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final repcodes for ZSTD_btopt

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This commit is contained in:
inikep 2016-03-21 20:14:03 +01:00
parent 378be62a9e
commit f2fa0e1198
2 changed files with 16 additions and 49 deletions
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10
lib/zstd_decompress.c
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@ -683,14 +683,8 @@ static void ZSTD_decodeSequence(seq_t* seq, seqState_t* seqState, const U32 mls)
if (offsetCode==0) offset = 0;
if (offset < ZSTD_REP_NUM) {
if (litLength == 0) {
if (offset <= 1) offset = 1-offset;
offset = seqState->prevOffset[offset];
size_t temp = seqState->prevOffset[1];
seqState->prevOffset[1] = seqState->prevOffset[0];
seqState->prevOffset[0] = temp;
}
else
if (litLength == 0 && offset <= 1) offset = 1-offset;
if (offset != 0) {
size_t temp = seqState->prevOffset[offset];
if (offset != 1) {

55
lib/zstd_opt.h
View File

@ -532,33 +532,11 @@ void ZSTD_compressBlock_opt_generic(ZSTD_CCtx* ctx,
opt[cur].rep[kSlotNew] = opt[cur].off - ZSTD_REP_MOVE;
ZSTD_LOG_ENCODE("%d: COPYREP_OFF cur=%d mlen=%d rep=%d rep[1]=%d\n", (int)(inr-base), cur, mlen, opt[cur].rep[0], opt[cur].rep[1]);
} else {
#if 1
if (opt[cur].litlen == 0) {
opt[cur].rep[0] = opt[cur-mlen].rep[1];
opt[cur].rep[1] = opt[cur-mlen].rep[0];
opt[cur].rep[2] = opt[cur-mlen].rep[2];
opt[cur].rep[3] = opt[cur-mlen].rep[3];
} else {
opt[cur].rep[3] = (opt[cur].off > 2) ? opt[cur-mlen].rep[2] : opt[cur-mlen].rep[3];
opt[cur].rep[2] = (opt[cur].off > 1) ? opt[cur-mlen].rep[1] : opt[cur-mlen].rep[2];
opt[cur].rep[1] = (opt[cur].off > 0) ? opt[cur-mlen].rep[0] : opt[cur-mlen].rep[1];
opt[cur].rep[0] = opt[cur-mlen].rep[opt[cur].off];
}
#else
if (cur!=mlen && opt[cur].litlen == 0) {
opt[cur].rep[3] = (opt[cur].off > 2) ? opt[cur-mlen].rep[2] : opt[cur-mlen].rep[3];
opt[cur].rep[2] = (opt[cur].off > 1) ? opt[cur-mlen].rep[1] : opt[cur-mlen].rep[2];
opt[cur].rep[0] = (opt[cur].off > 0) ? opt[cur-mlen].rep[0] : opt[cur-mlen].rep[1];
opt[cur].rep[1] = opt[cur-mlen].rep[opt[cur].off];
ZSTD_LOG_ENCODE("%d: COPYREP_SWI cur=%d mlen=%d rep=%d rep[1]=%d\n", (int)(inr-base), cur, mlen, opt[cur].rep[0], opt[cur].rep[1]);
} else {
opt[cur].rep[3] = (opt[cur].off > 2) ? opt[cur-mlen].rep[2] : opt[cur-mlen].rep[3];
opt[cur].rep[2] = (opt[cur].off > 1) ? opt[cur-mlen].rep[1] : opt[cur-mlen].rep[2];
opt[cur].rep[1] = (opt[cur].off > 0) ? opt[cur-mlen].rep[0] : opt[cur-mlen].rep[1];
opt[cur].rep[0] = opt[cur-mlen].rep[opt[cur].off];
ZSTD_LOG_ENCODE("%d: COPYREP_NOR cur=%d mlen=%d rep=%d rep[1]=%d\n", (int)(inr-base), cur, mlen, opt[cur].rep[0], opt[cur].rep[1]);
}
#endif
opt[cur].rep[3] = (opt[cur].off > 2) ? opt[cur-mlen].rep[2] : opt[cur-mlen].rep[3];
opt[cur].rep[2] = (opt[cur].off > 1) ? opt[cur-mlen].rep[1] : opt[cur-mlen].rep[2];
opt[cur].rep[1] = (opt[cur].off > 0) ? opt[cur-mlen].rep[0] : opt[cur-mlen].rep[1];
opt[cur].rep[0] = opt[cur-mlen].rep[opt[cur].off];
ZSTD_LOG_ENCODE("%d: COPYREP_NOR cur=%d mlen=%d rep=%d rep[1]=%d\n", (int)(inr-base), cur, mlen, opt[cur].rep[0], opt[cur].rep[1]);
}
ZSTD_LOG_PARSER("%d: CURRENT_NoExt price[%d/%d]=%d off=%d mlen=%d litlen=%d rep=%d rep[1]=%d\n", (int)(inr-base), cur, last_pos, opt[cur].price, opt[cur].off, opt[cur].mlen, opt[cur].litlen, opt[cur].rep[0], opt[cur].rep[1]);
@ -686,22 +664,17 @@ _storeSequence: /* cur, last_pos, best_mlen, best_off have to be set */
if (kSlotNew < 1) rep[1] = rep[0];
rep[kSlotNew] = offset - ZSTD_REP_MOVE;
} else {
if (litLength == 0) {
U32 temp = rep[0];
rep[0] = rep[1];
rep[1] = temp;
if (offset<=1) offset = 1-offset;
} else {
if (offset != 0) {
size_t temp = rep[offset];
if (offset != 1) {
if (offset == 3) rep[3] = rep[2];
rep[2] = rep[1];
}
rep[1] = rep[0];
rep[0] = temp;
if (offset != 0) {
size_t temp = rep[offset];
if (offset != 1) {
if (offset == 3) rep[3] = rep[2];
rep[2] = rep[1];
}
rep[1] = rep[0];
rep[0] = temp;
}
if (litLength == 0 && offset<=1) offset = 1-offset;
}
// ZSTD_LOG_ENCODE("%d/%d: ENCODE2 literals=%d mlen=%d off=%d rep1=%d rep[1]=%d\n", (int)(ip-base), (int)(iend-base), (int)(litLength), (int)mlen, (int)(offset), (int)rep[1], (int)rep_2);