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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/csky/include/asm/bitops.h
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/* SPDX-License-Identifier: GPL-2.0 */

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#ifndef __ASM_CSKY_BITOPS_H

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#define __ASM_CSKY_BITOPS_H

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#include <linux/compiler.h>

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#include <asm/barrier.h>

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/*

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 * asm-generic/bitops/ffs.h

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 */

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static inline int ffs(int x)

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{

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	if (!x)

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		return 0;

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	asm volatile (

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		"brev %0\n"

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		"ff1  %0\n"

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		"addi %0, 1\n"

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		: "=&r"(x)

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		: "0"(x));

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	return x;

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}

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/*

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 * asm-generic/bitops/__ffs.h

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 */

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static __always_inline unsigned long __ffs(unsigned long x)

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{

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	asm volatile (

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		"brev %0\n"

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		"ff1  %0\n"

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		: "=&r"(x)

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		: "0"(x));

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	return x;

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}

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/*

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 * asm-generic/bitops/fls.h

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 */

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static __always_inline int fls(unsigned int x)

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{

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	asm volatile(

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		"ff1 %0\n"

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		: "=&r"(x)

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		: "0"(x));

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	return (32 - x);

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}

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/*

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 * asm-generic/bitops/__fls.h

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 */

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static __always_inline unsigned long __fls(unsigned long x)

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{

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	return fls(x) - 1;

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}

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#include <asm-generic/bitops/ffz.h>

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#include <asm-generic/bitops/fls64.h>

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#ifndef _LINUX_BITOPS_H

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#error only <linux/bitops.h> can be included directly

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#endif

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#include <asm-generic/bitops/sched.h>

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#include <asm-generic/bitops/hweight.h>

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#include <asm-generic/bitops/lock.h>

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#include <asm-generic/bitops/atomic.h>

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/*

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 * bug fix, why only could use atomic!!!!

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 */

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#include <asm-generic/bitops/non-atomic.h>

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#include <asm-generic/bitops/le.h>

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#include <asm-generic/bitops/ext2-atomic.h>

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#endif /* __ASM_CSKY_BITOPS_H */

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