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Merge pull request #4230 from facebook/variedOutput

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Do not vary row matchfinder selection based on availability of SSE2/Neon
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Victor Zhang 2025-01-06 09:26:57 -08:00 committed by GitHub
commit 59c2e3335f
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1 changed files with 1 additions and 10 deletions
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lib/compress/zstd_compress.c
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@ -237,19 +237,10 @@ static int ZSTD_rowMatchFinderUsed(const ZSTD_strategy strategy, const ZSTD_Para
/* Returns row matchfinder usage given an initial mode and cParams */
static ZSTD_ParamSwitch_e ZSTD_resolveRowMatchFinderMode(ZSTD_ParamSwitch_e mode,
const ZSTD_compressionParameters* const cParams) {
#if defined(ZSTD_ARCH_X86_SSE2) || defined(ZSTD_ARCH_ARM_NEON)
int const kHasSIMD128 = 1;
#else
int const kHasSIMD128 = 0;
#endif
if (mode != ZSTD_ps_auto) return mode; /* if requested enabled, but no SIMD, we still will use row matchfinder */
mode = ZSTD_ps_disable;
if (!ZSTD_rowMatchFinderSupported(cParams->strategy)) return mode;
if (kHasSIMD128) {
if (cParams->windowLog > 14) mode = ZSTD_ps_enable;
} else {
if (cParams->windowLog > 17) mode = ZSTD_ps_enable;
}
if (cParams->windowLog > 14) mode = ZSTD_ps_enable;
return mode;
}