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Go Back to Separate Intermediate Functions for Different Dict Modes

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This commit is contained in:
W. Felix Handte
2018-06-13 14:58:36 -04:00
parent f84fc63a43
commit 5d90708a0a
1 changed files with 84 additions and 20 deletions
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lib/compress/zstd_lazy.c
+84 -20
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@@ -291,16 +291,47 @@ static size_t ZSTD_BtFindBestMatch (
static size_t ZSTD_BtFindBestMatch_selectMLS (
ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams,
const BYTE* ip, const BYTE* const iLimit,
size_t* offsetPtr,
const ZSTD_dictMode_e dictMode)
size_t* offsetPtr)
{
switch(cParams->searchLength)
{
default : /* includes case 3 */
case 4 : return ZSTD_BtFindBestMatch(ms, cParams, ip, iLimit, offsetPtr, 4, dictMode);
case 5 : return ZSTD_BtFindBestMatch(ms, cParams, ip, iLimit, offsetPtr, 5, dictMode);
case 4 : return ZSTD_BtFindBestMatch(ms, cParams, ip, iLimit, offsetPtr, 4, ZSTD_noDict);
case 5 : return ZSTD_BtFindBestMatch(ms, cParams, ip, iLimit, offsetPtr, 5, ZSTD_noDict);
case 7 :
case 6 : return ZSTD_BtFindBestMatch(ms, cParams, ip, iLimit, offsetPtr, 6, dictMode);
case 6 : return ZSTD_BtFindBestMatch(ms, cParams, ip, iLimit, offsetPtr, 6, ZSTD_noDict);
}
}
static size_t ZSTD_BtFindBestMatch_dictMatchState_selectMLS (
ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams,
const BYTE* ip, const BYTE* const iLimit,
size_t* offsetPtr)
{
switch(cParams->searchLength)
{
default : /* includes case 3 */
case 4 : return ZSTD_BtFindBestMatch(ms, cParams, ip, iLimit, offsetPtr, 4, ZSTD_dictMatchState);
case 5 : return ZSTD_BtFindBestMatch(ms, cParams, ip, iLimit, offsetPtr, 5, ZSTD_dictMatchState);
case 7 :
case 6 : return ZSTD_BtFindBestMatch(ms, cParams, ip, iLimit, offsetPtr, 6, ZSTD_dictMatchState);
}
}
static size_t ZSTD_BtFindBestMatch_extDict_selectMLS (
ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams,
const BYTE* ip, const BYTE* const iLimit,
size_t* offsetPtr)
{
switch(cParams->searchLength)
{
default : /* includes case 3 */
case 4 : return ZSTD_BtFindBestMatch(ms, cParams, ip, iLimit, offsetPtr, 4, ZSTD_extDict);
case 5 : return ZSTD_BtFindBestMatch(ms, cParams, ip, iLimit, offsetPtr, 5, ZSTD_extDict);
case 7 :
case 6 : return ZSTD_BtFindBestMatch(ms, cParams, ip, iLimit, offsetPtr, 6, ZSTD_extDict);
}
}
@@ -400,15 +431,47 @@ size_t ZSTD_HcFindBestMatch_generic (
FORCE_INLINE_TEMPLATE size_t ZSTD_HcFindBestMatch_selectMLS (
ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams,
const BYTE* ip, const BYTE* const iLimit,
size_t* offsetPtr, const ZSTD_dictMode_e dictMode)
size_t* offsetPtr)
{
switch(cParams->searchLength)
{
default : /* includes case 3 */
case 4 : return ZSTD_HcFindBestMatch_generic(ms, cParams, ip, iLimit, offsetPtr, 4, dictMode);
case 5 : return ZSTD_HcFindBestMatch_generic(ms, cParams, ip, iLimit, offsetPtr, 5, dictMode);
case 4 : return ZSTD_HcFindBestMatch_generic(ms, cParams, ip, iLimit, offsetPtr, 4, ZSTD_noDict);
case 5 : return ZSTD_HcFindBestMatch_generic(ms, cParams, ip, iLimit, offsetPtr, 5, ZSTD_noDict);
case 7 :
case 6 : return ZSTD_HcFindBestMatch_generic(ms, cParams, ip, iLimit, offsetPtr, 6, dictMode);
case 6 : return ZSTD_HcFindBestMatch_generic(ms, cParams, ip, iLimit, offsetPtr, 6, ZSTD_noDict);
}
}
FORCE_INLINE_TEMPLATE size_t ZSTD_HcFindBestMatch_dictMatchState_selectMLS (
ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams,
const BYTE* ip, const BYTE* const iLimit,
size_t* offsetPtr)
{
switch(cParams->searchLength)
{
default : /* includes case 3 */
case 4 : return ZSTD_HcFindBestMatch_generic(ms, cParams, ip, iLimit, offsetPtr, 4, ZSTD_dictMatchState);
case 5 : return ZSTD_HcFindBestMatch_generic(ms, cParams, ip, iLimit, offsetPtr, 5, ZSTD_dictMatchState);
case 7 :
case 6 : return ZSTD_HcFindBestMatch_generic(ms, cParams, ip, iLimit, offsetPtr, 6, ZSTD_dictMatchState);
}
}
FORCE_INLINE_TEMPLATE size_t ZSTD_HcFindBestMatch_extDict_selectMLS (
ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams,
const BYTE* ip, const BYTE* const iLimit,
size_t* offsetPtr)
{
switch(cParams->searchLength)
{
default : /* includes case 3 */
case 4 : return ZSTD_HcFindBestMatch_generic(ms, cParams, ip, iLimit, offsetPtr, 4, ZSTD_extDict);
case 5 : return ZSTD_HcFindBestMatch_generic(ms, cParams, ip, iLimit, offsetPtr, 5, ZSTD_extDict);
case 7 :
case 6 : return ZSTD_HcFindBestMatch_generic(ms, cParams, ip, iLimit, offsetPtr, 6, ZSTD_extDict);
}
}
@@ -434,8 +497,10 @@ size_t ZSTD_compressBlock_lazy_generic(
typedef size_t (*searchMax_f)(
ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams,
const BYTE* ip, const BYTE* iLimit, size_t* offsetPtr, const ZSTD_dictMode_e dictMode);
searchMax_f const searchMax = searchMethod ? ZSTD_BtFindBestMatch_selectMLS : ZSTD_HcFindBestMatch_selectMLS;
const BYTE* ip, const BYTE* iLimit, size_t* offsetPtr);
searchMax_f const searchMax = dictMode == ZSTD_dictMatchState ?
(searchMethod ? ZSTD_BtFindBestMatch_dictMatchState_selectMLS : ZSTD_HcFindBestMatch_dictMatchState_selectMLS) :
(searchMethod ? ZSTD_BtFindBestMatch_selectMLS : ZSTD_HcFindBestMatch_selectMLS);
U32 offset_1 = rep[0], offset_2 = rep[1], savedOffset=0;
(void)dictMode;
@@ -463,7 +528,7 @@ size_t ZSTD_compressBlock_lazy_generic(
/* first search (depth 0) */
{ size_t offsetFound = 99999999;
size_t const ml2 = searchMax(ms, cParams, ip, iend, &offsetFound, dictMode);
size_t const ml2 = searchMax(ms, cParams, ip, iend, &offsetFound);
if (ml2 > matchLength)
matchLength = ml2, start = ip, offset=offsetFound;
}
@@ -485,7 +550,7 @@ size_t ZSTD_compressBlock_lazy_generic(
matchLength = mlRep, offset = 0, start = ip;
}
{ size_t offset2=99999999;
size_t const ml2 = searchMax(ms, cParams, ip, iend, &offset2, dictMode);
size_t const ml2 = searchMax(ms, cParams, ip, iend, &offset2);
int const gain2 = (int)(ml2*4 - ZSTD_highbit32((U32)offset2+1)); /* raw approx */
int const gain1 = (int)(matchLength*4 - ZSTD_highbit32((U32)offset+1) + 4);
if ((ml2 >= 4) && (gain2 > gain1)) {
@@ -504,7 +569,7 @@ size_t ZSTD_compressBlock_lazy_generic(
matchLength = ml2, offset = 0, start = ip;
}
{ size_t offset2=99999999;
size_t const ml2 = searchMax(ms, cParams, ip, iend, &offset2, dictMode);
size_t const ml2 = searchMax(ms, cParams, ip, iend, &offset2);
int const gain2 = (int)(ml2*4 - ZSTD_highbit32((U32)offset2+1)); /* raw approx */
int const gain1 = (int)(matchLength*4 - ZSTD_highbit32((U32)offset+1) + 7);
if ((ml2 >= 4) && (gain2 > gain1)) {
@@ -619,7 +684,6 @@ size_t ZSTD_compressBlock_lazy_extDict_generic(
const void* src, size_t srcSize,
const U32 searchMethod, const U32 depth)
{
const ZSTD_dictMode_e dictMode = ZSTD_extDict;
const BYTE* const istart = (const BYTE*)src;
const BYTE* ip = istart;
const BYTE* anchor = istart;
@@ -635,8 +699,8 @@ size_t ZSTD_compressBlock_lazy_extDict_generic(
typedef size_t (*searchMax_f)(
ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams,
const BYTE* ip, const BYTE* iLimit, size_t* offsetPtr, const ZSTD_dictMode_e dictMode);
searchMax_f searchMax = searchMethod ? ZSTD_BtFindBestMatch_selectMLS : ZSTD_HcFindBestMatch_selectMLS;
const BYTE* ip, const BYTE* iLimit, size_t* offsetPtr);
searchMax_f searchMax = searchMethod ? ZSTD_BtFindBestMatch_extDict_selectMLS : ZSTD_HcFindBestMatch_extDict_selectMLS;
U32 offset_1 = rep[0], offset_2 = rep[1];
@@ -665,7 +729,7 @@ size_t ZSTD_compressBlock_lazy_extDict_generic(
/* first search (depth 0) */
{ size_t offsetFound = 99999999;
size_t const ml2 = searchMax(ms, cParams, ip, iend, &offsetFound, dictMode);
size_t const ml2 = searchMax(ms, cParams, ip, iend, &offsetFound);
if (ml2 > matchLength)
matchLength = ml2, start = ip, offset=offsetFound;
}
@@ -698,7 +762,7 @@ size_t ZSTD_compressBlock_lazy_extDict_generic(
/* search match, depth 1 */
{ size_t offset2=99999999;
size_t const ml2 = searchMax(ms, cParams, ip, iend, &offset2, dictMode);
size_t const ml2 = searchMax(ms, cParams, ip, iend, &offset2);
int const gain2 = (int)(ml2*4 - ZSTD_highbit32((U32)offset2+1)); /* raw approx */
int const gain1 = (int)(matchLength*4 - ZSTD_highbit32((U32)offset+1) + 4);
if ((ml2 >= 4) && (gain2 > gain1)) {
@@ -728,7 +792,7 @@ size_t ZSTD_compressBlock_lazy_extDict_generic(
/* search match, depth 2 */
{ size_t offset2=99999999;
size_t const ml2 = searchMax(ms, cParams, ip, iend, &offset2, dictMode);
size_t const ml2 = searchMax(ms, cParams, ip, iend, &offset2);
int const gain2 = (int)(ml2*4 - ZSTD_highbit32((U32)offset2+1)); /* raw approx */
int const gain1 = (int)(matchLength*4 - ZSTD_highbit32((U32)offset+1) + 7);
if ((ml2 >= 4) && (gain2 > gain1)) {