2 * Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright 2016 Cryptography Research, Inc.
5 * Licensed under the OpenSSL license (the "License"). You may not use
6 * this file except in compliance with the License. You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
10 * Originally written by Mike Hamburg
13 #ifndef __ARCH_NEON_ARCH_INTRINSICS_H__
14 #define __ARCH_NEON_ARCH_INTRINSICS_H__
16 #define ARCH_WORD_BITS 32
18 static __inline__ __attribute((always_inline,unused))
19 uint32_t word_is_zero(uint32_t a) {
21 __asm__("subs %0, %1, #1;\n\tsbc %0, %0, %0" : "=r"(ret) : "r"(a) : "cc");
25 static __inline__ __attribute((always_inline,unused))
26 uint64_t widemul(uint32_t a, uint32_t b) {
27 /* Could be UMULL, but it's hard to express to CC that the registers must be different */
28 return ((uint64_t)a) * b;
31 #endif /* __ARCH_NEON_ARCH_INTRINSICS_H__ */