PeerStreamer

/*

 * gcc fixes for altivec.

 * Used to workaround broken gcc (FSF gcc-3 pre gcc-3.3)

 * and to stay somewhat compatible with Darwin.

 *

 * This file is part of FFmpeg.

 *

 * FFmpeg is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * FFmpeg is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with FFmpeg; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#ifndef FFMPEG_GCC_FIXES_H

#define FFMPEG_GCC_FIXES_H

#ifdef HAVE_ALTIVEC_H

#include <altivec.h>

#endif

#if (__GNUC__ < 4)

# define REG_v(a)

#else

# define REG_v(a) asm ( #a )

#endif

#if (__GNUC__ * 100 + __GNUC_MINOR__ < 303)

/* This code was provided to me by Bartosch Pixa

 * as a separate header file (broken_mergel.h).

 * thanks to lu_zero for the workaround.

 *

 * See this mail for more information:

 * http://gcc.gnu.org/ml/gcc/2003-04/msg00967.html

 */

static inline vector signed char ff_vmrglb (vector signed char const A,

                                          vector signed char const B)

{

    static const vector unsigned char lowbyte = {

        0x08, 0x18, 0x09, 0x19, 0x0a, 0x1a, 0x0b,  0x1b,

        0x0c, 0x1c, 0x0d, 0x1d, 0x0e, 0x1e, 0x0f, 0x1f

    };

    return vec_perm (A, B, lowbyte);

}

static inline vector signed short ff_vmrglh (vector signed short const A,

                                          vector signed short const B)

{

    static const vector unsigned char lowhalf = {

        0x08, 0x09, 0x18, 0x19, 0x0a, 0x0b, 0x1a, 0x1b,

        0x0c, 0x0d, 0x1c, 0x1d, 0x0e, 0x0f, 0x1e, 0x1f

    };

    return vec_perm (A, B, lowhalf);

}

static inline vector signed int ff_vmrglw (vector signed int const A,

                                          vector signed int const B)

{

    static const vector unsigned char lowword = {

        0x08, 0x09, 0x0a, 0x0b, 0x18, 0x19, 0x1a, 0x1b,

        0x0c, 0x0d, 0x0e, 0x0f, 0x1c, 0x1d, 0x1e, 0x1f

    };

    return vec_perm (A, B, lowword);

}

/*#define ff_vmrglb ff_vmrglb

#define ff_vmrglh ff_vmrglh

#define ff_vmrglw ff_vmrglw

*/

#undef vec_mergel

#define vec_mergel(a1, a2) \

__ch (__bin_args_eq (vector signed char, (a1), vector signed char, (a2)), \

      ((vector signed char) ff_vmrglb ((vector signed char) (a1), (vector signed char) (a2))), \

__ch (__bin_args_eq (vector unsigned char, (a1), vector unsigned char, (a2)), \

      ((vector unsigned char) ff_vmrglb ((vector signed char) (a1), (vector signed char) (a2))), \

__ch (__bin_args_eq (vector signed short, (a1), vector signed short, (a2)), \

      ((vector signed short) ff_vmrglh ((vector signed short) (a1), (vector signed short) (a2))), \

__ch (__bin_args_eq (vector unsigned short, (a1), vector unsigned short, (a2)), \

      ((vector unsigned short) ff_vmrglh ((vector signed short) (a1), (vector signed short) (a2))), \

__ch (__bin_args_eq (vector float, (a1), vector float, (a2)), \

      ((vector float) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \

__ch (__bin_args_eq (vector signed int, (a1), vector signed int, (a2)), \

      ((vector signed int) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \

__ch (__bin_args_eq (vector unsigned int, (a1), vector unsigned int, (a2)), \

      ((vector unsigned int) ff_vmrglw ((vector signed int) (a1), (vector signed int) (a2))), \

    __altivec_link_error_invalid_argument ())))))))

#endif

#endif /* FFMPEG_GCC_FIXES_H */