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
119CK_CC_INLINE static int
120ck_cc_ffs(unsigned int x)
121{
122
123	return __builtin_ffsl(x);
124}
125
126#define CK_F_CC_FFSL
127CK_CC_INLINE static int
128ck_cc_ffsl(unsigned long x)
129{
130
131	return __builtin_ffsll(x);
132}
133
134#define CK_F_CC_CTZ
135CK_CC_INLINE static int
136ck_cc_ctz(unsigned int x)
137{
138
139	return __builtin_ctz(x);
140}
141
142#define CK_F_CC_POPCOUNT
143CK_CC_INLINE static int
144ck_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