| /* |
| * 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 (nbabic@mips.com) |
| * |
| * 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 |
| */ |
| #include "config.h" |
| #include "libavcodec/celp_math.h" |
| #include "libavutil/mips/asmdefs.h" |
| |
| #if HAVE_INLINE_ASM |
| #if !HAVE_MIPS32R6 && !HAVE_MIPS64R6 |
| 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; |
| } |
| #endif /* !HAVE_MIPS32R6 && !HAVE_MIPS64R6 */ |
| #endif /* HAVE_INLINE_ASM */ |
| |
| void ff_celp_math_init_mips(CELPMContext *c) |
| { |
| #if HAVE_INLINE_ASM |
| #if !HAVE_MIPS32R6 && !HAVE_MIPS64R6 |
| c->dot_productf = ff_dot_productf_mips; |
| #endif |
| #endif |
| } |