https://github.com/torvalds/linux
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Tip revision: b953c0d234bc72e8489d3bf51a276c5c4ec85345 authored by Linus Torvalds on 22 June 2015, 05:05:43 UTC
Linux 4.1
Tip revision: b953c0d
bitrev.h
#ifndef __ASM_BITREV_H
#define __ASM_BITREV_H

static __always_inline __attribute_const__ u32 __arch_bitrev32(u32 x)
{
	__asm__ ("rbit %0, %1" : "=r" (x) : "r" (x));
	return x;
}

static __always_inline __attribute_const__ u16 __arch_bitrev16(u16 x)
{
	return __arch_bitrev32((u32)x) >> 16;
}

static __always_inline __attribute_const__ u8 __arch_bitrev8(u8 x)
{
	return __arch_bitrev32((u32)x) >> 24;
}

#endif
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