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License cleanup: add SPDX GPL-2.0 license identifier to files with no license
[thirdparty/kernel/linux.git] / arch / arm / include / asm / bitrev.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_BITREV_H
3 #define __ASM_BITREV_H
4
5 static __always_inline __attribute_const__ u32 __arch_bitrev32(u32 x)
6 {
7 __asm__ ("rbit %0, %1" : "=r" (x) : "r" (x));
8 return x;
9 }
10
11 static __always_inline __attribute_const__ u16 __arch_bitrev16(u16 x)
12 {
13 return __arch_bitrev32((u32)x) >> 16;
14 }
15
16 static __always_inline __attribute_const__ u8 __arch_bitrev8(u8 x)
17 {
18 return __arch_bitrev32((u32)x) >> 24;
19 }
20
21 #endif