quicktime/ffmpeg/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_ */