| 1 | /* LzFind.c -- Match finder for LZ algorithms |
| 2 | 2024-03-01 : Igor Pavlov : Public domain */ |
| 3 | |
| 4 | #include "Precomp.h" |
| 5 | |
| 6 | #include <string.h> |
| 7 | // #include <stdio.h> |
| 8 | |
| 9 | #include "CpuArch.h" |
| 10 | #include "LzFind.h" |
| 11 | #include "LzHash.h" |
| 12 | |
| 13 | #define kBlockMoveAlign (1 << 7) // alignment for memmove() |
| 14 | #define kBlockSizeAlign (1 << 16) // alignment for block allocation |
| 15 | #define kBlockSizeReserveMin (1 << 24) // it's 1/256 from 4 GB dictinary |
| 16 | |
| 17 | #define kEmptyHashValue 0 |
| 18 | |
| 19 | #define kMaxValForNormalize ((UInt32)0) |
| 20 | // #define kMaxValForNormalize ((UInt32)(1 << 20) + 0xfff) // for debug |
| 21 | |
| 22 | // #define kNormalizeAlign (1 << 7) // alignment for speculated accesses |
| 23 | |
| 24 | #define GET_AVAIL_BYTES(p) \ |
| 25 | Inline_MatchFinder_GetNumAvailableBytes(p) |
| 26 | |
| 27 | |
| 28 | // #define kFix5HashSize (kHash2Size + kHash3Size + kHash4Size) |
| 29 | #define kFix5HashSize kFix4HashSize |
| 30 | |
| 31 | /* |
| 32 | HASH2_CALC: |
| 33 | if (hv) match, then cur[0] and cur[1] also match |
| 34 | */ |
| 35 | #define HASH2_CALC hv = GetUi16(cur); |
| 36 | |
| 37 | // (crc[0 ... 255] & 0xFF) provides one-to-one correspondence to [0 ... 255] |
| 38 | |
| 39 | /* |
| 40 | HASH3_CALC: |
| 41 | if (cur[0]) and (h2) match, then cur[1] also match |
| 42 | if (cur[0]) and (hv) match, then cur[1] and cur[2] also match |
| 43 | */ |
| 44 | #define HASH3_CALC { \ |
| 45 | UInt32 temp = p->crc[cur[0]] ^ cur[1]; \ |
| 46 | h2 = temp & (kHash2Size - 1); \ |
| 47 | hv = (temp ^ ((UInt32)cur[2] << 8)) & p->hashMask; } |
| 48 | |
| 49 | #define HASH4_CALC { \ |
| 50 | UInt32 temp = p->crc[cur[0]] ^ cur[1]; \ |
| 51 | h2 = temp & (kHash2Size - 1); \ |
| 52 | temp ^= ((UInt32)cur[2] << 8); \ |
| 53 | h3 = temp & (kHash3Size - 1); \ |
| 54 | hv = (temp ^ (p->crc[cur[3]] << kLzHash_CrcShift_1)) & p->hashMask; } |
| 55 | |
| 56 | #define HASH5_CALC { \ |
| 57 | UInt32 temp = p->crc[cur[0]] ^ cur[1]; \ |
| 58 | h2 = temp & (kHash2Size - 1); \ |
| 59 | temp ^= ((UInt32)cur[2] << 8); \ |
| 60 | h3 = temp & (kHash3Size - 1); \ |
| 61 | temp ^= (p->crc[cur[3]] << kLzHash_CrcShift_1); \ |
| 62 | /* h4 = temp & p->hash4Mask; */ /* (kHash4Size - 1); */ \ |
| 63 | hv = (temp ^ (p->crc[cur[4]] << kLzHash_CrcShift_2)) & p->hashMask; } |
| 64 | |
| 65 | #define HASH_ZIP_CALC hv = ((cur[2] | ((UInt32)cur[0] << 8)) ^ p->crc[cur[1]]) & 0xFFFF; |
| 66 | |
| 67 | |
| 68 | static void LzInWindow_Free(CMatchFinder *p, ISzAllocPtr alloc) |
| 69 | { |
| 70 | // if (!p->directInput) |
| 71 | { |
| 72 | ISzAlloc_Free(alloc, p->bufBase); |
| 73 | p->bufBase = NULL; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | |
| 78 | static int LzInWindow_Create2(CMatchFinder *p, UInt32 blockSize, ISzAllocPtr alloc) |
| 79 | { |
| 80 | if (blockSize == 0) |
| 81 | return 0; |
| 82 | if (!p->bufBase || p->blockSize != blockSize) |
| 83 | { |
| 84 | // size_t blockSizeT; |
| 85 | LzInWindow_Free(p, alloc); |
| 86 | p->blockSize = blockSize; |
| 87 | // blockSizeT = blockSize; |
| 88 | |
| 89 | // printf("\nblockSize = 0x%x\n", blockSize); |
| 90 | /* |
| 91 | #if defined _WIN64 |
| 92 | // we can allocate 4GiB, but still use UInt32 for (p->blockSize) |
| 93 | // we use UInt32 type for (p->blockSize), because |
| 94 | // we don't want to wrap over 4 GiB, |
| 95 | // when we use (p->streamPos - p->pos) that is UInt32. |
| 96 | if (blockSize >= (UInt32)0 - (UInt32)kBlockSizeAlign) |
| 97 | { |
| 98 | blockSizeT = ((size_t)1 << 32); |
| 99 | printf("\nchanged to blockSizeT = 4GiB\n"); |
| 100 | } |
| 101 | #endif |
| 102 | */ |
| 103 | |
| 104 | p->bufBase = (Byte *)ISzAlloc_Alloc(alloc, blockSize); |
| 105 | // printf("\nbufferBase = %p\n", p->bufBase); |
| 106 | // return 0; // for debug |
| 107 | } |
| 108 | return (p->bufBase != NULL); |
| 109 | } |
| 110 | |
| 111 | static const Byte *MatchFinder_GetPointerToCurrentPos(void *p) |
| 112 | { |
| 113 | return ((CMatchFinder *)p)->buffer; |
| 114 | } |
| 115 | |
| 116 | static UInt32 MatchFinder_GetNumAvailableBytes(void *p) |
| 117 | { |
| 118 | return GET_AVAIL_BYTES((CMatchFinder *)p); |
| 119 | } |
| 120 | |
| 121 | |
| 122 | Z7_NO_INLINE |
| 123 | static void MatchFinder_ReadBlock(CMatchFinder *p) |
| 124 | { |
| 125 | if (p->streamEndWasReached || p->result != SZ_OK) |
| 126 | return; |
| 127 | |
| 128 | /* We use (p->streamPos - p->pos) value. |
| 129 | (p->streamPos < p->pos) is allowed. */ |
| 130 | |
| 131 | if (p->directInput) |
| 132 | { |
| 133 | UInt32 curSize = 0xFFFFFFFF - GET_AVAIL_BYTES(p); |
| 134 | if (curSize > p->directInputRem) |
| 135 | curSize = (UInt32)p->directInputRem; |
| 136 | p->streamPos += curSize; |
| 137 | p->directInputRem -= curSize; |
| 138 | if (p->directInputRem == 0) |
| 139 | p->streamEndWasReached = 1; |
| 140 | return; |
| 141 | } |
| 142 | |
| 143 | for (;;) |
| 144 | { |
| 145 | const Byte *dest = p->buffer + GET_AVAIL_BYTES(p); |
| 146 | size_t size = (size_t)(p->bufBase + p->blockSize - dest); |
| 147 | if (size == 0) |
| 148 | { |
| 149 | /* we call ReadBlock() after NeedMove() and MoveBlock(). |
| 150 | NeedMove() and MoveBlock() povide more than (keepSizeAfter) |
| 151 | to the end of (blockSize). |
| 152 | So we don't execute this branch in normal code flow. |
| 153 | We can go here, if we will call ReadBlock() before NeedMove(), MoveBlock(). |
| 154 | */ |
| 155 | // p->result = SZ_ERROR_FAIL; // we can show error here |
| 156 | return; |
| 157 | } |
| 158 | |
| 159 | // #define kRead 3 |
| 160 | // if (size > kRead) size = kRead; // for debug |
| 161 | |
| 162 | /* |
| 163 | // we need cast (Byte *)dest. |
| 164 | #ifdef __clang__ |
| 165 | #pragma GCC diagnostic ignored "-Wcast-qual" |
| 166 | #endif |
| 167 | */ |
| 168 | p->result = ISeqInStream_Read(p->stream, |
| 169 | p->bufBase + (dest - p->bufBase), &size); |
| 170 | if (p->result != SZ_OK) |
| 171 | return; |
| 172 | if (size == 0) |
| 173 | { |
| 174 | p->streamEndWasReached = 1; |
| 175 | return; |
| 176 | } |
| 177 | p->streamPos += (UInt32)size; |
| 178 | if (GET_AVAIL_BYTES(p) > p->keepSizeAfter) |
| 179 | return; |
| 180 | /* here and in another (p->keepSizeAfter) checks we keep on 1 byte more than was requested by Create() function |
| 181 | (GET_AVAIL_BYTES(p) >= p->keepSizeAfter) - minimal required size */ |
| 182 | } |
| 183 | |
| 184 | // on exit: (p->result != SZ_OK || p->streamEndWasReached || GET_AVAIL_BYTES(p) > p->keepSizeAfter) |
| 185 | } |
| 186 | |
| 187 | |
| 188 | |
| 189 | Z7_NO_INLINE |
| 190 | void MatchFinder_MoveBlock(CMatchFinder *p) |
| 191 | { |
| 192 | const size_t offset = (size_t)(p->buffer - p->bufBase) - p->keepSizeBefore; |
| 193 | const size_t keepBefore = (offset & (kBlockMoveAlign - 1)) + p->keepSizeBefore; |
| 194 | p->buffer = p->bufBase + keepBefore; |
| 195 | memmove(p->bufBase, |
| 196 | p->bufBase + (offset & ~((size_t)kBlockMoveAlign - 1)), |
| 197 | keepBefore + (size_t)GET_AVAIL_BYTES(p)); |
| 198 | } |
| 199 | |
| 200 | /* We call MoveBlock() before ReadBlock(). |
| 201 | So MoveBlock() can be wasteful operation, if the whole input data |
| 202 | can fit in current block even without calling MoveBlock(). |
| 203 | in important case where (dataSize <= historySize) |
| 204 | condition (p->blockSize > dataSize + p->keepSizeAfter) is met |
| 205 | So there is no MoveBlock() in that case case. |
| 206 | */ |
| 207 | |
| 208 | int MatchFinder_NeedMove(CMatchFinder *p) |
| 209 | { |
| 210 | if (p->directInput) |
| 211 | return 0; |
| 212 | if (p->streamEndWasReached || p->result != SZ_OK) |
| 213 | return 0; |
| 214 | return ((size_t)(p->bufBase + p->blockSize - p->buffer) <= p->keepSizeAfter); |
| 215 | } |
| 216 | |
| 217 | void MatchFinder_ReadIfRequired(CMatchFinder *p) |
| 218 | { |
| 219 | if (p->keepSizeAfter >= GET_AVAIL_BYTES(p)) |
| 220 | MatchFinder_ReadBlock(p); |
| 221 | } |
| 222 | |
| 223 | |
| 224 | |
| 225 | static void MatchFinder_SetDefaultSettings(CMatchFinder *p) |
| 226 | { |
| 227 | p->cutValue = 32; |
| 228 | p->btMode = 1; |
| 229 | p->numHashBytes = 4; |
| 230 | p->numHashBytes_Min = 2; |
| 231 | p->numHashOutBits = 0; |
| 232 | p->bigHash = 0; |
| 233 | } |
| 234 | |
| 235 | #define kCrcPoly 0xEDB88320 |
| 236 | |
| 237 | void MatchFinder_Construct(CMatchFinder *p) |
| 238 | { |
| 239 | unsigned i; |
| 240 | p->buffer = NULL; |
| 241 | p->bufBase = NULL; |
| 242 | p->directInput = 0; |
| 243 | p->stream = NULL; |
| 244 | p->hash = NULL; |
| 245 | p->expectedDataSize = (UInt64)(Int64)-1; |
| 246 | MatchFinder_SetDefaultSettings(p); |
| 247 | |
| 248 | for (i = 0; i < 256; i++) |
| 249 | { |
| 250 | UInt32 r = (UInt32)i; |
| 251 | unsigned j; |
| 252 | for (j = 0; j < 8; j++) |
| 253 | r = (r >> 1) ^ (kCrcPoly & ((UInt32)0 - (r & 1))); |
| 254 | p->crc[i] = r; |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | #undef kCrcPoly |
| 259 | |
| 260 | static void MatchFinder_FreeThisClassMemory(CMatchFinder *p, ISzAllocPtr alloc) |
| 261 | { |
| 262 | ISzAlloc_Free(alloc, p->hash); |
| 263 | p->hash = NULL; |
| 264 | } |
| 265 | |
| 266 | void MatchFinder_Free(CMatchFinder *p, ISzAllocPtr alloc) |
| 267 | { |
| 268 | MatchFinder_FreeThisClassMemory(p, alloc); |
| 269 | LzInWindow_Free(p, alloc); |
| 270 | } |
| 271 | |
| 272 | static CLzRef* AllocRefs(size_t num, ISzAllocPtr alloc) |
| 273 | { |
| 274 | const size_t sizeInBytes = (size_t)num * sizeof(CLzRef); |
| 275 | if (sizeInBytes / sizeof(CLzRef) != num) |
| 276 | return NULL; |
| 277 | return (CLzRef *)ISzAlloc_Alloc(alloc, sizeInBytes); |
| 278 | } |
| 279 | |
| 280 | #if (kBlockSizeReserveMin < kBlockSizeAlign * 2) |
| 281 | #error Stop_Compiling_Bad_Reserve |
| 282 | #endif |
| 283 | |
| 284 | |
| 285 | |
| 286 | static UInt32 GetBlockSize(CMatchFinder *p, UInt32 historySize) |
| 287 | { |
| 288 | UInt32 blockSize = (p->keepSizeBefore + p->keepSizeAfter); |
| 289 | /* |
| 290 | if (historySize > kMaxHistorySize) |
| 291 | return 0; |
| 292 | */ |
| 293 | // printf("\nhistorySize == 0x%x\n", historySize); |
| 294 | |
| 295 | if (p->keepSizeBefore < historySize || blockSize < p->keepSizeBefore) // if 32-bit overflow |
| 296 | return 0; |
| 297 | |
| 298 | { |
| 299 | const UInt32 kBlockSizeMax = (UInt32)0 - (UInt32)kBlockSizeAlign; |
| 300 | const UInt32 rem = kBlockSizeMax - blockSize; |
| 301 | const UInt32 reserve = (blockSize >> (blockSize < ((UInt32)1 << 30) ? 1 : 2)) |
| 302 | + (1 << 12) + kBlockMoveAlign + kBlockSizeAlign; // do not overflow 32-bit here |
| 303 | if (blockSize >= kBlockSizeMax |
| 304 | || rem < kBlockSizeReserveMin) // we reject settings that will be slow |
| 305 | return 0; |
| 306 | if (reserve >= rem) |
| 307 | blockSize = kBlockSizeMax; |
| 308 | else |
| 309 | { |
| 310 | blockSize += reserve; |
| 311 | blockSize &= ~(UInt32)(kBlockSizeAlign - 1); |
| 312 | } |
| 313 | } |
| 314 | // printf("\n LzFind_blockSize = %x\n", blockSize); |
| 315 | // printf("\n LzFind_blockSize = %d\n", blockSize >> 20); |
| 316 | return blockSize; |
| 317 | } |
| 318 | |
| 319 | |
| 320 | // input is historySize |
| 321 | static UInt32 MatchFinder_GetHashMask2(CMatchFinder *p, UInt32 hs) |
| 322 | { |
| 323 | if (p->numHashBytes == 2) |
| 324 | return (1 << 16) - 1; |
| 325 | if (hs != 0) |
| 326 | hs--; |
| 327 | hs |= (hs >> 1); |
| 328 | hs |= (hs >> 2); |
| 329 | hs |= (hs >> 4); |
| 330 | hs |= (hs >> 8); |
| 331 | // we propagated 16 bits in (hs). Low 16 bits must be set later |
| 332 | if (hs >= (1 << 24)) |
| 333 | { |
| 334 | if (p->numHashBytes == 3) |
| 335 | hs = (1 << 24) - 1; |
| 336 | /* if (bigHash) mode, GetHeads4b() in LzFindMt.c needs (hs >= ((1 << 24) - 1))) */ |
| 337 | } |
| 338 | // (hash_size >= (1 << 16)) : Required for (numHashBytes > 2) |
| 339 | hs |= (1 << 16) - 1; /* don't change it! */ |
| 340 | // bt5: we adjust the size with recommended minimum size |
| 341 | if (p->numHashBytes >= 5) |
| 342 | hs |= (256 << kLzHash_CrcShift_2) - 1; |
| 343 | return hs; |
| 344 | } |
| 345 | |
| 346 | // input is historySize |
| 347 | static UInt32 MatchFinder_GetHashMask(CMatchFinder *p, UInt32 hs) |
| 348 | { |
| 349 | if (p->numHashBytes == 2) |
| 350 | return (1 << 16) - 1; |
| 351 | if (hs != 0) |
| 352 | hs--; |
| 353 | hs |= (hs >> 1); |
| 354 | hs |= (hs >> 2); |
| 355 | hs |= (hs >> 4); |
| 356 | hs |= (hs >> 8); |
| 357 | // we propagated 16 bits in (hs). Low 16 bits must be set later |
| 358 | hs >>= 1; |
| 359 | if (hs >= (1 << 24)) |
| 360 | { |
| 361 | if (p->numHashBytes == 3) |
| 362 | hs = (1 << 24) - 1; |
| 363 | else |
| 364 | hs >>= 1; |
| 365 | /* if (bigHash) mode, GetHeads4b() in LzFindMt.c needs (hs >= ((1 << 24) - 1))) */ |
| 366 | } |
| 367 | // (hash_size >= (1 << 16)) : Required for (numHashBytes > 2) |
| 368 | hs |= (1 << 16) - 1; /* don't change it! */ |
| 369 | // bt5: we adjust the size with recommended minimum size |
| 370 | if (p->numHashBytes >= 5) |
| 371 | hs |= (256 << kLzHash_CrcShift_2) - 1; |
| 372 | return hs; |
| 373 | } |
| 374 | |
| 375 | |
| 376 | int MatchFinder_Create(CMatchFinder *p, UInt32 historySize, |
| 377 | UInt32 keepAddBufferBefore, UInt32 matchMaxLen, UInt32 keepAddBufferAfter, |
| 378 | ISzAllocPtr alloc) |
| 379 | { |
| 380 | /* we need one additional byte in (p->keepSizeBefore), |
| 381 | since we use MoveBlock() after (p->pos++) and before dictionary using */ |
| 382 | // keepAddBufferBefore = (UInt32)0xFFFFFFFF - (1 << 22); // for debug |
| 383 | p->keepSizeBefore = historySize + keepAddBufferBefore + 1; |
| 384 | |
| 385 | keepAddBufferAfter += matchMaxLen; |
| 386 | /* we need (p->keepSizeAfter >= p->numHashBytes) */ |
| 387 | if (keepAddBufferAfter < p->numHashBytes) |
| 388 | keepAddBufferAfter = p->numHashBytes; |
| 389 | // keepAddBufferAfter -= 2; // for debug |
| 390 | p->keepSizeAfter = keepAddBufferAfter; |
| 391 | |
| 392 | if (p->directInput) |
| 393 | p->blockSize = 0; |
| 394 | if (p->directInput || LzInWindow_Create2(p, GetBlockSize(p, historySize), alloc)) |
| 395 | { |
| 396 | size_t hashSizeSum; |
| 397 | { |
| 398 | UInt32 hs; |
| 399 | UInt32 hsCur; |
| 400 | |
| 401 | if (p->numHashOutBits != 0) |
| 402 | { |
| 403 | unsigned numBits = p->numHashOutBits; |
| 404 | const unsigned nbMax = |
| 405 | (p->numHashBytes == 2 ? 16 : |
| 406 | (p->numHashBytes == 3 ? 24 : 32)); |
| 407 | if (numBits > nbMax) |
| 408 | numBits = nbMax; |
| 409 | if (numBits >= 32) |
| 410 | hs = (UInt32)0 - 1; |
| 411 | else |
| 412 | hs = ((UInt32)1 << numBits) - 1; |
| 413 | // (hash_size >= (1 << 16)) : Required for (numHashBytes > 2) |
| 414 | hs |= (1 << 16) - 1; /* don't change it! */ |
| 415 | if (p->numHashBytes >= 5) |
| 416 | hs |= (256 << kLzHash_CrcShift_2) - 1; |
| 417 | { |
| 418 | const UInt32 hs2 = MatchFinder_GetHashMask2(p, historySize); |
| 419 | if (hs > hs2) |
| 420 | hs = hs2; |
| 421 | } |
| 422 | hsCur = hs; |
| 423 | if (p->expectedDataSize < historySize) |
| 424 | { |
| 425 | const UInt32 hs2 = MatchFinder_GetHashMask2(p, (UInt32)p->expectedDataSize); |
| 426 | if (hsCur > hs2) |
| 427 | hsCur = hs2; |
| 428 | } |
| 429 | } |
| 430 | else |
| 431 | { |
| 432 | hs = MatchFinder_GetHashMask(p, historySize); |
| 433 | hsCur = hs; |
| 434 | if (p->expectedDataSize < historySize) |
| 435 | { |
| 436 | hsCur = MatchFinder_GetHashMask(p, (UInt32)p->expectedDataSize); |
| 437 | if (hsCur > hs) // is it possible? |
| 438 | hsCur = hs; |
| 439 | } |
| 440 | } |
| 441 | |
| 442 | p->hashMask = hsCur; |
| 443 | |
| 444 | hashSizeSum = hs; |
| 445 | hashSizeSum++; |
| 446 | if (hashSizeSum < hs) |
| 447 | return 0; |
| 448 | { |
| 449 | UInt32 fixedHashSize = 0; |
| 450 | if (p->numHashBytes > 2 && p->numHashBytes_Min <= 2) fixedHashSize += kHash2Size; |
| 451 | if (p->numHashBytes > 3 && p->numHashBytes_Min <= 3) fixedHashSize += kHash3Size; |
| 452 | // if (p->numHashBytes > 4) p->fixedHashSize += hs4; // kHash4Size; |
| 453 | hashSizeSum += fixedHashSize; |
| 454 | p->fixedHashSize = fixedHashSize; |
| 455 | } |
| 456 | } |
| 457 | |
| 458 | p->matchMaxLen = matchMaxLen; |
| 459 | |
| 460 | { |
| 461 | size_t newSize; |
| 462 | size_t numSons; |
| 463 | const UInt32 newCyclicBufferSize = historySize + 1; // do not change it |
| 464 | p->historySize = historySize; |
| 465 | p->cyclicBufferSize = newCyclicBufferSize; // it must be = (historySize + 1) |
| 466 | |
| 467 | numSons = newCyclicBufferSize; |
| 468 | if (p->btMode) |
| 469 | numSons <<= 1; |
| 470 | newSize = hashSizeSum + numSons; |
| 471 | |
| 472 | if (numSons < newCyclicBufferSize || newSize < numSons) |
| 473 | return 0; |
| 474 | |
| 475 | // aligned size is not required here, but it can be better for some loops |
| 476 | #define NUM_REFS_ALIGN_MASK 0xF |
| 477 | newSize = (newSize + NUM_REFS_ALIGN_MASK) & ~(size_t)NUM_REFS_ALIGN_MASK; |
| 478 | |
| 479 | // 22.02: we don't reallocate buffer, if old size is enough |
| 480 | if (p->hash && p->numRefs >= newSize) |
| 481 | return 1; |
| 482 | |
| 483 | MatchFinder_FreeThisClassMemory(p, alloc); |
| 484 | p->numRefs = newSize; |
| 485 | p->hash = AllocRefs(newSize, alloc); |
| 486 | |
| 487 | if (p->hash) |
| 488 | { |
| 489 | p->son = p->hash + hashSizeSum; |
| 490 | return 1; |
| 491 | } |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | MatchFinder_Free(p, alloc); |
| 496 | return 0; |
| 497 | } |
| 498 | |
| 499 | |
| 500 | static void MatchFinder_SetLimits(CMatchFinder *p) |
| 501 | { |
| 502 | UInt32 k; |
| 503 | UInt32 n = kMaxValForNormalize - p->pos; |
| 504 | if (n == 0) |
| 505 | n = (UInt32)(Int32)-1; // we allow (pos == 0) at start even with (kMaxValForNormalize == 0) |
| 506 | |
| 507 | k = p->cyclicBufferSize - p->cyclicBufferPos; |
| 508 | if (k < n) |
| 509 | n = k; |
| 510 | |
| 511 | k = GET_AVAIL_BYTES(p); |
| 512 | { |
| 513 | const UInt32 ksa = p->keepSizeAfter; |
| 514 | UInt32 mm = p->matchMaxLen; |
| 515 | if (k > ksa) |
| 516 | k -= ksa; // we must limit exactly to keepSizeAfter for ReadBlock |
| 517 | else if (k >= mm) |
| 518 | { |
| 519 | // the limitation for (p->lenLimit) update |
| 520 | k -= mm; // optimization : to reduce the number of checks |
| 521 | k++; |
| 522 | // k = 1; // non-optimized version : for debug |
| 523 | } |
| 524 | else |
| 525 | { |
| 526 | mm = k; |
| 527 | if (k != 0) |
| 528 | k = 1; |
| 529 | } |
| 530 | p->lenLimit = mm; |
| 531 | } |
| 532 | if (k < n) |
| 533 | n = k; |
| 534 | |
| 535 | p->posLimit = p->pos + n; |
| 536 | } |
| 537 | |
| 538 | |
| 539 | void MatchFinder_Init_LowHash(CMatchFinder *p) |
| 540 | { |
| 541 | size_t i; |
| 542 | CLzRef *items = p->hash; |
| 543 | const size_t numItems = p->fixedHashSize; |
| 544 | for (i = 0; i < numItems; i++) |
| 545 | items[i] = kEmptyHashValue; |
| 546 | } |
| 547 | |
| 548 | |
| 549 | void MatchFinder_Init_HighHash(CMatchFinder *p) |
| 550 | { |
| 551 | size_t i; |
| 552 | CLzRef *items = p->hash + p->fixedHashSize; |
| 553 | const size_t numItems = (size_t)p->hashMask + 1; |
| 554 | for (i = 0; i < numItems; i++) |
| 555 | items[i] = kEmptyHashValue; |
| 556 | } |
| 557 | |
| 558 | |
| 559 | void MatchFinder_Init_4(CMatchFinder *p) |
| 560 | { |
| 561 | if (!p->directInput) |
| 562 | p->buffer = p->bufBase; |
| 563 | { |
| 564 | /* kEmptyHashValue = 0 (Zero) is used in hash tables as NO-VALUE marker. |
| 565 | the code in CMatchFinderMt expects (pos = 1) */ |
| 566 | p->pos = |
| 567 | p->streamPos = |
| 568 | 1; // it's smallest optimal value. do not change it |
| 569 | // 0; // for debug |
| 570 | } |
| 571 | p->result = SZ_OK; |
| 572 | p->streamEndWasReached = 0; |
| 573 | } |
| 574 | |
| 575 | |
| 576 | // (CYC_TO_POS_OFFSET == 0) is expected by some optimized code |
| 577 | #define CYC_TO_POS_OFFSET 0 |
| 578 | // #define CYC_TO_POS_OFFSET 1 // for debug |
| 579 | |
| 580 | void MatchFinder_Init(void *_p) |
| 581 | { |
| 582 | CMatchFinder *p = (CMatchFinder *)_p; |
| 583 | MatchFinder_Init_HighHash(p); |
| 584 | MatchFinder_Init_LowHash(p); |
| 585 | MatchFinder_Init_4(p); |
| 586 | // if (readData) |
| 587 | MatchFinder_ReadBlock(p); |
| 588 | |
| 589 | /* if we init (cyclicBufferPos = pos), then we can use one variable |
| 590 | instead of both (cyclicBufferPos) and (pos) : only before (cyclicBufferPos) wrapping */ |
| 591 | p->cyclicBufferPos = (p->pos - CYC_TO_POS_OFFSET); // init with relation to (pos) |
| 592 | // p->cyclicBufferPos = 0; // smallest value |
| 593 | // p->son[0] = p->son[1] = 0; // unused: we can init skipped record for speculated accesses. |
| 594 | MatchFinder_SetLimits(p); |
| 595 | } |
| 596 | |
| 597 | |
| 598 | |
| 599 | #ifdef MY_CPU_X86_OR_AMD64 |
| 600 | #if defined(__clang__) && (__clang_major__ >= 4) \ |
| 601 | || defined(Z7_GCC_VERSION) && (Z7_GCC_VERSION >= 40701) |
| 602 | // || defined(__INTEL_COMPILER) && (__INTEL_COMPILER >= 1900) |
| 603 | |
| 604 | #define USE_LZFIND_SATUR_SUB_128 |
| 605 | #define USE_LZFIND_SATUR_SUB_256 |
| 606 | #define LZFIND_ATTRIB_SSE41 __attribute__((__target__("sse4.1"))) |
| 607 | #define LZFIND_ATTRIB_AVX2 __attribute__((__target__("avx2"))) |
| 608 | #elif defined(_MSC_VER) |
| 609 | #if (_MSC_VER >= 1600) |
| 610 | #define USE_LZFIND_SATUR_SUB_128 |
| 611 | #endif |
| 612 | #if (_MSC_VER >= 1900) |
| 613 | #define USE_LZFIND_SATUR_SUB_256 |
| 614 | #endif |
| 615 | #endif |
| 616 | |
| 617 | #elif defined(MY_CPU_ARM64) \ |
| 618 | /* || (defined(__ARM_ARCH) && (__ARM_ARCH >= 7)) */ |
| 619 | |
| 620 | #if defined(Z7_CLANG_VERSION) && (Z7_CLANG_VERSION >= 30800) \ |
| 621 | || defined(__GNUC__) && (__GNUC__ >= 6) |
| 622 | #define USE_LZFIND_SATUR_SUB_128 |
| 623 | #ifdef MY_CPU_ARM64 |
| 624 | // #define LZFIND_ATTRIB_SSE41 __attribute__((__target__(""))) |
| 625 | #else |
| 626 | #define LZFIND_ATTRIB_SSE41 __attribute__((__target__("fpu=neon"))) |
| 627 | #endif |
| 628 | |
| 629 | #elif defined(_MSC_VER) |
| 630 | #if (_MSC_VER >= 1910) |
| 631 | #define USE_LZFIND_SATUR_SUB_128 |
| 632 | #endif |
| 633 | #endif |
| 634 | |
| 635 | #if defined(Z7_MSC_VER_ORIGINAL) && defined(MY_CPU_ARM64) |
| 636 | #include <arm64_neon.h> |
| 637 | #else |
| 638 | #include <arm_neon.h> |
| 639 | #endif |
| 640 | |
| 641 | #endif |
| 642 | |
| 643 | |
| 644 | #ifdef USE_LZFIND_SATUR_SUB_128 |
| 645 | |
| 646 | // #define Z7_SHOW_HW_STATUS |
| 647 | |
| 648 | #ifdef Z7_SHOW_HW_STATUS |
| 649 | #include <stdio.h> |
| 650 | #define PRF(x) x |
| 651 | PRF(;) |
| 652 | #else |
| 653 | #define PRF(x) |
| 654 | #endif |
| 655 | |
| 656 | |
| 657 | #ifdef MY_CPU_ARM_OR_ARM64 |
| 658 | |
| 659 | #ifdef MY_CPU_ARM64 |
| 660 | // #define FORCE_LZFIND_SATUR_SUB_128 |
| 661 | #endif |
| 662 | typedef uint32x4_t LzFind_v128; |
| 663 | #define SASUB_128_V(v, s) \ |
| 664 | vsubq_u32(vmaxq_u32(v, s), s) |
| 665 | |
| 666 | #else // MY_CPU_ARM_OR_ARM64 |
| 667 | |
| 668 | #include <smmintrin.h> // sse4.1 |
| 669 | |
| 670 | typedef __m128i LzFind_v128; |
| 671 | // SSE 4.1 |
| 672 | #define SASUB_128_V(v, s) \ |
| 673 | _mm_sub_epi32(_mm_max_epu32(v, s), s) |
| 674 | |
| 675 | #endif // MY_CPU_ARM_OR_ARM64 |
| 676 | |
| 677 | |
| 678 | #define SASUB_128(i) \ |
| 679 | *( LzFind_v128 *)( void *)(items + (i) * 4) = SASUB_128_V( \ |
| 680 | *(const LzFind_v128 *)(const void *)(items + (i) * 4), sub2); |
| 681 | |
| 682 | |
| 683 | Z7_NO_INLINE |
| 684 | static |
| 685 | #ifdef LZFIND_ATTRIB_SSE41 |
| 686 | LZFIND_ATTRIB_SSE41 |
| 687 | #endif |
| 688 | void |
| 689 | Z7_FASTCALL |
| 690 | LzFind_SaturSub_128(UInt32 subValue, CLzRef *items, const CLzRef *lim) |
| 691 | { |
| 692 | const LzFind_v128 sub2 = |
| 693 | #ifdef MY_CPU_ARM_OR_ARM64 |
| 694 | vdupq_n_u32(subValue); |
| 695 | #else |
| 696 | _mm_set_epi32((Int32)subValue, (Int32)subValue, (Int32)subValue, (Int32)subValue); |
| 697 | #endif |
| 698 | Z7_PRAGMA_OPT_DISABLE_LOOP_UNROLL_VECTORIZE |
| 699 | do |
| 700 | { |
| 701 | SASUB_128(0) SASUB_128(1) items += 2 * 4; |
| 702 | SASUB_128(0) SASUB_128(1) items += 2 * 4; |
| 703 | } |
| 704 | while (items != lim); |
| 705 | } |
| 706 | |
| 707 | |
| 708 | |
| 709 | #ifdef USE_LZFIND_SATUR_SUB_256 |
| 710 | |
| 711 | #include <immintrin.h> // avx |
| 712 | /* |
| 713 | clang :immintrin.h uses |
| 714 | #if !(defined(_MSC_VER) || defined(__SCE__)) || __has_feature(modules) || \ |
| 715 | defined(__AVX2__) |
| 716 | #include <avx2intrin.h> |
| 717 | #endif |
| 718 | so we need <avxintrin.h> for clang-cl */ |
| 719 | |
| 720 | #if defined(__clang__) |
| 721 | #include <avxintrin.h> |
| 722 | #include <avx2intrin.h> |
| 723 | #endif |
| 724 | |
| 725 | // AVX2: |
| 726 | #define SASUB_256(i) \ |
| 727 | *( __m256i *)( void *)(items + (i) * 8) = \ |
| 728 | _mm256_sub_epi32(_mm256_max_epu32( \ |
| 729 | *(const __m256i *)(const void *)(items + (i) * 8), sub2), sub2); |
| 730 | |
| 731 | Z7_NO_INLINE |
| 732 | static |
| 733 | #ifdef LZFIND_ATTRIB_AVX2 |
| 734 | LZFIND_ATTRIB_AVX2 |
| 735 | #endif |
| 736 | void |
| 737 | Z7_FASTCALL |
| 738 | LzFind_SaturSub_256(UInt32 subValue, CLzRef *items, const CLzRef *lim) |
| 739 | { |
| 740 | const __m256i sub2 = _mm256_set_epi32( |
| 741 | (Int32)subValue, (Int32)subValue, (Int32)subValue, (Int32)subValue, |
| 742 | (Int32)subValue, (Int32)subValue, (Int32)subValue, (Int32)subValue); |
| 743 | Z7_PRAGMA_OPT_DISABLE_LOOP_UNROLL_VECTORIZE |
| 744 | do |
| 745 | { |
| 746 | SASUB_256(0) SASUB_256(1) items += 2 * 8; |
| 747 | SASUB_256(0) SASUB_256(1) items += 2 * 8; |
| 748 | } |
| 749 | while (items != lim); |
| 750 | } |
| 751 | #endif // USE_LZFIND_SATUR_SUB_256 |
| 752 | |
| 753 | #ifndef FORCE_LZFIND_SATUR_SUB_128 |
| 754 | typedef void (Z7_FASTCALL *LZFIND_SATUR_SUB_CODE_FUNC)( |
| 755 | UInt32 subValue, CLzRef *items, const CLzRef *lim); |
| 756 | static LZFIND_SATUR_SUB_CODE_FUNC g_LzFind_SaturSub; |
| 757 | #endif // FORCE_LZFIND_SATUR_SUB_128 |
| 758 | |
| 759 | #endif // USE_LZFIND_SATUR_SUB_128 |
| 760 | |
| 761 | |
| 762 | // kEmptyHashValue must be zero |
| 763 | // #define SASUB_32(i) { UInt32 v = items[i]; UInt32 m = v - subValue; if (v < subValue) m = kEmptyHashValue; items[i] = m; } |
| 764 | #define SASUB_32(i) { UInt32 v = items[i]; if (v < subValue) v = subValue; items[i] = v - subValue; } |
| 765 | |
| 766 | #ifdef FORCE_LZFIND_SATUR_SUB_128 |
| 767 | |
| 768 | #define DEFAULT_SaturSub LzFind_SaturSub_128 |
| 769 | |
| 770 | #else |
| 771 | |
| 772 | #define DEFAULT_SaturSub LzFind_SaturSub_32 |
| 773 | |
| 774 | Z7_NO_INLINE |
| 775 | static |
| 776 | void |
| 777 | Z7_FASTCALL |
| 778 | LzFind_SaturSub_32(UInt32 subValue, CLzRef *items, const CLzRef *lim) |
| 779 | { |
| 780 | Z7_PRAGMA_OPT_DISABLE_LOOP_UNROLL_VECTORIZE |
| 781 | do |
| 782 | { |
| 783 | SASUB_32(0) SASUB_32(1) items += 2; |
| 784 | SASUB_32(0) SASUB_32(1) items += 2; |
| 785 | SASUB_32(0) SASUB_32(1) items += 2; |
| 786 | SASUB_32(0) SASUB_32(1) items += 2; |
| 787 | } |
| 788 | while (items != lim); |
| 789 | } |
| 790 | |
| 791 | #endif |
| 792 | |
| 793 | |
| 794 | Z7_NO_INLINE |
| 795 | void MatchFinder_Normalize3(UInt32 subValue, CLzRef *items, size_t numItems) |
| 796 | { |
| 797 | #define LZFIND_NORM_ALIGN_BLOCK_SIZE (1 << 7) |
| 798 | Z7_PRAGMA_OPT_DISABLE_LOOP_UNROLL_VECTORIZE |
| 799 | for (; numItems != 0 && ((unsigned)(ptrdiff_t)items & (LZFIND_NORM_ALIGN_BLOCK_SIZE - 1)) != 0; numItems--) |
| 800 | { |
| 801 | SASUB_32(0) |
| 802 | items++; |
| 803 | } |
| 804 | { |
| 805 | const size_t k_Align_Mask = (LZFIND_NORM_ALIGN_BLOCK_SIZE / 4 - 1); |
| 806 | CLzRef *lim = items + (numItems & ~(size_t)k_Align_Mask); |
| 807 | numItems &= k_Align_Mask; |
| 808 | if (items != lim) |
| 809 | { |
| 810 | #if defined(USE_LZFIND_SATUR_SUB_128) && !defined(FORCE_LZFIND_SATUR_SUB_128) |
| 811 | if (g_LzFind_SaturSub) |
| 812 | g_LzFind_SaturSub(subValue, items, lim); |
| 813 | else |
| 814 | #endif |
| 815 | DEFAULT_SaturSub(subValue, items, lim); |
| 816 | } |
| 817 | items = lim; |
| 818 | } |
| 819 | Z7_PRAGMA_OPT_DISABLE_LOOP_UNROLL_VECTORIZE |
| 820 | for (; numItems != 0; numItems--) |
| 821 | { |
| 822 | SASUB_32(0) |
| 823 | items++; |
| 824 | } |
| 825 | } |
| 826 | |
| 827 | |
| 828 | |
| 829 | // call MatchFinder_CheckLimits() only after (p->pos++) update |
| 830 | |
| 831 | Z7_NO_INLINE |
| 832 | static void MatchFinder_CheckLimits(CMatchFinder *p) |
| 833 | { |
| 834 | if (// !p->streamEndWasReached && p->result == SZ_OK && |
| 835 | p->keepSizeAfter == GET_AVAIL_BYTES(p)) |
| 836 | { |
| 837 | // we try to read only in exact state (p->keepSizeAfter == GET_AVAIL_BYTES(p)) |
| 838 | if (MatchFinder_NeedMove(p)) |
| 839 | MatchFinder_MoveBlock(p); |
| 840 | MatchFinder_ReadBlock(p); |
| 841 | } |
| 842 | |
| 843 | if (p->pos == kMaxValForNormalize) |
| 844 | if (GET_AVAIL_BYTES(p) >= p->numHashBytes) // optional optimization for last bytes of data. |
| 845 | /* |
| 846 | if we disable normalization for last bytes of data, and |
| 847 | if (data_size == 4 GiB), we don't call wastfull normalization, |
| 848 | but (pos) will be wrapped over Zero (0) in that case. |
| 849 | And we cannot resume later to normal operation |
| 850 | */ |
| 851 | { |
| 852 | // MatchFinder_Normalize(p); |
| 853 | /* after normalization we need (p->pos >= p->historySize + 1); */ |
| 854 | /* we can reduce subValue to aligned value, if want to keep alignment |
| 855 | of (p->pos) and (p->buffer) for speculated accesses. */ |
| 856 | const UInt32 subValue = (p->pos - p->historySize - 1) /* & ~(UInt32)(kNormalizeAlign - 1) */; |
| 857 | // const UInt32 subValue = (1 << 15); // for debug |
| 858 | // printf("\nMatchFinder_Normalize() subValue == 0x%x\n", subValue); |
| 859 | MatchFinder_REDUCE_OFFSETS(p, subValue) |
| 860 | MatchFinder_Normalize3(subValue, p->hash, (size_t)p->hashMask + 1 + p->fixedHashSize); |
| 861 | { |
| 862 | size_t numSonRefs = p->cyclicBufferSize; |
| 863 | if (p->btMode) |
| 864 | numSonRefs <<= 1; |
| 865 | MatchFinder_Normalize3(subValue, p->son, numSonRefs); |
| 866 | } |
| 867 | } |
| 868 | |
| 869 | if (p->cyclicBufferPos == p->cyclicBufferSize) |
| 870 | p->cyclicBufferPos = 0; |
| 871 | |
| 872 | MatchFinder_SetLimits(p); |
| 873 | } |
| 874 | |
| 875 | |
| 876 | /* |
| 877 | (lenLimit > maxLen) |
| 878 | */ |
| 879 | Z7_FORCE_INLINE |
| 880 | static UInt32 * Hc_GetMatchesSpec(size_t lenLimit, UInt32 curMatch, UInt32 pos, const Byte *cur, CLzRef *son, |
| 881 | size_t _cyclicBufferPos, UInt32 _cyclicBufferSize, UInt32 cutValue, |
| 882 | UInt32 *d, unsigned maxLen) |
| 883 | { |
| 884 | /* |
| 885 | son[_cyclicBufferPos] = curMatch; |
| 886 | for (;;) |
| 887 | { |
| 888 | UInt32 delta = pos - curMatch; |
| 889 | if (cutValue-- == 0 || delta >= _cyclicBufferSize) |
| 890 | return d; |
| 891 | { |
| 892 | const Byte *pb = cur - delta; |
| 893 | curMatch = son[_cyclicBufferPos - delta + ((delta > _cyclicBufferPos) ? _cyclicBufferSize : 0)]; |
| 894 | if (pb[maxLen] == cur[maxLen] && *pb == *cur) |
| 895 | { |
| 896 | UInt32 len = 0; |
| 897 | while (++len != lenLimit) |
| 898 | if (pb[len] != cur[len]) |
| 899 | break; |
| 900 | if (maxLen < len) |
| 901 | { |
| 902 | maxLen = len; |
| 903 | *d++ = len; |
| 904 | *d++ = delta - 1; |
| 905 | if (len == lenLimit) |
| 906 | return d; |
| 907 | } |
| 908 | } |
| 909 | } |
| 910 | } |
| 911 | */ |
| 912 | |
| 913 | const Byte *lim = cur + lenLimit; |
| 914 | son[_cyclicBufferPos] = curMatch; |
| 915 | |
| 916 | do |
| 917 | { |
| 918 | UInt32 delta; |
| 919 | |
| 920 | if (curMatch == 0) |
| 921 | break; |
| 922 | // if (curMatch2 >= curMatch) return NULL; |
| 923 | delta = pos - curMatch; |
| 924 | if (delta >= _cyclicBufferSize) |
| 925 | break; |
| 926 | { |
| 927 | ptrdiff_t diff; |
| 928 | curMatch = son[_cyclicBufferPos - delta + ((delta > _cyclicBufferPos) ? _cyclicBufferSize : 0)]; |
| 929 | diff = (ptrdiff_t)0 - (ptrdiff_t)delta; |
| 930 | if (cur[maxLen] == cur[(ptrdiff_t)maxLen + diff]) |
| 931 | { |
| 932 | const Byte *c = cur; |
| 933 | while (*c == c[diff]) |
| 934 | { |
| 935 | if (++c == lim) |
| 936 | { |
| 937 | d[0] = (UInt32)(lim - cur); |
| 938 | d[1] = delta - 1; |
| 939 | return d + 2; |
| 940 | } |
| 941 | } |
| 942 | { |
| 943 | const unsigned len = (unsigned)(c - cur); |
| 944 | if (maxLen < len) |
| 945 | { |
| 946 | maxLen = len; |
| 947 | d[0] = (UInt32)len; |
| 948 | d[1] = delta - 1; |
| 949 | d += 2; |
| 950 | } |
| 951 | } |
| 952 | } |
| 953 | } |
| 954 | } |
| 955 | while (--cutValue); |
| 956 | |
| 957 | return d; |
| 958 | } |
| 959 | |
| 960 | |
| 961 | Z7_FORCE_INLINE |
| 962 | UInt32 * GetMatchesSpec1(UInt32 lenLimit, UInt32 curMatch, UInt32 pos, const Byte *cur, CLzRef *son, |
| 963 | size_t _cyclicBufferPos, UInt32 _cyclicBufferSize, UInt32 cutValue, |
| 964 | UInt32 *d, UInt32 maxLen) |
| 965 | { |
| 966 | CLzRef *ptr0 = son + ((size_t)_cyclicBufferPos << 1) + 1; |
| 967 | CLzRef *ptr1 = son + ((size_t)_cyclicBufferPos << 1); |
| 968 | unsigned len0 = 0, len1 = 0; |
| 969 | |
| 970 | UInt32 cmCheck; |
| 971 | |
| 972 | // if (curMatch >= pos) { *ptr0 = *ptr1 = kEmptyHashValue; return NULL; } |
| 973 | |
| 974 | cmCheck = (UInt32)(pos - _cyclicBufferSize); |
| 975 | if ((UInt32)pos <= _cyclicBufferSize) |
| 976 | cmCheck = 0; |
| 977 | |
| 978 | if (cmCheck < curMatch) |
| 979 | do |
| 980 | { |
| 981 | const UInt32 delta = pos - curMatch; |
| 982 | { |
| 983 | CLzRef *pair = son + ((size_t)(_cyclicBufferPos - delta + ((delta > _cyclicBufferPos) ? _cyclicBufferSize : 0)) << 1); |
| 984 | const Byte *pb = cur - delta; |
| 985 | unsigned len = (len0 < len1 ? len0 : len1); |
| 986 | const UInt32 pair0 = pair[0]; |
| 987 | if (pb[len] == cur[len]) |
| 988 | { |
| 989 | if (++len != lenLimit && pb[len] == cur[len]) |
| 990 | while (++len != lenLimit) |
| 991 | if (pb[len] != cur[len]) |
| 992 | break; |
| 993 | if (maxLen < len) |
| 994 | { |
| 995 | maxLen = (UInt32)len; |
| 996 | *d++ = (UInt32)len; |
| 997 | *d++ = delta - 1; |
| 998 | if (len == lenLimit) |
| 999 | { |
| 1000 | *ptr1 = pair0; |
| 1001 | *ptr0 = pair[1]; |
| 1002 | return d; |
| 1003 | } |
| 1004 | } |
| 1005 | } |
| 1006 | if (pb[len] < cur[len]) |
| 1007 | { |
| 1008 | *ptr1 = curMatch; |
| 1009 | // const UInt32 curMatch2 = pair[1]; |
| 1010 | // if (curMatch2 >= curMatch) { *ptr0 = *ptr1 = kEmptyHashValue; return NULL; } |
| 1011 | // curMatch = curMatch2; |
| 1012 | curMatch = pair[1]; |
| 1013 | ptr1 = pair + 1; |
| 1014 | len1 = len; |
| 1015 | } |
| 1016 | else |
| 1017 | { |
| 1018 | *ptr0 = curMatch; |
| 1019 | curMatch = pair[0]; |
| 1020 | ptr0 = pair; |
| 1021 | len0 = len; |
| 1022 | } |
| 1023 | } |
| 1024 | } |
| 1025 | while(--cutValue && cmCheck < curMatch); |
| 1026 | |
| 1027 | *ptr0 = *ptr1 = kEmptyHashValue; |
| 1028 | return d; |
| 1029 | } |
| 1030 | |
| 1031 | |
| 1032 | static void SkipMatchesSpec(UInt32 lenLimit, UInt32 curMatch, UInt32 pos, const Byte *cur, CLzRef *son, |
| 1033 | size_t _cyclicBufferPos, UInt32 _cyclicBufferSize, UInt32 cutValue) |
| 1034 | { |
| 1035 | CLzRef *ptr0 = son + ((size_t)_cyclicBufferPos << 1) + 1; |
| 1036 | CLzRef *ptr1 = son + ((size_t)_cyclicBufferPos << 1); |
| 1037 | unsigned len0 = 0, len1 = 0; |
| 1038 | |
| 1039 | UInt32 cmCheck; |
| 1040 | |
| 1041 | cmCheck = (UInt32)(pos - _cyclicBufferSize); |
| 1042 | if ((UInt32)pos <= _cyclicBufferSize) |
| 1043 | cmCheck = 0; |
| 1044 | |
| 1045 | if (// curMatch >= pos || // failure |
| 1046 | cmCheck < curMatch) |
| 1047 | do |
| 1048 | { |
| 1049 | const UInt32 delta = pos - curMatch; |
| 1050 | { |
| 1051 | CLzRef *pair = son + ((size_t)(_cyclicBufferPos - delta + ((delta > _cyclicBufferPos) ? _cyclicBufferSize : 0)) << 1); |
| 1052 | const Byte *pb = cur - delta; |
| 1053 | unsigned len = (len0 < len1 ? len0 : len1); |
| 1054 | if (pb[len] == cur[len]) |
| 1055 | { |
| 1056 | while (++len != lenLimit) |
| 1057 | if (pb[len] != cur[len]) |
| 1058 | break; |
| 1059 | { |
| 1060 | if (len == lenLimit) |
| 1061 | { |
| 1062 | *ptr1 = pair[0]; |
| 1063 | *ptr0 = pair[1]; |
| 1064 | return; |
| 1065 | } |
| 1066 | } |
| 1067 | } |
| 1068 | if (pb[len] < cur[len]) |
| 1069 | { |
| 1070 | *ptr1 = curMatch; |
| 1071 | curMatch = pair[1]; |
| 1072 | ptr1 = pair + 1; |
| 1073 | len1 = len; |
| 1074 | } |
| 1075 | else |
| 1076 | { |
| 1077 | *ptr0 = curMatch; |
| 1078 | curMatch = pair[0]; |
| 1079 | ptr0 = pair; |
| 1080 | len0 = len; |
| 1081 | } |
| 1082 | } |
| 1083 | } |
| 1084 | while(--cutValue && cmCheck < curMatch); |
| 1085 | |
| 1086 | *ptr0 = *ptr1 = kEmptyHashValue; |
| 1087 | return; |
| 1088 | } |
| 1089 | |
| 1090 | |
| 1091 | #define MOVE_POS \ |
| 1092 | p->cyclicBufferPos++; \ |
| 1093 | p->buffer++; \ |
| 1094 | { const UInt32 pos1 = p->pos + 1; \ |
| 1095 | p->pos = pos1; \ |
| 1096 | if (pos1 == p->posLimit) MatchFinder_CheckLimits(p); } |
| 1097 | |
| 1098 | #define MOVE_POS_RET MOVE_POS return distances; |
| 1099 | |
| 1100 | Z7_NO_INLINE |
| 1101 | static void MatchFinder_MovePos(CMatchFinder *p) |
| 1102 | { |
| 1103 | /* we go here at the end of stream data, when (avail < num_hash_bytes) |
| 1104 | We don't update sons[cyclicBufferPos << btMode]. |
| 1105 | So (sons) record will contain junk. And we cannot resume match searching |
| 1106 | to normal operation, even if we will provide more input data in buffer. |
| 1107 | p->sons[p->cyclicBufferPos << p->btMode] = 0; // kEmptyHashValue |
| 1108 | if (p->btMode) |
| 1109 | p->sons[(p->cyclicBufferPos << p->btMode) + 1] = 0; // kEmptyHashValue |
| 1110 | */ |
| 1111 | MOVE_POS |
| 1112 | } |
| 1113 | |
| 1114 | #define GET_MATCHES_HEADER2(minLen, ret_op) \ |
| 1115 | UInt32 hv; const Byte *cur; UInt32 curMatch; \ |
| 1116 | UInt32 lenLimit = p->lenLimit; \ |
| 1117 | if (lenLimit < minLen) { MatchFinder_MovePos(p); ret_op; } \ |
| 1118 | cur = p->buffer; |
| 1119 | |
| 1120 | #define GET_MATCHES_HEADER(minLen) GET_MATCHES_HEADER2(minLen, return distances) |
| 1121 | #define SKIP_HEADER(minLen) \ |
| 1122 | do { GET_MATCHES_HEADER2(minLen, continue) |
| 1123 | |
| 1124 | #define MF_PARAMS(p) lenLimit, curMatch, p->pos, p->buffer, p->son, \ |
| 1125 | p->cyclicBufferPos, p->cyclicBufferSize, p->cutValue |
| 1126 | |
| 1127 | #define SKIP_FOOTER \ |
| 1128 | SkipMatchesSpec(MF_PARAMS(p)); \ |
| 1129 | MOVE_POS \ |
| 1130 | } while (--num); |
| 1131 | |
| 1132 | #define GET_MATCHES_FOOTER_BASE(_maxLen_, func) \ |
| 1133 | distances = func(MF_PARAMS(p), distances, (UInt32)_maxLen_); \ |
| 1134 | MOVE_POS_RET |
| 1135 | |
| 1136 | #define GET_MATCHES_FOOTER_BT(_maxLen_) \ |
| 1137 | GET_MATCHES_FOOTER_BASE(_maxLen_, GetMatchesSpec1) |
| 1138 | |
| 1139 | #define GET_MATCHES_FOOTER_HC(_maxLen_) \ |
| 1140 | GET_MATCHES_FOOTER_BASE(_maxLen_, Hc_GetMatchesSpec) |
| 1141 | |
| 1142 | |
| 1143 | |
| 1144 | #define UPDATE_maxLen { \ |
| 1145 | const ptrdiff_t diff = (ptrdiff_t)0 - (ptrdiff_t)d2; \ |
| 1146 | const Byte *c = cur + maxLen; \ |
| 1147 | const Byte *lim = cur + lenLimit; \ |
| 1148 | for (; c != lim; c++) if (*(c + diff) != *c) break; \ |
| 1149 | maxLen = (unsigned)(c - cur); } |
| 1150 | |
| 1151 | static UInt32* Bt2_MatchFinder_GetMatches(void *_p, UInt32 *distances) |
| 1152 | { |
| 1153 | CMatchFinder *p = (CMatchFinder *)_p; |
| 1154 | GET_MATCHES_HEADER(2) |
| 1155 | HASH2_CALC |
| 1156 | curMatch = p->hash[hv]; |
| 1157 | p->hash[hv] = p->pos; |
| 1158 | GET_MATCHES_FOOTER_BT(1) |
| 1159 | } |
| 1160 | |
| 1161 | UInt32* Bt3Zip_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances) |
| 1162 | { |
| 1163 | GET_MATCHES_HEADER(3) |
| 1164 | HASH_ZIP_CALC |
| 1165 | curMatch = p->hash[hv]; |
| 1166 | p->hash[hv] = p->pos; |
| 1167 | GET_MATCHES_FOOTER_BT(2) |
| 1168 | } |
| 1169 | |
| 1170 | |
| 1171 | #define SET_mmm \ |
| 1172 | mmm = p->cyclicBufferSize; \ |
| 1173 | if (pos < mmm) \ |
| 1174 | mmm = pos; |
| 1175 | |
| 1176 | |
| 1177 | static UInt32* Bt3_MatchFinder_GetMatches(void *_p, UInt32 *distances) |
| 1178 | { |
| 1179 | CMatchFinder *p = (CMatchFinder *)_p; |
| 1180 | UInt32 mmm; |
| 1181 | UInt32 h2, d2, pos; |
| 1182 | unsigned maxLen; |
| 1183 | UInt32 *hash; |
| 1184 | GET_MATCHES_HEADER(3) |
| 1185 | |
| 1186 | HASH3_CALC |
| 1187 | |
| 1188 | hash = p->hash; |
| 1189 | pos = p->pos; |
| 1190 | |
| 1191 | d2 = pos - hash[h2]; |
| 1192 | |
| 1193 | curMatch = (hash + kFix3HashSize)[hv]; |
| 1194 | |
| 1195 | hash[h2] = pos; |
| 1196 | (hash + kFix3HashSize)[hv] = pos; |
| 1197 | |
| 1198 | SET_mmm |
| 1199 | |
| 1200 | maxLen = 2; |
| 1201 | |
| 1202 | if (d2 < mmm && *(cur - d2) == *cur) |
| 1203 | { |
| 1204 | UPDATE_maxLen |
| 1205 | distances[0] = (UInt32)maxLen; |
| 1206 | distances[1] = d2 - 1; |
| 1207 | distances += 2; |
| 1208 | if (maxLen == lenLimit) |
| 1209 | { |
| 1210 | SkipMatchesSpec(MF_PARAMS(p)); |
| 1211 | MOVE_POS_RET |
| 1212 | } |
| 1213 | } |
| 1214 | |
| 1215 | GET_MATCHES_FOOTER_BT(maxLen) |
| 1216 | } |
| 1217 | |
| 1218 | |
| 1219 | static UInt32* Bt4_MatchFinder_GetMatches(void *_p, UInt32 *distances) |
| 1220 | { |
| 1221 | CMatchFinder *p = (CMatchFinder *)_p; |
| 1222 | UInt32 mmm; |
| 1223 | UInt32 h2, h3, d2, d3, pos; |
| 1224 | unsigned maxLen; |
| 1225 | UInt32 *hash; |
| 1226 | GET_MATCHES_HEADER(4) |
| 1227 | |
| 1228 | HASH4_CALC |
| 1229 | |
| 1230 | hash = p->hash; |
| 1231 | pos = p->pos; |
| 1232 | |
| 1233 | d2 = pos - hash [h2]; |
| 1234 | d3 = pos - (hash + kFix3HashSize)[h3]; |
| 1235 | curMatch = (hash + kFix4HashSize)[hv]; |
| 1236 | |
| 1237 | hash [h2] = pos; |
| 1238 | (hash + kFix3HashSize)[h3] = pos; |
| 1239 | (hash + kFix4HashSize)[hv] = pos; |
| 1240 | |
| 1241 | SET_mmm |
| 1242 | |
| 1243 | maxLen = 3; |
| 1244 | |
| 1245 | for (;;) |
| 1246 | { |
| 1247 | if (d2 < mmm && *(cur - d2) == *cur) |
| 1248 | { |
| 1249 | distances[0] = 2; |
| 1250 | distances[1] = d2 - 1; |
| 1251 | distances += 2; |
| 1252 | if (*(cur - d2 + 2) == cur[2]) |
| 1253 | { |
| 1254 | // distances[-2] = 3; |
| 1255 | } |
| 1256 | else if (d3 < mmm && *(cur - d3) == *cur) |
| 1257 | { |
| 1258 | d2 = d3; |
| 1259 | distances[1] = d3 - 1; |
| 1260 | distances += 2; |
| 1261 | } |
| 1262 | else |
| 1263 | break; |
| 1264 | } |
| 1265 | else if (d3 < mmm && *(cur - d3) == *cur) |
| 1266 | { |
| 1267 | d2 = d3; |
| 1268 | distances[1] = d3 - 1; |
| 1269 | distances += 2; |
| 1270 | } |
| 1271 | else |
| 1272 | break; |
| 1273 | |
| 1274 | UPDATE_maxLen |
| 1275 | distances[-2] = (UInt32)maxLen; |
| 1276 | if (maxLen == lenLimit) |
| 1277 | { |
| 1278 | SkipMatchesSpec(MF_PARAMS(p)); |
| 1279 | MOVE_POS_RET |
| 1280 | } |
| 1281 | break; |
| 1282 | } |
| 1283 | |
| 1284 | GET_MATCHES_FOOTER_BT(maxLen) |
| 1285 | } |
| 1286 | |
| 1287 | |
| 1288 | static UInt32* Bt5_MatchFinder_GetMatches(void *_p, UInt32 *distances) |
| 1289 | { |
| 1290 | CMatchFinder *p = (CMatchFinder *)_p; |
| 1291 | UInt32 mmm; |
| 1292 | UInt32 h2, h3, d2, d3, pos; |
| 1293 | unsigned maxLen; |
| 1294 | UInt32 *hash; |
| 1295 | GET_MATCHES_HEADER(5) |
| 1296 | |
| 1297 | HASH5_CALC |
| 1298 | |
| 1299 | hash = p->hash; |
| 1300 | pos = p->pos; |
| 1301 | |
| 1302 | d2 = pos - hash [h2]; |
| 1303 | d3 = pos - (hash + kFix3HashSize)[h3]; |
| 1304 | // d4 = pos - (hash + kFix4HashSize)[h4]; |
| 1305 | |
| 1306 | curMatch = (hash + kFix5HashSize)[hv]; |
| 1307 | |
| 1308 | hash [h2] = pos; |
| 1309 | (hash + kFix3HashSize)[h3] = pos; |
| 1310 | // (hash + kFix4HashSize)[h4] = pos; |
| 1311 | (hash + kFix5HashSize)[hv] = pos; |
| 1312 | |
| 1313 | SET_mmm |
| 1314 | |
| 1315 | maxLen = 4; |
| 1316 | |
| 1317 | for (;;) |
| 1318 | { |
| 1319 | if (d2 < mmm && *(cur - d2) == *cur) |
| 1320 | { |
| 1321 | distances[0] = 2; |
| 1322 | distances[1] = d2 - 1; |
| 1323 | distances += 2; |
| 1324 | if (*(cur - d2 + 2) == cur[2]) |
| 1325 | { |
| 1326 | } |
| 1327 | else if (d3 < mmm && *(cur - d3) == *cur) |
| 1328 | { |
| 1329 | distances[1] = d3 - 1; |
| 1330 | distances += 2; |
| 1331 | d2 = d3; |
| 1332 | } |
| 1333 | else |
| 1334 | break; |
| 1335 | } |
| 1336 | else if (d3 < mmm && *(cur - d3) == *cur) |
| 1337 | { |
| 1338 | distances[1] = d3 - 1; |
| 1339 | distances += 2; |
| 1340 | d2 = d3; |
| 1341 | } |
| 1342 | else |
| 1343 | break; |
| 1344 | |
| 1345 | distances[-2] = 3; |
| 1346 | if (*(cur - d2 + 3) != cur[3]) |
| 1347 | break; |
| 1348 | UPDATE_maxLen |
| 1349 | distances[-2] = (UInt32)maxLen; |
| 1350 | if (maxLen == lenLimit) |
| 1351 | { |
| 1352 | SkipMatchesSpec(MF_PARAMS(p)); |
| 1353 | MOVE_POS_RET |
| 1354 | } |
| 1355 | break; |
| 1356 | } |
| 1357 | |
| 1358 | GET_MATCHES_FOOTER_BT(maxLen) |
| 1359 | } |
| 1360 | |
| 1361 | |
| 1362 | static UInt32* Hc4_MatchFinder_GetMatches(void *_p, UInt32 *distances) |
| 1363 | { |
| 1364 | CMatchFinder *p = (CMatchFinder *)_p; |
| 1365 | UInt32 mmm; |
| 1366 | UInt32 h2, h3, d2, d3, pos; |
| 1367 | unsigned maxLen; |
| 1368 | UInt32 *hash; |
| 1369 | GET_MATCHES_HEADER(4) |
| 1370 | |
| 1371 | HASH4_CALC |
| 1372 | |
| 1373 | hash = p->hash; |
| 1374 | pos = p->pos; |
| 1375 | |
| 1376 | d2 = pos - hash [h2]; |
| 1377 | d3 = pos - (hash + kFix3HashSize)[h3]; |
| 1378 | curMatch = (hash + kFix4HashSize)[hv]; |
| 1379 | |
| 1380 | hash [h2] = pos; |
| 1381 | (hash + kFix3HashSize)[h3] = pos; |
| 1382 | (hash + kFix4HashSize)[hv] = pos; |
| 1383 | |
| 1384 | SET_mmm |
| 1385 | |
| 1386 | maxLen = 3; |
| 1387 | |
| 1388 | for (;;) |
| 1389 | { |
| 1390 | if (d2 < mmm && *(cur - d2) == *cur) |
| 1391 | { |
| 1392 | distances[0] = 2; |
| 1393 | distances[1] = d2 - 1; |
| 1394 | distances += 2; |
| 1395 | if (*(cur - d2 + 2) == cur[2]) |
| 1396 | { |
| 1397 | // distances[-2] = 3; |
| 1398 | } |
| 1399 | else if (d3 < mmm && *(cur - d3) == *cur) |
| 1400 | { |
| 1401 | d2 = d3; |
| 1402 | distances[1] = d3 - 1; |
| 1403 | distances += 2; |
| 1404 | } |
| 1405 | else |
| 1406 | break; |
| 1407 | } |
| 1408 | else if (d3 < mmm && *(cur - d3) == *cur) |
| 1409 | { |
| 1410 | d2 = d3; |
| 1411 | distances[1] = d3 - 1; |
| 1412 | distances += 2; |
| 1413 | } |
| 1414 | else |
| 1415 | break; |
| 1416 | |
| 1417 | UPDATE_maxLen |
| 1418 | distances[-2] = (UInt32)maxLen; |
| 1419 | if (maxLen == lenLimit) |
| 1420 | { |
| 1421 | p->son[p->cyclicBufferPos] = curMatch; |
| 1422 | MOVE_POS_RET |
| 1423 | } |
| 1424 | break; |
| 1425 | } |
| 1426 | |
| 1427 | GET_MATCHES_FOOTER_HC(maxLen) |
| 1428 | } |
| 1429 | |
| 1430 | |
| 1431 | static UInt32 * Hc5_MatchFinder_GetMatches(void *_p, UInt32 *distances) |
| 1432 | { |
| 1433 | CMatchFinder *p = (CMatchFinder *)_p; |
| 1434 | UInt32 mmm; |
| 1435 | UInt32 h2, h3, d2, d3, pos; |
| 1436 | unsigned maxLen; |
| 1437 | UInt32 *hash; |
| 1438 | GET_MATCHES_HEADER(5) |
| 1439 | |
| 1440 | HASH5_CALC |
| 1441 | |
| 1442 | hash = p->hash; |
| 1443 | pos = p->pos; |
| 1444 | |
| 1445 | d2 = pos - hash [h2]; |
| 1446 | d3 = pos - (hash + kFix3HashSize)[h3]; |
| 1447 | // d4 = pos - (hash + kFix4HashSize)[h4]; |
| 1448 | |
| 1449 | curMatch = (hash + kFix5HashSize)[hv]; |
| 1450 | |
| 1451 | hash [h2] = pos; |
| 1452 | (hash + kFix3HashSize)[h3] = pos; |
| 1453 | // (hash + kFix4HashSize)[h4] = pos; |
| 1454 | (hash + kFix5HashSize)[hv] = pos; |
| 1455 | |
| 1456 | SET_mmm |
| 1457 | |
| 1458 | maxLen = 4; |
| 1459 | |
| 1460 | for (;;) |
| 1461 | { |
| 1462 | if (d2 < mmm && *(cur - d2) == *cur) |
| 1463 | { |
| 1464 | distances[0] = 2; |
| 1465 | distances[1] = d2 - 1; |
| 1466 | distances += 2; |
| 1467 | if (*(cur - d2 + 2) == cur[2]) |
| 1468 | { |
| 1469 | } |
| 1470 | else if (d3 < mmm && *(cur - d3) == *cur) |
| 1471 | { |
| 1472 | distances[1] = d3 - 1; |
| 1473 | distances += 2; |
| 1474 | d2 = d3; |
| 1475 | } |
| 1476 | else |
| 1477 | break; |
| 1478 | } |
| 1479 | else if (d3 < mmm && *(cur - d3) == *cur) |
| 1480 | { |
| 1481 | distances[1] = d3 - 1; |
| 1482 | distances += 2; |
| 1483 | d2 = d3; |
| 1484 | } |
| 1485 | else |
| 1486 | break; |
| 1487 | |
| 1488 | distances[-2] = 3; |
| 1489 | if (*(cur - d2 + 3) != cur[3]) |
| 1490 | break; |
| 1491 | UPDATE_maxLen |
| 1492 | distances[-2] = (UInt32)maxLen; |
| 1493 | if (maxLen == lenLimit) |
| 1494 | { |
| 1495 | p->son[p->cyclicBufferPos] = curMatch; |
| 1496 | MOVE_POS_RET |
| 1497 | } |
| 1498 | break; |
| 1499 | } |
| 1500 | |
| 1501 | GET_MATCHES_FOOTER_HC(maxLen) |
| 1502 | } |
| 1503 | |
| 1504 | |
| 1505 | UInt32* Hc3Zip_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances) |
| 1506 | { |
| 1507 | GET_MATCHES_HEADER(3) |
| 1508 | HASH_ZIP_CALC |
| 1509 | curMatch = p->hash[hv]; |
| 1510 | p->hash[hv] = p->pos; |
| 1511 | GET_MATCHES_FOOTER_HC(2) |
| 1512 | } |
| 1513 | |
| 1514 | |
| 1515 | static void Bt2_MatchFinder_Skip(void *_p, UInt32 num) |
| 1516 | { |
| 1517 | CMatchFinder *p = (CMatchFinder *)_p; |
| 1518 | SKIP_HEADER(2) |
| 1519 | { |
| 1520 | HASH2_CALC |
| 1521 | curMatch = p->hash[hv]; |
| 1522 | p->hash[hv] = p->pos; |
| 1523 | } |
| 1524 | SKIP_FOOTER |
| 1525 | } |
| 1526 | |
| 1527 | void Bt3Zip_MatchFinder_Skip(CMatchFinder *p, UInt32 num) |
| 1528 | { |
| 1529 | SKIP_HEADER(3) |
| 1530 | { |
| 1531 | HASH_ZIP_CALC |
| 1532 | curMatch = p->hash[hv]; |
| 1533 | p->hash[hv] = p->pos; |
| 1534 | } |
| 1535 | SKIP_FOOTER |
| 1536 | } |
| 1537 | |
| 1538 | static void Bt3_MatchFinder_Skip(void *_p, UInt32 num) |
| 1539 | { |
| 1540 | CMatchFinder *p = (CMatchFinder *)_p; |
| 1541 | SKIP_HEADER(3) |
| 1542 | { |
| 1543 | UInt32 h2; |
| 1544 | UInt32 *hash; |
| 1545 | HASH3_CALC |
| 1546 | hash = p->hash; |
| 1547 | curMatch = (hash + kFix3HashSize)[hv]; |
| 1548 | hash[h2] = |
| 1549 | (hash + kFix3HashSize)[hv] = p->pos; |
| 1550 | } |
| 1551 | SKIP_FOOTER |
| 1552 | } |
| 1553 | |
| 1554 | static void Bt4_MatchFinder_Skip(void *_p, UInt32 num) |
| 1555 | { |
| 1556 | CMatchFinder *p = (CMatchFinder *)_p; |
| 1557 | SKIP_HEADER(4) |
| 1558 | { |
| 1559 | UInt32 h2, h3; |
| 1560 | UInt32 *hash; |
| 1561 | HASH4_CALC |
| 1562 | hash = p->hash; |
| 1563 | curMatch = (hash + kFix4HashSize)[hv]; |
| 1564 | hash [h2] = |
| 1565 | (hash + kFix3HashSize)[h3] = |
| 1566 | (hash + kFix4HashSize)[hv] = p->pos; |
| 1567 | } |
| 1568 | SKIP_FOOTER |
| 1569 | } |
| 1570 | |
| 1571 | static void Bt5_MatchFinder_Skip(void *_p, UInt32 num) |
| 1572 | { |
| 1573 | CMatchFinder *p = (CMatchFinder *)_p; |
| 1574 | SKIP_HEADER(5) |
| 1575 | { |
| 1576 | UInt32 h2, h3; |
| 1577 | UInt32 *hash; |
| 1578 | HASH5_CALC |
| 1579 | hash = p->hash; |
| 1580 | curMatch = (hash + kFix5HashSize)[hv]; |
| 1581 | hash [h2] = |
| 1582 | (hash + kFix3HashSize)[h3] = |
| 1583 | // (hash + kFix4HashSize)[h4] = |
| 1584 | (hash + kFix5HashSize)[hv] = p->pos; |
| 1585 | } |
| 1586 | SKIP_FOOTER |
| 1587 | } |
| 1588 | |
| 1589 | |
| 1590 | #define HC_SKIP_HEADER(minLen) \ |
| 1591 | do { if (p->lenLimit < minLen) { MatchFinder_MovePos(p); num--; continue; } { \ |
| 1592 | const Byte *cur; \ |
| 1593 | UInt32 *hash; \ |
| 1594 | UInt32 *son; \ |
| 1595 | UInt32 pos = p->pos; \ |
| 1596 | UInt32 num2 = num; \ |
| 1597 | /* (p->pos == p->posLimit) is not allowed here !!! */ \ |
| 1598 | { const UInt32 rem = p->posLimit - pos; if (num2 > rem) num2 = rem; } \ |
| 1599 | num -= num2; \ |
| 1600 | { const UInt32 cycPos = p->cyclicBufferPos; \ |
| 1601 | son = p->son + cycPos; \ |
| 1602 | p->cyclicBufferPos = cycPos + num2; } \ |
| 1603 | cur = p->buffer; \ |
| 1604 | hash = p->hash; \ |
| 1605 | do { \ |
| 1606 | UInt32 curMatch; \ |
| 1607 | UInt32 hv; |
| 1608 | |
| 1609 | |
| 1610 | #define HC_SKIP_FOOTER \ |
| 1611 | cur++; pos++; *son++ = curMatch; \ |
| 1612 | } while (--num2); \ |
| 1613 | p->buffer = cur; \ |
| 1614 | p->pos = pos; \ |
| 1615 | if (pos == p->posLimit) MatchFinder_CheckLimits(p); \ |
| 1616 | }} while(num); \ |
| 1617 | |
| 1618 | |
| 1619 | static void Hc4_MatchFinder_Skip(void *_p, UInt32 num) |
| 1620 | { |
| 1621 | CMatchFinder *p = (CMatchFinder *)_p; |
| 1622 | HC_SKIP_HEADER(4) |
| 1623 | |
| 1624 | UInt32 h2, h3; |
| 1625 | HASH4_CALC |
| 1626 | curMatch = (hash + kFix4HashSize)[hv]; |
| 1627 | hash [h2] = |
| 1628 | (hash + kFix3HashSize)[h3] = |
| 1629 | (hash + kFix4HashSize)[hv] = pos; |
| 1630 | |
| 1631 | HC_SKIP_FOOTER |
| 1632 | } |
| 1633 | |
| 1634 | |
| 1635 | static void Hc5_MatchFinder_Skip(void *_p, UInt32 num) |
| 1636 | { |
| 1637 | CMatchFinder *p = (CMatchFinder *)_p; |
| 1638 | HC_SKIP_HEADER(5) |
| 1639 | |
| 1640 | UInt32 h2, h3; |
| 1641 | HASH5_CALC |
| 1642 | curMatch = (hash + kFix5HashSize)[hv]; |
| 1643 | hash [h2] = |
| 1644 | (hash + kFix3HashSize)[h3] = |
| 1645 | // (hash + kFix4HashSize)[h4] = |
| 1646 | (hash + kFix5HashSize)[hv] = pos; |
| 1647 | |
| 1648 | HC_SKIP_FOOTER |
| 1649 | } |
| 1650 | |
| 1651 | |
| 1652 | void Hc3Zip_MatchFinder_Skip(CMatchFinder *p, UInt32 num) |
| 1653 | { |
| 1654 | HC_SKIP_HEADER(3) |
| 1655 | |
| 1656 | HASH_ZIP_CALC |
| 1657 | curMatch = hash[hv]; |
| 1658 | hash[hv] = pos; |
| 1659 | |
| 1660 | HC_SKIP_FOOTER |
| 1661 | } |
| 1662 | |
| 1663 | |
| 1664 | void MatchFinder_CreateVTable(CMatchFinder *p, IMatchFinder2 *vTable) |
| 1665 | { |
| 1666 | vTable->Init = MatchFinder_Init; |
| 1667 | vTable->GetNumAvailableBytes = MatchFinder_GetNumAvailableBytes; |
| 1668 | vTable->GetPointerToCurrentPos = MatchFinder_GetPointerToCurrentPos; |
| 1669 | if (!p->btMode) |
| 1670 | { |
| 1671 | if (p->numHashBytes <= 4) |
| 1672 | { |
| 1673 | vTable->GetMatches = Hc4_MatchFinder_GetMatches; |
| 1674 | vTable->Skip = Hc4_MatchFinder_Skip; |
| 1675 | } |
| 1676 | else |
| 1677 | { |
| 1678 | vTable->GetMatches = Hc5_MatchFinder_GetMatches; |
| 1679 | vTable->Skip = Hc5_MatchFinder_Skip; |
| 1680 | } |
| 1681 | } |
| 1682 | else if (p->numHashBytes == 2) |
| 1683 | { |
| 1684 | vTable->GetMatches = Bt2_MatchFinder_GetMatches; |
| 1685 | vTable->Skip = Bt2_MatchFinder_Skip; |
| 1686 | } |
| 1687 | else if (p->numHashBytes == 3) |
| 1688 | { |
| 1689 | vTable->GetMatches = Bt3_MatchFinder_GetMatches; |
| 1690 | vTable->Skip = Bt3_MatchFinder_Skip; |
| 1691 | } |
| 1692 | else if (p->numHashBytes == 4) |
| 1693 | { |
| 1694 | vTable->GetMatches = Bt4_MatchFinder_GetMatches; |
| 1695 | vTable->Skip = Bt4_MatchFinder_Skip; |
| 1696 | } |
| 1697 | else |
| 1698 | { |
| 1699 | vTable->GetMatches = Bt5_MatchFinder_GetMatches; |
| 1700 | vTable->Skip = Bt5_MatchFinder_Skip; |
| 1701 | } |
| 1702 | } |
| 1703 | |
| 1704 | |
| 1705 | |
| 1706 | void LzFindPrepare(void) |
| 1707 | { |
| 1708 | #ifndef FORCE_LZFIND_SATUR_SUB_128 |
| 1709 | #ifdef USE_LZFIND_SATUR_SUB_128 |
| 1710 | LZFIND_SATUR_SUB_CODE_FUNC f = NULL; |
| 1711 | #ifdef MY_CPU_ARM_OR_ARM64 |
| 1712 | { |
| 1713 | if (CPU_IsSupported_NEON()) |
| 1714 | { |
| 1715 | // #pragma message ("=== LzFind NEON") |
| 1716 | PRF(printf("\n=== LzFind NEON\n")); |
| 1717 | f = LzFind_SaturSub_128; |
| 1718 | } |
| 1719 | // f = 0; // for debug |
| 1720 | } |
| 1721 | #else // MY_CPU_ARM_OR_ARM64 |
| 1722 | if (CPU_IsSupported_SSE41()) |
| 1723 | { |
| 1724 | // #pragma message ("=== LzFind SSE41") |
| 1725 | PRF(printf("\n=== LzFind SSE41\n")); |
| 1726 | f = LzFind_SaturSub_128; |
| 1727 | |
| 1728 | #ifdef USE_LZFIND_SATUR_SUB_256 |
| 1729 | if (CPU_IsSupported_AVX2()) |
| 1730 | { |
| 1731 | // #pragma message ("=== LzFind AVX2") |
| 1732 | PRF(printf("\n=== LzFind AVX2\n")); |
| 1733 | f = LzFind_SaturSub_256; |
| 1734 | } |
| 1735 | #endif |
| 1736 | } |
| 1737 | #endif // MY_CPU_ARM_OR_ARM64 |
| 1738 | g_LzFind_SaturSub = f; |
| 1739 | #endif // USE_LZFIND_SATUR_SUB_128 |
| 1740 | #endif // FORCE_LZFIND_SATUR_SUB_128 |
| 1741 | } |
| 1742 | |
| 1743 | |
| 1744 | #undef MOVE_POS |
| 1745 | #undef MOVE_POS_RET |
| 1746 | #undef PRF |