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