Import Curve 448 support
[openssl.git] / crypto / ec / curve448 / include / arch_ref64 / arch_intrinsics.h
1 /* Copyright (c) 2016 Cryptography Research, Inc.
2  * Released under the MIT License.  See LICENSE.txt for license information.
3  */
4
5 #ifndef __ARCH_REF64_ARCH_INTRINSICS_H__
6 #define __ARCH_REF64_ARCH_INTRINSICS_H__
7
8 #define ARCH_WORD_BITS 64
9
10 static __inline__ __attribute((always_inline,unused))
11 uint64_t word_is_zero(uint64_t a) {
12     /* let's hope the compiler isn't clever enough to optimize this. */
13     return (((__uint128_t)a)-1)>>64;
14 }
15
16 static __inline__ __attribute((always_inline,unused))
17 __uint128_t widemul(uint64_t a, uint64_t b) {
18     return ((__uint128_t)a) * b; 
19 }
20
21 #endif /* ARCH_REF64_ARCH_INTRINSICS_H__ */
22