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bzip2: expose tuning knob for faster/smaller code

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2018-02-07 01:33:25 +01:00
parent 2b7515722b
commit 4cae044b43
5 changed files with 41 additions and 20 deletions
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24
archival/libarchive/bz/compress.c
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@@ -32,6 +32,12 @@ in the file LICENSE.
/* #include "bzlib_private.h" */
#if BZIP2_SPEED >= 5
# define ALWAYS_INLINE_5 ALWAYS_INLINE
#else
# define ALWAYS_INLINE_5 /*nothing*/
#endif
/*---------------------------------------------------*/
/*--- Bit stream I/O ---*/
/*---------------------------------------------------*/
@@ -60,9 +66,7 @@ void bsFinishWrite(EState* s)
/*---------------------------------------------------*/
static
/* Helps only on level 5, on other levels hurts. ? */
#if CONFIG_BZIP2_FAST >= 5
ALWAYS_INLINE
#endif
ALWAYS_INLINE_5
void bsW(EState* s, int32_t n, uint32_t v)
{
while (s->bsLive >= 8) {
@@ -75,9 +79,7 @@ void bsW(EState* s, int32_t n, uint32_t v)
}
/* Same with n == 16: */
static
#if CONFIG_BZIP2_FAST >= 5
ALWAYS_INLINE
#endif
ALWAYS_INLINE_5
void bsW16(EState* s, uint32_t v)
{
while (s->bsLive >= 8) {
@@ -103,9 +105,7 @@ void bsW1_1(EState* s)
s->bsLive += 1;
}
static
#if CONFIG_BZIP2_FAST >= 5
ALWAYS_INLINE
#endif
ALWAYS_INLINE_5
void bsW1_0(EState* s)
{
/* need space for only 1 bit, no need for loop freeing > 8 bits */
@@ -394,7 +394,7 @@ void sendMTFValues(EState* s)
s->rfreq[t][v] = 0;
}
#if CONFIG_BZIP2_FAST >= 5
#if BZIP2_SPEED >= 5
/*
* Set up an auxiliary length table which is used to fast-track
* the common case (nGroups == 6).
@@ -427,7 +427,7 @@ void sendMTFValues(EState* s)
*/
for (t = 0; t < nGroups; t++)
cost[t] = 0;
#if CONFIG_BZIP2_FAST >= 5
#if BZIP2_SPEED >= 5
if (nGroups == 6 && 50 == ge-gs+1) {
/*--- fast track the common case ---*/
register uint32_t cost01, cost23, cost45;
@@ -483,7 +483,7 @@ void sendMTFValues(EState* s)
* Increment the symbol frequencies for the selected table.
*/
/* 1% faster compress. +800 bytes */
#if CONFIG_BZIP2_FAST >= 4
#if BZIP2_SPEED >= 4
if (nGroups == 6 && 50 == ge-gs+1) {
/*--- fast track the common case ---*/
#define BZ_ITUR(nn) s->rfreq[bt][mtfv[gs + (nn)]]++