00001 /* 00002 * Copyright (c) 2012 00003 * MIPS Technologies, Inc., California. 00004 * 00005 * Redistribution and use in source and binary forms, with or without 00006 * modification, are permitted provided that the following conditions 00007 * are met: 00008 * 1. Redistributions of source code must retain the above copyright 00009 * notice, this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its 00014 * contributors may be used to endorse or promote products derived from 00015 * this software without specific prior written permission. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND 00018 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00019 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00020 * ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE 00021 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00022 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00023 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00024 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00025 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00026 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00027 * SUCH DAMAGE. 00028 * 00029 * Author: Nedeljko Babic (nbabic@mips.com) 00030 * 00031 * Math operations optimized for MIPS 00032 * 00033 * This file is part of FFmpeg. 00034 * 00035 * FFmpeg is free software; you can redistribute it and/or 00036 * modify it under the terms of the GNU Lesser General Public 00037 * License as published by the Free Software Foundation; either 00038 * version 2.1 of the License, or (at your option) any later version. 00039 * 00040 * FFmpeg is distributed in the hope that it will be useful, 00041 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00042 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00043 * Lesser General Public License for more details. 00044 * 00045 * You should have received a copy of the GNU Lesser General Public 00046 * License along with FFmpeg; if not, write to the Free Software 00047 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00048 */ 00049 00054 #include "libavcodec/celp_math.h" 00055 00056 static float ff_dot_productf_mips(const float* a, const float* b, 00057 int length) 00058 { 00059 float sum; 00060 const float* a_end = a + length; 00061 00062 __asm__ volatile ( 00063 "mtc1 $zero, %[sum] \n\t" 00064 "blez %[length], ff_dot_productf_end%= \n\t" 00065 "ff_dot_productf_madd%=: \n\t" 00066 "lwc1 $f2, 0(%[a]) \n\t" 00067 "lwc1 $f1, 0(%[b]) \n\t" 00068 "addiu %[a], %[a], 4 \n\t" 00069 "addiu %[b], %[b], 4 \n\t" 00070 "madd.s %[sum], %[sum], $f1, $f2 \n\t" 00071 "bne %[a], %[a_end], ff_dot_productf_madd%= \n\t" 00072 "ff_dot_productf_end%=: \n\t" 00073 00074 : [sum] "=&f" (sum), [a] "+r" (a), [b] "+r" (b) 00075 : [a_end]"r"(a_end), [length] "r" (length) 00076 : "$f1", "$f2" 00077 ); 00078 return sum; 00079 } 00080 00081 void ff_celp_math_init_mips(CELPMContext *c) 00082 { 00083 c->dot_productf = ff_dot_productf_mips; 00084 }
1.5.8