mirror of https://git.ffmpeg.org/ffmpeg.git
90 lines
3.7 KiB
C
90 lines
3.7 KiB
C
/*
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* Copyright (c) 2012
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* MIPS Technologies, Inc., California.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Author: Nedeljko Babic (nbabic@mips.com)
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*
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* Math operations optimized for MIPS
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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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/**
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* @file
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* Reference: libavcodec/celp_math.c
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*/
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#include "config.h"
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#include "libavcodec/celp_math.h"
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#if HAVE_INLINE_ASM
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static float ff_dot_productf_mips(const float* a, const float* b,
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int length)
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{
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float sum;
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const float* a_end = a + length;
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__asm__ volatile (
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"mtc1 $zero, %[sum] \n\t"
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"blez %[length], ff_dot_productf_end%= \n\t"
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"ff_dot_productf_madd%=: \n\t"
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"lwc1 $f2, 0(%[a]) \n\t"
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"lwc1 $f1, 0(%[b]) \n\t"
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"addiu %[a], %[a], 4 \n\t"
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"addiu %[b], %[b], 4 \n\t"
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"madd.s %[sum], %[sum], $f1, $f2 \n\t"
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"bne %[a], %[a_end], ff_dot_productf_madd%= \n\t"
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"ff_dot_productf_end%=: \n\t"
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: [sum] "=&f" (sum), [a] "+r" (a), [b] "+r" (b)
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: [a_end]"r"(a_end), [length] "r" (length)
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: "$f1", "$f2"
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);
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return sum;
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}
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#endif /* HAVE_INLINE_ASM */
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void ff_celp_math_init_mips(CELPMContext *c)
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{
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#if HAVE_INLINE_ASM
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c->dot_productf = ff_dot_productf_mips;
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#endif
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}
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