From 1df17c02e537f37745b78f72fd56dda83dae4160 Mon Sep 17 00:00:00 2001 From: "Wladimir J. van der Laan" Date: Tue, 12 Jun 2018 18:52:00 +0200 Subject: [PATCH] Merge #13393: Enable double-SHA256-for-64-byte code on 32-bit x86 57ba401abcfe564a2c4d259e0f758401ed74616d Enable double-SHA256-for-64-byte code on 32-bit x86 (Pieter Wuille) Pull request description: The SSE4 and AVX2 double-SHA256-for-64-byte input code from #13191 compiles fine on 32-bit x86 systems, but the autodetection logic in sha256.cpp doesn't enable it. Fix this. Note that these instruction sets are only available on CPUs that support 64-bit mode as well, so it is only beneficial in the (perhaps unlikely) scenario where a 64-bit CPU is running a 32-bit Bitcoin Core binary. Tree-SHA512: 39d5963c1ba8c33932549d5fe98bd184932689a40aeba95043eca31dd6824f566197c546b60905555eccaf407408a5f0f200247bb0907450d309b0a70b245102 --- src/crypto/sha256.cpp | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/src/crypto/sha256.cpp b/src/crypto/sha256.cpp index 2bf624042..c438de974 100644 --- a/src/crypto/sha256.cpp +++ b/src/crypto/sha256.cpp @@ -530,7 +530,7 @@ bool SelfTest() { } -#if defined(USE_ASM) && (defined(__x86_64__) || defined(__amd64__)) +#if defined(USE_ASM) && (defined(__x86_64__) || defined(__amd64__) || defined(__i386__)) // We can't use cpuid.h's __get_cpuid as it does not support subleafs. void inline cpuid(uint32_t leaf, uint32_t subleaf, uint32_t& a, uint32_t& b, uint32_t& c, uint32_t& d) { @@ -551,13 +551,15 @@ bool AVXEnabled() std::string SHA256AutoDetect() { std::string ret = "standard"; -#if defined(USE_ASM) && (defined(__x86_64__) || defined(__amd64__)) +#if defined(USE_ASM) && (defined(__x86_64__) || defined(__amd64__) || defined(__i386__)) (void)AVXEnabled; // Silence unused warning (in case ENABLE_AVX2 is not defined) uint32_t eax, ebx, ecx, edx; cpuid(1, 0, eax, ebx, ecx, edx); if ((ecx >> 19) & 1) { +#if defined(__x86_64__) || defined(__amd64__) Transform = sha256_sse4::Transform; TransformD64 = TransformD64Wrapper; +#endif #if defined(ENABLE_SSE41) && !defined(BUILD_BITCOIN_INTERNAL) TransformD64_4way = sha256d64_sse41::Transform_4way; ret = "sse4(1way+4way)";