improved decompression speed (680)
parent
646693e3be
commit
433a5cce7e
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@ -798,9 +798,9 @@ MEM_STATIC void ZSTD_storeSeq(seqStore_t* seqStorePtr, size_t litLength, const B
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static const BYTE* g_start = NULL;
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const U32 pos = (U32)(literals - g_start);
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if (g_start==NULL) g_start = literals;
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if ((pos > 23945000) && (pos < 23946800))
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printf("Cpos %6u :%4u literals & match %3u bytes at distance %6u \n",
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pos, (U32)litLength, (U32)matchCode+MINMATCH, (U32)offsetCode);
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if ((pos > 15181500) && (pos < 15183150))
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printf("Cpos %6u :%4u literals & match %3u bytes at distance %6u \n",
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pos, (U32)litLength, (U32)matchCode+MINMATCH, (U32)offsetCode);
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#endif
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#if ZSTD_OPT_DEBUG == 3
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if (offsetCode == 0) seqStorePtr->realRepSum++;
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@ -637,9 +637,7 @@ static void ZSTD_decodeSequence(seq_t* seq, seqState_t* seqState, const U32 mls)
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U32 const ofBits = ofCode;
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U32 const totalBits = llBits+mlBits+ofBits;
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size_t const allBits = BIT_readBits(&(seqState->DStream), totalBits);
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if (totalBits > 64 - 7 - (LLFSELog+MLFSELog+OffFSELog)) BIT_reloadDStream(&(seqState->DStream));
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//size_t const allBits = BIT_readBits(&(seqState->DStream), totalBits);
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static const U32 LL_base[MaxLL+1] = {
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
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@ -659,13 +657,15 @@ static void ZSTD_decodeSequence(seq_t* seq, seqState_t* seqState, const U32 mls)
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0xFFFFFF, 0x1FFFFFF, 0x3FFFFFF, /*fake*/ 1, 1, 1, 1, 1 };
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/* sequence */
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seq->litLength = LL_base[llCode] + BIT_getLowerBits(allBits, llBits);
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seq->matchLength = ML_base[mlCode] + mls + BIT_getMiddleBits(allBits, mlBits, llBits);
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{ size_t const offset = ofCode ? OF_base[ofCode] + BIT_getUpperBits(allBits, llBits+mlBits) :
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{ size_t const offset = ofCode ? OF_base[ofCode] + BIT_readBits(&(seqState->DStream), ofBits) :
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llCode ? seq->offset : seqState->prevOffset;
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if (ofCode | !llCode) seqState->prevOffset = seq->offset; /* cmove */
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seq->offset = offset;
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}
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seq->matchLength = ML_base[mlCode] + mls + ((mlCode>31) ? BIT_readBits(&(seqState->DStream), mlBits) : 0);
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seq->litLength = LL_base[llCode] + ((llCode>15) ? BIT_readBits(&(seqState->DStream), llBits) : 0);
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if (totalBits > 64 - 7 - (LLFSELog+MLFSELog+OffFSELog)) BIT_reloadDStream(&(seqState->DStream));
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/* ANS state update */
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FSE_updateState(&(seqState->stateLL), &(seqState->DStream));
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@ -795,7 +795,7 @@ static size_t ZSTD_decompressSequences(
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ZSTD_decodeSequence(&sequence, &seqState, mls);
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#if 0 /* for debug */
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{ U32 pos = (U32)(op-base);
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if ((pos > 23945280) && (pos < 23946797))
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if ((pos > 15181500) && (pos < 15183150))
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printf("Dpos %6u : %3u literals & match %3u bytes at distance %6u \n",
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pos, (U32)sequence.litLength, (U32)sequence.matchLength, (U32)sequence.offset);
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}
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