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 AVCODEC_PPC_GCC_FIXES_H 24#define AVCODEC_PPC_GCC_FIXES_H 25 26#include "config.h" 27 28#if HAVE_ALTIVEC_H 29#include <altivec.h> 30#endif 31 32#if (__GNUC__ < 4) 33# define REG_v(a) 34#else 35# define REG_v(a) __asm__ ( #a ) 36#endif 37 38#if (__GNUC__ == 3 && __GNUC_MINOR__ < 3) 39 40/* This code was provided to me by Bartosch Pixa 41 * as a separate header file (broken_mergel.h). 42 * thanks to lu_zero for the workaround. 43 * 44 * See this mail for more information: 45 * http://gcc.gnu.org/ml/gcc/2003-04/msg00967.html 46 */ 47 48static inline vector signed char ff_vmrglb (vector signed char const A, 49 vector signed char const B) 50{ 51 static const vector unsigned char lowbyte = { 52 0x08, 0x18, 0x09, 0x19, 0x0a, 0x1a, 0x0b, 0x1b, 53 0x0c, 0x1c, 0x0d, 0x1d, 0x0e, 0x1e, 0x0f, 0x1f 54 }; 55 return vec_perm (A, B, lowbyte); 56} 57 58static inline vector signed short ff_vmrglh (vector signed short const A, 59 vector signed short const B) 60{ 61 static const vector unsigned char lowhalf = { 62 0x08, 0x09, 0x18, 0x19, 0x0a, 0x0b, 0x1a, 0x1b, 63 0x0c, 0x0d, 0x1c, 0x1d, 0x0e, 0x0f, 0x1e, 0x1f 64 }; 65 return vec_perm (A, B, lowhalf); 66} 67 68static inline vector signed int ff_vmrglw (vector signed int const A, 69 vector signed int const B) 70{ 71 static const vector unsigned char lowword = { 72 0x08, 0x09, 0x0a, 0x0b, 0x18, 0x19, 0x1a, 0x1b, 73 0x0c, 0x0d, 0x0e, 0x0f, 0x1c, 0x1d, 0x1e, 0x1f 74 }; 75 return vec_perm (A, B, lowword); 76} 77/*#define ff_vmrglb ff_vmrglb 78#define ff_vmrglh ff_vmrglh 79#define ff_vmrglw ff_vmrglw 80*/ 81#undef vec_mergel 82 83#define vec_mergel(a1, a2) \ 84__ch (__bin_args_eq (vector signed char, (a1), vector signed char, (a2)), \ 85 ((vector signed char) ff_vmrglb ((vector signed char) (a1), (vector signed char) (a2))), \ 86__ch (__bin_args_eq (vector unsigned char, (a1), vector unsigned char, (a2)), \ 87 ((vector unsigned char) ff_vmrglb ((vector signed char) (a1), (vector signed char) (a2))), \ 88__ch (__bin_args_eq (vector signed short, (a1), vector signed short, (a2)), \ 89 ((vector signed short) ff_vmrglh ((vector signed short) (a1), (vector signed short) (a2))), \ 90__ch (__bin_args_eq (vector unsigned short, (a1), vector unsigned short, (a2)), \ 91 ((vector unsigned short) ff_vmrglh ((vector signed short) (a1), (vector signed short) (a2))), \ 92__ch (__bin_args_eq (vector float, (a1), vector float, (a2)), \ 93 ((vector float) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \ 94__ch (__bin_args_eq (vector signed int, (a1), vector signed int, (a2)), \ 95 ((vector signed int) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \ 96__ch (__bin_args_eq (vector unsigned int, (a1), vector unsigned int, (a2)), \ 97 ((vector unsigned int) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \ 98 __altivec_link_error_invalid_argument ()))))))) 99 100#endif /* (__GNUC__ == 3 && __GNUC_MINOR__ < 3) */ 101 102#endif /* AVCODEC_PPC_GCC_FIXES_H */ 103