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[zstd] Backport D49756856

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Nick Terrell 2025-03-04 14:55:39 -05:00 committed by Nick Terrell
parent 5e7d721235
commit d5b84f5a27
1 changed files with 1 additions and 1 deletions
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2
lib/decompress/zstd_decompress_block.c
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@ -1726,7 +1726,7 @@ size_t ZSTD_prefetchMatch(size_t prefetchPos, seq_t const sequence,
/* note : this operation can overflow when seq.offset is really too large, which can only happen when input is corrupted.
* No consequence though : memory address is only used for prefetching, not for dereferencing */
const BYTE* const match = (const BYTE*)ZSTD_wrappedPtrSub(ZSTD_wrappedPtrAdd(matchBase, (ptrdiff_t)prefetchPos), (ptrdiff_t)sequence.offset);
PREFETCH_L1(match); PREFETCH_L1(match+CACHELINE_SIZE); /* note : it's safe to invoke PREFETCH() on any memory address, including invalid ones */
PREFETCH_L1(match); PREFETCH_L1(ZSTD_wrappedPtrAdd(match, CACHELINE_SIZE)); /* note : it's safe to invoke PREFETCH() on any memory address, including invalid ones */
}
return prefetchPos + sequence.matchLength;
}