00001 /* 00002 * gcc fixes for altivec. 00003 * Used to workaround broken gcc (FSF gcc-3 pre gcc-3.3) 00004 * and to stay somewhat compatible with Darwin. 00005 * 00006 * This file is part of FFmpeg. 00007 * 00008 * FFmpeg is free software; you can redistribute it and/or 00009 * modify it under the terms of the GNU Lesser General Public 00010 * License as published by the Free Software Foundation; either 00011 * version 2.1 of the License, or (at your option) any later version. 00012 * 00013 * FFmpeg is distributed in the hope that it will be useful, 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00016 * Lesser General Public License for more details. 00017 * 00018 * You should have received a copy of the GNU Lesser General Public 00019 * License along with FFmpeg; if not, write to the Free Software 00020 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00021 */ 00022 00023 #ifndef AVCODEC_PPC_GCC_FIXES_H 00024 #define AVCODEC_PPC_GCC_FIXES_H 00025 00026 #include "config.h" 00027 00028 #if HAVE_ALTIVEC_H 00029 #include <altivec.h> 00030 #endif 00031 00032 #if (__GNUC__ < 4) 00033 # define REG_v(a) 00034 #else 00035 # define REG_v(a) __asm__ ( #a ) 00036 #endif 00037 00038 #if (__GNUC__ == 3 && __GNUC_MINOR__ < 3) 00039 00040 /* This code was provided to me by Bartosch Pixa 00041 * as a separate header file (broken_mergel.h). 00042 * thanks to lu_zero for the workaround. 00043 * 00044 * See this mail for more information: 00045 * http://gcc.gnu.org/ml/gcc/2003-04/msg00967.html 00046 */ 00047 00048 static inline vector signed char ff_vmrglb (vector signed char const A, 00049 vector signed char const B) 00050 { 00051 static const vector unsigned char lowbyte = { 00052 0x08, 0x18, 0x09, 0x19, 0x0a, 0x1a, 0x0b, 0x1b, 00053 0x0c, 0x1c, 0x0d, 0x1d, 0x0e, 0x1e, 0x0f, 0x1f 00054 }; 00055 return vec_perm (A, B, lowbyte); 00056 } 00057 00058 static inline vector signed short ff_vmrglh (vector signed short const A, 00059 vector signed short const B) 00060 { 00061 static const vector unsigned char lowhalf = { 00062 0x08, 0x09, 0x18, 0x19, 0x0a, 0x0b, 0x1a, 0x1b, 00063 0x0c, 0x0d, 0x1c, 0x1d, 0x0e, 0x0f, 0x1e, 0x1f 00064 }; 00065 return vec_perm (A, B, lowhalf); 00066 } 00067 00068 static inline vector signed int ff_vmrglw (vector signed int const A, 00069 vector signed int const B) 00070 { 00071 static const vector unsigned char lowword = { 00072 0x08, 0x09, 0x0a, 0x0b, 0x18, 0x19, 0x1a, 0x1b, 00073 0x0c, 0x0d, 0x0e, 0x0f, 0x1c, 0x1d, 0x1e, 0x1f 00074 }; 00075 return vec_perm (A, B, lowword); 00076 } 00077 /*#define ff_vmrglb ff_vmrglb 00078 #define ff_vmrglh ff_vmrglh 00079 #define ff_vmrglw ff_vmrglw 00080 */ 00081 #undef vec_mergel 00082 00083 #define vec_mergel(a1, a2) \ 00084 __ch (__bin_args_eq (vector signed char, (a1), vector signed char, (a2)), \ 00085 ((vector signed char) ff_vmrglb ((vector signed char) (a1), (vector signed char) (a2))), \ 00086 __ch (__bin_args_eq (vector unsigned char, (a1), vector unsigned char, (a2)), \ 00087 ((vector unsigned char) ff_vmrglb ((vector signed char) (a1), (vector signed char) (a2))), \ 00088 __ch (__bin_args_eq (vector signed short, (a1), vector signed short, (a2)), \ 00089 ((vector signed short) ff_vmrglh ((vector signed short) (a1), (vector signed short) (a2))), \ 00090 __ch (__bin_args_eq (vector unsigned short, (a1), vector unsigned short, (a2)), \ 00091 ((vector unsigned short) ff_vmrglh ((vector signed short) (a1), (vector signed short) (a2))), \ 00092 __ch (__bin_args_eq (vector float, (a1), vector float, (a2)), \ 00093 ((vector float) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \ 00094 __ch (__bin_args_eq (vector signed int, (a1), vector signed int, (a2)), \ 00095 ((vector signed int) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \ 00096 __ch (__bin_args_eq (vector unsigned int, (a1), vector unsigned int, (a2)), \ 00097 ((vector unsigned int) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \ 00098 __altivec_link_error_invalid_argument ()))))))) 00099 00100 #endif /* (__GNUC__ == 3 && __GNUC_MINOR__ < 3) */ 00101 00102 #endif /* AVCODEC_PPC_GCC_FIXES_H */