xref: /linux/arch/arm/include/asm/bitrev.h (revision c532de5a67a70f8533d495f8f2aaa9a0491c3ad0)
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
22