| 1 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * |
| 2 | * Mupen64plus - r4300prof.c * |
| 3 | * Mupen64Plus homepage: http://code.google.com/p/mupen64plus/ * |
| 4 | * Copyright (C) 2008 Richard Goedeken * |
| 5 | * * |
| 6 | * This program is free software; you can redistribute it and/or modify * |
| 7 | * it under the terms of the GNU General Public License as published by * |
| 8 | * the Free Software Foundation; either version 2 of the License, or * |
| 9 | * (at your option) any later version. * |
| 10 | * * |
| 11 | * This program is distributed in the hope that it will be useful, * |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
| 14 | * GNU General Public License for more details. * |
| 15 | * * |
| 16 | * You should have received a copy of the GNU General Public License * |
| 17 | * along with this program; if not, write to the * |
| 18 | * Free Software Foundation, Inc., * |
| 19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * |
| 20 | * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ |
| 21 | |
| 22 | #include <stdio.h> |
| 23 | #include <stdlib.h> |
| 24 | #include <string.h> |
| 25 | |
| 26 | /* Global data */ |
| 27 | unsigned int instr_samples[132]; |
| 28 | char instr_name[][10] = |
| 29 | { |
| 30 | "reserved", "NI", "J", "JAL", "BEQ", "BNE", "BLEZ", "BGTZ", |
| 31 | "ADDI", "ADDIU", "SLTI", "SLTIU", "ANDI", "ORI", "XORI", "LUI", |
| 32 | "BEQL", "BNEL", "BLEZL", "BGTZL", "DADDI", "DADDIU", "LDL", "LDR", |
| 33 | "LB", "LH", "LW", "LWL", "LBU", "LHU", "LWU", "LWR", |
| 34 | "SB", "SH", "SW", "SWL", "SWR", "SDL", "SDR", "LWC1", |
| 35 | "LDC1", "LD", "LL", "SWC1", "SDC1", "SD", "SC", "BLTZ", |
| 36 | "BGEZ", "BLTZL", "BGEZL", "BLTZAL", "BGEZAL", "BLTZALL", "BGEZALL", "SLL", |
| 37 | "SRL", "SRA", "SLLV", "SRLV", "SRAV", "JR", "JALR", "SYSCALL", |
| 38 | "MFHI", "MTHI", "MFLO", "MTLO", "DSLLV", "DSRLV", "DSRAV", "MULT", |
| 39 | "MULTU", "DIV", "DIVU", "DMULT", "DMULTU", "DDIV", "DDIVU", "ADD", |
| 40 | "ADDU", "SUB", "SUBU", "AND", "OR", "XOR", "NOR", "SLT", |
| 41 | "SLTU", "DADD", "DADDU", "DSUB", "DSUBU", "DSLL", "DSRL", "DSRA", |
| 42 | "TEQ", "DSLL32", "DSRL32", "DSRA32", "BC1F", "BC1T", "BC1FL", "BC1TL", |
| 43 | "TLBWI", "TLBP", "TLBR", "TLBWR", "ERET", "MFC0", "MTC0", "MFC1", |
| 44 | "DMFC1", "CFC1", "MTC1", "DMTC1", "CTC1", "f.CVT", "f.CMP", "f.ADD", |
| 45 | "f.SUB", "f.MUL", "f.DIV", "f.SQRT", "f.ABS", "f.MOV", "f.NEG", "f.ROUND", |
| 46 | "f.TRUNC", "f.CEIL", "f.FLOOR" |
| 47 | }; |
| 48 | unsigned int instr_type[131] = { 9, 10, 6, 6, 7, 7, 7, 7, 3, 3, 4, 4, 3, 4, 4, 0, |
| 49 | 7, 7, 7, 7, 4, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 50 | 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 7, |
| 51 | 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 6, 6, 10, |
| 52 | 2, 2, 2, 2, 4, 4, 4, 3, 3, 3, 3, 4, 4, 4, 4, 3, |
| 53 | 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, |
| 54 | 8, 4, 4, 4, 7, 7, 7, 7, 10, 10, 10, 10, 8, 2, 2, 2, |
| 55 | 2, 2, 2, 2, 2, 2, 5, 5, 5, 5, 5, 5, 5, 2, 5, 5, |
| 56 | 5, 5, 5 }; |
| 57 | char instr_typename[][20] = { "Load", "Store", "Data move/convert", "32-bit math", "64-bit math", "Float Math", |
| 58 | "Jump", "Branch", "Exceptions", "Reserved", "Other" }; |
| 59 | |
| 60 | /* Global functions */ |
| 61 | int GetInstrType(int opcode); |
| 62 | int AddrCompare(const void *, const void *); |
| 63 | int ParseProfLine(const char *pchIn, long *plAddress, int *piSamples, float *pfPercentage); |
| 64 | |
| 65 | /* defined types */ |
| 66 | typedef struct __attribute__ ((__packed__)) |
| 67 | { |
| 68 | int mipsop; |
| 69 | long x86addr; |
| 70 | } r4300op; |
| 71 | |
| 72 | typedef struct |
| 73 | { |
| 74 | long x86addr; |
| 75 | int samples; |
| 76 | } profilehit; |
| 77 | |
| 78 | /* static functions */ |
| 79 | static int isSpace(char ch) |
| 80 | { |
| 81 | return (ch == ' ' || ch == '\t' ? 1 : 0); |
| 82 | } |
| 83 | |
| 84 | static int isNum(char ch) |
| 85 | { |
| 86 | return (ch >= '0' && ch <= '9' ? 1 : 0); |
| 87 | } |
| 88 | |
| 89 | static int isFloat(char ch) |
| 90 | { |
| 91 | return ((ch >= '0' && ch <= '9') || ch == '.' || ch == '+' || ch == '-' || ch == 'e' ? 1 : 0); |
| 92 | } |
| 93 | |
| 94 | static int isHex(char ch) |
| 95 | { |
| 96 | return ((ch >= '0' && ch <= '9') || ((ch & 0xdf) >= 'A' && (ch & 0xdf) <= 'F') ? 1 : 0); |
| 97 | } |
| 98 | |
| 99 | /* main */ |
| 100 | int main(int argc, void *argv[]) |
| 101 | { |
| 102 | long lOpStart, lOpEnd; |
| 103 | int flength, oplistlength, totaltime, proflistlength; |
| 104 | int samp_unknown, samp_blockend, samp_notcompiled, samp_wrappers, samp_flush; |
| 105 | int i, j; |
| 106 | FILE *pfIn; |
| 107 | r4300op *pOpAddrTable; |
| 108 | profilehit *pProfTable; |
| 109 | char *pch, *pchSampleData; |
| 110 | |
| 111 | /* check arguments */ |
| 112 | if (argc < 3) |
| 113 | { |
| 114 | printf("Usage: r4300prof r4300addr.dat x86profile.txt\n\n"); |
| 115 | printf("r4300addr.dat - binary table of r4300 opcodes and corresponding x86 starting addresses\n"); |
| 116 | printf("x86profile.txt - text file containing a list of profile sample counts by x86 address on the heap\n\n"); |
| 117 | return 1; |
| 118 | } |
| 119 | |
| 120 | /* open r4300 opcode/x86 address table generated from emulator run */ |
| 121 | printf("Loading %s...\n", argv[1]); |
| 122 | pfIn = fopen(argv[1], "rb"); |
| 123 | if (pfIn == NULL) |
| 124 | { |
| 125 | printf("Couldn't open input file: %s\n", argv[1]); |
| 126 | return 2; |
| 127 | } |
| 128 | |
| 129 | /* get file length and calculate number of r4300op table entries */ |
| 130 | fseek(pfIn, 0L, SEEK_END); |
| 131 | flength = (int) ftell(pfIn); |
| 132 | fseek(pfIn, 0L, SEEK_SET); |
| 133 | oplistlength = flength / sizeof(r4300op); |
| 134 | |
| 135 | /* read the file */ |
| 136 | pOpAddrTable = (r4300op *) malloc(flength); |
| 137 | if (pOpAddrTable == NULL) |
| 138 | { |
| 139 | printf("Failed to allocate %i bytes for OpAddrTable!\n", flength); |
| 140 | fclose(pfIn); |
| 141 | return 3; |
| 142 | } |
| 143 | fread(pOpAddrTable, 1, flength, pfIn); |
| 144 | fclose(pfIn); |
| 145 | printf("%i r4300 instruction locations read.\n", oplistlength); |
| 146 | |
| 147 | /* sort the opcode/address table according to x86addr */ |
| 148 | qsort(pOpAddrTable, oplistlength, sizeof(r4300op), AddrCompare); |
| 149 | |
| 150 | /* remove any 0-length r4300 instructions */ |
| 151 | i = 0; |
| 152 | j = 0; |
| 153 | while (i < oplistlength) |
| 154 | { |
| 155 | pOpAddrTable[j].mipsop = pOpAddrTable[i].mipsop; |
| 156 | pOpAddrTable[j].x86addr = pOpAddrTable[i].x86addr; |
| 157 | i++; |
| 158 | if (pOpAddrTable[j].x86addr != pOpAddrTable[i].x86addr) |
| 159 | j++; |
| 160 | } |
| 161 | oplistlength = j; |
| 162 | printf("%i non-empty MIPS instructions.\n", oplistlength); |
| 163 | |
| 164 | /* convert each r4300 opcode to an instruction type index */ |
| 165 | for (i = 0; i < oplistlength; i++) |
| 166 | if (pOpAddrTable[i].mipsop > 0 || pOpAddrTable[i].mipsop < -16) |
| 167 | pOpAddrTable[i].mipsop = GetInstrType(pOpAddrTable[i].mipsop); |
| 168 | |
| 169 | /* open the profiling sample data file */ |
| 170 | printf("Loading %s...\n", argv[2]); |
| 171 | pfIn = fopen(argv[2], "rb"); |
| 172 | if (pfIn == NULL) |
| 173 | { |
| 174 | printf("Couldn't open input file: %s\n", argv[2]); |
| 175 | free(pOpAddrTable); |
| 176 | return 4; |
| 177 | } |
| 178 | |
| 179 | /* load it */ |
| 180 | fseek(pfIn, 0L, SEEK_END); |
| 181 | flength = (int) ftell(pfIn); |
| 182 | fseek(pfIn, 0L, SEEK_SET); |
| 183 | pchSampleData = (char *) malloc(flength + 16); |
| 184 | if (pchSampleData == NULL) |
| 185 | { |
| 186 | printf("Failed to allocate %i bytes for pchSampleData!\n", flength + 16); |
| 187 | fclose(pfIn); |
| 188 | free(pOpAddrTable); |
| 189 | return 5; |
| 190 | } |
| 191 | fread(pchSampleData, 1, flength, pfIn); |
| 192 | pchSampleData[flength] = 0; |
| 193 | fclose(pfIn); |
| 194 | |
| 195 | /* count the number of newlines in the ascii-formatted sample data file */ |
| 196 | proflistlength = 1; |
| 197 | pch = pchSampleData; |
| 198 | while (pch = strchr(pch, '\n')) |
| 199 | { |
| 200 | proflistlength++; |
| 201 | pch++; |
| 202 | } |
| 203 | printf("%i lines in sample data file.\n", proflistlength); |
| 204 | |
| 205 | /* extract text data into binary table */ |
| 206 | pProfTable = (profilehit *) malloc(proflistlength * sizeof(profilehit)); |
| 207 | if (pProfTable == NULL) |
| 208 | { |
| 209 | printf("Failed to allocate %i bytes for pProfTable!\n", proflistlength * sizeof(profilehit)); |
| 210 | free(pOpAddrTable); |
| 211 | free(pchSampleData); |
| 212 | return 6; |
| 213 | } |
| 214 | pch = pchSampleData; |
| 215 | j = 0; |
| 216 | long long llOffset = 0; |
| 217 | while (j < proflistlength) |
| 218 | { |
| 219 | long lAddress; |
| 220 | int iSamples; |
| 221 | float fPercentage; |
| 222 | char *pchNext = strchr(pch, '\n'); |
| 223 | if (pchNext != NULL) *pchNext++ = 0; // null-terminate this line |
| 224 | if (strstr(pch, "range:0x") != NULL) // search for offset change |
| 225 | { |
| 226 | pch = strstr(pch, "range:0x") + 8; // extract hex value and update our offset |
| 227 | char *pch2 = pch; |
| 228 | while (isHex(*pch2)) pch2++; |
| 229 | *pch2 = 0; |
| 230 | llOffset = strtoll(pch, NULL, 16); |
| 231 | } |
| 232 | else // parse line for sample point |
| 233 | { |
| 234 | int rval = ParseProfLine(pch, &lAddress, &iSamples, &fPercentage); |
| 235 | if (rval != 0) |
| 236 | { |
| 237 | pProfTable[j].x86addr = (unsigned long) (lAddress + llOffset); |
| 238 | pProfTable[j].samples = iSamples; |
| 239 | j++; |
| 240 | } |
| 241 | } |
| 242 | pch = pchNext; |
| 243 | if (pch == NULL) break; |
| 244 | } |
| 245 | free(pchSampleData); |
| 246 | proflistlength = j; |
| 247 | printf("Found %i profile hits.\n", proflistlength); |
| 248 | |
| 249 | /* clear r4300 instruction sample data table */ |
| 250 | for (i = 0; i < 132; i++) |
| 251 | instr_samples[i] = 0; |
| 252 | |
| 253 | /* calculate r4300 instruction profiling data by merging the tables */ |
| 254 | samp_unknown = 0; |
| 255 | samp_blockend = 0; |
| 256 | samp_notcompiled = 0; |
| 257 | samp_wrappers = 0; |
| 258 | samp_flush = 0; |
| 259 | i = 0; // i == OpAddrTable index |
| 260 | lOpStart = pOpAddrTable[0].x86addr; |
| 261 | lOpEnd = pOpAddrTable[1].x86addr; |
| 262 | for (j = 0; j < proflistlength; j++) // j == pProfTable index |
| 263 | { |
| 264 | long lOpx86addr = pProfTable[j].x86addr; |
| 265 | if (lOpx86addr >= lOpStart && lOpx86addr <= lOpEnd) /* these profile samples lie within current r4300 instruction */ |
| 266 | { |
| 267 | int instr = pOpAddrTable[i].mipsop; |
| 268 | if (instr == -1) printf("%lx sample point lies between %i/%lx and %i/%lx\n", lOpx86addr, instr, lOpStart, pOpAddrTable[i+1].mipsop, lOpEnd); |
| 269 | |
| 270 | if (instr == -1) |
| 271 | samp_unknown += pProfTable[j].samples; |
| 272 | else if (instr == -2) |
| 273 | samp_notcompiled += pProfTable[j].samples; |
| 274 | else if (instr == -3) |
| 275 | samp_blockend += pProfTable[j].samples; |
| 276 | else if (instr == -4) |
| 277 | samp_wrappers += pProfTable[j].samples; |
| 278 | else if (instr == -5) |
| 279 | samp_flush += pProfTable[j].samples; |
| 280 | else |
| 281 | instr_samples[instr] += pProfTable[j].samples; |
| 282 | continue; |
| 283 | } |
| 284 | if (lOpx86addr < pOpAddrTable[0].x86addr || lOpx86addr >= pOpAddrTable[oplistlength-1].x86addr) |
| 285 | { /* outside the range of all recompiled instructions */ |
| 286 | samp_unknown += pProfTable[j].samples; |
| 287 | continue; |
| 288 | } |
| 289 | if (lOpx86addr < lOpStart) /* discontinuity in profile list, go back to start */ |
| 290 | { |
| 291 | i = 0; |
| 292 | lOpStart = pOpAddrTable[0].x86addr; |
| 293 | lOpEnd = pOpAddrTable[1].x86addr; |
| 294 | j--; |
| 295 | continue; |
| 296 | } |
| 297 | /* this profile point is ahead of current r4300 instruction */ |
| 298 | do /* race ahead in r4300 opcode list until we hit this profile sample point */ |
| 299 | { |
| 300 | i++; |
| 301 | } while (i+1 < oplistlength && lOpx86addr > pOpAddrTable[i+1].x86addr); |
| 302 | lOpStart = pOpAddrTable[i].x86addr; |
| 303 | lOpEnd = pOpAddrTable[i+1].x86addr; |
| 304 | if (lOpx86addr < lOpStart || lOpx86addr > lOpEnd) |
| 305 | { |
| 306 | printf("Error: lOpx86addr = %lx but lOpStart, lOpEnd = %lx, %lx\n", lOpx86addr, lOpStart, lOpEnd); |
| 307 | return 7; |
| 308 | } |
| 309 | /* we have found the correct r4300 instruction corresponding to this profile point */ |
| 310 | j--; |
| 311 | } |
| 312 | |
| 313 | /* print the results */ |
| 314 | unsigned int iTypeCount[11] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; |
| 315 | printf("\nInstruction time (samples):\n"); |
| 316 | totaltime = 0; |
| 317 | for (i = 0; i < 131; i++) |
| 318 | { |
| 319 | printf("%8s: %08i ", instr_name[i], instr_samples[i]); |
| 320 | if (i % 5 == 4) printf("\n"); |
| 321 | iTypeCount[instr_type[i]] += instr_samples[i]; |
| 322 | totaltime += instr_samples[i]; |
| 323 | } |
| 324 | int special = samp_flush + samp_wrappers + samp_notcompiled + samp_blockend; |
| 325 | printf("\n\nSpecial code samples:\n"); |
| 326 | printf(" Regcache flushing: %i\n", samp_flush); |
| 327 | printf(" Jump wrappers: %i\n", samp_wrappers); |
| 328 | printf(" NOTCOMPILED: %i\n", samp_notcompiled); |
| 329 | printf(" block postfix & link samples: %i\n", samp_blockend); |
| 330 | |
| 331 | printf("\nUnaccounted samples: %i\n", samp_unknown); |
| 332 | printf("Total accounted instruction samples: %i\n", totaltime + special); |
| 333 | for (i = 0; i < 11; i++) |
| 334 | { |
| 335 | printf("%20s: %04.1f%% (%i)\n", instr_typename[i], (float) iTypeCount[i] * 100.0 / totaltime, iTypeCount[i]); |
| 336 | } |
| 337 | |
| 338 | free(pOpAddrTable); |
| 339 | free(pProfTable); |
| 340 | return 0; |
| 341 | } |
| 342 | |
| 343 | int AddrCompare(const void *p1, const void *p2) |
| 344 | { |
| 345 | const r4300op *pOp1 = (const r4300op *) p1; |
| 346 | const r4300op *pOp2 = (const r4300op *) p2; |
| 347 | |
| 348 | if (pOp1->x86addr < pOp2->x86addr) |
| 349 | return -1; |
| 350 | else if (pOp1->x86addr == pOp2->x86addr) |
| 351 | return (int) (pOp1 - pOp2); /* this forces qsort to be stable */ |
| 352 | else |
| 353 | return 1; |
| 354 | } |
| 355 | |
| 356 | int ParseProfLine(const char *pchIn, long *plAddress, int *piSamples, float *pfPercentage) |
| 357 | { |
| 358 | char chVal[128], *pchOut; |
| 359 | |
| 360 | /* skip any initial whitespace */ |
| 361 | while (isSpace(*pchIn)) pchIn++; |
| 362 | if (!isHex(*pchIn)) return 0; |
| 363 | |
| 364 | /* parse hexadecimal address value */ |
| 365 | pchOut = chVal; |
| 366 | while (isHex(*pchIn)) *pchOut++ = *pchIn++; |
| 367 | *pchOut = 0; |
| 368 | if (!isSpace(*pchIn)) return 0; |
| 369 | *plAddress = strtol(chVal, NULL, 16); |
| 370 | |
| 371 | /* skip more whitespace */ |
| 372 | while (isSpace(*pchIn)) pchIn++; |
| 373 | if (!isNum(*pchIn)) return 0; |
| 374 | |
| 375 | /* parse decimal sample count value */ |
| 376 | pchOut = chVal; |
| 377 | while (isNum(*pchIn)) *pchOut++ = *pchIn++; |
| 378 | *pchOut = 0; |
| 379 | if (!isSpace(*pchIn)) return 0; |
| 380 | *piSamples = atoi(chVal); |
| 381 | |
| 382 | /* skip more whitespace */ |
| 383 | while (isSpace(*pchIn)) pchIn++; |
| 384 | if (!isFloat(*pchIn)) return 0; |
| 385 | |
| 386 | /* parse floating-point percentage value */ |
| 387 | pchOut = chVal; |
| 388 | while (isFloat(*pchIn)) *pchOut++ = *pchIn++; |
| 389 | *pchOut = 0; |
| 390 | if (!isSpace(*pchIn) && *pchIn != '\r' && *pchIn != '\n' && *pchIn != 0) return 0; |
| 391 | *pfPercentage = atof(chVal); |
| 392 | |
| 393 | /* if this isn't the end of the line, it's not a valid sample point */ |
| 394 | while (isSpace(*pchIn)) pchIn++; |
| 395 | if (*pchIn != '\r' && *pchIn != '\n' && *pchIn != 0) return 0; |
| 396 | |
| 397 | return 1; |
| 398 | } |
| 399 | |
| 400 | static int InstrTypeStd[64] = |
| 401 | { |
| 402 | -1, -1, 02, 03, 04, 05, 06, 07, 8, 9, 10, 11, 12, 13, 14, 15, |
| 403 | -1, -1, 00, 00, 16, 17, 18, 19, 20, 21, 22, 23, 00, 00, 00, 00, |
| 404 | 24, 25, 27, 26, 28, 29, 31, 30, 32, 33, 35, 34, 37, 38, 36, 01, |
| 405 | 42, 39, 00, 00, 01, 40, 00, 41, 46, 43, 00, 00, 01, 44, 00, 45 |
| 406 | }; |
| 407 | |
| 408 | static int InstrTypeSpecial[64] = |
| 409 | { |
| 410 | 55, 00, 56, 57, 58, 00, 59, 60, |
| 411 | 61, 62, 00, 00, 63, 01, 00, 00, |
| 412 | 64, 65, 66, 67, 68, 00, 69, 70, |
| 413 | 71, 72, 73, 74, 75, 76, 77, 78, |
| 414 | 79, 80, 81, 82, 83, 84, 85, 86, |
| 415 | 00, 00, 87, 88, 89, 90, 91, 92, |
| 416 | 01, 01, 01, 01, 96, 00, 01, 00, |
| 417 | 93, 00, 94, 95, 97, 00, 98, 99 |
| 418 | }; |
| 419 | |
| 420 | static int InstrTypeRegImm[32] = |
| 421 | { |
| 422 | 47, 48, 49, 50, 00, 00, 00, 00, 01, 01, 01, 01, 01, 00, 01, 00, |
| 423 | 51, 52, 53, 54, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00 |
| 424 | }; |
| 425 | |
| 426 | static int InstrTypeCop1[32] = |
| 427 | { |
| 428 | 111, 112, 113, 00, 114, 115, 116, 00, |
| 429 | -1, 00, 00, 00, 00, 00, 00, 00, |
| 430 | -1, -1, 00, 00, -1, -1, 00, 00, |
| 431 | 00, 00, 00, 00, 00, 00, 00, 00 |
| 432 | }; |
| 433 | |
| 434 | static int InstrTypeCop1Math[64] = |
| 435 | { |
| 436 | 119, 120, 121, 122, 123, 124, 125, 126, |
| 437 | 127, 128, 129, 130, 127, 128, 129, 130, |
| 438 | 00, 00, 00, 00, 00, 00, 00, 00, |
| 439 | 00, 00, 00, 00, 00, 00, 00, 00, |
| 440 | 117, 117, 00, 00, 117, 117, 00, 00, |
| 441 | 00, 00, 00, 00, 00, 00, 00, 00, |
| 442 | 118, 118, 118, 118, 118, 118, 118, 118, |
| 443 | 118, 118, 118, 118, 118, 118, 118, 118 |
| 444 | }; |
| 445 | |
| 446 | |
| 447 | int GetInstrType(int opcode) |
| 448 | { |
| 449 | int iType = (opcode >> 26) & 63; |
| 450 | |
| 451 | if (iType == 0) |
| 452 | { |
| 453 | /* SPECIAL instruction */ |
| 454 | iType = opcode & 63; |
| 455 | return InstrTypeSpecial[iType]; |
| 456 | } |
| 457 | else if (iType == 1) |
| 458 | { |
| 459 | /* REGIMM instruction */ |
| 460 | iType = (opcode >> 16) & 31; |
| 461 | return InstrTypeRegImm[iType]; |
| 462 | } |
| 463 | else if (iType == 16) |
| 464 | { |
| 465 | /* COP0 instruction */ |
| 466 | int iType1 = opcode & 0x01FFFFFF; |
| 467 | int iType2 = (opcode >> 21) & 31; |
| 468 | if (iType1 == 1) |
| 469 | return 106; // TLBR |
| 470 | else if (iType1 == 2) |
| 471 | return 104; // TLBWI |
| 472 | else if (iType1 == 6) |
| 473 | return 107; // TLBWR |
| 474 | else if (iType1 == 8) |
| 475 | return 105; // TLBP |
| 476 | else if (iType1 == 24) |
| 477 | return 108; // ERET |
| 478 | else if ((opcode & 0x7FF) == 0 && iType2 == 0) |
| 479 | return 109; // MFC0 |
| 480 | else if ((opcode & 0x7FF) == 0 && iType2 == 4) |
| 481 | return 110; // MTC0 |
| 482 | else |
| 483 | return 0; // reserved |
| 484 | } |
| 485 | else if (iType == 17) |
| 486 | { |
| 487 | /* COP1 instruction */ |
| 488 | int iType1 = (opcode >> 21) & 31; |
| 489 | if (iType1 == 8) |
| 490 | { |
| 491 | /* conditional branch */ |
| 492 | int iType2 = (opcode >> 16) & 31; |
| 493 | if (iType2 == 0) |
| 494 | return 100; // BC1F |
| 495 | else if (iType2 == 1) |
| 496 | return 101; // BC1T |
| 497 | else if (iType2 == 2) |
| 498 | return 102; // BC1FL |
| 499 | else if (iType2 == 3) |
| 500 | return 103; // BC1TL |
| 501 | else |
| 502 | return 0; // reserved |
| 503 | } |
| 504 | else if (iType1 == 16 || iType1 == 17 || iType1 == 20 || iType1 == 21) |
| 505 | { |
| 506 | /* Single, Double, Word, Long instructions */ |
| 507 | int iType2 = opcode & 63; |
| 508 | return InstrTypeCop1Math[iType2]; |
| 509 | } |
| 510 | else |
| 511 | { |
| 512 | /* other Cop1 (move) */ |
| 513 | return InstrTypeCop1[iType1]; |
| 514 | } |
| 515 | } |
| 516 | |
| 517 | /* standard MIPS instruction */ |
| 518 | return InstrTypeStd[iType]; |
| 519 | } |
| 520 | |