COSMETICS: tabs --> spaces, some prettyprinting
[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
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
15 # ifndef __MWERKS__
16 # define AVV(x...) (x)
17 # else
18 # define AVV
19 # endif
20 #else
21 #define AVV(x...) {x}
22 #if (__GNUC__ * 100 + __GNUC_MINOR__ < 303)
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
32 static inline vector signed char ff_vmrglb (vector signed char const A,
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
42 static inline vector signed short ff_vmrglh (vector signed short const A,
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
52 static inline vector signed int ff_vmrglw (vector signed int const A,
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 }
61 /*#define ff_vmrglb ff_vmrglb
62 #define ff_vmrglh ff_vmrglh
63 #define ff_vmrglw ff_vmrglw
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)), \
69 ((vector signed char) ff_vmrglb ((vector signed char) (a1), (vector signed char) (a2))), \
70 __ch (__bin_args_eq (vector unsigned char, (a1), vector unsigned char, (a2)), \
71 ((vector unsigned char) ff_vmrglb ((vector signed char) (a1), (vector signed char) (a2))), \
72 __ch (__bin_args_eq (vector signed short, (a1), vector signed short, (a2)), \
73 ((vector signed short) ff_vmrglh ((vector signed short) (a1), (vector signed short) (a2))), \
74 __ch (__bin_args_eq (vector unsigned short, (a1), vector unsigned short, (a2)), \
75 ((vector unsigned short) ff_vmrglh ((vector signed short) (a1), (vector signed short) (a2))), \
76 __ch (__bin_args_eq (vector float, (a1), vector float, (a2)), \
77 ((vector float) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
78 __ch (__bin_args_eq (vector signed int, (a1), vector signed int, (a2)), \
79 ((vector signed int) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
80 __ch (__bin_args_eq (vector unsigned int, (a1), vector unsigned int, (a2)), \
81 ((vector unsigned int) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
82 __altivec_link_error_invalid_argument ())))))))
83
84 #endif
85
86 #endif /* CONFIG_DARWIN */
87
88 #ifndef __MWERKS__
89 #define const_vector const vector
90 #else
91 #define const_vector vector
92 #endif
93
94 #endif /* _GCC_FIXES_ */