr == 3) { ! 626: m68k_areg(regs, 7) -= 12; ! 627: /* ??????? */ ! 628: if (nr == 3) { ! 629: put_long (m68k_areg(regs, 7), last_fault_for_exception_3); ! 630: put_word (m68k_areg(regs, 7)+4, last_op_for_exception_3); ! 631: put_long (m68k_areg(regs, 7)+8, last_addr_for_exception_3); ! 632: } ! 633: write_log ("Exception!\n"); ! 634: goto kludge_me_do; ! 635: } 1.1 root 636: } 1.1.1.2 root 637: m68k_areg(regs, 7) -= 4; 638: put_long (m68k_areg(regs, 7), m68k_getpc ()); 1.1.1.3 ! root 639: kludge_me_do: 1.1.1.2 root 640: m68k_areg(regs, 7) -= 2; 641: put_word (m68k_areg(regs, 7), regs.sr); 1.1.1.3 ! root 642: m68k_setpc (get_long (regs.vbr + 4*nr)); ! 643: fill_prefetch_0 (); 1.1 root 644: regs.t1 = regs.t0 = regs.m = 0; 645: regs.spcflags &= ~(SPCFLAG_TRACE | SPCFLAG_DOTRACE); 646: } 647: 648: static void Interrupt(int nr) 649: { 650: assert(nr < 8 && nr >= 0); 651: lastint_regs = regs; 652: lastint_no = nr; 653: Exception(nr+24, 0); 1.1.1.3 ! root 654: 1.1 root 655: regs.intmask = nr; 656: regs.spcflags |= SPCFLAG_INT; 657: } 658: 659: static int caar, cacr; 660: 1.1.1.3 ! root 661: void m68k_move2c (int regno, uae_u32 *regp) 1.1 root 662: { 1.1.1.3 ! root 663: if (currprefs.cpu_level == 1 && (regno & 0x7FF) > 1) 1.1 root 664: op_illg (0x4E7B); 665: else 666: switch (regno) { 667: case 0: regs.sfc = *regp & 7; break; 668: case 1: regs.dfc = *regp & 7; break; 669: case 2: cacr = *regp & 0x3; break; /* ignore C and CE */ 670: case 0x800: regs.usp = *regp; break; 671: case 0x801: regs.vbr = *regp; break; 672: case 0x802: caar = *regp &0xfc; break; 1.1.1.2 root 673: case 0x803: regs.msp = *regp; if (regs.m == 1) m68k_areg(regs, 7) = regs.msp; break; 674: case 0x804: regs.isp = *regp; if (regs.m == 0) m68k_areg(regs, 7) = regs.isp; break; 1.1 root 675: default: 676: op_illg (0x4E7B); 677: break; 678: } 679: } 680: 1.1.1.3 ! root 681: void m68k_movec2 (int regno, uae_u32 *regp) 1.1 root 682: { 1.1.1.3 ! root 683: if (currprefs.cpu_level == 1 && (regno & 0x7FF) > 1) 1.1 root 684: op_illg (0x4E7A); 685: else 686: switch (regno) { 687: case 0: *regp = regs.sfc; break; 688: case 1: *regp = regs.dfc; break; 689: case 2: *regp = cacr; break; 690: case 0x800: *regp = regs.usp; break; 691: case 0x801: *regp = regs.vbr; break; 692: case 0x802: *regp = caar; break; 1.1.1.2 root 693: case 0x803: *regp = regs.m == 1 ? m68k_areg(regs, 7) : regs.msp; break; 694: case 0x804: *regp = regs.m == 0 ? m68k_areg(regs, 7) : regs.isp; break; 1.1 root 695: default: 696: op_illg (0x4E7A); 697: break; 698: } 699: } 700: 701: static __inline__ int 1.1.1.3 ! root 702: div_unsigned(uae_u32 src_hi, uae_u32 src_lo, uae_u32 div, uae_u32 *quot, uae_u32 *rem) 1.1 root 703: { 1.1.1.3 ! root 704: uae_u32 q = 0, cbit = 0; 1.1 root 705: int i; 706: 707: if (div <= src_hi) { 708: return(1); 709: } 710: for (i = 0 ; i < 32 ; i++) { 1.1.1.2 root 711: cbit = src_hi & 0x80000000ul; 1.1 root 712: src_hi <<= 1; 1.1.1.2 root 713: if (src_lo & 0x80000000ul) src_hi++; 1.1 root 714: src_lo <<= 1; 715: q = q << 1; 716: if (cbit || div <= src_hi) { 717: q |= 1; 718: src_hi -= div; 719: } 720: } 721: *quot = q; 722: *rem = src_hi; 723: return(0); 724: } 725: 1.1.1.3 ! root 726: void m68k_divl (uae_u32 opcode, uae_u32 src, uae_u16 extra, uaecptr oldpc) 1.1 root 727: { 1.1.1.3 ! root 728: #if defined(uae_s64) 1.1 root 729: if (src == 0) { 1.1.1.3 ! root 730: Exception(5,oldpc); 1.1 root 731: return; 732: } 733: if (extra & 0x800) { 734: /* signed variant */ 1.1.1.3 ! root 735: uae_s64 a = (uae_s64)(uae_s32)m68k_dreg(regs, (extra >> 12) & 7); ! 736: uae_s64 quot, rem; ! 737: 1.1 root 738: if (extra & 0x400) { 1.1.1.3 ! root 739: a &= 0xffffffffu; ! 740: a |= (uae_s64)m68k_dreg(regs, extra & 7) << 32; 1.1 root 741: } 1.1.1.3 ! root 742: rem = a % (uae_s64)(uae_s32)src; ! 743: quot = a / (uae_s64)(uae_s32)src; ! 744: if ((quot & UVAL64(0xffffffff80000000)) != 0 ! 745: && (quot & UVAL64(0xffffffff80000000)) != UVAL64(0xffffffff80000000)) ! 746: { 1.1 root 747: VFLG = NFLG = 1; 748: CFLG = 0; 749: } 750: else { 1.1.1.3 ! root 751: if (((uae_s32)rem < 0) != ((uae_s64)a < 0)) rem = -rem; 1.1 root 752: VFLG = CFLG = 0; 1.1.1.3 ! root 753: ZFLG = ((uae_s32)quot) == 0; ! 754: NFLG = ((uae_s32)quot) < 0; 1.1.1.2 root 755: m68k_dreg(regs, extra & 7) = rem; 756: m68k_dreg(regs, (extra >> 12) & 7) = quot; 1.1 root 757: } 758: } else { 759: /* unsigned */ 1.1.1.3 ! root 760: uae_u64 a = (uae_u64)(uae_u32)m68k_dreg(regs, (extra >> 12) & 7); ! 761: uae_u64 quot, rem; ! 762: 1.1 root 763: if (extra & 0x400) { 1.1.1.3 ! root 764: a &= 0xffffffffu; ! 765: a |= (uae_u64)m68k_dreg(regs, extra & 7) << 32; 1.1 root 766: } 1.1.1.3 ! root 767: rem = a % (uae_u64)src; ! 768: quot = a / (uae_u64)src; ! 769: if (quot > 0xffffffffu) { 1.1 root 770: VFLG = NFLG = 1; 771: CFLG = 0; 772: } 773: else { 774: VFLG = CFLG = 0; 1.1.1.3 ! root 775: ZFLG = ((uae_s32)quot) == 0; ! 776: NFLG = ((uae_s32)quot) < 0; 1.1.1.2 root 777: m68k_dreg(regs, extra & 7) = rem; 778: m68k_dreg(regs, (extra >> 12) & 7) = quot; 1.1 root 779: } 780: } 781: #else 782: if (src == 0) { 1.1.1.3 ! root 783: Exception(5,oldpc); 1.1 root 784: return; 785: } 786: if (extra & 0x800) { 787: /* signed variant */ 1.1.1.3 ! root 788: uae_s32 lo = (uae_s32)m68k_dreg(regs, (extra >> 12) & 7); ! 789: uae_s32 hi = lo < 0 ? -1 : 0; ! 790: uae_s32 save_high; ! 791: uae_u32 quot, rem; ! 792: uae_u32 sign; ! 793: 1.1 root 794: if (extra & 0x400) { 1.1.1.3 ! root 795: hi = (uae_s32)m68k_dreg(regs, extra & 7); 1.1 root 796: } 797: save_high = hi; 798: sign = (hi ^ src); 799: if (hi < 0) { 800: hi = ~hi; 801: lo = -lo; 802: if (lo == 0) hi++; 803: } 1.1.1.3 ! root 804: if ((uae_s32)src < 0) src = -src; 1.1 root 805: if (div_unsigned(hi, lo, src, ", &rem) || 806: (sign & 0x80000000) ? quot > 0x80000000 : quot > 0x7fffffff) { 807: VFLG = NFLG = 1; 808: CFLG = 0; 809: } 810: else { 811: if (sign & 0x80000000) quot = -quot; 1.1.1.3 ! root 812: if (((uae_s32)rem < 0) != (save_high < 0)) rem = -rem; 1.1 root 813: VFLG = CFLG = 0; 1.1.1.3 ! root 814: ZFLG = ((uae_s32)quot) == 0; ! 815: NFLG = ((uae_s32)quot) < 0; 1.1.1.2 root 816: m68k_dreg(regs, extra & 7) = rem; 817: m68k_dreg(regs, (extra >> 12) & 7) = quot; 1.1 root 818: } 819: } else { 820: /* unsigned */ 1.1.1.3 ! root 821: uae_u32 lo = (uae_u32)m68k_dreg(regs, (extra >> 12) & 7); ! 822: uae_u32 hi = 0; ! 823: uae_u32 quot, rem; ! 824: 1.1 root 825: if (extra & 0x400) { 1.1.1.3 ! root 826: hi = (uae_u32)m68k_dreg(regs, extra & 7); 1.1 root 827: } 828: if (div_unsigned(hi, lo, src, ", &rem)) { 829: VFLG = NFLG = 1; 830: CFLG = 0; 831: } 832: else { 833: VFLG = CFLG = 0; 1.1.1.3 ! root 834: ZFLG = ((uae_s32)quot) == 0; ! 835: NFLG = ((uae_s32)quot) < 0; 1.1.1.2 root 836: m68k_dreg(regs, extra & 7) = rem; 837: m68k_dreg(regs, (extra >> 12) & 7) = quot; 1.1 root 838: } 839: } 840: #endif 841: } 842: 843: static __inline__ void 1.1.1.3 ! root 844: mul_unsigned(uae_u32 src1, uae_u32 src2, uae_u32 *dst_hi, uae_u32 *dst_lo) 1.1 root 845: { 1.1.1.3 ! root 846: uae_u32 r0 = (src1 & 0xffff) * (src2 & 0xffff); ! 847: uae_u32 r1 = ((src1 >> 16) & 0xffff) * (src2 & 0xffff); ! 848: uae_u32 r2 = (src1 & 0xffff) * ((src2 >> 16) & 0xffff); ! 849: uae_u32 r3 = ((src1 >> 16) & 0xffff) * ((src2 >> 16) & 0xffff); ! 850: uae_u32 lo; ! 851: ! 852: lo = r0 + ((r1 << 16) & 0xffff0000ul); ! 853: if (lo < r0) r3++; ! 854: r0 = lo; ! 855: lo = r0 + ((r2 << 16) & 0xffff0000ul); ! 856: if (lo < r0) r3++; ! 857: r3 += ((r1 >> 16) & 0xffff) + ((r2 >> 16) & 0xffff); 1.1 root 858: *dst_lo = lo; 859: *dst_hi = r3; 860: } 861: 1.1.1.3 ! root 862: void m68k_mull (uae_u32 opcode, uae_u32 src, uae_u16 extra) 1.1 root 863: { 1.1.1.3 ! root 864: #if defined(uae_s64) 1.1 root 865: if (extra & 0x800) { 866: /* signed variant */ 1.1.1.3 ! root 867: uae_s64 a = (uae_s64)(uae_s32)m68k_dreg(regs, (extra >> 12) & 7); 1.1 root 868: 1.1.1.3 ! root 869: a *= (uae_s64)(uae_s32)src; 1.1 root 870: VFLG = CFLG = 0; 871: ZFLG = a == 0; 872: NFLG = a < 0; 873: if (extra & 0x400) 1.1.1.2 root 874: m68k_dreg(regs, extra & 7) = a >> 32; 1.1.1.3 ! root 875: else if ((a & UVAL64(0xffffffff80000000)) != 0 ! 876: && (a & UVAL64(0xffffffff80000000)) != UVAL64(0xffffffff80000000)) ! 877: { 1.1 root 878: VFLG = 1; 879: } 1.1.1.3 ! root 880: m68k_dreg(regs, (extra >> 12) & 7) = (uae_u32)a; 1.1 root 881: } else { 882: /* unsigned */ 1.1.1.3 ! root 883: uae_u64 a = (uae_u64)(uae_u32)m68k_dreg(regs, (extra >> 12) & 7); ! 884: ! 885: a *= (uae_u64)src; 1.1 root 886: VFLG = CFLG = 0; 887: ZFLG = a == 0; 1.1.1.3 ! root 888: NFLG = ((uae_s64)a) < 0; 1.1 root 889: if (extra & 0x400) 1.1.1.2 root 890: m68k_dreg(regs, extra & 7) = a >> 32; 1.1.1.3 ! root 891: else if ((a & UVAL64(0xffffffff00000000)) != 0) { 1.1 root 892: VFLG = 1; 893: } 1.1.1.3 ! root 894: m68k_dreg(regs, (extra >> 12) & 7) = (uae_u32)a; 1.1 root 895: } 896: #else 897: if (extra & 0x800) { 898: /* signed variant */ 1.1.1.3 ! root 899: uae_s32 src1,src2; ! 900: uae_u32 dst_lo,dst_hi; ! 901: uae_u32 sign; 1.1 root 902: 1.1.1.3 ! root 903: src1 = (uae_s32)src; ! 904: src2 = (uae_s32)m68k_dreg(regs, (extra >> 12) & 7); 1.1 root 905: sign = (src1 ^ src2); 906: if (src1 < 0) src1 = -src1; 907: if (src2 < 0) src2 = -src2; 1.1.1.3 ! root 908: mul_unsigned((uae_u32)src1,(uae_u32)src2,&dst_hi,&dst_lo); 1.1 root 909: if (sign & 0x80000000) { 910: dst_hi = ~dst_hi; 911: dst_lo = -dst_lo; 912: if (dst_lo == 0) dst_hi++; 913: } 914: VFLG = CFLG = 0; 915: ZFLG = dst_hi == 0 && dst_lo == 0; 1.1.1.3 ! root 916: NFLG = ((uae_s32)dst_hi) < 0; 1.1 root 917: if (extra & 0x400) 1.1.1.2 root 918: m68k_dreg(regs, extra & 7) = dst_hi; 1.1.1.3 ! root 919: else if ((dst_hi != 0 || (dst_lo & 0x80000000) != 0) ! 920: && ((dst_hi & 0xffffffff) != 0xffffffff ! 921: || (dst_lo & 0x80000000) != 0x80000000)) ! 922: { 1.1 root 923: VFLG = 1; 924: } 1.1.1.2 root 925: m68k_dreg(regs, (extra >> 12) & 7) = dst_lo; 1.1 root 926: } else { 927: /* unsigned */ 1.1.1.3 ! root 928: uae_u32 dst_lo,dst_hi; ! 929: ! 930: mul_unsigned(src,(uae_u32)m68k_dreg(regs, (extra >> 12) & 7),&dst_hi,&dst_lo); 1.1 root 931: 932: VFLG = CFLG = 0; 933: ZFLG = dst_hi == 0 && dst_lo == 0; 1.1.1.3 ! root 934: NFLG = ((uae_s32)dst_hi) < 0; 1.1 root 935: if (extra & 0x400) 1.1.1.2 root 936: m68k_dreg(regs, extra & 7) = dst_hi; 1.1 root 937: else if (dst_hi != 0) { 938: VFLG = 1; 939: } 1.1.1.2 root 940: m68k_dreg(regs, (extra >> 12) & 7) = dst_lo; 1.1 root 941: } 942: #endif 943: } 944: static char* ccnames[] = 945: { "T ","F ","HI","LS","CC","CS","NE","EQ", 946: "VC","VS","PL","MI","GE","LT","GT","LE" }; 947: 948: void m68k_reset(void) 949: { 1.1.1.3 ! root 950: m68k_areg (regs, 7) = get_long (0x00f80000); ! 951: m68k_setpc (get_long (0x00f80004)); ! 952: fill_prefetch_0 (); 1.1.1.2 root 953: regs.kick_mask = 0xF80000; 1.1 root 954: regs.s = 1; 955: regs.m = 0; 956: regs.stopped = 0; 957: regs.t1 = 0; 958: regs.t0 = 0; 959: ZFLG = CFLG = NFLG = VFLG = 0; 960: regs.spcflags = 0; 961: regs.intmask = 7; 962: regs.vbr = regs.sfc = regs.dfc = 0; 963: regs.fpcr = regs.fpsr = regs.fpiar = 0; 1.1.1.3 ! root 964: customreset (); 1.1 root 965: } 966: 1.1.1.3 ! root 967: void REGPARAM2 op_illg(uae_u32 opcode) 1.1 root 968: { 1.1.1.3 ! root 969: uaecptr pc = m68k_getpc (); ! 970: ! 971: if (cloanto_rom && (opcode & 0xF100) == 0x7100) { ! 972: m68k_dreg (regs, (opcode >> 9) & 7) = (uae_s8)(opcode & 0xFF); ! 973: m68k_incpc (2); ! 974: fill_prefetch_0 (); ! 975: return; ! 976: } ! 977: ! 978: compiler_flush_jsr_stack (); ! 979: if (opcode == 0x4E7B && get_long (0x10) == 0 && (pc & 0xF80000) == 0xF80000) { ! 980: write_log("Your Kickstart requires a 68020 CPU. Giving up.\n"); ! 981: broken_in = 1; 1.1 root 982: regs.spcflags |= SPCFLAG_BRK; 983: quit_program = 1; 984: } 1.1.1.2 root 985: if (opcode == 0xFF0D) { 1.1.1.3 ! root 986: if ((pc & 0xF80000) == 0xF80000) { 1.1.1.2 root 987: /* This is from the dummy Kickstart replacement */ 1.1.1.3 ! root 988: uae_u16 arg = get_iword (2); ! 989: m68k_incpc (4); ! 990: ersatz_perform (arg); ! 991: fill_prefetch_0 (); 1.1.1.2 root 992: return; 1.1.1.3 ! root 993: } else if ((pc & 0xF80000) == 0xF00000) { 1.1.1.2 root 994: /* User-mode STOP replacement */ 1.1.1.3 ! root 995: m68k_setstopped (1); 1.1.1.2 root 996: return; 997: } 1.1 root 998: } 1.1.1.3 ! root 999: ! 1000: if ((opcode & 0xF000) == 0xA000 && (pc & 0xF80000) == 0xF00000) { ! 1001: /* Calltrap. */ ! 1002: m68k_incpc(2); ! 1003: call_calltrap (opcode & 0xFFF); ! 1004: fill_prefetch_0 (); ! 1005: return; ! 1006: } ! 1007: 1.1 root 1008: if ((opcode & 0xF000) == 0xF000) { 1009: Exception(0xB,0); 1010: return; 1011: } 1012: if ((opcode & 0xF000) == 0xA000) { 1.1.1.3 ! root 1013: if ((pc & 0xF80000) == 0xF00000) { ! 1014: /* Calltrap. */ ! 1015: call_calltrap (opcode & 0xFFF); ! 1016: } ! 1017: Exception(0xA,0); 1.1 root 1018: return; 1019: } 1.1.1.3 ! root 1020: sprintf (warning_buffer, "Illegal instruction: %04x at %08lx\n", opcode, pc); ! 1021: write_log (warning_buffer); ! 1022: Exception (4,0); 1.1 root 1023: } 1024: 1.1.1.3 ! root 1025: void mmu_op(uae_u32 opcode, uae_u16 extra) 1.1 root 1026: { 1027: if ((extra & 0xB000) == 0) { /* PMOVE instruction */ 1028: 1029: } else if ((extra & 0xF000) == 0x2000) { /* PLOAD instruction */ 1030: } else if ((extra & 0xF000) == 0x8000) { /* PTEST instruction */ 1031: } else 1.1.1.3 ! root 1032: op_illg (opcode); 1.1 root 1033: } 1034: 1035: static int n_insns=0, n_spcinsns=0; 1036: 1.1.1.3 ! root 1037: static uaecptr last_trace_ad = 0; 1.1 root 1038: 1039: static __inline__ void do_trace(void) 1040: { 1041: if (regs.spcflags & SPCFLAG_TRACE) { /* 6 */ 1042: if (regs.t0) { 1.1.1.3 ! root 1043: uae_u16 opcode; 1.1 root 1044: /* should also include TRAP, CHK, SR modification FPcc */ 1045: /* probably never used so why bother */ 1046: /* We can afford this to be inefficient... */ 1.1.1.3 ! root 1047: m68k_setpc (m68k_getpc ()); ! 1048: fill_prefetch_0 (); ! 1049: opcode = get_word (regs.pc); 1.1 root 1050: if (opcode == 0x4e72 /* RTE */ 1051: || opcode == 0x4e74 /* RTD */ 1052: || opcode == 0x4e75 /* RTS */ 1053: || opcode == 0x4e77 /* RTR */ 1054: || opcode == 0x4e76 /* TRAPV */ 1055: || (opcode & 0xffc0) == 0x4e80 /* JSR */ 1056: || (opcode & 0xffc0) == 0x4ec0 /* JMP */ 1057: || (opcode & 0xff00) == 0x6100 /* BSR */ 1058: || ((opcode & 0xf000) == 0x6000 /* Bcc */ 1.1.1.3 ! root 1059: && cctrue((opcode >> 8) & 0xf)) 1.1 root 1060: || ((opcode & 0xf0f0) == 0x5050 /* DBcc */ 1.1.1.3 ! root 1061: && !cctrue((opcode >> 8) & 0xf) ! 1062: && (uae_s16)m68k_dreg(regs, opcode & 7) != 0)) 1.1 root 1063: { 1064: last_trace_ad = m68k_getpc(); 1065: regs.spcflags &= ~SPCFLAG_TRACE; 1066: regs.spcflags |= SPCFLAG_DOTRACE; 1067: } 1068: } else if (regs.t1) { 1069: last_trace_ad = m68k_getpc(); 1070: regs.spcflags &= ~SPCFLAG_TRACE; 1071: regs.spcflags |= SPCFLAG_DOTRACE; 1072: } 1073: } 1074: } 1075: 1.1.1.3 ! root 1076: static int do_specialties (void) 1.1 root 1077: { 1.1.1.3 ! root 1078: /*n_spcinsns++;*/ ! 1079: while (regs.spcflags & SPCFLAG_BLTNASTY) { ! 1080: do_cycles(); ! 1081: if (regs.spcflags & SPCFLAG_DISK) ! 1082: do_disk(); ! 1083: } ! 1084: run_compiled_code(); ! 1085: if (regs.spcflags & SPCFLAG_DOTRACE) { ! 1086: Exception(9,last_trace_ad); ! 1087: } ! 1088: while (regs.spcflags & SPCFLAG_STOP) { ! 1089: do_cycles(); ! 1090: if (regs.spcflags & SPCFLAG_DISK) ! 1091: do_disk(); ! 1092: if (regs.spcflags & (SPCFLAG_INT | SPCFLAG_DOINT)){ ! 1093: int intr = intlev(); ! 1094: regs.spcflags &= ~(SPCFLAG_INT | SPCFLAG_DOINT); ! 1095: if (intr != -1 && intr > regs.intmask) { ! 1096: Interrupt(intr); ! 1097: regs.stopped = 0; ! 1098: regs.spcflags &= ~SPCFLAG_STOP; 1.1.1.2 root 1099: } 1.1.1.3 ! root 1100: } ! 1101: } ! 1102: do_trace(); 1.1.1.2 root 1103: #ifdef WANT_SLOW_MULTIPLY 1.1.1.3 ! root 1104: /* Kludge for Hardwired demo. The guys who wrote it should be ! 1105: * mutilated. */ ! 1106: if (regs.spcflags & SPCFLAG_EXTRA_CYCLES) { ! 1107: do_cycles (); do_cycles (); do_cycles (); do_cycles (); ! 1108: regs.spcflags &= ~SPCFLAG_EXTRA_CYCLES; ! 1109: } 1.1.1.2 root 1110: #endif 1.1.1.3 ! root 1111: if (regs.spcflags & SPCFLAG_DISK) ! 1112: do_disk(); ! 1113: ! 1114: if (regs.spcflags & SPCFLAG_DOINT) { ! 1115: int intr = intlev(); ! 1116: regs.spcflags &= ~SPCFLAG_DOINT; ! 1117: if (intr != -1 && intr > regs.intmask) { ! 1118: Interrupt(intr); ! 1119: regs.stopped = 0; ! 1120: } ! 1121: } ! 1122: if (regs.spcflags & SPCFLAG_INT) { ! 1123: regs.spcflags &= ~SPCFLAG_INT; ! 1124: regs.spcflags |= SPCFLAG_DOINT; ! 1125: } ! 1126: if (regs.spcflags & (SPCFLAG_BRK|SPCFLAG_MODE_CHANGE)) { ! 1127: regs.spcflags &= ~(SPCFLAG_BRK|SPCFLAG_MODE_CHANGE); ! 1128: return 1; 1.1.1.2 root 1129: } 1.1.1.3 ! root 1130: return 0; 1.1.1.2 root 1131: } 1132: 1.1.1.3 ! root 1133: static void m68k_run_1(void) 1.1.1.2 root 1134: { 1.1.1.3 ! root 1135: for (;;) { ! 1136: uae_u32 opcode = get_iword(0); ! 1137: #if 0 ! 1138: if (get_ilong (0) != do_get_mem_long (®s.prefetch)) { ! 1139: debugging = 1; ! 1140: return; ! 1141: } ! 1142: #endif 1.1.1.2 root 1143: /* assert (!regs.stopped && !(regs.spcflags & SPCFLAG_STOP)); */ 1144: /* regs_backup[backup_pointer = (backup_pointer + 1) % 16] = regs;*/ 1.1.1.3 ! root 1145: #if COUNT_INSTRS == 2 ! 1146: if (table68k[opcode].handler != -1) ! 1147: instrcount[table68k[opcode].handler]++; ! 1148: #elif COUNT_INSTRS == 1 1.1.1.2 root 1149: instrcount[opcode]++; 1150: #endif 1151: #if defined(X86_ASSEMBLY) 1.1.1.3 ! root 1152: __asm__ __volatile__("\tcall *%%ebx" ! 1153: : : "b" (cpufunctbl[opcode]), "a" (opcode) ! 1154: : "%edx", "%ecx", ! 1155: "%esi", "%edi", "%ebp", "memory", "cc"); 1.1.1.2 root 1156: #else 1.1.1.3 ! root 1157: (*cpufunctbl[opcode])(opcode); 1.1.1.2 root 1158: #endif 1159: /*n_insns++;*/ 1.1.1.3 ! root 1160: do_cycles(); 1.1.1.2 root 1161: if (regs.spcflags) { 1.1.1.3 ! root 1162: if (do_specialties()) 1.1 root 1163: return; 1164: } 1165: } 1166: } 1167: 1168: #ifdef X86_ASSEMBLY 1.1.1.2 root 1169: static __inline__ void m68k_run1(void) 1.1 root 1170: { 1171: /* Work around compiler bug: GCC doesn't push %ebp in m68k_run_1. */ 1.1.1.3 ! root 1172: __asm__ __volatile__ ("pushl %%ebp\n\tcall *%0\n\tpopl %%ebp" : : "r" (m68k_run_1) : "%eax", "%edx", "%ecx", "memory", "cc"); 1.1 root 1173: } 1.1.1.2 root 1174: #else 1175: #define m68k_run1 m68k_run_1 1176: #endif 1177: 1.1.1.3 ! root 1178: int in_m68k_go = 0; 1.1 root 1179: 1180: void m68k_go(int may_quit) 1181: { 1.1.1.3 ! root 1182: if (in_m68k_go || !may_quit) { ! 1183: write_log("Bug! m68k_go is not reentrant.\n"); ! 1184: abort(); ! 1185: } ! 1186: #ifdef FRAME_RATE_HACK ! 1187: vsyncmintime = read_processor_time () + vsynctime; 1.1.1.2 root 1188: #endif 1.1.1.3 ! root 1189: in_m68k_go++; ! 1190: for (;;) { ! 1191: if (quit_program > 0) { ! 1192: if (quit_program == 1) 1.1 root 1193: break; 1.1.1.3 ! root 1194: quit_program = 0; ! 1195: m68k_reset(); 1.1 root 1196: } 1.1.1.3 ! root 1197: if (debugging) ! 1198: debug(); ! 1199: m68k_run1(); 1.1 root 1200: } 1.1.1.3 ! root 1201: in_m68k_go--; 1.1 root 1202: } 1203: 1.1.1.3 ! root 1204: static void m68k_verify(uaecptr addr, uaecptr *nextpc) 1.1 root 1205: { 1.1.1.3 ! root 1206: uae_u32 opcode, val; ! 1207: struct instr *dp; ! 1208: ! 1209: opcode = get_iword_1(0); ! 1210: last_op_for_exception_3 = opcode; ! 1211: m68kpc_offset = 2; ! 1212: ! 1213: if (cpufunctbl[opcode] == op_illg) { ! 1214: opcode = 0x4AFC; ! 1215: } ! 1216: dp = table68k + opcode; ! 1217: ! 1218: if (dp->suse) { ! 1219: if (!verify_ea (dp->sreg, dp->smode, dp->size, &val)) { ! 1220: Exception (3, 0); ! 1221: return; ! 1222: } ! 1223: } ! 1224: if (dp->duse) { ! 1225: if (!verify_ea (dp->dreg, dp->dmode, dp->size, &val)) { ! 1226: Exception (3, 0); ! 1227: return; ! 1228: } ! 1229: } ! 1230: } ! 1231: ! 1232: void m68k_disasm(uaecptr addr, uaecptr *nextpc, int cnt) ! 1233: { ! 1234: uaecptr newpc = 0; ! 1235: m68kpc_offset = addr - m68k_getpc(); 1.1 root 1236: for (;cnt--;){ 1237: char instrname[20],*ccpt; 1238: int opwords; 1.1.1.3 ! root 1239: uae_u32 opcode; 1.1 root 1240: struct mnemolookup *lookup; 1241: struct instr *dp; 1.1.1.3 ! root 1242: printf ("%08lx: ", m68k_getpc() + m68kpc_offset); ! 1243: for (opwords = 0; opwords < 5; opwords++){ ! 1244: printf ("%04x ", get_iword_1(m68kpc_offset + opwords*2)); 1.1 root 1245: } 1.1.1.3 ! root 1246: opcode = get_iword_1(m68kpc_offset); ! 1247: m68kpc_offset += 2; 1.1 root 1248: if (cpufunctbl[opcode] == op_illg) { 1249: opcode = 0x4AFC; 1250: } 1251: dp = table68k + opcode; 1252: for (lookup = lookuptab;lookup->mnemo != dp->mnemo; lookup++) 1253: ; 1.1.1.3 ! root 1254: 1.1 root 1255: strcpy(instrname,lookup->name); 1256: ccpt = strstr(instrname,"cc"); 1257: if (ccpt != 0) { 1258: strncpy(ccpt,ccnames[dp->cc],2); 1259: } 1.1.1.3 ! root 1260: printf ("%s", instrname); ! 1261: switch (dp->size){ ! 1262: case sz_byte: printf (".B "); break; ! 1263: case sz_word: printf (".W "); break; ! 1264: case sz_long: printf (".L "); break; ! 1265: default: printf (" "); break; 1.1 root 1266: } 1267: 1268: if (dp->suse) { 1.1.1.3 ! root 1269: newpc = m68k_getpc() + m68kpc_offset; ! 1270: newpc += ShowEA(dp->sreg, dp->smode, dp->size, 0); 1.1 root 1271: } 1272: if (dp->suse && dp->duse) 1.1.1.3 ! root 1273: printf (","); 1.1 root 1274: if (dp->duse) { 1.1.1.3 ! root 1275: newpc = m68k_getpc() + m68kpc_offset; ! 1276: newpc += ShowEA(dp->dreg, dp->dmode, dp->size, 0); 1.1 root 1277: } 1278: if (ccpt != 0) { 1279: if (cctrue(dp->cc)) 1.1.1.3 ! root 1280: printf (" == %08lx (TRUE)",newpc); ! 1281: else ! 1282: printf (" == %08lx (FALSE)",newpc); 1.1 root 1283: } else if ((opcode & 0xff00) == 0x6100) /* BSR */ 1.1.1.3 ! root 1284: printf (" == %08lx",newpc); ! 1285: printf ("\n"); 1.1 root 1286: } 1.1.1.3 ! root 1287: if (nextpc) *nextpc = m68k_getpc() + m68kpc_offset; 1.1 root 1288: } 1289: 1.1.1.3 ! root 1290: void m68k_dumpstate(uaecptr *nextpc) 1.1 root 1291: { 1292: int i; 1.1.1.3 ! root 1293: for (i = 0; i < 8; i++){ ! 1294: printf ("D%d: %08lx ", i, m68k_dreg(regs, i)); ! 1295: if ((i & 3) == 3) printf ("\n"); ! 1296: } ! 1297: for (i = 0; i < 8; i++){ ! 1298: printf ("A%d: %08lx ", i, m68k_areg(regs, i)); ! 1299: if ((i & 3) == 3) printf ("\n"); 1.1 root 1300: } 1.1.1.2 root 1301: if (regs.s == 0) regs.usp = m68k_areg(regs, 7); 1302: if (regs.s && regs.m) regs.msp = m68k_areg(regs, 7); 1303: if (regs.s && regs.m == 0) regs.isp = m68k_areg(regs, 7); 1.1.1.3 ! root 1304: printf ("USP=%08lx ISP=%08lx MSP=%08lx VBR=%08lx\n", 1.1 root 1305: regs.usp,regs.isp,regs.msp,regs.vbr); 1306: printf ("T=%d%d S=%d M=%d X=%d N=%d Z=%d V=%d C=%d IMASK=%d\n", 1307: regs.t1, regs.t0, regs.s, regs.m, 1308: XFLG, NFLG, ZFLG, VFLG, CFLG, regs.intmask); 1.1.1.3 ! root 1309: for (i = 0; i < 8; i++){ ! 1310: printf ("FP%d: %g ", i, regs.fp[i]); ! 1311: if ((i & 3) == 3) printf ("\n"); 1.1 root 1312: } 1.1.1.3 ! root 1313: printf ("N=%d Z=%d I=%d NAN=%d\n", 1.1 root 1314: (regs.fpsr & 0x8000000) != 0, 1315: (regs.fpsr & 0x4000000) != 0, 1316: (regs.fpsr & 0x2000000) != 0, 1317: (regs.fpsr & 0x1000000) != 0); 1.1.1.3 ! root 1318: if (currprefs.cpu_compatible) ! 1319: printf ("prefetch %08lx\n", (unsigned long)do_get_mem_long(®s.prefetch)); ! 1320: 1.1 root 1321: m68k_disasm(m68k_getpc(), nextpc, 1); 1.1.1.3 ! root 1322: if (nextpc) printf ("next PC: %08lx\n", *nextpc); 1.1 root 1323: }
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