facebook
/
zstd
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

restore decompression speed on fizzle

dev
Yann Collet 2016-07-30 15:32:47 +02:00
parent 3b2bd1d11c
commit 66f69e58d2
1 changed files with 4 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
lib/decompress/zstd_decompress.c
View File

@ -583,7 +583,7 @@ typedef struct {
FSE_DState_t stateLL; FSE_DState_t stateLL;
FSE_DState_t stateOffb; FSE_DState_t stateOffb;
FSE_DState_t stateML; FSE_DState_t stateML;
U32 prevOffset[ZSTD_REP_NUM]; size_t prevOffset[ZSTD_REP_NUM];
} seqState_t; } seqState_t;
@ -629,18 +629,17 @@ static seq_t ZSTD_decodeSequence(seqState_t* seqState)
if (ofCode <= 1) { if (ofCode <= 1) {
if ((llCode == 0) & (offset <= 1)) offset = 1-offset; if ((llCode == 0) & (offset <= 1)) offset = 1-offset;
if (offset) { if (offset) {
U32 const temp = seqState->prevOffset[offset]; size_t const temp = seqState->prevOffset[offset];
if (offset != 1) seqState->prevOffset[2] = seqState->prevOffset[1]; if (offset != 1) seqState->prevOffset[2] = seqState->prevOffset[1];
seqState->prevOffset[1] = seqState->prevOffset[0]; seqState->prevOffset[1] = seqState->prevOffset[0];
seqState->prevOffset[0] = temp; seqState->prevOffset[0] = offset = temp;
offset = temp;
} else { } else {
offset = seqState->prevOffset[0]; offset = seqState->prevOffset[0];
} }
} else { } else {
seqState->prevOffset[2] = seqState->prevOffset[1]; seqState->prevOffset[2] = seqState->prevOffset[1];
seqState->prevOffset[1] = seqState->prevOffset[0]; seqState->prevOffset[1] = seqState->prevOffset[0];
seqState->prevOffset[0] = (U32)offset; seqState->prevOffset[0] = offset;
} }
seq.offset = offset; seq.offset = offset;
} }