1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_BITREV_H
3 #define __ASM_BITREV_H
4 static __always_inline __attribute_const__ u32 __arch_bitrev32(u32 x)
5 {
6 __asm__ ("rbit %w0, %w1" : "=r" (x) : "r" (x));
7 return x;
8 }
9
10 static __always_inline __attribute_const__ u16 __arch_bitrev16(u16 x)
11 {
12 return __arch_bitrev32((u32)x) >> 16;
13 }
14
15 static __always_inline __attribute_const__ u8 __arch_bitrev8(u8 x)
16 {
17 return __arch_bitrev32((u32)x) >> 24;
18 }
19
20 #endif
21
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