crypto/ec/curve448/arch_32/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_ARCH_32_ARCH_INTRINSICS_H__
   6 #define __ARCH_ARCH_32_ARCH_INTRINSICS_H__
   7
   8 #define ARCH_WORD_BITS 32
   9
  10 static __inline__ __attribute((always_inline,unused))
  11 uint32_t word_is_zero(uint32_t a) {
  12     /* let's hope the compiler isn't clever enough to optimize this. */
  13     return (((uint64_t)a)-1)>>32;
  14 }
  15
  16 static __inline__ __attribute((always_inline,unused))
  17 uint64_t widemul(uint32_t a, uint32_t b) {
  18     return ((uint64_t)a) * b;
  19 }
  20
  21 #endif /* __ARCH_ARM_32_ARCH_INTRINSICS_H__ */
  22