1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #ifndef _ASM_BITMAP_H
28 #define _ASM_BITMAP_H
29
30 #pragma ident "%Z%%M% %I% %E% SMI"
31
32 #include <sys/types.h>
33
34 #ifdef __cplusplus
35 extern "C" {
36 #endif
37
38 #if !defined(__lint) && defined(__GNUC__)
39
40 extern __inline__ int
highbit(ulong_t i)41 highbit(ulong_t i)
42 {
43 long __value = -1l;
44
45 #if defined(__amd64)
46 __asm__(
47 "bsrq %1,%0"
48 : "+r" (__value)
49 : "r" (i)
50 : "cc");
51 #elif defined(__i386)
52 __asm__(
53 "bsrl %1,%0"
54 : "+r" (__value)
55 : "r" (i)
56 : "cc");
57 #else
58 #error "port me"
59 #endif
60 return ((int)(__value + 1));
61 }
62
63 extern __inline__ int
lowbit(ulong_t i)64 lowbit(ulong_t i)
65 {
66 long __value = -1l;
67
68 #if defined(__amd64)
69 __asm__(
70 "bsfq %1,%0"
71 : "+r" (__value)
72 : "r" (i)
73 : "cc");
74 #elif defined(__i386)
75 __asm__(
76 "bsfl %1,%0"
77 : "+r" (__value)
78 : "r" (i)
79 : "cc");
80 #else
81 #error "port me"
82 #endif
83 return ((int)(__value + 1));
84 }
85
86 extern __inline__ uint_t
atomic_btr32(uint32_t * memory,uint_t bitnum)87 atomic_btr32(uint32_t *memory, uint_t bitnum)
88 {
89 uint8_t __value;
90
91 #if defined(__amd64)
92 __asm__ __volatile__(
93 "lock;"
94 "btrl %2, (%0);"
95 "setc %1"
96 : "+r" (memory), "+r" (__value)
97 : "ir" (bitnum)
98 : "cc");
99 #elif defined(__i386)
100 __asm__ __volatile__(
101 "lock;"
102 "btrl %2, (%0);"
103 "setc %1"
104 : "+r" (memory), "=r" (__value)
105 : "ir" (bitnum)
106 : "cc");
107 #else
108 #error "port me"
109 #endif
110 return ((uint_t)__value);
111 }
112
113 #endif /* !__lint && __GNUC__ */
114
115 #ifdef __cplusplus
116 }
117 #endif
118
119 #endif /* _ASM_BITMAP_H */
120