blob: 7451c6fe7dd6b276a7e66da086848350d641cf06 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
/* Copyright (c) 2016 Cryptography Research, Inc.
* Released under the MIT License. See LICENSE.txt for license information.
*/
#ifndef __ARCH_ARM_32_ARCH_INTRINSICS_H__
#define __ARCH_ARM_32_ARCH_INTRINSICS_H__
#define ARCH_WORD_BITS 32
static __inline__ __attribute((always_inline,unused))
uint32_t word_is_zero(uint32_t a) {
uint32_t ret;
asm("subs %0, %1, #1;\n\tsbc %0, %0, %0" : "=r"(ret) : "r"(a) : "cc");
return ret;
}
static __inline__ __attribute((always_inline,unused))
uint64_t widemul(uint32_t a, uint32_t b) {
/* Could be UMULL, but it's hard to express to CC that the registers must be different */
return ((uint64_t)a) * b;
}
#endif /* __ARCH_ARM_32_ARCH_INTRINSICS_H__ */
|
