1/*
2 *  Port on Texas Instruments TMS320C6x architecture
3 *
4 *  Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated
5 *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
6 *
7 *  This program is free software; you can redistribute it and/or modify
8 *  it under the terms of the GNU General Public License version 2 as
9 *  published by the Free Software Foundation.
10 */
11#ifndef _ASM_C6X_BITOPS_H
12#define _ASM_C6X_BITOPS_H
13
14#ifdef __KERNEL__
15
16#include <linux/bitops.h>
17#include <asm/byteorder.h>
18#include <asm/barrier.h>
19
20/*
21 * We are lucky, DSP is perfect for bitops: do it in 3 cycles
22 */
23
24/**
25 * __ffs - find first bit in word.
26 * @word: The word to search
27 *
28 * Undefined if no bit exists, so code should check against 0 first.
29 * Note __ffs(0) = undef, __ffs(1) = 0, __ffs(0x80000000) = 31.
30 *
31 */
32static inline unsigned long __ffs(unsigned long x)
33{
34	asm (" bitr  .M1  %0,%0\n"
35	     " nop\n"
36	     " lmbd  .L1  1,%0,%0\n"
37	     : "+a"(x));
38
39	return x;
40}
41
42/*
43 * ffz - find first zero in word.
44 * @word: The word to search
45 *
46 * Undefined if no zero exists, so code should check against ~0UL first.
47 */
48#define ffz(x) __ffs(~(x))
49
50/**
51 * fls - find last (most-significant) bit set
52 * @x: the word to search
53 *
54 * This is defined the same way as ffs.
55 * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
56 */
57static inline int fls(int x)
58{
59	if (!x)
60		return 0;
61
62	asm (" lmbd  .L1  1,%0,%0\n" : "+a"(x));
63
64	return 32 - x;
65}
66
67/**
68 * ffs - find first bit set
69 * @x: the word to search
70 *
71 * This is defined the same way as
72 * the libc and compiler builtin ffs routines, therefore
73 * differs in spirit from the above ffz (man ffs).
74 * Note ffs(0) = 0, ffs(1) = 1, ffs(0x80000000) = 32.
75 */
76static inline int ffs(int x)
77{
78	if (!x)
79		return 0;
80
81	return __ffs(x) + 1;
82}
83
84#include <asm-generic/bitops/__fls.h>
85#include <asm-generic/bitops/fls64.h>
86#include <asm-generic/bitops/find.h>
87
88#include <asm-generic/bitops/sched.h>
89#include <asm-generic/bitops/hweight.h>
90#include <asm-generic/bitops/lock.h>
91
92#include <asm-generic/bitops/atomic.h>
93#include <asm-generic/bitops/non-atomic.h>
94#include <asm-generic/bitops/le.h>
95#include <asm-generic/bitops/ext2-atomic.h>
96
97#endif /* __KERNEL__ */
98#endif /* _ASM_C6X_BITOPS_H */
99