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 #include <sys/ccompile.h>
31 #include <sys/types.h>
32
33 #ifdef __cplusplus
34 extern "C" {
35 #endif
36
37 #if !defined(__lint) && defined(__GNUC__)
38
39 extern __GNU_INLINE int
40 highbit(ulong_t i)
41 {
42 long __value = -1l;
43
44 #if defined(__amd64)
45 __asm__(
46 "bsrq %1,%0"
47 : "+r" (__value)
48 : "r" (i)
49 : "cc");
50 #elif defined(__i386)
51 __asm__(
52 "bsrl %1,%0"
53 : "+r" (__value)
54 : "r" (i)
55 : "cc");
56 #else
57 #error "port me"
58 #endif
59 return ((int)(__value + 1));
60 }
61
62 extern __GNU_INLINE int
63 lowbit(ulong_t i)
64 {
65 long __value = -1l;
66
67 #if defined(__amd64)
68 __asm__(
69 "bsfq %1,%0"
70 : "+r" (__value)
71 : "r" (i)
72 : "cc");
73 #elif defined(__i386)
74 __asm__(
75 "bsfl %1,%0"
76 : "+r" (__value)
77 : "r" (i)
78 : "cc");
79 #else
80 #error "port me"
81 #endif
82 return ((int)(__value + 1));
83 }
84
85 extern __GNU_INLINE uint_t
86 atomic_btr32(uint32_t *memory, uint_t bitnum)
87 {
88 uint8_t __value;
89
90 #if defined(__amd64)
91 __asm__ __volatile__(
92 "lock;"
93 "btrl %2, (%0);"
94 "setc %1"
95 : "+r" (memory), "+r" (__value)
96 : "ir" (bitnum)
97 : "cc");
98 #elif defined(__i386)
99 __asm__ __volatile__(
100 "lock;"
101 "btrl %2, (%0);"
102 "setc %1"
103 : "+r" (memory), "=r" (__value)
104 : "ir" (bitnum)
105 : "cc");
106 #else
107 #error "port me"
108 #endif
109 return ((uint_t)__value);
110 }
111
112 #endif /* !__lint && __GNUC__ */
113
114 #ifdef __cplusplus
115 }
116 #endif
117
118 #endif /* _ASM_BITMAP_H */
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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 #include <sys/ccompile.h>
31 #include <sys/types.h>
32
33 #ifdef __cplusplus
34 extern "C" {
35 #endif
36
37 #if !defined(__lint) && defined(__GNUC__)
38
39 #if defined(__amd64)
40 #define __SUF "q"
41 #elif defined(__i386)
42 #define __SUF "l"
43 #else
44 #error "port me"
45 #endif
46
47 extern __GNU_INLINE int
48 highbit(ulong_t i)
49 {
50 long value = -1l;
51
52 __asm__(
53 "bsr" __SUF " %1,%0"
54 : "+r" (value)
55 : "r" (i)
56 : "cc");
57
58 return ((int)(value + 1));
59 }
60
61 extern __GNU_INLINE int
62 lowbit(ulong_t i)
63 {
64 long value = -1l;
65
66 __asm__(
67 "bsf" __SUF " %1,%0"
68 : "+r" (value)
69 : "r" (i)
70 : "cc");
71
72 return ((int)(value + 1));
73 }
74
75 extern __GNU_INLINE uint_t
76 atomic_btr32(uint32_t *memory, uint_t bitnum)
77 {
78 uint8_t value;
79
80 __asm__ __volatile__(
81 "lock;"
82 "btrl %2,%0;"
83 "setc %1"
84 : "+m" (*memory), "=r" (value)
85 : "ir" (bitnum)
86 : "cc");
87
88 return ((uint_t)value);
89 }
90
91 #undef __SUF
92
93 #endif /* !__lint && __GNUC__ */
94
95 #ifdef __cplusplus
96 }
97 #endif
98
99 #endif /* _ASM_BITMAP_H */
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