Reportedly FFmpeg fails to compile on Cygwin with vhook enabled, but FFserver
[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)
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4 * and to stay somewhat compatible with Darwin.
5 */
6
7#ifndef _GCC_FIXES_
8#define _GCC_FIXES_
9
10#ifdef HAVE_ALTIVEC_H
11#include <altivec.h>
12#endif
13
14#ifdef CONFIG_DARWIN
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15# ifndef __MWERKS__
16# define AVV(x...) (x)
17# else
18# define AVV
19# endif
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20#else
21#define AVV(x...) {x}
115329f1 22#if (__GNUC__ * 100 + __GNUC_MINOR__ < 303)
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23
24/* This code was provided to me by Bartosch Pixa
25 * as a separate header file (broken_mergel.h).
26 * thanks to lu_zero for the workaround.
27 *
28 * See this mail for more information:
29 * http://gcc.gnu.org/ml/gcc/2003-04/msg00967.html
30 */
31
782b80d9 32static inline vector signed char ff_vmrglb (vector signed char const A,
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33 vector signed char const B)
34{
35 static const vector unsigned char lowbyte = {
36 0x08, 0x18, 0x09, 0x19, 0x0a, 0x1a, 0x0b, 0x1b,
37 0x0c, 0x1c, 0x0d, 0x1d, 0x0e, 0x1e, 0x0f, 0x1f
38 };
39 return vec_perm (A, B, lowbyte);
40}
41
782b80d9 42static inline vector signed short ff_vmrglh (vector signed short const A,
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43 vector signed short const B)
44{
45 static const vector unsigned char lowhalf = {
46 0x08, 0x09, 0x18, 0x19, 0x0a, 0x0b, 0x1a, 0x1b,
47 0x0c, 0x0d, 0x1c, 0x1d, 0x0e, 0x0f, 0x1e, 0x1f
48 };
49 return vec_perm (A, B, lowhalf);
50}
51
782b80d9 52static inline vector signed int ff_vmrglw (vector signed int const A,
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53 vector signed int const B)
54{
55 static const vector unsigned char lowword = {
56 0x08, 0x09, 0x0a, 0x0b, 0x18, 0x19, 0x1a, 0x1b,
57 0x0c, 0x0d, 0x0e, 0x0f, 0x1c, 0x1d, 0x1e, 0x1f
58 };
59 return vec_perm (A, B, lowword);
60}
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61/*#define ff_vmrglb ff_vmrglb
62#define ff_vmrglh ff_vmrglh
63#define ff_vmrglw ff_vmrglw
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64*/
65#undef vec_mergel
66
67#define vec_mergel(a1, a2) \
68__ch (__bin_args_eq (vector signed char, (a1), vector signed char, (a2)), \
782b80d9 69 ((vector signed char) ff_vmrglb ((vector signed char) (a1), (vector signed char) (a2))), \
a9a07762 70__ch (__bin_args_eq (vector unsigned char, (a1), vector unsigned char, (a2)), \
782b80d9 71 ((vector unsigned char) ff_vmrglb ((vector signed char) (a1), (vector signed char) (a2))), \
a9a07762 72__ch (__bin_args_eq (vector signed short, (a1), vector signed short, (a2)), \
782b80d9 73 ((vector signed short) ff_vmrglh ((vector signed short) (a1), (vector signed short) (a2))), \
a9a07762 74__ch (__bin_args_eq (vector unsigned short, (a1), vector unsigned short, (a2)), \
782b80d9 75 ((vector unsigned short) ff_vmrglh ((vector signed short) (a1), (vector signed short) (a2))), \
a9a07762 76__ch (__bin_args_eq (vector float, (a1), vector float, (a2)), \
782b80d9 77 ((vector float) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
a9a07762 78__ch (__bin_args_eq (vector signed int, (a1), vector signed int, (a2)), \
782b80d9 79 ((vector signed int) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
a9a07762 80__ch (__bin_args_eq (vector unsigned int, (a1), vector unsigned int, (a2)), \
782b80d9 81 ((vector unsigned int) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
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82 __altivec_link_error_invalid_argument ())))))))
83
84#endif
85
86#endif /* CONFIG_DARWIN */
87
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88#ifndef __MWERKS__
89#define const_vector const vector
90#else
91#define const_vector vector
92#endif
93
a9a07762 94#endif /* _GCC_FIXES_ */