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Merge pull request #705 from dataway/dev

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Rearrange prefetch for slight performance increase in CPU miner
This commit is contained in:
fireice-uk
2018-01-03 07:52:56 +00:00
committed by GitHub
parent e275b4cb98 b38aa07438
commit c88e76d9a9
1 changed files with 6 additions and 7 deletions
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xmrstak/backend/cpu/crypto/cryptonight_aesni.h
+6 -7
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@@ -317,10 +317,9 @@ void cryptonight_hash(const void* input, size_t len, void* output, cryptonight_c
_mm_store_si128((__m128i *)&l0[idx0 & MASK], _mm_xor_si128(bx0, cx));
idx0 = _mm_cvtsi128_si64(cx);
bx0 = cx;
if(PREFETCH)
_mm_prefetch((const char*)&l0[idx0 & MASK], _MM_HINT_T0);
bx0 = cx;
uint64_t hi, lo, cl, ch;
cl = ((uint64_t*)&l0[idx0 & MASK])[0];
@@ -329,15 +328,15 @@ void cryptonight_hash(const void* input, size_t len, void* output, cryptonight_c
lo = _umul128(idx0, cl, &hi);
al0 += hi;
ah0 += lo;
((uint64_t*)&l0[idx0 & MASK])[0] = al0;
al0 ^= cl;
if(PREFETCH)
_mm_prefetch((const char*)&l0[al0 & MASK], _MM_HINT_T0);
ah0 += lo;
((uint64_t*)&l0[idx0 & MASK])[1] = ah0;
ah0 ^= ch;
al0 ^= cl;
idx0 = al0;
if(PREFETCH)
_mm_prefetch((const char*)&l0[idx0 & MASK], _MM_HINT_T0);
idx0 = al0;
}
// Optim - 90% time boundary