Merge pull request #1060 from facebook/compressImpl
merge bmi2 implementation of encodeSequence into zstd_compress.c
This commit is contained in:
Yann Collet
GitHub
commit
e1c52faace
@ -1582,19 +1582,126 @@ size_t ZSTD_buildCTable(void* dst, size_t dstCapacity,
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}
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}
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#define FUNCTION(fn) fn##_default
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#define TARGET
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#include "zstd_compress_impl.h"
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#undef TARGET
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#undef FUNCTION
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FORCE_INLINE_TEMPLATE size_t
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ZSTD_encodeSequences_body(
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void* dst, size_t dstCapacity,
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FSE_CTable const* CTable_MatchLength, BYTE const* mlCodeTable,
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FSE_CTable const* CTable_OffsetBits, BYTE const* ofCodeTable,
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FSE_CTable const* CTable_LitLength, BYTE const* llCodeTable,
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seqDef const* sequences, size_t nbSeq, int longOffsets)
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{
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BIT_CStream_t blockStream;
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FSE_CState_t stateMatchLength;
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FSE_CState_t stateOffsetBits;
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FSE_CState_t stateLitLength;
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CHECK_E(BIT_initCStream(&blockStream, dst, dstCapacity), dstSize_tooSmall); /* not enough space remaining */
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/* first symbols */
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FSE_initCState2(&stateMatchLength, CTable_MatchLength, mlCodeTable[nbSeq-1]);
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FSE_initCState2(&stateOffsetBits, CTable_OffsetBits, ofCodeTable[nbSeq-1]);
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FSE_initCState2(&stateLitLength, CTable_LitLength, llCodeTable[nbSeq-1]);
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BIT_addBits(&blockStream, sequences[nbSeq-1].litLength, LL_bits[llCodeTable[nbSeq-1]]);
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if (MEM_32bits()) BIT_flushBits(&blockStream);
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BIT_addBits(&blockStream, sequences[nbSeq-1].matchLength, ML_bits[mlCodeTable[nbSeq-1]]);
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if (MEM_32bits()) BIT_flushBits(&blockStream);
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if (longOffsets) {
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U32 const ofBits = ofCodeTable[nbSeq-1];
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int const extraBits = ofBits - MIN(ofBits, STREAM_ACCUMULATOR_MIN-1);
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if (extraBits) {
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BIT_addBits(&blockStream, sequences[nbSeq-1].offset, extraBits);
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BIT_flushBits(&blockStream);
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}
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BIT_addBits(&blockStream, sequences[nbSeq-1].offset >> extraBits,
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ofBits - extraBits);
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} else {
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BIT_addBits(&blockStream, sequences[nbSeq-1].offset, ofCodeTable[nbSeq-1]);
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}
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BIT_flushBits(&blockStream);
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{ size_t n;
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for (n=nbSeq-2 ; n<nbSeq ; n--) { /* intentional underflow */
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BYTE const llCode = llCodeTable[n];
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BYTE const ofCode = ofCodeTable[n];
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BYTE const mlCode = mlCodeTable[n];
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U32 const llBits = LL_bits[llCode];
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U32 const ofBits = ofCode;
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U32 const mlBits = ML_bits[mlCode];
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DEBUGLOG(6, "encoding: litlen:%2u - matchlen:%2u - offCode:%7u",
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sequences[n].litLength,
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sequences[n].matchLength + MINMATCH,
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sequences[n].offset);
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/* 32b*/ /* 64b*/
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/* (7)*/ /* (7)*/
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FSE_encodeSymbol(&blockStream, &stateOffsetBits, ofCode); /* 15 */ /* 15 */
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FSE_encodeSymbol(&blockStream, &stateMatchLength, mlCode); /* 24 */ /* 24 */
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if (MEM_32bits()) BIT_flushBits(&blockStream); /* (7)*/
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FSE_encodeSymbol(&blockStream, &stateLitLength, llCode); /* 16 */ /* 33 */
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if (MEM_32bits() || (ofBits+mlBits+llBits >= 64-7-(LLFSELog+MLFSELog+OffFSELog)))
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BIT_flushBits(&blockStream); /* (7)*/
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BIT_addBits(&blockStream, sequences[n].litLength, llBits);
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if (MEM_32bits() && ((llBits+mlBits)>24)) BIT_flushBits(&blockStream);
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BIT_addBits(&blockStream, sequences[n].matchLength, mlBits);
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if (MEM_32bits() || (ofBits+mlBits+llBits > 56)) BIT_flushBits(&blockStream);
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if (longOffsets) {
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int const extraBits = ofBits - MIN(ofBits, STREAM_ACCUMULATOR_MIN-1);
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if (extraBits) {
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BIT_addBits(&blockStream, sequences[n].offset, extraBits);
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BIT_flushBits(&blockStream); /* (7)*/
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}
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BIT_addBits(&blockStream, sequences[n].offset >> extraBits,
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ofBits - extraBits); /* 31 */
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} else {
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BIT_addBits(&blockStream, sequences[n].offset, ofBits); /* 31 */
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}
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BIT_flushBits(&blockStream); /* (7)*/
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} }
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DEBUGLOG(6, "ZSTD_encodeSequences: flushing ML state with %u bits", stateMatchLength.stateLog);
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FSE_flushCState(&blockStream, &stateMatchLength);
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DEBUGLOG(6, "ZSTD_encodeSequences: flushing Off state with %u bits", stateOffsetBits.stateLog);
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FSE_flushCState(&blockStream, &stateOffsetBits);
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DEBUGLOG(6, "ZSTD_encodeSequences: flushing LL state with %u bits", stateLitLength.stateLog);
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FSE_flushCState(&blockStream, &stateLitLength);
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{ size_t const streamSize = BIT_closeCStream(&blockStream);
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if (streamSize==0) return ERROR(dstSize_tooSmall); /* not enough space */
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return streamSize;
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}
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}
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static size_t
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ZSTD_encodeSequences_default(
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void* dst, size_t dstCapacity,
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FSE_CTable const* CTable_MatchLength, BYTE const* mlCodeTable,
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FSE_CTable const* CTable_OffsetBits, BYTE const* ofCodeTable,
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FSE_CTable const* CTable_LitLength, BYTE const* llCodeTable,
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seqDef const* sequences, size_t nbSeq, int longOffsets)
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{
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return ZSTD_encodeSequences_body(dst, dstCapacity,
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CTable_MatchLength, mlCodeTable,
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CTable_OffsetBits, ofCodeTable,
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CTable_LitLength, llCodeTable,
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sequences, nbSeq, longOffsets);
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}
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#if DYNAMIC_BMI2
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#define FUNCTION(fn) fn##_bmi2
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#define TARGET TARGET_ATTRIBUTE("bmi2")
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#include "zstd_compress_impl.h"
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#undef TARGET
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#undef FUNCTION
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static TARGET_ATTRIBUTE("bmi2") size_t
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ZSTD_encodeSequences_bmi2(
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void* dst, size_t dstCapacity,
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FSE_CTable const* CTable_MatchLength, BYTE const* mlCodeTable,
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FSE_CTable const* CTable_OffsetBits, BYTE const* ofCodeTable,
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FSE_CTable const* CTable_LitLength, BYTE const* llCodeTable,
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seqDef const* sequences, size_t nbSeq, int longOffsets)
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{
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return ZSTD_encodeSequences_body(dst, dstCapacity,
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CTable_MatchLength, mlCodeTable,
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CTable_OffsetBits, ofCodeTable,
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CTable_LitLength, llCodeTable,
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sequences, nbSeq, longOffsets);
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}
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#endif
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@ -1,106 +0,0 @@
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/*
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* Copyright (c) 2018-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under both the BSD-style license (found in the
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* LICENSE file in the root directory of this source tree) and the GPLv2 (found
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* in the COPYING file in the root directory of this source tree).
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* You may select, at your option, one of the above-listed licenses.
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*/
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#ifndef FUNCTION
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# error "FUNCTION(name) must be defined"
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#endif
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#ifndef TARGET
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# error "TARGET must be defined"
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#endif
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MEM_STATIC TARGET
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size_t FUNCTION(ZSTD_encodeSequences)(
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void* dst, size_t dstCapacity,
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FSE_CTable const* CTable_MatchLength, BYTE const* mlCodeTable,
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FSE_CTable const* CTable_OffsetBits, BYTE const* ofCodeTable,
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FSE_CTable const* CTable_LitLength, BYTE const* llCodeTable,
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seqDef const* sequences, size_t nbSeq, int longOffsets)
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{
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BIT_CStream_t blockStream;
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FSE_CState_t stateMatchLength;
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FSE_CState_t stateOffsetBits;
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FSE_CState_t stateLitLength;
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CHECK_E(BIT_initCStream(&blockStream, dst, dstCapacity), dstSize_tooSmall); /* not enough space remaining */
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/* first symbols */
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FSE_initCState2(&stateMatchLength, CTable_MatchLength, mlCodeTable[nbSeq-1]);
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FSE_initCState2(&stateOffsetBits, CTable_OffsetBits, ofCodeTable[nbSeq-1]);
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FSE_initCState2(&stateLitLength, CTable_LitLength, llCodeTable[nbSeq-1]);
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BIT_addBits(&blockStream, sequences[nbSeq-1].litLength, LL_bits[llCodeTable[nbSeq-1]]);
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if (MEM_32bits()) BIT_flushBits(&blockStream);
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BIT_addBits(&blockStream, sequences[nbSeq-1].matchLength, ML_bits[mlCodeTable[nbSeq-1]]);
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if (MEM_32bits()) BIT_flushBits(&blockStream);
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if (longOffsets) {
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U32 const ofBits = ofCodeTable[nbSeq-1];
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int const extraBits = ofBits - MIN(ofBits, STREAM_ACCUMULATOR_MIN-1);
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if (extraBits) {
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BIT_addBits(&blockStream, sequences[nbSeq-1].offset, extraBits);
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BIT_flushBits(&blockStream);
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}
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BIT_addBits(&blockStream, sequences[nbSeq-1].offset >> extraBits,
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ofBits - extraBits);
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} else {
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BIT_addBits(&blockStream, sequences[nbSeq-1].offset, ofCodeTable[nbSeq-1]);
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}
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BIT_flushBits(&blockStream);
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{ size_t n;
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for (n=nbSeq-2 ; n<nbSeq ; n--) { /* intentional underflow */
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BYTE const llCode = llCodeTable[n];
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BYTE const ofCode = ofCodeTable[n];
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BYTE const mlCode = mlCodeTable[n];
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U32 const llBits = LL_bits[llCode];
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U32 const ofBits = ofCode;
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U32 const mlBits = ML_bits[mlCode];
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DEBUGLOG(6, "encoding: litlen:%2u - matchlen:%2u - offCode:%7u",
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sequences[n].litLength,
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sequences[n].matchLength + MINMATCH,
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sequences[n].offset);
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/* 32b*/ /* 64b*/
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/* (7)*/ /* (7)*/
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FSE_encodeSymbol(&blockStream, &stateOffsetBits, ofCode); /* 15 */ /* 15 */
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FSE_encodeSymbol(&blockStream, &stateMatchLength, mlCode); /* 24 */ /* 24 */
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if (MEM_32bits()) BIT_flushBits(&blockStream); /* (7)*/
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FSE_encodeSymbol(&blockStream, &stateLitLength, llCode); /* 16 */ /* 33 */
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if (MEM_32bits() || (ofBits+mlBits+llBits >= 64-7-(LLFSELog+MLFSELog+OffFSELog)))
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BIT_flushBits(&blockStream); /* (7)*/
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BIT_addBits(&blockStream, sequences[n].litLength, llBits);
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if (MEM_32bits() && ((llBits+mlBits)>24)) BIT_flushBits(&blockStream);
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BIT_addBits(&blockStream, sequences[n].matchLength, mlBits);
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if (MEM_32bits() || (ofBits+mlBits+llBits > 56)) BIT_flushBits(&blockStream);
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if (longOffsets) {
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int const extraBits = ofBits - MIN(ofBits, STREAM_ACCUMULATOR_MIN-1);
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if (extraBits) {
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BIT_addBits(&blockStream, sequences[n].offset, extraBits);
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BIT_flushBits(&blockStream); /* (7)*/
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}
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BIT_addBits(&blockStream, sequences[n].offset >> extraBits,
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ofBits - extraBits); /* 31 */
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} else {
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BIT_addBits(&blockStream, sequences[n].offset, ofBits); /* 31 */
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}
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BIT_flushBits(&blockStream); /* (7)*/
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} }
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DEBUGLOG(6, "ZSTD_encodeSequences: flushing ML state with %u bits", stateMatchLength.stateLog);
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FSE_flushCState(&blockStream, &stateMatchLength);
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DEBUGLOG(6, "ZSTD_encodeSequences: flushing Off state with %u bits", stateOffsetBits.stateLog);
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FSE_flushCState(&blockStream, &stateOffsetBits);
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DEBUGLOG(6, "ZSTD_encodeSequences: flushing LL state with %u bits", stateLitLength.stateLog);
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FSE_flushCState(&blockStream, &stateLitLength);
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{ size_t const streamSize = BIT_closeCStream(&blockStream);
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if (streamSize==0) return ERROR(dstSize_tooSmall); /* not enough space */
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return streamSize;
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}
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}
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