aboutsummaryrefslogtreecommitdiffstats
path: root/arch/sh/include/asm/bitops.h
blob: 450b5854d7c67b0c77ce71350f78603816ddb527 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_SH_BITOPS_H
#define __ASM_SH_BITOPS_H

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

/* For __swab32 */
#include <asm/byteorder.h>
#include <asm/barrier.h>

#ifdef CONFIG_GUSA_RB
#include <asm/bitops-grb.h>
#elif defined(CONFIG_CPU_SH2A)
#include <asm-generic/bitops/atomic.h>
#include <asm/bitops-op32.h>
#elif defined(CONFIG_CPU_SH4A)
#include <asm/bitops-llsc.h>
#elif defined(CONFIG_CPU_J2) && defined(CONFIG_SMP)
#include <asm/bitops-cas.h>
#else
#include <asm-generic/bitops/atomic.h>
#include <asm-generic/bitops/non-atomic.h>
#endif

static inline unsigned long ffz(unsigned long word)
{
	unsigned long result;

	__asm__("1:\n\t"
		"shlr	%1\n\t"
		"bt/s	1b\n\t"
		" add	#1, %0"
		: "=r" (result), "=r" (word)
		: "0" (~0L), "1" (word)
		: "t");
	return result;
}

/**
 * __ffs - find first bit in word.
 * @word: The word to search
 *
 * Undefined if no bit exists, so code should check against 0 first.
 */
static inline unsigned long __ffs(unsigned long word)
{
	unsigned long result;

	__asm__("1:\n\t"
		"shlr	%1\n\t"
		"bf/s	1b\n\t"
		" add	#1, %0"
		: "=r" (result), "=r" (word)
		: "0" (~0L), "1" (word)
		: "t");
	return result;
}

#include <asm-generic/bitops/find.h>
#include <asm-generic/bitops/ffs.h>
#include <asm-generic/bitops/hweight.h>
#include <asm-generic/bitops/lock.h>
#include <asm-generic/bitops/sched.h>
#include <asm-generic/bitops/le.h>
#include <asm-generic/bitops/ext2-atomic.h>
#include <asm-generic/bitops/fls.h>
#include <asm-generic/bitops/__fls.h>
#include <asm-generic/bitops/fls64.h>

#endif /* __ASM_SH_BITOPS_H */

Privacy Policy