diff --git a/lib/compress/zstd_compress.c b/lib/compress/zstd_compress.c index 444b4027..ac11c3dd 100644 --- a/lib/compress/zstd_compress.c +++ b/lib/compress/zstd_compress.c @@ -1628,7 +1628,6 @@ static size_t ZSTD_resetCCtx_internal(ZSTD_CCtx* zc, ZSTD_ldm_adjustParameters(¶ms.ldmParams, ¶ms.cParams); assert(params.ldmParams.hashLog >= params.ldmParams.bucketSizeLog); assert(params.ldmParams.hashRateLog < 32); - zc->ldmState.hashPower = ZSTD_rollingHash_primePower(params.ldmParams.minMatchLength); } { size_t const windowSize = MAX(1, (size_t)MIN(((U64)1 << params.cParams.windowLog), pledgedSrcSize)); diff --git a/lib/compress/zstd_compress_internal.h b/lib/compress/zstd_compress_internal.h index 8c1e5f9c..6083ed66 100644 --- a/lib/compress/zstd_compress_internal.h +++ b/lib/compress/zstd_compress_internal.h @@ -184,13 +184,22 @@ typedef struct { U32 checksum; } ldmEntry_t; +typedef struct { + BYTE const* split; + U32 hash; + U32 checksum; + ldmEntry_t* bucket; +} ldmMatchCandidate_t; + +#define LDM_BATCH_SIZE 64 + typedef struct { ZSTD_window_t window; /* State for the window round buffer management */ ldmEntry_t* hashTable; U32 loadedDictEnd; BYTE* bucketOffsets; /* Next position in bucket to insert entry */ - U64 hashPower; /* Used to compute the rolling hash. - * Depends on ldmParams.minMatchLength */ + size_t splitIndices[LDM_BATCH_SIZE]; + ldmMatchCandidate_t matchCandidates[LDM_BATCH_SIZE]; } ldmState_t; typedef struct { diff --git a/lib/compress/zstd_ldm.c b/lib/compress/zstd_ldm.c index c38e7753..fb4b8a0f 100644 --- a/lib/compress/zstd_ldm.c +++ b/lib/compress/zstd_ldm.c @@ -11,13 +11,100 @@ #include "zstd_ldm.h" #include "../common/debug.h" +#include "../common/xxhash.h" #include "zstd_fast.h" /* ZSTD_fillHashTable() */ #include "zstd_double_fast.h" /* ZSTD_fillDoubleHashTable() */ +#include "zstd_ldm_geartab.h" #define LDM_BUCKET_SIZE_LOG 3 #define LDM_MIN_MATCH_LENGTH 64 #define LDM_HASH_RLOG 7 +typedef struct { + U64 rolling; + U64 stopMask; +} ldmRollingHashState_t; + +/** ZSTD_ldm_gear_init(): + * + * Initializes the rolling hash state such that it will honor the + * settings in params. */ +static void ZSTD_ldm_gear_init(ldmRollingHashState_t* state, ldmParams_t const* params) +{ + unsigned maxBitsInMask = MIN(params->minMatchLength, 64); + unsigned hashRateLog = params->hashRateLog; + + state->rolling = ~(U32)0; + + /* The choice of the splitting criterion is subject to two conditions: + * 1. it has to trigger on average every 2^(hashRateLog) bytes; + * 2. ideally, it has to depend on a window of minMatchLength bytes. + * + * In the gear hash algorithm, bit n depends on the last n bytes; + * so in order to obtain a good quality splitting criterion it is + * preferable to use bits with high weight. + * + * To match condition 1 we use a mask with hashRateLog bits set + * and, because of the previous remark, we make sure these bits + * have the highest possible weight while still respecting + * condition 2. + */ + if (hashRateLog > 0 && hashRateLog <= maxBitsInMask) { + state->stopMask = (((U64)1 << hashRateLog) - 1) << (maxBitsInMask - hashRateLog); + } else { + /* In this degenerate case we simply honor the hash rate. */ + state->stopMask = ((U64)1 << hashRateLog) - 1; + } +} + +/** ZSTD_ldm_gear_feed(): + * + * Registers in the splits array all the split points found in the first + * size bytes following the data pointer. This function terminates when + * either all the data has been processed or LDM_BATCH_SIZE splits are + * present in the splits array. + * + * Precondition: The splits array must not be full. + * Returns: The number of bytes processed. */ +static size_t ZSTD_ldm_gear_feed(ldmRollingHashState_t* state, + BYTE const* data, size_t size, + size_t* splits, unsigned* numSplits) +{ + size_t n; + U64 hash, mask; + + hash = state->rolling; + mask = state->stopMask; + n = 0; + +#define GEAR_ITER_ONCE() do { \ + hash = (hash << 1) + ZSTD_ldm_gearTab[data[n] & 0xff]; \ + n += 1; \ + if (UNLIKELY((hash & mask) == 0)) { \ + splits[*numSplits] = n; \ + *numSplits += 1; \ + if (*numSplits == LDM_BATCH_SIZE) \ + goto done; \ + } \ + } while (0) + + while (n + 3 < size) { + GEAR_ITER_ONCE(); + GEAR_ITER_ONCE(); + GEAR_ITER_ONCE(); + GEAR_ITER_ONCE(); + } + while (n < size) { + GEAR_ITER_ONCE(); + } + +#undef GEAR_ITER_ONCE + +done: + state->rolling = hash; + return n; +} + void ZSTD_ldm_adjustParameters(ldmParams_t* params, ZSTD_compressionParameters const* cParams) { @@ -53,38 +140,6 @@ size_t ZSTD_ldm_getMaxNbSeq(ldmParams_t params, size_t maxChunkSize) return params.enableLdm ? (maxChunkSize / params.minMatchLength) : 0; } -/** ZSTD_ldm_getSmallHash() : - * numBits should be <= 32 - * If numBits==0, returns 0. - * @return : the most significant numBits of hash. */ -static U32 ZSTD_ldm_getSmallHash(U64 hash, U32 numBits) -{ - assert(numBits <= 32); - return numBits == 0 ? 0 : (U32)(hash >> (64 - numBits)); -} - -/** ZSTD_ldm_getChecksum() : - * numBitsToDiscard should be <= 32 - * @return : the next most significant 32 bits after numBitsToDiscard */ -static U32 ZSTD_ldm_getChecksum(U64 hash, U32 numBitsToDiscard) -{ - assert(numBitsToDiscard <= 32); - return (hash >> (64 - (32 + numBitsToDiscard))) & 0xFFFFFFFF; -} - -/** ZSTD_ldm_getTagMask() : - * Returns the mask against which the rolling hash must be - * checked. */ -static U64 ZSTD_ldm_getTagMask(U32 hbits, U32 hashRateLog) -{ - assert(hashRateLog < 32 && hbits <= 32); - if (32 - hbits < hashRateLog) { - return (((U64)1 << hashRateLog) - 1); - } else { - return (((U64)1 << hashRateLog) - 1) << (32 - hbits - hashRateLog); - } -} - /** ZSTD_ldm_getBucket() : * Returns a pointer to the start of the bucket associated with hash. */ static ldmEntry_t* ZSTD_ldm_getBucket( @@ -107,33 +162,6 @@ static void ZSTD_ldm_insertEntry(ldmState_t* ldmState, } -/** ZSTD_ldm_makeEntryAndInsertByTag() : - * - * Gets the small hash, checksum, and tag from the rollingHash. - * - * If the tag matches (1 << ldmParams.hashRateLog)-1, then - * creates an ldmEntry from the offset, and inserts it into the hash table. - * - * hBits is the length of the small hash, which is the most significant hBits - * of rollingHash. The checksum is the next 32 most significant bits, followed - * by ldmParams.hashRateLog bits that make up the tag. */ -static void ZSTD_ldm_makeEntryAndInsertByTag(ldmState_t* ldmState, - U64 const rollingHash, - U32 const hBits, - U32 const offset, - ldmParams_t const ldmParams) -{ - U64 const tagMask = ZSTD_ldm_getTagMask(hBits, ldmParams.hashRateLog); - if ((rollingHash & tagMask) == tagMask) { - U32 const hash = ZSTD_ldm_getSmallHash(rollingHash, hBits); - U32 const checksum = ZSTD_ldm_getChecksum(rollingHash, hBits); - ldmEntry_t entry; - entry.offset = offset; - entry.checksum = checksum; - ZSTD_ldm_insertEntry(ldmState, hash, entry, ldmParams); - } -} - /** ZSTD_ldm_countBackwardsMatch() : * Returns the number of bytes that match backwards before pIn and pMatch. * @@ -209,43 +237,42 @@ static size_t ZSTD_ldm_fillFastTables(ZSTD_matchState_t* ms, return 0; } -/** ZSTD_ldm_fillLdmHashTable() : - * - * Fills hashTable from (lastHashed + 1) to iend (non-inclusive). - * lastHash is the rolling hash that corresponds to lastHashed. - * - * Returns the rolling hash corresponding to position iend-1. */ -static U64 ZSTD_ldm_fillLdmHashTable(ldmState_t* state, - U64 lastHash, const BYTE* lastHashed, - const BYTE* iend, const BYTE* base, - U32 hBits, ldmParams_t const ldmParams) -{ - U64 rollingHash = lastHash; - const BYTE* cur = lastHashed + 1; - - while (cur < iend) { - rollingHash = ZSTD_rollingHash_rotate(rollingHash, cur[-1], - cur[ldmParams.minMatchLength-1], - state->hashPower); - ZSTD_ldm_makeEntryAndInsertByTag(state, - rollingHash, hBits, - (U32)(cur - base), ldmParams); - ++cur; - } - return rollingHash; -} - void ZSTD_ldm_fillHashTable( - ldmState_t* state, const BYTE* ip, + ldmState_t* ldmState, const BYTE* ip, const BYTE* iend, ldmParams_t const* params) { + U32 const minMatchLength = params->minMatchLength; + U32 const hBits = params->hashLog - params->bucketSizeLog; + BYTE const* const base = ldmState->window.base; + BYTE const* const istart = ip; + ldmRollingHashState_t hashState; + size_t* const splits = ldmState->splitIndices; + unsigned numSplits; + DEBUGLOG(5, "ZSTD_ldm_fillHashTable"); - if ((size_t)(iend - ip) >= params->minMatchLength) { - U64 startingHash = ZSTD_rollingHash_compute(ip, params->minMatchLength); - ZSTD_ldm_fillLdmHashTable( - state, startingHash, ip, iend - params->minMatchLength, state->window.base, - params->hashLog - params->bucketSizeLog, - *params); + + ZSTD_ldm_gear_init(&hashState, params); + while (ip < iend) { + size_t hashed; + unsigned n; + + numSplits = 0; + hashed = ZSTD_ldm_gear_feed(&hashState, ip, iend - ip, splits, &numSplits); + + for (n = 0; n < numSplits; n++) { + if (ip + splits[n] >= istart + minMatchLength) { + BYTE const* const split = ip + splits[n] - minMatchLength; + U64 const xxhash = XXH64(split, minMatchLength, 0); + U32 const hash = (U32)(xxhash & (((U32)1 << hBits) - 1)); + ldmEntry_t entry; + + entry.offset = (U32)(split - base); + entry.checksum = (U32)(xxhash >> 32); + ZSTD_ldm_insertEntry(ldmState, hash, entry, *params); + } + } + + ip += hashed; } } @@ -271,10 +298,8 @@ static size_t ZSTD_ldm_generateSequences_internal( /* LDM parameters */ int const extDict = ZSTD_window_hasExtDict(ldmState->window); U32 const minMatchLength = params->minMatchLength; - U64 const hashPower = ldmState->hashPower; - U32 const hBits = params->hashLog - params->bucketSizeLog; U32 const entsPerBucket = 1U << params->bucketSizeLog; - U64 const tagMask = ZSTD_ldm_getTagMask(hBits, params->hashRateLog); + U32 const hBits = params->hashLog - params->bucketSizeLog; /* Prefix and extDict parameters */ U32 const dictLimit = ldmState->window.dictLimit; U32 const lowestIndex = extDict ? ldmState->window.lowLimit : dictLimit; @@ -286,50 +311,76 @@ static size_t ZSTD_ldm_generateSequences_internal( /* Input bounds */ BYTE const* const istart = (BYTE const*)src; BYTE const* const iend = istart + srcSize; - BYTE const* const ilimit = iend - MAX(minMatchLength, HASH_READ_SIZE); + BYTE const* const ilimit = iend - HASH_READ_SIZE; /* Input positions */ BYTE const* anchor = istart; BYTE const* ip = istart; - /* Rolling hash */ - BYTE const* lastHashed = NULL; - U64 rollingHash = 0; + /* Rolling hash state */ + ldmRollingHashState_t hashState; + /* Arrays for staged-processing */ + size_t* const splits = ldmState->splitIndices; + ldmMatchCandidate_t* const candidates = ldmState->matchCandidates; + unsigned numSplits; - while (ip <= ilimit) { - U32 const currentIndex = (U32)(ip - base); - U32 hash, checksum; - size_t mLength; - size_t forwardMatchLength = 0, backwardMatchLength = 0; - ldmEntry_t const* bestEntry = NULL; - ldmEntry_t newEntry; + if (srcSize < minMatchLength) + return iend - anchor; - if (ip != istart) { - rollingHash = ZSTD_rollingHash_rotate(rollingHash, lastHashed[0], - lastHashed[minMatchLength], - hashPower); - } else { - rollingHash = ZSTD_rollingHash_compute(ip, minMatchLength); + /* Initialize the rolling hash state with the first minMatchLength bytes */ + ZSTD_ldm_gear_init(&hashState, params); + { + size_t n = 0; + + while (n < minMatchLength) { + numSplits = 0; + n += ZSTD_ldm_gear_feed(&hashState, ip + n, minMatchLength - n, + splits, &numSplits); } - lastHashed = ip; + ip += minMatchLength; + } - /* Do not insert and do not look for a match */ - if ((rollingHash & tagMask) != tagMask) { - ip++; - continue; + while (ip < ilimit) { + size_t hashed; + unsigned n; + + numSplits = 0; + hashed = ZSTD_ldm_gear_feed(&hashState, ip, ilimit - ip, + splits, &numSplits); + + for (n = 0; n < numSplits; n++) { + BYTE const* const split = ip + splits[n] - minMatchLength; + U64 const xxhash = XXH64(split, minMatchLength, 0); + U32 const hash = (U32)(xxhash & (((U32)1 << hBits) - 1)); + + candidates[n].split = split; + candidates[n].hash = hash; + candidates[n].checksum = (U32)(xxhash >> 32); + candidates[n].bucket = ZSTD_ldm_getBucket(ldmState, hash, *params); + PREFETCH_L1(candidates[n].bucket); } - hash = ZSTD_ldm_getSmallHash(rollingHash, hBits); - checksum = ZSTD_ldm_getChecksum(rollingHash, hBits); - - newEntry.offset = currentIndex; - newEntry.checksum = checksum; - - /* Get the best entry and compute the match lengths */ - { - ldmEntry_t* const bucket = ZSTD_ldm_getBucket(ldmState, hash, *params); + for (n = 0; n < numSplits; n++) { + size_t forwardMatchLength = 0, backwardMatchLength = 0, + bestMatchLength = 0, mLength; + BYTE const* const split = candidates[n].split; + U32 const checksum = candidates[n].checksum; + U32 const hash = candidates[n].hash; + ldmEntry_t* const bucket = candidates[n].bucket; ldmEntry_t const* cur; - size_t bestMatchLength = 0; + ldmEntry_t const* bestEntry = NULL; + ldmEntry_t newEntry; - for (cur = bucket; cur < bucket + entsPerBucket; ++cur) { + newEntry.offset = (U32)(split - base); + newEntry.checksum = checksum; + + /* If a split point would generate a sequence overlapping with + * the previous one, we merely register it in the hash table and + * move on */ + if (split < anchor) { + ZSTD_ldm_insertEntry(ldmState, hash, newEntry, *params); + continue; + } + + for (cur = bucket; cur < bucket + entsPerBucket; cur++) { size_t curForwardMatchLength, curBackwardMatchLength, curTotalMatchLength; if (cur->checksum != checksum || cur->offset <= lowestIndex) { @@ -343,31 +394,23 @@ static size_t ZSTD_ldm_generateSequences_internal( cur->offset < dictLimit ? dictEnd : iend; BYTE const* const lowMatchPtr = cur->offset < dictLimit ? dictStart : lowPrefixPtr; - - curForwardMatchLength = ZSTD_count_2segments( - ip, pMatch, iend, - matchEnd, lowPrefixPtr); + curForwardMatchLength = + ZSTD_count_2segments(split, pMatch, iend, matchEnd, lowPrefixPtr); if (curForwardMatchLength < minMatchLength) { continue; } - curBackwardMatchLength = - ZSTD_ldm_countBackwardsMatch_2segments(ip, anchor, - pMatch, lowMatchPtr, - dictStart, dictEnd); - curTotalMatchLength = curForwardMatchLength + - curBackwardMatchLength; + curBackwardMatchLength = ZSTD_ldm_countBackwardsMatch_2segments( + split, anchor, pMatch, lowMatchPtr, dictStart, dictEnd); } else { /* !extDict */ BYTE const* const pMatch = base + cur->offset; - curForwardMatchLength = ZSTD_count(ip, pMatch, iend); + curForwardMatchLength = ZSTD_count(split, pMatch, iend); if (curForwardMatchLength < minMatchLength) { continue; } curBackwardMatchLength = - ZSTD_ldm_countBackwardsMatch(ip, anchor, pMatch, - lowPrefixPtr); - curTotalMatchLength = curForwardMatchLength + - curBackwardMatchLength; + ZSTD_ldm_countBackwardsMatch(split, anchor, pMatch, lowPrefixPtr); } + curTotalMatchLength = curForwardMatchLength + curBackwardMatchLength; if (curTotalMatchLength > bestMatchLength) { bestMatchLength = curTotalMatchLength; @@ -376,54 +419,39 @@ static size_t ZSTD_ldm_generateSequences_internal( bestEntry = cur; } } - } - /* No match found -- continue searching */ - if (bestEntry == NULL) { + /* No match found -- insert an entry into the hash table + * and process the next candidate match */ + if (bestEntry == NULL) { + ZSTD_ldm_insertEntry(ldmState, hash, newEntry, *params); + continue; + } + + /* Match found */ + mLength = forwardMatchLength + backwardMatchLength; + { + U32 const offset = (U32)(split - base) - bestEntry->offset; + rawSeq* const seq = rawSeqStore->seq + rawSeqStore->size; + + /* Out of sequence storage */ + if (rawSeqStore->size == rawSeqStore->capacity) + return ERROR(dstSize_tooSmall); + seq->litLength = (U32)(split - backwardMatchLength - anchor); + seq->matchLength = (U32)mLength; + seq->offset = offset; + rawSeqStore->size++; + } + + /* Insert the current entry into the hash table --- it must be + * done after the previous block to avoid clobbering bestEntry */ ZSTD_ldm_insertEntry(ldmState, hash, newEntry, *params); - ip++; - continue; + + anchor = split + forwardMatchLength; } - /* Match found */ - mLength = forwardMatchLength + backwardMatchLength; - ip -= backwardMatchLength; - - { - /* Store the sequence: - * ip = currentIndex - backwardMatchLength - * The match is at (bestEntry->offset - backwardMatchLength) - */ - U32 const matchIndex = bestEntry->offset; - U32 const offset = currentIndex - matchIndex; - rawSeq* const seq = rawSeqStore->seq + rawSeqStore->size; - - /* Out of sequence storage */ - if (rawSeqStore->size == rawSeqStore->capacity) - return ERROR(dstSize_tooSmall); - seq->litLength = (U32)(ip - anchor); - seq->matchLength = (U32)mLength; - seq->offset = offset; - rawSeqStore->size++; - } - - /* Insert the current entry into the hash table --- it must be - * done after the previous block to avoid clobbering bestEntry */ - ZSTD_ldm_insertEntry(ldmState, hash, newEntry, *params); - - assert(ip + backwardMatchLength == lastHashed); - - /* Fill the hash table from lastHashed+1 to ip+mLength*/ - /* Heuristic: don't need to fill the entire table at end of block */ - if (ip + mLength <= ilimit) { - rollingHash = ZSTD_ldm_fillLdmHashTable( - ldmState, rollingHash, lastHashed, - ip + mLength, base, hBits, *params); - lastHashed = ip + mLength - 1; - } - ip += mLength; - anchor = ip; + ip += hashed; } + return iend - anchor; } diff --git a/lib/compress/zstd_ldm_geartab.h b/lib/compress/zstd_ldm_geartab.h new file mode 100644 index 00000000..d24c1f6d --- /dev/null +++ b/lib/compress/zstd_ldm_geartab.h @@ -0,0 +1,103 @@ +/* + * Copyright (c) 2016-2021, Yann Collet, Facebook, Inc. + * All rights reserved. + * + * This source code is licensed under both the BSD-style license (found in the + * LICENSE file in the root directory of this source tree) and the GPLv2 (found + * in the COPYING file in the root directory of this source tree). + * You may select, at your option, one of the above-listed licenses. + */ + +#ifndef ZSTD_LDM_GEARTAB_H +#define ZSTD_LDM_GEARTAB_H + +static U64 ZSTD_ldm_gearTab[256] = { + 0xf5b8f72c5f77775c, 0x84935f266b7ac412, 0xb647ada9ca730ccc, + 0xb065bb4b114fb1de, 0x34584e7e8c3a9fd0, 0x4e97e17c6ae26b05, + 0x3a03d743bc99a604, 0xcecd042422c4044f, 0x76de76c58524259e, + 0x9c8528f65badeaca, 0x86563706e2097529, 0x2902475fa375d889, + 0xafb32a9739a5ebe6, 0xce2714da3883e639, 0x21eaf821722e69e, + 0x37b628620b628, 0x49a8d455d88caf5, 0x8556d711e6958140, + 0x4f7ae74fc605c1f, 0x829f0c3468bd3a20, 0x4ffdc885c625179e, + 0x8473de048a3daf1b, 0x51008822b05646b2, 0x69d75d12b2d1cc5f, + 0x8c9d4a19159154bc, 0xc3cc10f4abbd4003, 0xd06ddc1cecb97391, + 0xbe48e6e7ed80302e, 0x3481db31cee03547, 0xacc3f67cdaa1d210, + 0x65cb771d8c7f96cc, 0x8eb27177055723dd, 0xc789950d44cd94be, + 0x934feadc3700b12b, 0x5e485f11edbdf182, 0x1e2e2a46fd64767a, + 0x2969ca71d82efa7c, 0x9d46e9935ebbba2e, 0xe056b67e05e6822b, + 0x94d73f55739d03a0, 0xcd7010bdb69b5a03, 0x455ef9fcd79b82f4, + 0x869cb54a8749c161, 0x38d1a4fa6185d225, 0xb475166f94bbe9bb, + 0xa4143548720959f1, 0x7aed4780ba6b26ba, 0xd0ce264439e02312, + 0x84366d746078d508, 0xa8ce973c72ed17be, 0x21c323a29a430b01, + 0x9962d617e3af80ee, 0xab0ce91d9c8cf75b, 0x530e8ee6d19a4dbc, + 0x2ef68c0cf53f5d72, 0xc03a681640a85506, 0x496e4e9f9c310967, + 0x78580472b59b14a0, 0x273824c23b388577, 0x66bf923ad45cb553, + 0x47ae1a5a2492ba86, 0x35e304569e229659, 0x4765182a46870b6f, + 0x6cbab625e9099412, 0xddac9a2e598522c1, 0x7172086e666624f2, + 0xdf5003ca503b7837, 0x88c0c1db78563d09, 0x58d51865acfc289d, + 0x177671aec65224f1, 0xfb79d8a241e967d7, 0x2be1e101cad9a49a, + 0x6625682f6e29186b, 0x399553457ac06e50, 0x35dffb4c23abb74, + 0x429db2591f54aade, 0xc52802a8037d1009, 0x6acb27381f0b25f3, + 0xf45e2551ee4f823b, 0x8b0ea2d99580c2f7, 0x3bed519cbcb4e1e1, + 0xff452823dbb010a, 0x9d42ed614f3dd267, 0x5b9313c06257c57b, + 0xa114b8008b5e1442, 0xc1fe311c11c13d4b, 0x66e8763ea34c5568, + 0x8b982af1c262f05d, 0xee8876faaa75fbb7, 0x8a62a4d0d172bb2a, + 0xc13d94a3b7449a97, 0x6dbbba9dc15d037c, 0xc786101f1d92e0f1, + 0xd78681a907a0b79b, 0xf61aaf2962c9abb9, 0x2cfd16fcd3cb7ad9, + 0x868c5b6744624d21, 0x25e650899c74ddd7, 0xba042af4a7c37463, + 0x4eb1a539465a3eca, 0xbe09dbf03b05d5ca, 0x774e5a362b5472ba, + 0x47a1221229d183cd, 0x504b0ca18ef5a2df, 0xdffbdfbde2456eb9, + 0x46cd2b2fbee34634, 0xf2aef8fe819d98c3, 0x357f5276d4599d61, + 0x24a5483879c453e3, 0x88026889192b4b9, 0x28da96671782dbec, + 0x4ef37c40588e9aaa, 0x8837b90651bc9fb3, 0xc164f741d3f0e5d6, + 0xbc135a0a704b70ba, 0x69cd868f7622ada, 0xbc37ba89e0b9c0ab, + 0x47c14a01323552f6, 0x4f00794bacee98bb, 0x7107de7d637a69d5, + 0x88af793bb6f2255e, 0xf3c6466b8799b598, 0xc288c616aa7f3b59, + 0x81ca63cf42fca3fd, 0x88d85ace36a2674b, 0xd056bd3792389e7, + 0xe55c396c4e9dd32d, 0xbefb504571e6c0a6, 0x96ab32115e91e8cc, + 0xbf8acb18de8f38d1, 0x66dae58801672606, 0x833b6017872317fb, + 0xb87c16f2d1c92864, 0xdb766a74e58b669c, 0x89659f85c61417be, + 0xc8daad856011ea0c, 0x76a4b565b6fe7eae, 0xa469d085f6237312, + 0xaaf0365683a3e96c, 0x4dbb746f8424f7b8, 0x638755af4e4acc1, + 0x3d7807f5bde64486, 0x17be6d8f5bbb7639, 0x903f0cd44dc35dc, + 0x67b672eafdf1196c, 0xa676ff93ed4c82f1, 0x521d1004c5053d9d, + 0x37ba9ad09ccc9202, 0x84e54d297aacfb51, 0xa0b4b776a143445, + 0x820d471e20b348e, 0x1874383cb83d46dc, 0x97edeec7a1efe11c, + 0xb330e50b1bdc42aa, 0x1dd91955ce70e032, 0xa514cdb88f2939d5, + 0x2791233fd90db9d3, 0x7b670a4cc50f7a9b, 0x77c07d2a05c6dfa5, + 0xe3778b6646d0a6fa, 0xb39c8eda47b56749, 0x933ed448addbef28, + 0xaf846af6ab7d0bf4, 0xe5af208eb666e49, 0x5e6622f73534cd6a, + 0x297daeca42ef5b6e, 0x862daef3d35539a6, 0xe68722498f8e1ea9, + 0x981c53093dc0d572, 0xfa09b0bfbf86fbf5, 0x30b1e96166219f15, + 0x70e7d466bdc4fb83, 0x5a66736e35f2a8e9, 0xcddb59d2b7c1baef, + 0xd6c7d247d26d8996, 0xea4e39eac8de1ba3, 0x539c8bb19fa3aff2, + 0x9f90e4c5fd508d8, 0xa34e5956fbaf3385, 0x2e2f8e151d3ef375, + 0x173691e9b83faec1, 0xb85a8d56bf016379, 0x8382381267408ae3, + 0xb90f901bbdc0096d, 0x7c6ad32933bcec65, 0x76bb5e2f2c8ad595, + 0x390f851a6cf46d28, 0xc3e6064da1c2da72, 0xc52a0c101cfa5389, + 0xd78eaf84a3fbc530, 0x3781b9e2288b997e, 0x73c2f6dea83d05c4, + 0x4228e364c5b5ed7, 0x9d7a3edf0da43911, 0x8edcfeda24686756, + 0x5e7667a7b7a9b3a1, 0x4c4f389fa143791d, 0xb08bc1023da7cddc, + 0x7ab4be3ae529b1cc, 0x754e6132dbe74ff9, 0x71635442a839df45, + 0x2f6fb1643fbe52de, 0x961e0a42cf7a8177, 0xf3b45d83d89ef2ea, + 0xee3de4cf4a6e3e9b, 0xcd6848542c3295e7, 0xe4cee1664c78662f, + 0x9947548b474c68c4, 0x25d73777a5ed8b0b, 0xc915b1d636b7fc, + 0x21c2ba75d9b0d2da, 0x5f6b5dcf608a64a1, 0xdcf333255ff9570c, + 0x633b922418ced4ee, 0xc136dde0b004b34a, 0x58cc83b05d4b2f5a, + 0x5eb424dda28e42d2, 0x62df47369739cd98, 0xb4e0b42485e4ce17, + 0x16e1f0c1f9a8d1e7, 0x8ec3916707560ebf, 0x62ba6e2df2cc9db3, + 0xcbf9f4ff77d83a16, 0x78d9d7d07d2bbcc4, 0xef554ce1e02c41f4, + 0x8d7581127eccf94d, 0xa9b53336cb3c8a05, 0x38c42c0bf45c4f91, + 0x640893cdf4488863, 0x80ec34bc575ea568, 0x39f324f5b48eaa40, + 0xe9d9ed1f8eff527f, 0x9224fc058cc5a214, 0xbaba00b04cfe7741, + 0x309a9f120fcf52af, 0xa558f3ec65626212, 0x424bec8b7adabe2f, + 0x41622513a6aea433, 0xb88da2d5324ca798, 0xd287733b245528a4, + 0x9a44697e6d68aec3, 0x7b1093be2f49bb28, 0x50bbec632e3d8aad, + 0x6cd90723e1ea8283, 0x897b9e7431b02bf3, 0x219efdcb338a7047, + 0x3b0311f0a27c0656, 0xdb17bf91c0db96e7, 0x8cd4fd6b4e85a5b2, + 0xfab071054ba6409d, 0x40d6fe831fa9dfd9, 0xaf358debad7d791e, + 0xeb8d0e25a65e3e58, 0xbbcbd3df14e08580, 0xcf751f27ecdab2b, + 0x2b4da14f2613d8f4 +}; + +#endif /* ZSTD_LDM_GEARTAB_H */ diff --git a/lib/compress/zstdmt_compress.c b/lib/compress/zstdmt_compress.c index 8a0f40ef..e28e8bb3 100644 --- a/lib/compress/zstdmt_compress.c +++ b/lib/compress/zstdmt_compress.c @@ -472,8 +472,6 @@ ZSTDMT_serialState_reset(serialState_t* serialState, ZSTD_ldm_adjustParameters(¶ms.ldmParams, ¶ms.cParams); assert(params.ldmParams.hashLog >= params.ldmParams.bucketSizeLog); assert(params.ldmParams.hashRateLog < 32); - serialState->ldmState.hashPower = - ZSTD_rollingHash_primePower(params.ldmParams.minMatchLength); } else { ZSTD_memset(¶ms.ldmParams, 0, sizeof(params.ldmParams)); }