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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]) | |
| * | |
| * 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/amrwbdec.c | |
| */ | |
| void ff_hb_fir_filter_mips(float *out, const float fir_coef[HB_FIR_SIZE + 1], | |
| float mem[HB_FIR_SIZE], const float *in) | |
| { | |
| int i; | |
| float data[AMRWB_SFR_SIZE_16k + HB_FIR_SIZE]; // past and current samples | |
| memcpy(data, mem, HB_FIR_SIZE * sizeof(float)); | |
| memcpy(data + HB_FIR_SIZE, in, AMRWB_SFR_SIZE_16k * sizeof(float)); | |
| for (i = 0; i < AMRWB_SFR_SIZE_16k; i++) { | |
| float output; | |
| float * p_data = (data+i); | |
| /** | |
| * inner loop is entirely unrolled and instructions are scheduled | |
| * to minimize pipeline stall | |
| */ | |
| __asm__ volatile( | |
| "mtc1 $zero, %[output] \n\t" | |
| "lwc1 $f0, 0(%[p_data]) \n\t" | |
| "lwc1 $f1, 0(%[fir_coef]) \n\t" | |
| "lwc1 $f2, 4(%[p_data]) \n\t" | |
| "madd.s %[output], %[output], $f0, $f1 \n\t" | |
| "lwc1 $f3, 4(%[fir_coef]) \n\t" | |
| "lwc1 $f4, 8(%[p_data]) \n\t" | |
| "madd.s %[output], %[output], $f2, $f3 \n\t" | |
| "lwc1 $f5, 8(%[fir_coef]) \n\t" | |
| "lwc1 $f0, 12(%[p_data]) \n\t" | |
| "lwc1 $f1, 12(%[fir_coef]) \n\t" | |
| "madd.s %[output], %[output], $f4, $f5 \n\t" | |
| "lwc1 $f2, 16(%[p_data]) \n\t" | |
| "madd.s %[output], %[output], $f0, $f1 \n\t" | |
| "lwc1 $f3, 16(%[fir_coef]) \n\t" | |
| "lwc1 $f4, 20(%[p_data]) \n\t" | |
| "lwc1 $f5, 20(%[fir_coef]) \n\t" | |
| "madd.s %[output], %[output], $f2, $f3 \n\t" | |
| "lwc1 $f0, 24(%[p_data]) \n\t" | |
| "lwc1 $f1, 24(%[fir_coef]) \n\t" | |
| "lwc1 $f2, 28(%[p_data]) \n\t" | |
| "madd.s %[output], %[output], $f4, $f5 \n\t" | |
| "lwc1 $f3, 28(%[fir_coef]) \n\t" | |
| "madd.s %[output], %[output], $f0, $f1 \n\t" | |
| "lwc1 $f4, 32(%[p_data]) \n\t" | |
| "madd.s %[output], %[output], $f2, $f3 \n\t" | |
| "lwc1 $f5, 32(%[fir_coef]) \n\t" | |
| "madd.s %[output], %[output], $f4, $f5 \n\t" | |
| "lwc1 $f0, 36(%[p_data]) \n\t" | |
| "lwc1 $f1, 36(%[fir_coef]) \n\t" | |
| "lwc1 $f2, 40(%[p_data]) \n\t" | |
| "lwc1 $f3, 40(%[fir_coef]) \n\t" | |
| "madd.s %[output], %[output], $f0, $f1 \n\t" | |
| "lwc1 $f4, 44(%[p_data]) \n\t" | |
| "lwc1 $f5, 44(%[fir_coef]) \n\t" | |
| "madd.s %[output], %[output], $f2, $f3 \n\t" | |
| "lwc1 $f0, 48(%[p_data]) \n\t" | |
| "lwc1 $f1, 48(%[fir_coef]) \n\t" | |
| "lwc1 $f2, 52(%[p_data]) \n\t" | |
| "madd.s %[output], %[output], $f4, $f5 \n\t" | |
| "lwc1 $f3, 52(%[fir_coef]) \n\t" | |
| "lwc1 $f4, 56(%[p_data]) \n\t" | |
| "madd.s %[output], %[output], $f0, $f1 \n\t" | |
| "lwc1 $f5, 56(%[fir_coef]) \n\t" | |
| "madd.s %[output], %[output], $f2, $f3 \n\t" | |
| "lwc1 $f0, 60(%[p_data]) \n\t" | |
| "lwc1 $f1, 60(%[fir_coef]) \n\t" | |
| "lwc1 $f2, 64(%[p_data]) \n\t" | |
| "madd.s %[output], %[output], $f4, $f5 \n\t" | |
| "lwc1 $f3, 64(%[fir_coef]) \n\t" | |
| "madd.s %[output], %[output], $f0, $f1 \n\t" | |
| "lwc1 $f4, 68(%[p_data]) \n\t" | |
| "madd.s %[output], %[output], $f2, $f3 \n\t" | |
| "lwc1 $f5, 68(%[fir_coef]) \n\t" | |
| "madd.s %[output], %[output], $f4, $f5 \n\t" | |
| "lwc1 $f0, 72(%[p_data]) \n\t" | |
| "lwc1 $f1, 72(%[fir_coef]) \n\t" | |
| "lwc1 $f2, 76(%[p_data]) \n\t" | |
| "lwc1 $f3, 76(%[fir_coef]) \n\t" | |
| "madd.s %[output], %[output], $f0, $f1 \n\t" | |
| "lwc1 $f4, 80(%[p_data]) \n\t" | |
| "lwc1 $f5, 80(%[fir_coef]) \n\t" | |
| "madd.s %[output], %[output], $f2, $f3 \n\t" | |
| "lwc1 $f0, 84(%[p_data]) \n\t" | |
| "lwc1 $f1, 84(%[fir_coef]) \n\t" | |
| "lwc1 $f2, 88(%[p_data]) \n\t" | |
| "madd.s %[output], %[output], $f4, $f5 \n\t" | |
| "lwc1 $f3, 88(%[fir_coef]) \n\t" | |
| "lwc1 $f4, 92(%[p_data]) \n\t" | |
| "madd.s %[output], %[output], $f0, $f1 \n\t" | |
| "lwc1 $f5, 92(%[fir_coef]) \n\t" | |
| "madd.s %[output], %[output], $f2, $f3 \n\t" | |
| "lwc1 $f0, 96(%[p_data]) \n\t" | |
| "lwc1 $f1, 96(%[fir_coef]) \n\t" | |
| "lwc1 $f2, 100(%[p_data]) \n\t" | |
| "madd.s %[output], %[output], $f4, $f5 \n\t" | |
| "lwc1 $f3, 100(%[fir_coef]) \n\t" | |
| "lwc1 $f4, 104(%[p_data]) \n\t" | |
| "madd.s %[output], %[output], $f0, $f1 \n\t" | |
| "lwc1 $f5, 104(%[fir_coef]) \n\t" | |
| "madd.s %[output], %[output], $f2, $f3 \n\t" | |
| "lwc1 $f0, 108(%[p_data]) \n\t" | |
| "lwc1 $f1, 108(%[fir_coef]) \n\t" | |
| "madd.s %[output], %[output], $f4, $f5 \n\t" | |
| "lwc1 $f2, 112(%[p_data]) \n\t" | |
| "lwc1 $f3, 112(%[fir_coef]) \n\t" | |
| "madd.s %[output], %[output], $f0, $f1 \n\t" | |
| "lwc1 $f4, 116(%[p_data]) \n\t" | |
| "lwc1 $f5, 116(%[fir_coef]) \n\t" | |
| "lwc1 $f0, 120(%[p_data]) \n\t" | |
| "madd.s %[output], %[output], $f2, $f3 \n\t" | |
| "lwc1 $f1, 120(%[fir_coef]) \n\t" | |
| "madd.s %[output], %[output], $f4, $f5 \n\t" | |
| "madd.s %[output], %[output], $f0, $f1 \n\t" | |
| : [output]"=&f"(output) | |
| : [fir_coef]"r"(fir_coef), [p_data]"r"(p_data) | |
| : "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "memory" | |
| ); | |
| out[i] = output; | |
| } | |
| memcpy(mem, data + AMRWB_SFR_SIZE_16k, HB_FIR_SIZE * sizeof(float)); | |
| } | |