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https://github.com/FFmpeg/FFmpeg.git
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183 lines
10 KiB
C
183 lines
10 KiB
C
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/*
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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: Bojan Zivkovic (bojan@mips.com)
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*
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* Compute antialias function optimised for MIPS floating-point architecture
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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/mpegaudiodec.c
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*/
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#ifndef AVCODEC_MIPS_COMPUTE_ANTIALIAS_FLOAT_H
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#define AVCODEC_MIPS_COMPUTE_ANTIALIAS_FLOAT_H
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static void compute_antialias_mips_float(MPADecodeContext *s,
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GranuleDef *g)
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{
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float *ptr, *ptr_end;
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float *csa = &csa_table[0][0];
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int n;
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/* temporary variables */
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float in1, in2, in3, in4, in5, in6, in7, in8;
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float out1, out2, out3, out4;
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ptr = g->sb_hybrid + 18;
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/* we antialias only "long" bands */
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if (g->block_type == 2) {
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if (!g->switch_point)
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return;
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/* XXX: check this for 8000Hz case */
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n = 1;
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ptr_end = ptr + 18;
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} else {
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n = 31;
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ptr_end = ptr + 558;
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}
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/**
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* instructions are scheduled to minimize pipeline stall.
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*/
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__asm__ __volatile__ (
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"compute_antialias_float_loop%=: \t\n"
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"lwc1 %[in1], -1*4(%[ptr]) \t\n"
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"lwc1 %[in2], 0(%[csa]) \t\n"
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"lwc1 %[in3], 1*4(%[csa]) \t\n"
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"lwc1 %[in4], 0(%[ptr]) \t\n"
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"lwc1 %[in5], -2*4(%[ptr]) \t\n"
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"lwc1 %[in6], 4*4(%[csa]) \t\n"
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"mul.s %[out1], %[in1], %[in2] \t\n"
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"mul.s %[out2], %[in1], %[in3] \t\n"
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"lwc1 %[in7], 5*4(%[csa]) \t\n"
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"lwc1 %[in8], 1*4(%[ptr]) \t\n"
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"nmsub.s %[out1], %[out1], %[in3], %[in4] \t\n"
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"madd.s %[out2], %[out2], %[in2], %[in4] \t\n"
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"mul.s %[out3], %[in5], %[in6] \t\n"
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"mul.s %[out4], %[in5], %[in7] \t\n"
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"lwc1 %[in1], -3*4(%[ptr]) \t\n"
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"swc1 %[out1], -1*4(%[ptr]) \t\n"
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"swc1 %[out2], 0(%[ptr]) \t\n"
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"nmsub.s %[out3], %[out3], %[in7], %[in8] \t\n"
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"madd.s %[out4], %[out4], %[in6], %[in8] \t\n"
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"lwc1 %[in2], 8*4(%[csa]) \t\n"
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"swc1 %[out3], -2*4(%[ptr]) \t\n"
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"swc1 %[out4], 1*4(%[ptr]) \t\n"
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"lwc1 %[in3], 9*4(%[csa]) \t\n"
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"lwc1 %[in4], 2*4(%[ptr]) \t\n"
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"mul.s %[out1], %[in1], %[in2] \t\n"
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"lwc1 %[in5], -4*4(%[ptr]) \t\n"
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"lwc1 %[in6], 12*4(%[csa]) \t\n"
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"mul.s %[out2], %[in1], %[in3] \t\n"
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"lwc1 %[in7], 13*4(%[csa]) \t\n"
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"nmsub.s %[out1], %[out1], %[in3], %[in4] \t\n"
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"lwc1 %[in8], 3*4(%[ptr]) \t\n"
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"mul.s %[out3], %[in5], %[in6] \t\n"
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"madd.s %[out2], %[out2], %[in2], %[in4] \t\n"
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"mul.s %[out4], %[in5], %[in7] \t\n"
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"swc1 %[out1], -3*4(%[ptr]) \t\n"
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"lwc1 %[in1], -5*4(%[ptr]) \t\n"
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"nmsub.s %[out3], %[out3], %[in7], %[in8] \t\n"
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"swc1 %[out2], 2*4(%[ptr]) \t\n"
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"madd.s %[out4], %[out4], %[in6], %[in8] \t\n"
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"lwc1 %[in2], 16*4(%[csa]) \t\n"
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"lwc1 %[in3], 17*4(%[csa]) \t\n"
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"swc1 %[out3], -4*4(%[ptr]) \t\n"
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"lwc1 %[in4], 4*4(%[ptr]) \t\n"
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"swc1 %[out4], 3*4(%[ptr]) \t\n"
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"mul.s %[out1], %[in1], %[in2] \t\n"
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"mul.s %[out2], %[in1], %[in3] \t\n"
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"lwc1 %[in5], -6*4(%[ptr]) \t\n"
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"lwc1 %[in6], 20*4(%[csa]) \t\n"
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"lwc1 %[in7], 21*4(%[csa]) \t\n"
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"nmsub.s %[out1], %[out1], %[in3], %[in4] \t\n"
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"madd.s %[out2], %[out2], %[in2], %[in4] \t\n"
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"lwc1 %[in8], 5*4(%[ptr]) \t\n"
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"mul.s %[out3], %[in5], %[in6] \t\n"
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"mul.s %[out4], %[in5], %[in7] \t\n"
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"swc1 %[out1], -5*4(%[ptr]) \t\n"
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"swc1 %[out2], 4*4(%[ptr]) \t\n"
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"lwc1 %[in1], -7*4(%[ptr]) \t\n"
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"nmsub.s %[out3], %[out3], %[in7], %[in8] \t\n"
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"madd.s %[out4], %[out4], %[in6], %[in8] \t\n"
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"lwc1 %[in2], 24*4(%[csa]) \t\n"
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"lwc1 %[in3], 25*4(%[csa]) \t\n"
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"lwc1 %[in4], 6*4(%[ptr]) \t\n"
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"swc1 %[out3], -6*4(%[ptr]) \t\n"
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"swc1 %[out4], 5*4(%[ptr]) \t\n"
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"mul.s %[out1], %[in1], %[in2] \t\n"
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"lwc1 %[in5], -8*4(%[ptr]) \t\n"
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"mul.s %[out2], %[in1], %[in3] \t\n"
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"lwc1 %[in6], 28*4(%[csa]) \t\n"
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"lwc1 %[in7], 29*4(%[csa]) \t\n"
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"nmsub.s %[out1], %[out1], %[in3], %[in4] \t\n"
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"lwc1 %[in8], 7*4(%[ptr]) \t\n"
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"madd.s %[out2], %[out2], %[in2], %[in4] \t\n"
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"mul.s %[out3], %[in5], %[in6] \t\n"
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"mul.s %[out4], %[in5], %[in7] \t\n"
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"swc1 %[out1], -7*4(%[ptr]) \t\n"
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"swc1 %[out2], 6*4(%[ptr]) \t\n"
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"addiu %[ptr], %[ptr], 72 \t\n"
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"nmsub.s %[out3], %[out3], %[in7], %[in8] \t\n"
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"madd.s %[out4], %[out4], %[in6], %[in8] \t\n"
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"swc1 %[out3], -26*4(%[ptr]) \t\n"
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"swc1 %[out4], -11*4(%[ptr]) \t\n"
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"bne %[ptr], %[ptr_end], compute_antialias_float_loop%= \t\n"
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: [ptr] "+r" (ptr),
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[in1] "=&f" (in1), [in2] "=&f" (in2),
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[in3] "=&f" (in3), [in4] "=&f" (in4),
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[in5] "=&f" (in5), [in6] "=&f" (in6),
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[in7] "=&f" (in7), [in8] "=&f" (in8),
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[out1] "=&f" (out1), [out2] "=&f" (out2),
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[out3] "=&f" (out3), [out4] "=&f" (out4)
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: [csa] "r" (csa), [ptr_end] "r" (ptr_end)
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);
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}
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#define compute_antialias compute_antialias_mips_float
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#endif /* AVCODEC_MIPS_COMPUTE_ANTIALIAS_FLOAT_H */
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