curve448: Use constant time zero check function
#ifndef OSSL_CRYPTO_EC_CURVE448_ARCH_64_INTRINSICS_H
# define OSSL_CRYPTO_EC_CURVE448_ARCH_64_INTRINSICS_H
+# include "internal/constant_time.h"
+
# define ARCH_WORD_BITS 64
-static ossl_inline uint64_t word_is_zero(uint64_t a)
-{
- /* let's hope the compiler isn't clever enough to optimize this. */
- return (((__uint128_t) a) - 1) >> 64;
-}
+# define word_is_zero(a) constant_time_is_zero_64(a)
static ossl_inline uint128_t widemul(uint64_t a, uint64_t b)
{
