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Add ability to specify SHA256 implementation for benchmark purposes

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Hennadii Stepanov 2023-05-16 16:29:58 +01:00
parent 8247a8db69
commit 5f72417176
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GPG key ID: 410108112E7EA81F
2 changed files with 42 additions and 17 deletions
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45
src/crypto/sha256.cpp
View file

@ -579,9 +579,15 @@ bool AVXEnabled()
} // namespace
std::string SHA256AutoDetect()
std::string SHA256AutoDetect(sha256_implementation::UseImplementation use_implementation)
{
std::string ret = "standard";
Transform = sha256::Transform;
TransformD64 = sha256::TransformD64;
TransformD64_2way = nullptr;
TransformD64_4way = nullptr;
TransformD64_8way = nullptr;
#if defined(USE_ASM) && defined(HAVE_GETCPUID)
bool have_sse4 = false;
bool have_xsave = false;
@ -592,7 +598,9 @@ std::string SHA256AutoDetect()
uint32_t eax, ebx, ecx, edx;
GetCPUID(1, 0, eax, ebx, ecx, edx);
have_sse4 = (ecx >> 19) & 1;
if (use_implementation & sha256_implementation::USE_SSE4) {
have_sse4 = (ecx >> 19) & 1;
}
have_xsave = (ecx >> 27) & 1;
have_avx = (ecx >> 28) & 1;
if (have_xsave && have_avx) {
@ -600,8 +608,12 @@ std::string SHA256AutoDetect()
}
if (have_sse4) {
GetCPUID(7, 0, eax, ebx, ecx, edx);
have_avx2 = (ebx >> 5) & 1;
have_x86_shani = (ebx >> 29) & 1;
if (use_implementation & sha256_implementation::USE_AVX2) {
have_avx2 = (ebx >> 5) & 1;
}
if (use_implementation & sha256_implementation::USE_SHANI) {
have_x86_shani = (ebx >> 29) & 1;
}
}
#if defined(ENABLE_X86_SHANI) && !defined(BUILD_BITCOIN_INTERNAL)
@ -637,27 +649,28 @@ std::string SHA256AutoDetect()
#if defined(ENABLE_ARM_SHANI) && !defined(BUILD_BITCOIN_INTERNAL)
bool have_arm_shani = false;
if (use_implementation & sha256_implementation::USE_SHANI) {
#if defined(__linux__)
#if defined(__arm__) // 32-bit
if (getauxval(AT_HWCAP2) & HWCAP2_SHA2) {
have_arm_shani = true;
}
if (getauxval(AT_HWCAP2) & HWCAP2_SHA2) {
have_arm_shani = true;
}
#endif
#if defined(__aarch64__) // 64-bit
if (getauxval(AT_HWCAP) & HWCAP_SHA2) {
have_arm_shani = true;
}
if (getauxval(AT_HWCAP) & HWCAP_SHA2) {
have_arm_shani = true;
}
#endif
#endif
#if defined(MAC_OSX)
int val = 0;
size_t len = sizeof(val);
if (sysctlbyname("hw.optional.arm.FEAT_SHA256", &val, &len, nullptr, 0) == 0) {
have_arm_shani = val != 0;
}
int val = 0;
size_t len = sizeof(val);
if (sysctlbyname("hw.optional.arm.FEAT_SHA256", &val, &len, nullptr, 0) == 0) {
have_arm_shani = val != 0;
}
#endif
}
if (have_arm_shani) {
Transform = sha256_arm_shani::Transform;

14
src/crypto/sha256.h
View file

@ -26,10 +26,22 @@ public:
CSHA256& Reset();
};
namespace sha256_implementation {
enum UseImplementation : uint8_t {
STANDARD = 0,
USE_SSE4 = 1 << 0,
USE_AVX2 = 1 << 1,
USE_SHANI = 1 << 2,
USE_SSE4_AND_AVX2 = USE_SSE4 | USE_AVX2,
USE_SSE4_AND_SHANI = USE_SSE4 | USE_SHANI,
USE_ALL = USE_SSE4 | USE_AVX2 | USE_SHANI,
};
}
/** Autodetect the best available SHA256 implementation.
* Returns the name of the implementation.
*/
std::string SHA256AutoDetect();
std::string SHA256AutoDetect(sha256_implementation::UseImplementation use_implementation = sha256_implementation::USE_ALL);
/** Compute multiple double-SHA256's of 64-byte blobs.
* output: pointer to a blocks*32 byte output buffer