optimization tips for the wavelet
[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
23#ifndef _GCC_FIXES_
24#define _GCC_FIXES_
25
26#ifdef HAVE_ALTIVEC_H
27#include <altivec.h>
28#endif
29
30#ifdef CONFIG_DARWIN
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31# ifndef __MWERKS__
32# define AVV(x...) (x)
33# else
34# define AVV
35# endif
a01e08ee 36#define REG_v(a) asm ( #a )
a9a07762 37#else
a01e08ee 38
a9a07762 39#define AVV(x...) {x}
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40
41#if (__GNUC__ < 4)
a01e08ee 42# define REG_v(a)
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43#else
44# define REG_v(a) asm ( #a )
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45#endif
46
115329f1 47#if (__GNUC__ * 100 + __GNUC_MINOR__ < 303)
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48
49/* This code was provided to me by Bartosch Pixa
50 * as a separate header file (broken_mergel.h).
51 * thanks to lu_zero for the workaround.
52 *
53 * See this mail for more information:
54 * http://gcc.gnu.org/ml/gcc/2003-04/msg00967.html
55 */
56
782b80d9 57static inline vector signed char ff_vmrglb (vector signed char const A,
bb270c08 58 vector signed char const B)
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59{
60 static const vector unsigned char lowbyte = {
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61 0x08, 0x18, 0x09, 0x19, 0x0a, 0x1a, 0x0b, 0x1b,
62 0x0c, 0x1c, 0x0d, 0x1d, 0x0e, 0x1e, 0x0f, 0x1f
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63 };
64 return vec_perm (A, B, lowbyte);
65}
66
782b80d9 67static inline vector signed short ff_vmrglh (vector signed short const A,
bb270c08 68 vector signed short const B)
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69{
70 static const vector unsigned char lowhalf = {
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71 0x08, 0x09, 0x18, 0x19, 0x0a, 0x0b, 0x1a, 0x1b,
72 0x0c, 0x0d, 0x1c, 0x1d, 0x0e, 0x0f, 0x1e, 0x1f
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73 };
74 return vec_perm (A, B, lowhalf);
75}
76
782b80d9 77static inline vector signed int ff_vmrglw (vector signed int const A,
bb270c08 78 vector signed int const B)
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79{
80 static const vector unsigned char lowword = {
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81 0x08, 0x09, 0x0a, 0x0b, 0x18, 0x19, 0x1a, 0x1b,
82 0x0c, 0x0d, 0x0e, 0x0f, 0x1c, 0x1d, 0x1e, 0x1f
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83 };
84 return vec_perm (A, B, lowword);
85}
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86/*#define ff_vmrglb ff_vmrglb
87#define ff_vmrglh ff_vmrglh
88#define ff_vmrglw ff_vmrglw
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89*/
90#undef vec_mergel
91
92#define vec_mergel(a1, a2) \
93__ch (__bin_args_eq (vector signed char, (a1), vector signed char, (a2)), \
782b80d9 94 ((vector signed char) ff_vmrglb ((vector signed char) (a1), (vector signed char) (a2))), \
a9a07762 95__ch (__bin_args_eq (vector unsigned char, (a1), vector unsigned char, (a2)), \
782b80d9 96 ((vector unsigned char) ff_vmrglb ((vector signed char) (a1), (vector signed char) (a2))), \
a9a07762 97__ch (__bin_args_eq (vector signed short, (a1), vector signed short, (a2)), \
782b80d9 98 ((vector signed short) ff_vmrglh ((vector signed short) (a1), (vector signed short) (a2))), \
a9a07762 99__ch (__bin_args_eq (vector unsigned short, (a1), vector unsigned short, (a2)), \
782b80d9 100 ((vector unsigned short) ff_vmrglh ((vector signed short) (a1), (vector signed short) (a2))), \
a9a07762 101__ch (__bin_args_eq (vector float, (a1), vector float, (a2)), \
782b80d9 102 ((vector float) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
a9a07762 103__ch (__bin_args_eq (vector signed int, (a1), vector signed int, (a2)), \
782b80d9 104 ((vector signed int) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
a9a07762 105__ch (__bin_args_eq (vector unsigned int, (a1), vector unsigned int, (a2)), \
782b80d9 106 ((vector unsigned int) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
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107 __altivec_link_error_invalid_argument ())))))))
108
109#endif
110
111#endif /* CONFIG_DARWIN */
112
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113#ifndef __MWERKS__
114#define const_vector const vector
115#else
116#define const_vector vector
117#endif
118
a9a07762 119#endif /* _GCC_FIXES_ */