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Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001/* SPDX-License-Identifier: GPL-2.0 */
Yalin Wang0b7857d2015-01-16 02:45:55 +01002#ifndef __ASM_BITREV_H
3#define __ASM_BITREV_H
4
5static __always_inline __attribute_const__ u32 __arch_bitrev32(u32 x)
6{
7 __asm__ ("rbit %0, %1" : "=r" (x) : "r" (x));
8 return x;
9}
10
11static __always_inline __attribute_const__ u16 __arch_bitrev16(u16 x)
12{
13 return __arch_bitrev32((u32)x) >> 16;
14}
15
16static __always_inline __attribute_const__ u8 __arch_bitrev8(u8 x)
17{
18 return __arch_bitrev32((u32)x) >> 24;
19}
20
21#endif