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decomp: add prefetch for matched seq on aarch64 #3164

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Merged
merged 1 commit into from
Jul 29, 2022
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decomp: add prefetch for matched seq on aarch64 #3164

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5 changes: 5 additions & 0 deletions lib/decompress/zstd_decompress_block.c
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Original file line number Diff line number Diff line change
Expand Up @@ -965,6 +965,11 @@ size_t ZSTD_execSequence(BYTE* op,

assert(op != NULL /* Precondition */);
assert(oend_w < oend /* No underflow */);

#if defined(__aarch64__)
/* prefetch sequence starting from match that will be used for copy later */
PREFETCH_L1(match);
#endif
/* Handle edge cases in a slow path:
* - Read beyond end of literals
* - Match end is within WILDCOPY_OVERLIMIT of oend
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