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ffmpeg / libavcodec / ppc / gcc_fixes.h @ 5b21bdab

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/*
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 * gcc fixes for altivec.
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 * Used to workaround broken gcc (FSF gcc-3 pre gcc-3.3)
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 * and to stay somewhat compatible with Darwin.
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef FFMPEG_GCC_FIXES_H
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#define FFMPEG_GCC_FIXES_H
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#ifdef HAVE_ALTIVEC_H
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#include <altivec.h>
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#endif
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#if (__GNUC__ < 4)
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# define REG_v(a)
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#else
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# define REG_v(a) asm ( #a )
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#endif
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#if (__GNUC__ * 100 + __GNUC_MINOR__ < 303)
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/* This code was provided to me by Bartosch Pixa
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 * as a separate header file (broken_mergel.h).
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 * thanks to lu_zero for the workaround.
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 *
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 * See this mail for more information:
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 * http://gcc.gnu.org/ml/gcc/2003-04/msg00967.html
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 */
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static inline vector signed char ff_vmrglb (vector signed char const A,
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                                          vector signed char const B)
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{
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    static const vector unsigned char lowbyte = {
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        0x08, 0x18, 0x09, 0x19, 0x0a, 0x1a, 0x0b,  0x1b,
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        0x0c, 0x1c, 0x0d, 0x1d, 0x0e, 0x1e, 0x0f, 0x1f
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    };
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    return vec_perm (A, B, lowbyte);
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}
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static inline vector signed short ff_vmrglh (vector signed short const A,
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                                          vector signed short const B)
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{
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    static const vector unsigned char lowhalf = {
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        0x08, 0x09, 0x18, 0x19, 0x0a, 0x0b, 0x1a, 0x1b,
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        0x0c, 0x0d, 0x1c, 0x1d, 0x0e, 0x0f, 0x1e, 0x1f
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    };
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    return vec_perm (A, B, lowhalf);
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}
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static inline vector signed int ff_vmrglw (vector signed int const A,
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                                          vector signed int const B)
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{
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    static const vector unsigned char lowword = {
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        0x08, 0x09, 0x0a, 0x0b, 0x18, 0x19, 0x1a, 0x1b,
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        0x0c, 0x0d, 0x0e, 0x0f, 0x1c, 0x1d, 0x1e, 0x1f
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    };
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    return vec_perm (A, B, lowword);
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}
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/*#define ff_vmrglb ff_vmrglb
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#define ff_vmrglh ff_vmrglh
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#define ff_vmrglw ff_vmrglw
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*/
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#undef vec_mergel
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#define vec_mergel(a1, a2) \
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__ch (__bin_args_eq (vector signed char, (a1), vector signed char, (a2)), \
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      ((vector signed char) ff_vmrglb ((vector signed char) (a1), (vector signed char) (a2))), \
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__ch (__bin_args_eq (vector unsigned char, (a1), vector unsigned char, (a2)), \
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      ((vector unsigned char) ff_vmrglb ((vector signed char) (a1), (vector signed char) (a2))), \
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__ch (__bin_args_eq (vector signed short, (a1), vector signed short, (a2)), \
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      ((vector signed short) ff_vmrglh ((vector signed short) (a1), (vector signed short) (a2))), \
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__ch (__bin_args_eq (vector unsigned short, (a1), vector unsigned short, (a2)), \
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      ((vector unsigned short) ff_vmrglh ((vector signed short) (a1), (vector signed short) (a2))), \
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__ch (__bin_args_eq (vector float, (a1), vector float, (a2)), \
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      ((vector float) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
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__ch (__bin_args_eq (vector signed int, (a1), vector signed int, (a2)), \
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      ((vector signed int) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
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__ch (__bin_args_eq (vector unsigned int, (a1), vector unsigned int, (a2)), \
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      ((vector unsigned int) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \
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    __altivec_link_error_invalid_argument ())))))))
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#endif
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#endif /* FFMPEG_GCC_FIXES_H */