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 nonnull __attribute__((nonnull))
43#define page_aligned __attribute__((aligned(4096)))
44#else
45#define likely(expr) (expr)
46#define unlikely(expr) (expr)
47#define noinline
48#define force_inline inline
49#define fastcall
50#define must_check
51#define constant
52#define pure
53#define tighly_packed
54#define flatten
55#define nonnull
56#define page_aligned
57#endif
58
59#define HAS_GCC(major, minor) defined(__GNUC__) && (__GNUC__ > (major) || __GNUC__ == (major) && __GNUC_MINOR__ >= (minor))
60
61#if HAS_GCC(4, 5)
62#define sse2 fast __attribute__((target("sse2,fpmath=sse")))
63#define sse4_2 fast __attribute__((target("sse4.2,sse2,fpmath=sse")))
64#endif
65
66#if HAS_GCC(4, 6) && defined(__OPTIMIZE__)
67#define fast __attribute__((optimize("Ofast")))
68#else
69#define fast
70#endif
71
72#if HAS_GCC(4, 7)
73#define avx2 fast __attribute__((target("avx2,avx,sse4.2,sse2,fpmath=sse")))
74#define assume_aligned(ptr, align) __builtin_assume_aligned((ptr), (align))
75#define assume_misaligned(ptr, align, offset) __builtin_assume_aligned((ptr), (align), (offset))
76#else
77#define assume_aligned(ptr, align) (ptr)
78#define assume_misaligned(ptr, align, offset) (ptr)
79#endif
80
81#if HAS_GCC(4, 5) && defined(__OPTIMIZE__)
82#define fast_memcpy fast __attribute__((target("inline-all-stringops")))
83#else
84#define fast_memcpy
85#endif
86
87#ifdef HAVE_VALGRIND
88#define VG(x) x
89#else
90#define VG(x)
91#endif
92
93#define VG_CLEAR(s) VG(memset(&s, 0, sizeof(s)))
94
95#define COMPILE_TIME_ASSERT(E) ((void)sizeof(char[1 - 2*!(E)]))
96
97#endif /* _SNA_COMPILER_H_ */
98