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Combined hash and fill AES loop (#166)

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Adds more parallelizm into AES loop so modern CPUs can take advantage of it. Also, scratchpad data moves between L1 and L3 caches only one time which saves time and energy per hash.
This commit is contained in:
SChernykh
2019-12-01 16:58:38 +01:00
committed by tevador
parent e3561d661e
commit 219c02e1e5
8 changed files with 140 additions and 3 deletions
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src/randomx.cpp
+17
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@@ -363,4 +363,21 @@ extern "C" {
machine->getFinalResult(output, RANDOMX_HASH_SIZE);
}
void randomx_calculate_hash_first(randomx_vm* machine, uint64_t *tempHash, const void* input, size_t inputSize) {
blake2b(tempHash, sizeof(uint64_t) * 8, input, inputSize, nullptr, 0);
machine->initScratchpad(tempHash);
}
void randomx_calculate_hash_next(randomx_vm* machine, uint64_t *tempHash, const void* nextInput, size_t nextInputSize, void* output) {
machine->resetRoundingMode();
for (uint32_t chain = 0; chain < RANDOMX_PROGRAM_COUNT - 1; ++chain) {
machine->run(tempHash);
blake2b(tempHash, sizeof(uint64_t) * 8, machine->getRegisterFile(), sizeof(randomx::RegisterFile), nullptr, 0);
}
machine->run(tempHash);
// Finish current hash and fill the scratchpad for the next hash at the same time
blake2b(tempHash, sizeof(uint64_t) * 8, nextInput, nextInputSize, nullptr, 0);
machine->hashAndFill(output, RANDOMX_HASH_SIZE, tempHash);
}
}