Fix make checkheaders.
[libav.git] / libavcodec / ppc / gcc_fixes.h
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1/*
2 * gcc fixes for altivec.
115329f1 3 * Used to workaround broken gcc (FSF gcc-3 pre gcc-3.3)
a9a07762 4 * and to stay somewhat compatible with Darwin.
04d7f601 5 *
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6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
b78e7197 11 * version 2.1 of the License, or (at your option) any later version.
04d7f601 12 *
b78e7197 13 * FFmpeg is distributed in the hope that it will be useful,
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14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
b78e7197 19 * License along with FFmpeg; if not, write to the Free Software
04d7f601 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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21 */
22
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23#ifndef FFMPEG_GCC_FIXES_H
24#define FFMPEG_GCC_FIXES_H
a9a07762 25
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26#include "config.h"
27
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28#ifdef HAVE_ALTIVEC_H
29#include <altivec.h>
30#endif
31
a01e08ee 32#if (__GNUC__ < 4)
a01e08ee 33# define REG_v(a)
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34#else
35# define REG_v(a) asm ( #a )
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36#endif
37
115329f1 38#if (__GNUC__ * 100 + __GNUC_MINOR__ < 303)
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39
40/* This code was provided to me by Bartosch Pixa
41 * as a separate header file (broken_mergel.h).
42 * thanks to lu_zero for the workaround.
43 *
44 * See this mail for more information:
45 * http://gcc.gnu.org/ml/gcc/2003-04/msg00967.html
46 */
47
782b80d9 48static inline vector signed char ff_vmrglb (vector signed char const A,
bb270c08 49 vector signed char const B)
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50{
51 static const vector unsigned char lowbyte = {
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52 0x08, 0x18, 0x09, 0x19, 0x0a, 0x1a, 0x0b, 0x1b,
53 0x0c, 0x1c, 0x0d, 0x1d, 0x0e, 0x1e, 0x0f, 0x1f
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54 };
55 return vec_perm (A, B, lowbyte);
56}
57
782b80d9 58static inline vector signed short ff_vmrglh (vector signed short const A,
bb270c08 59 vector signed short const B)
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60{
61 static const vector unsigned char lowhalf = {
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62 0x08, 0x09, 0x18, 0x19, 0x0a, 0x0b, 0x1a, 0x1b,
63 0x0c, 0x0d, 0x1c, 0x1d, 0x0e, 0x0f, 0x1e, 0x1f
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64 };
65 return vec_perm (A, B, lowhalf);
66}
67
782b80d9 68static inline vector signed int ff_vmrglw (vector signed int const A,
bb270c08 69 vector signed int const B)
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70{
71 static const vector unsigned char lowword = {
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72 0x08, 0x09, 0x0a, 0x0b, 0x18, 0x19, 0x1a, 0x1b,
73 0x0c, 0x0d, 0x0e, 0x0f, 0x1c, 0x1d, 0x1e, 0x1f
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74 };
75 return vec_perm (A, B, lowword);
76}
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77/*#define ff_vmrglb ff_vmrglb
78#define ff_vmrglh ff_vmrglh
79#define ff_vmrglw ff_vmrglw
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80*/
81#undef vec_mergel
82
83#define vec_mergel(a1, a2) \
84__ch (__bin_args_eq (vector signed char, (a1), vector signed char, (a2)), \
782b80d9 85 ((vector signed char) ff_vmrglb ((vector signed char) (a1), (vector signed char) (a2))), \
a9a07762 86__ch (__bin_args_eq (vector unsigned char, (a1), vector unsigned char, (a2)), \
782b80d9 87 ((vector unsigned char) ff_vmrglb ((vector signed char) (a1), (vector signed char) (a2))), \
a9a07762 88__ch (__bin_args_eq (vector signed short, (a1), vector signed short, (a2)), \
782b80d9 89 ((vector signed short) ff_vmrglh ((vector signed short) (a1), (vector signed short) (a2))), \
a9a07762 90__ch (__bin_args_eq (vector unsigned short, (a1), vector unsigned short, (a2)), \
782b80d9 91 ((vector unsigned short) ff_vmrglh ((vector signed short) (a1), (vector signed short) (a2))), \
a9a07762 92__ch (__bin_args_eq (vector float, (a1), vector float, (a2)), \
782b80d9 93 ((vector float) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
a9a07762 94__ch (__bin_args_eq (vector signed int, (a1), vector signed int, (a2)), \
782b80d9 95 ((vector signed int) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
a9a07762 96__ch (__bin_args_eq (vector unsigned int, (a1), vector unsigned int, (a2)), \
782b80d9 97 ((vector unsigned int) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
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98 __altivec_link_error_invalid_argument ())))))))
99
100#endif
101
5b21bdab 102#endif /* FFMPEG_GCC_FIXES_H */