compiler.h revision 03b705cf 
1/*
2 * Copyright (c) 2011 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 *
23 * Authors:
24 *    Chris Wilson <chris@chris-wilson.co.uk>
25 *
26 */
27
28#ifndef _SNA_COMPILER_H_
29#define _SNA_COMPILER_H_
30
31#if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
32#define likely(expr) (__builtin_expect (!!(expr), 1))
33#define unlikely(expr) (__builtin_expect (!!(expr), 0))
34#define noinline __attribute__((noinline))
35#define force_inline inline __attribute__((always_inline))
36#define fastcall __attribute__((regparm(3)))
37#define must_check __attribute__((warn_unused_result))
38#define constant __attribute__((const))
39#define pure __attribute__((pure))
40#define tightly_packed __attribute__((__packed__))
41#define flatten __attribute__((flatten))
42#define page_aligned __attribute__((aligned(4096)))
43#else
44#define likely(expr) (expr)
45#define unlikely(expr) (expr)
46#define noinline
47#define force_inline inline
48#define fastcall
49#define must_check
50#define constant
51#define pure
52#define tighly_packed
53#define flatten
54#define page_aligned
55#endif
56
57#define HAS_GCC(major, minor) defined(__GNUC__) && (__GNUC__ > (major) || __GNUC__ == (major) && __GNUC_MINOR__ >= (minor))
58
59#if HAS_GCC(4, 5)
60#define sse2 __attribute__((target("sse2,fpmath=sse")))
61#define sse4_2 __attribute__((target("sse4.2,sse2,fpmath=sse")))
62#endif
63
64#if HAS_GCC(4, 7)
65#define avx2 __attribute__((target("avx2,sse4.2,sse2,fpmath=sse")))
66#endif
67
68#if HAS_GCC(4, 6) && defined(__OPTIMIZE__)
69#define fast __attribute__((optimize("Ofast")))
70#else
71#define fast
72#endif
73
74#if HAS_GCC(4, 6) && defined(__OPTIMIZE__)
75#define fast_memcpy __attribute__((optimize("Ofast"))) __attribute__((target("inline-all-stringops")))
76#elif HAS_GCC(4, 5) && defined(__OPTIMIZE__)
77#define fast_memcpy __attribute__((target("inline-all-stringops")))
78#else
79#define fast_memcpy
80#endif
81
82#ifdef HAVE_VALGRIND
83#define VG(x) x
84#else
85#define VG(x)
86#endif
87
88#define VG_CLEAR(s) VG(memset(&s, 0, sizeof(s)))
89
90#define COMPILE_TIME_ASSERT(E) ((void)sizeof(char[1 - 2*!(E)]))
91
92#endif /* _SNA_COMPILER_H_ */
93