1/*
2 * gcc fixes for altivec.
3 * Used to workaround broken gcc (FSF gcc-3 pre gcc-3.3)
4 * and to stay somewhat compatible with Darwin.
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
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
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23#ifndef AVCODEC_PPC_GCC_FIXES_H
24#define AVCODEC_PPC_GCC_FIXES_H
25
26#include "config.h"
27
28#if HAVE_ALTIVEC_H
29#include <altivec.h>
30#endif
31
32#if (__GNUC__ < 4)
33# define REG_v(a)
34#else
35# define REG_v(a) __asm__ ( #a )
36#endif
37
38#if (__GNUC__ == 3 && __GNUC_MINOR__ < 3)
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
48static inline vector signed char ff_vmrglb (vector signed char const A,
49                                          vector signed char const B)
50{
51    static const vector unsigned char lowbyte = {
52        0x08, 0x18, 0x09, 0x19, 0x0a, 0x1a, 0x0b,  0x1b,
53        0x0c, 0x1c, 0x0d, 0x1d, 0x0e, 0x1e, 0x0f, 0x1f
54    };
55    return vec_perm (A, B, lowbyte);
56}
57
58static inline vector signed short ff_vmrglh (vector signed short const A,
59                                          vector signed short const B)
60{
61    static const vector unsigned char lowhalf = {
62        0x08, 0x09, 0x18, 0x19, 0x0a, 0x0b, 0x1a, 0x1b,
63        0x0c, 0x0d, 0x1c, 0x1d, 0x0e, 0x0f, 0x1e, 0x1f
64    };
65    return vec_perm (A, B, lowhalf);
66}
67
68static inline vector signed int ff_vmrglw (vector signed int const A,
69                                          vector signed int const B)
70{
71    static const vector unsigned char lowword = {
72        0x08, 0x09, 0x0a, 0x0b, 0x18, 0x19, 0x1a, 0x1b,
73        0x0c, 0x0d, 0x0e, 0x0f, 0x1c, 0x1d, 0x1e, 0x1f
74    };
75    return vec_perm (A, B, lowword);
76}
77/*#define ff_vmrglb ff_vmrglb
78#define ff_vmrglh ff_vmrglh
79#define ff_vmrglw ff_vmrglw
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)), \
85      ((vector signed char) ff_vmrglb ((vector signed char) (a1), (vector signed char) (a2))), \
86__ch (__bin_args_eq (vector unsigned char, (a1), vector unsigned char, (a2)), \
87      ((vector unsigned char) ff_vmrglb ((vector signed char) (a1), (vector signed char) (a2))), \
88__ch (__bin_args_eq (vector signed short, (a1), vector signed short, (a2)), \
89      ((vector signed short) ff_vmrglh ((vector signed short) (a1), (vector signed short) (a2))), \
90__ch (__bin_args_eq (vector unsigned short, (a1), vector unsigned short, (a2)), \
91      ((vector unsigned short) ff_vmrglh ((vector signed short) (a1), (vector signed short) (a2))), \
92__ch (__bin_args_eq (vector float, (a1), vector float, (a2)), \
93      ((vector float) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
94__ch (__bin_args_eq (vector signed int, (a1), vector signed int, (a2)), \
95      ((vector signed int) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
96__ch (__bin_args_eq (vector unsigned int, (a1), vector unsigned int, (a2)), \
97      ((vector unsigned int) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
98    __altivec_link_error_invalid_argument ())))))))
99
100#endif /* (__GNUC__ == 3 && __GNUC_MINOR__ < 3) */
101
102#endif /* AVCODEC_PPC_GCC_FIXES_H */
103