25 lines
717 B
C
25 lines
717 B
C
|
/* Copyright (c) 2016 Cryptography Research, Inc.
|
||
|
|
* Released under the MIT License. See LICENSE.txt for license information.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __ARCH_NEON_ARCH_INTRINSICS_H__
|
||
|
|
#define __ARCH_NEON_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_NEON_ARCH_INTRINSICS_H__ */
|
||
|
|
|