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Optimized cn-heavy

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- Remove unnecessary type conversion when doing `idx0 = d ^ q;`
- Saves 1 CPU cycle in the main loop
- 0.2% speedup on Ryzen 5 5600X, results on other CPUs may vary
This commit is contained in:
SChernykh
2021-03-27 22:21:01 +01:00
parent 955cc366d1
commit bcfd9edaa5
1 changed files with 1 additions and 1 deletions
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2
src/crypto/cn/CryptoNight_x86.h
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@@ -739,7 +739,7 @@ inline void cryptonight_single_hash(const uint8_t *__restrict__ input, size_t si
# ifdef XMRIG_ALGO_CN_HEAVY # ifdef XMRIG_ALGO_CN_HEAVY
if (props.isHeavy()) { if (props.isHeavy()) {
int64_t n = ((int64_t*)&l0[interleaved_index<interleave>(idx0 & MASK)])[0]; int64_t n = ((int64_t*)&l0[interleaved_index<interleave>(idx0 & MASK)])[0];
int32_t d = ((int32_t*)&l0[interleaved_index<interleave>(idx0 & MASK)])[2]; int64_t d = ((int32_t*)&l0[interleaved_index<interleave>(idx0 & MASK)])[2];
int64_t q = n / (d | 0x5); int64_t q = n / (d | 0x5);
((int64_t*)&l0[interleaved_index<interleave>(idx0 & MASK)])[0] = n ^ q; ((int64_t*)&l0[interleaved_index<interleave>(idx0 & MASK)])[0] = n ^ q;