Rename CONFIG_DARWIN to SYS_DARWIN, it is not configurable (in FFmpeg).
[libav.git] / libavcodec / ppc / gcc_fixes.h
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 GCC_FIXES_H
24 #define GCC_FIXES_H
25
26 #ifdef HAVE_ALTIVEC_H
27 #include <altivec.h>
28 #endif
29
30 #ifdef SYS_DARWIN
31 # ifndef __MWERKS__
32 # define AVV(x...) (x)
33 # else
34 # define AVV
35 # endif
36 #define REG_v(a) asm ( #a )
37 #else
38
39 #define AVV(x...) {x}
40
41 #if (__GNUC__ < 4)
42 # define REG_v(a)
43 #else
44 # define REG_v(a) asm ( #a )
45 #endif
46
47 #if (__GNUC__ * 100 + __GNUC_MINOR__ < 303)
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
57 static inline vector signed char ff_vmrglb (vector signed char const A,
58 vector signed char const B)
59 {
60 static const vector unsigned char lowbyte = {
61 0x08, 0x18, 0x09, 0x19, 0x0a, 0x1a, 0x0b, 0x1b,
62 0x0c, 0x1c, 0x0d, 0x1d, 0x0e, 0x1e, 0x0f, 0x1f
63 };
64 return vec_perm (A, B, lowbyte);
65 }
66
67 static inline vector signed short ff_vmrglh (vector signed short const A,
68 vector signed short const B)
69 {
70 static const vector unsigned char lowhalf = {
71 0x08, 0x09, 0x18, 0x19, 0x0a, 0x0b, 0x1a, 0x1b,
72 0x0c, 0x0d, 0x1c, 0x1d, 0x0e, 0x0f, 0x1e, 0x1f
73 };
74 return vec_perm (A, B, lowhalf);
75 }
76
77 static inline vector signed int ff_vmrglw (vector signed int const A,
78 vector signed int const B)
79 {
80 static const vector unsigned char lowword = {
81 0x08, 0x09, 0x0a, 0x0b, 0x18, 0x19, 0x1a, 0x1b,
82 0x0c, 0x0d, 0x0e, 0x0f, 0x1c, 0x1d, 0x1e, 0x1f
83 };
84 return vec_perm (A, B, lowword);
85 }
86 /*#define ff_vmrglb ff_vmrglb
87 #define ff_vmrglh ff_vmrglh
88 #define ff_vmrglw ff_vmrglw
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)), \
94 ((vector signed char) ff_vmrglb ((vector signed char) (a1), (vector signed char) (a2))), \
95 __ch (__bin_args_eq (vector unsigned char, (a1), vector unsigned char, (a2)), \
96 ((vector unsigned char) ff_vmrglb ((vector signed char) (a1), (vector signed char) (a2))), \
97 __ch (__bin_args_eq (vector signed short, (a1), vector signed short, (a2)), \
98 ((vector signed short) ff_vmrglh ((vector signed short) (a1), (vector signed short) (a2))), \
99 __ch (__bin_args_eq (vector unsigned short, (a1), vector unsigned short, (a2)), \
100 ((vector unsigned short) ff_vmrglh ((vector signed short) (a1), (vector signed short) (a2))), \
101 __ch (__bin_args_eq (vector float, (a1), vector float, (a2)), \
102 ((vector float) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
103 __ch (__bin_args_eq (vector signed int, (a1), vector signed int, (a2)), \
104 ((vector signed int) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
105 __ch (__bin_args_eq (vector unsigned int, (a1), vector unsigned int, (a2)), \
106 ((vector unsigned int) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
107 __altivec_link_error_invalid_argument ())))))))
108
109 #endif
110
111 #endif /* SYS_DARWIN */
112
113 #ifndef __MWERKS__
114 #define const_vector const vector
115 #else
116 #define const_vector vector
117 #endif
118
119 #endif /* GCC_FIXES_H */