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4-way SSE4.1 implementation for double SHA256 on 64-byte inputs

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This commit is contained in:
Pieter Wuille
2018-05-08 10:27:57 -07:00
parent 1f0e7ca09c
commit 230294bf5f
8 changed files with 385 additions and 7 deletions
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25
src/crypto/sha256.cpp
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@@ -19,6 +19,11 @@ void Transform(uint32_t* s, const unsigned char* chunk, size_t blocks);
#endif
#endif
namespace sha256d64_sse41
{
void Transform_4way(unsigned char* out, const unsigned char* in);
}
// Internal implementation code.
namespace
{
@@ -465,22 +470,28 @@ bool SelfTest(TransformType tr) {
TransformType Transform = sha256::Transform;
TransformD64Type TransformD64 = sha256::TransformD64;
TransformD64Type TransformD64_4way = nullptr;
} // namespace
std::string SHA256AutoDetect()
{
std::string ret = "standard";
#if defined(USE_ASM) && (defined(__x86_64__) || defined(__amd64__))
uint32_t eax, ebx, ecx, edx;
if (__get_cpuid(1, &eax, &ebx, &ecx, &edx) && (ecx >> 19) & 1) {
Transform = sha256_sse4::Transform;
TransformD64 = TransformD64Wrapper<sha256_sse4::Transform>;
assert(SelfTest(Transform));
return "sse4";
#if defined(ENABLE_SSE41) && !defined(BUILD_BITCOIN_INTERNAL)
TransformD64_4way = sha256d64_sse41::Transform_4way;
ret = "sse4(1way+4way)";
#else
ret = "sse4";
#endif
}
#endif
assert(SelfTest(Transform));
return "standard";
return ret;
}
////// SHA-256
@@ -542,6 +553,14 @@ CSHA256& CSHA256::Reset()
void SHA256D64(unsigned char* out, const unsigned char* in, size_t blocks)
{
if (TransformD64_4way) {
while (blocks >= 4) {
TransformD64_4way(out, in);
out += 128;
in += 256;
blocks -= 4;
}
}
while (blocks) {
TransformD64(out, in);
out += 32;