yading@10: /*
yading@10:  * Copyright (c) 2012
yading@10:  *      MIPS Technologies, Inc., California.
yading@10:  *
yading@10:  * Redistribution and use in source and binary forms, with or without
yading@10:  * modification, are permitted provided that the following conditions
yading@10:  * are met:
yading@10:  * 1. Redistributions of source code must retain the above copyright
yading@10:  *    notice, this list of conditions and the following disclaimer.
yading@10:  * 2. Redistributions in binary form must reproduce the above copyright
yading@10:  *    notice, this list of conditions and the following disclaimer in the
yading@10:  *    documentation and/or other materials provided with the distribution.
yading@10:  * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
yading@10:  *    contributors may be used to endorse or promote products derived from
yading@10:  *    this software without specific prior written permission.
yading@10:  *
yading@10:  * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
yading@10:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
yading@10:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
yading@10:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
yading@10:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
yading@10:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
yading@10:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
yading@10:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
yading@10:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
yading@10:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
yading@10:  * SUCH DAMAGE.
yading@10:  *
yading@10:  * Author:  Nedeljko Babic (nbabic@mips.com)
yading@10:  *
yading@10:  * Math operations optimized for MIPS
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * Reference: libavcodec/celp_math.c
yading@10:  */
yading@10: #include "config.h"
yading@10: #include "libavcodec/celp_math.h"
yading@10: 
yading@10: #if HAVE_INLINE_ASM
yading@10: static float ff_dot_productf_mips(const float* a, const float* b,
yading@10:                                               int length)
yading@10: {
yading@10:     float sum;
yading@10:     const float* a_end = a + length;
yading@10: 
yading@10:     __asm__ volatile (
yading@10:         "mtc1   $zero,      %[sum]                              \n\t"
yading@10:         "blez   %[length],  ff_dot_productf_end%=               \n\t"
yading@10:         "ff_dot_productf_madd%=:                                \n\t"
yading@10:         "lwc1   $f2,        0(%[a])                             \n\t"
yading@10:         "lwc1   $f1,        0(%[b])                             \n\t"
yading@10:         "addiu  %[a],       %[a],      4                        \n\t"
yading@10:         "addiu  %[b],       %[b],      4                        \n\t"
yading@10:         "madd.s %[sum],     %[sum],    $f1, $f2                 \n\t"
yading@10:         "bne   %[a],        %[a_end],  ff_dot_productf_madd%=   \n\t"
yading@10:         "ff_dot_productf_end%=:                                 \n\t"
yading@10: 
yading@10:         : [sum] "=&f" (sum), [a] "+r" (a), [b] "+r" (b)
yading@10:         : [a_end]"r"(a_end), [length] "r" (length)
yading@10:         : "$f1", "$f2", "memory"
yading@10:     );
yading@10:     return sum;
yading@10: }
yading@10: #endif /* HAVE_INLINE_ASM */
yading@10: 
yading@10: void ff_celp_math_init_mips(CELPMContext *c)
yading@10: {
yading@10: #if HAVE_INLINE_ASM
yading@10:     c->dot_productf = ff_dot_productf_mips;
yading@10: #endif
yading@10: }