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Merge pull request #864 from Vsevolod-Livinskij/opt_prefetch

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Optimized prefetch
This commit is contained in:
Dmitry Babokin
2014-10-02 17:16:51 +04:00
parent df38b862c2 eb61d5df72
commit b8a9139f8e
15 changed files with 448 additions and 148 deletions
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20
examples/intrinsics/knc.h
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@@ -2218,6 +2218,26 @@ static FORCEINLINE void __prefetch_read_uniform_nt(const char *p) {
// _mm_prefetch(p, _MM_HINT_NTA); // prefetch into L1$ with non-temporal hint
}
#define PREFETCH_READ_VARYING(CACHE_NUM, HINT) \
static FORCEINLINE void __prefetch_read_varying_##CACHE_NUM##_native(uint8_t *base, uint32_t scale, \
__vec16_i32 offsets, __vec16_i1 mask) { \
_mm512_mask_prefetch_i32gather_ps (offsets, mask, base, scale, HINT); \
offsets = _mm512_permutevar_epi32(_mm512_set_16to16_pi(7,6,5,4,3,2,1,0,15,14,13,12,11,10,9,8), offsets);\
__vec16_i1 copy_mask = _mm512_kmov(mask); \
_mm512_kswapb(mask, copy_mask); \
_mm512_mask_prefetch_i32gather_ps (offsets, mask, base, scale, _MM_HINT_T0); \
} \
static FORCEINLINE void __prefetch_read_varying_##CACHE_NUM(__vec16_i64 addr, __vec16_i1 mask) {} \
PREFETCH_READ_VARYING(1, _MM_HINT_T0)
PREFETCH_READ_VARYING(2, _MM_HINT_T1)
PREFETCH_READ_VARYING(nt, _MM_HINT_T2)
static FORCEINLINE void __prefetch_read_varying_3_native(uint8_t *base, uint32_t scale,
__vec16_i32 offsets, __vec16_i1 mask) {}
static FORCEINLINE void __prefetch_read_varying_3(__vec16_i64 addr, __vec16_i1 mask) {}
///////////////////////////////////////////////////////////////////////////
// atomics
///////////////////////////////////////////////////////////////////////////