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Second prefetch is useless, because cahce line on modern x86 CPUs is 64 bytes long.

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Dmitry Stogov 2015-03-18 17:11:21 +03:00
parent 5c6db3b0f2
commit d092cb6e8e
1 changed files with 0 additions and 1 deletions
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1
ext/opcache/zend_accelerator_util_funcs.c
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@ -770,7 +770,6 @@ static zend_always_inline void fast_memcpy(void *dest, const void *src, size_t s
do {
_mm_prefetch(dqsrc + 4, _MM_HINT_NTA);
_mm_prefetch(dqsrc + 6, _MM_HINT_NTA);
__m128i xmm0 = _mm_load_si128(dqsrc + 0);
__m128i xmm1 = _mm_load_si128(dqsrc + 1);