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

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#ifndef __ASM_SH_BITOPS_H

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#define __ASM_SH_BITOPS_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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/* For __swab32 */

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#include <asm/byteorder.h>

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#include <asm/barrier.h>

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#ifdef CONFIG_GUSA_RB

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#include <asm/bitops-grb.h>

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#elif defined(CONFIG_CPU_SH2A)

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

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#include <asm/bitops-op32.h>

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#elif defined(CONFIG_CPU_SH4A)

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#include <asm/bitops-llsc.h>

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#elif defined(CONFIG_CPU_J2) && defined(CONFIG_SMP)

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#include <asm/bitops-cas.h>

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#else

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

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

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#endif

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static inline unsigned long ffz(unsigned long word)

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{

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	unsigned long result;

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	__asm__("1:\n\t"

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		"shlr	%1\n\t"

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		"bt/s	1b\n\t"

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		" add	#1, %0"

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		: "=r" (result), "=r" (word)

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		: "0" (~0L), "1" (word)

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		: "t");

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	return result;

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}

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/**

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 * __ffs - find first bit in word.

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 * @word: The word to search

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 *

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 * Undefined if no bit exists, so code should check against 0 first.

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 */

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static inline unsigned long __ffs(unsigned long word)

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{

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	unsigned long result;

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	__asm__("1:\n\t"

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		"shlr	%1\n\t"

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		"bf/s	1b\n\t"

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		" add	#1, %0"

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		: "=r" (result), "=r" (word)

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		: "0" (~0L), "1" (word)

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		: "t");

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	return result;

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}

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

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

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

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

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

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

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#endif /* __ASM_SH_BITOPS_H */

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