Commit 30bc41d9 authored by jan.koester's avatar jan.koester
Browse files

musl cpu fix

parent d38c7bec

src/crypto/sha.cpp

+12 −1
Original line number Diff line number Diff line
@@ -125,8 +125,19 @@ static std::vector<uint8_t> sha256_hash_shani(const std::vector<uint8_t>& input) 
}



static bool cpu_has_shani() {

#if defined(__GNUC__) || defined(__clang__)

#if defined(__SHA__)

    // Compiled with -msha, assume CPU supports it

    return true;

#elif defined(__GNUC__) || defined(__clang__)

  #if defined(__linux__) && !defined(__GLIBC__)

    // musl: use cpuid directly

    unsigned int eax, ebx, ecx, edx;

    __asm__ __volatile__("cpuid" : "=a"(eax), "=b"(ebx), "=c"(ecx), "=d"(edx)

                         : "a"(7), "c"(0));

    return (ebx >> 29) & 1; // SHA bit is bit 29 of EBX for CPUID leaf 7

  #else

    return __builtin_cpu_supports("sha");

  #endif

#else

    return false;

#endif