1 /*
2 * Copyright 2009-2015 Samy Al Bahra.
3 * Copyright 2014 Paul Khuong.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #ifndef CK_GCC_CC_H
29 #define CK_GCC_CC_H
30
31 #include <ck_md.h>
32
33 #ifdef __SUNPRO_C
34 #define CK_CC_UNUSED
35 #define CK_CC_USED
36 #define CK_CC_IMM
37 #define CK_CC_IMM_U32
38 #else
39 #define CK_CC_UNUSED __attribute__((unused))
40 #define CK_CC_USED __attribute__((used))
41 #define CK_CC_IMM "i"
42
43 #define CK_CC_CONTAINER(F, T, M, N) \
44 CK_CC_INLINE static T * \
45 N(F *p) \
46 { \
47 \
48 return (T *)(void *)((char *)p - __builtin_offsetof(T, M)); \
49 }
50
51 #if defined(__x86_64__) || defined(__x86__)
52 #define CK_CC_IMM_U32 "Z"
53 #define CK_CC_IMM_S32 "e"
54 #else
55 #define CK_CC_IMM_U32 CK_CC_IMM
56 #define CK_CC_IMM_S32 CK_CC_IMM
57 #endif /* __x86_64__ || __x86__ */
58 #endif
59
60 #ifdef __OPTIMIZE__
61 #define CK_CC_INLINE CK_CC_UNUSED inline
62 #else
63 #define CK_CC_INLINE CK_CC_UNUSED
64 #endif
65
66 #define CK_CC_FORCE_INLINE CK_CC_UNUSED __attribute__((always_inline)) inline
67 #define CK_CC_RESTRICT __restrict__
68
69 /*
70 * Packed attribute.
71 */
72 #define CK_CC_PACKED __attribute__((packed))
73
74 /*
75 * Weak reference.
76 */
77 #define CK_CC_WEAKREF __attribute__((weakref))
78
79 /*
80 * Alignment attribute.
81 */
82 #define CK_CC_ALIGN(B) __attribute__((aligned(B)))
83
84 /*
85 * Cache align.
86 */
87 #define CK_CC_CACHELINE CK_CC_ALIGN(CK_MD_CACHELINE)
88
89 /*
90 * These are functions which should be avoided.
91 */
92 #ifdef __freestanding__
93 #pragma GCC poison malloc free
94 #endif
95
96 /*
97 * Branch execution hints.
98 */
99 #define CK_CC_LIKELY(x) (__builtin_expect(!!(x), 1))
100 #define CK_CC_UNLIKELY(x) (__builtin_expect(!!(x), 0))
101
102 /*
103 * Some compilers are overly strict regarding aliasing semantics.
104 * Unfortunately, in many cases it makes more sense to pay aliasing
105 * cost rather than overly expensive register spillage.
106 */
107 #define CK_CC_ALIASED __attribute__((__may_alias__))
108
109 /*
110 * Compile-time typeof
111 */
112 #define CK_CC_TYPEOF(X, DEFAULT) __typeof__(X)
113
114 /*
115 * Portability wrappers for bitwise operations.
116 */
117 #ifndef CK_MD_CC_BUILTIN_DISABLE
118 #define CK_F_CC_FFS
119 CK_CC_INLINE static int
ck_cc_ffs(unsigned int x)120 ck_cc_ffs(unsigned int x)
121 {
122
123 return __builtin_ffsl(x);
124 }
125
126 #define CK_F_CC_FFSL
127 CK_CC_INLINE static int
ck_cc_ffsl(unsigned long x)128 ck_cc_ffsl(unsigned long x)
129 {
130
131 return __builtin_ffsll(x);
132 }
133
134 #define CK_F_CC_CTZ
135 CK_CC_INLINE static int
ck_cc_ctz(unsigned int x)136 ck_cc_ctz(unsigned int x)
137 {
138
139 return __builtin_ctz(x);
140 }
141
142 #define CK_F_CC_POPCOUNT
143 CK_CC_INLINE static int
ck_cc_popcount(unsigned int x)144 ck_cc_popcount(unsigned int x)
145 {
146
147 return __builtin_popcount(x);
148 }
149 #endif /* CK_MD_CC_BUILTIN_DISABLE */
150 #endif /* CK_GCC_CC_H */
151