diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/crypto/curve25519-hacl64.h | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/src/crypto/curve25519-hacl64.h b/src/crypto/curve25519-hacl64.h index 5631cde..d2637ac 100644 --- a/src/crypto/curve25519-hacl64.h +++ b/src/crypto/curve25519-hacl64.h @@ -17,9 +17,7 @@ static __always_inline u64 u64_eq_mask(u64 x, u64 y) static __always_inline u64 u64_gte_mask(u64 x, u64 y) { - u64 low63 = ~((u64)((s64)((s64)(x & 0x7fffffffffffffffLLU) - (s64)(y & 0x7fffffffffffffffLLU)) >> 63)); - u64 high_bit = ~((u64)((s64)((s64)(x & 0x8000000000000000LLU) - (s64)(y & 0x8000000000000000LLU)) >> 63)); - return low63 & high_bit; + return ((x ^ ((x ^ y) | ((x - y) ^ y))) >> 63) - 1; } static __always_inline void modulo_carry_top(u64 *b) |