diff options
Diffstat (limited to 'sha3.c')
| -rw-r--r-- | sha3.c | 20 |
1 files changed, 14 insertions, 6 deletions
@@ -26,20 +26,28 @@ /** @cond INTERNAL */ // available backends -#define BACKEND_AVX512 8 // AVX-512 backend -#define BACKEND_NEON 4 // A64 Neon backend -#define BACKEND_SCALAR 0 // scalar (default) backend - -// auto-detect backend +#define BACKEND_AUTO 0 // auto-detect (default) +#define BACKEND_SCALAR 1 // scalar backend +#define BACKEND_AVX512 2 // AVX-512 backend +#define BACKEND_NEON 3 // Neon backend + +// if SHA3_BACKEND is defined and set to 0 (the default), then unset it +// and auto-detect the appropriate backend +#if defined(SHA3_BACKEND) && SHA3_BACKEND == BACKEND_AUTO +#undef SHA3_BACKEND +#endif /* defined(SHA3_BACKEND) && SHA3_BACKEND == 0 */ + +// detect backend #ifndef SHA3_BACKEND #if defined(__AVX512F__) #define SHA3_BACKEND BACKEND_AVX512 #elif defined(__ARM_NEON) #define SHA3_BACKEND BACKEND_NEON #else +// no optimized backend detected, fall back to scalar #define SHA3_BACKEND BACKEND_SCALAR #endif -#endif /* SHA3_BACKEND */ +#endif /* !SHA3_BACKEND */ // 64-bit rotate left #define ROL(v, n) (((v) << (n)) | ((v) >> (64-(n)))) |