/*
* 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)
*
* various filters for CELP-based codecs 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_filters.c
*/
#include "config.h"
#include "libavutil/attributes.h"
#include "libavutil/common.h"
#include "libavcodec/celp_filters.h"
#if HAVE_INLINE_ASM
static void ff_celp_lp_synthesis_filterf_mips(float *out,
const float *filter_coeffs,
const float* in, int buffer_length,
int filter_length)
{
int i,n;
float out0, out1, out2, out3;
float old_out0, old_out1, old_out2, old_out3;
float a,b,c;
const float *p_filter_coeffs;
float *p_out;
a = filter_coeffs[0];
b = filter_coeffs[1];
c = filter_coeffs[2];
b -= filter_coeffs[0] * filter_coeffs[0];
c -= filter_coeffs[1] * filter_coeffs[0];
c -= filter_coeffs[0] * b;
old_out0 = out[-4];
old_out1 = out[-3];
old_out2 = out[-2];
old_out3 = out[-1];
for (n = 0; n <= buffer_length - 4; n+=4) {
p_filter_coeffs = filter_coeffs;
p_out = out;
out0 = in[0];
out1 = in[1];
out2 = in[2];
out3 = in[3];
__asm__ volatile(
"lwc1 $f2, 8(%[filter_coeffs]) \n\t"
"lwc1 $f1, 4(%[filter_coeffs]) \n\t"
"lwc1 $f0, 0(%[filter_coeffs]) \n\t"
"nmsub.s %[out0], %[out0], $f2, %[old_out1] \n\t"
"nmsub.s %[out1], %[out1], $f2, %[old_out2] \n\t"
"nmsub.s %[out2], %[out2], $f2, %[old_out3] \n\t"
"lwc1 $f3, 12(%[filter_coeffs]) \n\t"
"nmsub.s %[out0], %[out0], $f1, %[old_out2] \n\t"
"nmsub.s %[out1], %[out1], $f1, %[old_out3] \n\t"
"nmsub.s %[out2], %[out2], $f3, %[old_out2] \n\t"
"nmsub.s %[out0], %[out0], $f0, %[old_out3] \n\t"
"nmsub.s %[out3], %[out3], $f3, %[old_out3] \n\t"
"nmsub.s %[out1], %[out1], $f3, %[old_out1] \n\t"
"nmsub.s %[out0], %[out0], $f3, %[old_out0] \n\t"
: [out0]"+f"(out0), [out1]"+f"(out1),
[out2]"+f"(out2), [out3]"+f"(out3)
: [old_out0]"f"(old_out0), [old_out1]"f"(old_out1),
[old_out2]"f"(old_out2), [old_out3]"f"(old_out3),
[filter_coeffs]"r"(filter_coeffs)
: "$f0", "$f1", "$f2", "$f3", "$f4", "memory"
);
for (i = 5; i <= filter_length; i += 2) {
__asm__ volatile(
"lwc1 %[old_out3], -20(%[p_out]) \n\t"
"lwc1 $f5, 16(%[p_filter_coeffs]) \n\t"
"addiu %[p_out], -8 \n\t"
"addiu %[p_filter_coeffs], 8 \n\t"
"nmsub.s %[out1], %[out1], $f5, %[old_out0] \n\t"
"nmsub.s %[out3], %[out3], $f5, %[old_out2] \n\t"
"lwc1 $f4, 12(%[p_filter_coeffs]) \n\t"
"lwc1 %[old_out2], -16(%[p_out]) \n\t"
"nmsub.s %[out0], %[out0], $f5, %[old_out3] \n\t"
"nmsub.s %[out2], %[out2], $f5, %[old_out1] \n\t"
"nmsub.s %[out1], %[out1], $f4, %[old_out3] \n\t"
"nmsub.s %[out3], %[out3], $f4, %[old_out1] \n\t"
"mov.s %[old_out1], %[old_out3] \n\t"
"nmsub.s %[out0], %[out0], $f4, %[old_out2] \n\t"
"nmsub.s %[out2], %[out2], $f4, %[old_out0] \n\t"
: [out0]"+f"(out0), [out1]"+f"(out1),
[out2]"+f"(out2), [out3]"+f"(out3), [old_out0]"+f"(old_out0),
[old_out1]"+f"(old_out1), [old_out2]"+f"(old_out2),
[old_out3]"+f"(old_out3),[p_filter_coeffs]"+r"(p_filter_coeffs),
[p_out]"+r"(p_out)
:
: "$f4", "$f5", "memory"
);
FFSWAP(float, old_out0, old_out2);
}
__asm__ volatile(
"nmsub.s %[out3], %[out3], %[a], %[out2] \n\t"
"nmsub.s %[out2], %[out2], %[a], %[out1] \n\t"
"nmsub.s %[out3], %[out3], %[b], %[out1] \n\t"
"nmsub.s %[out1], %[out1], %[a], %[out0] \n\t"
"nmsub.s %[out2], %[out2], %[b], %[out0] \n\t"
"nmsub.s %[out3], %[out3], %[c], %[out0] \n\t"
: [out0]"+f"(out0), [out1]"+f"(out1),
[out2]"+f"(out2), [out3]"+f"(out3)
: [a]"f"(a), [b]"f"(b), [c]"f"(c)
);
out[0] = out0;
out[1] = out1;
out[2] = out2;
out[3] = out3;
old_out0 = out0;
old_out1 = out1;
old_out2 = out2;
old_out3 = out3;
out += 4;
in += 4;
}
out -= n;
in -= n;
for (; n < buffer_length; n++) {
float out_val, out_val_i, fc_val;
p_filter_coeffs = filter_coeffs;
p_out = &out[n];
out_val = in[n];
for (i = 1; i <= filter_length; i++) {
__asm__ volatile(
"lwc1 %[fc_val], 0(%[p_filter_coeffs]) \n\t"
"lwc1 %[out_val_i], -4(%[p_out]) \n\t"
"addiu %[p_filter_coeffs], 4 \n\t"
"addiu %[p_out], -4 \n\t"
"nmsub.s %[out_val], %[out_val], %[fc_val], %[out_val_i] \n\t"
: [fc_val]"=&f"(fc_val), [out_val]"+f"(out_val),
[out_val_i]"=&f"(out_val_i), [p_out]"+r"(p_out),
[p_filter_coeffs]"+r"(p_filter_coeffs)
:
: "memory"
);
}
out[n] = out_val;
}
}
static void ff_celp_lp_zero_synthesis_filterf_mips(float *out,
const float *filter_coeffs,
const float *in, int buffer_length,
int filter_length)
{
int i,n;
float sum_out8, sum_out7, sum_out6, sum_out5, sum_out4, fc_val;
float sum_out3, sum_out2, sum_out1;
const float *p_filter_coeffs, *p_in;
for (n = 0; n < buffer_length; n+=8) {
p_in = &in[n];
p_filter_coeffs = filter_coeffs;
sum_out8 = in[n+7];
sum_out7 = in[n+6];
sum_out6 = in[n+5];
sum_out5 = in[n+4];
sum_out4 = in[n+3];
sum_out3 = in[n+2];
sum_out2 = in[n+1];
sum_out1 = in[n];
i = filter_length;
/* i is always greater than 0
* outer loop is unrolled eight times so there is less memory access
* inner loop is unrolled two times
*/
__asm__ volatile(
"filt_lp_inner%=: \n\t"
"lwc1 %[fc_val], 0(%[p_filter_coeffs]) \n\t"
"lwc1 $f7, 6*4(%[p_in]) \n\t"
"lwc1 $f6, 5*4(%[p_in]) \n\t"
"lwc1 $f5, 4*4(%[p_in]) \n\t"
"lwc1 $f4, 3*4(%[p_in]) \n\t"
"lwc1 $f3, 2*4(%[p_in]) \n\t"
"lwc1 $f2, 4(%[p_in]) \n\t"
"lwc1 $f1, 0(%[p_in]) \n\t"
"lwc1 $f0, -4(%[p_in]) \n\t"
"addiu %[i], -2 \n\t"
"madd.s %[sum_out8], %[sum_out8], %[fc_val], $f7 \n\t"
"madd.s %[sum_out7], %[sum_out7], %[fc_val], $f6 \n\t"
"madd.s %[sum_out6], %[sum_out6], %[fc_val], $f5 \n\t"
"madd.s %[sum_out5], %[sum_out5], %[fc_val], $f4 \n\t"
"madd.s %[sum_out4], %[sum_out4], %[fc_val], $f3 \n\t"
"madd.s %[sum_out3], %[sum_out3], %[fc_val], $f2 \n\t"
"madd.s %[sum_out2], %[sum_out2], %[fc_val], $f1 \n\t"
"madd.s %[sum_out1], %[sum_out1], %[fc_val], $f0 \n\t"
"lwc1 %[fc_val], 4(%[p_filter_coeffs]) \n\t"
"lwc1 $f7, -8(%[p_in]) \n\t"
"addiu %[p_filter_coeffs], 8 \n\t"
"addiu %[p_in], -8 \n\t"
"madd.s %[sum_out8], %[sum_out8], %[fc_val], $f6 \n\t"
"madd.s %[sum_out7], %[sum_out7], %[fc_val], $f5 \n\t"
"madd.s %[sum_out6], %[sum_out6], %[fc_val], $f4 \n\t"
"madd.s %[sum_out5], %[sum_out5], %[fc_val], $f3 \n\t"
"madd.s %[sum_out4], %[sum_out4], %[fc_val], $f2 \n\t"
"madd.s %[sum_out3], %[sum_out3], %[fc_val], $f1 \n\t"
"madd.s %[sum_out2], %[sum_out2], %[fc_val], $f0 \n\t"
"madd.s %[sum_out1], %[sum_out1], %[fc_val], $f7 \n\t"
"bgtz %[i], filt_lp_inner%= \n\t"
: [sum_out8]"+f"(sum_out8), [sum_out7]"+f"(sum_out7),
[sum_out6]"+f"(sum_out6), [sum_out5]"+f"(sum_out5),
[sum_out4]"+f"(sum_out4), [sum_out3]"+f"(sum_out3),
[sum_out2]"+f"(sum_out2), [sum_out1]"+f"(sum_out1),
[fc_val]"=&f"(fc_val), [p_filter_coeffs]"+r"(p_filter_coeffs),
[p_in]"+r"(p_in), [i]"+r"(i)
:
: "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7", "memory"
);
out[n+7] = sum_out8;
out[n+6] = sum_out7;
out[n+5] = sum_out6;
out[n+4] = sum_out5;
out[n+3] = sum_out4;
out[n+2] = sum_out3;
out[n+1] = sum_out2;
out[n] = sum_out1;
}
}
#endif /* HAVE_INLINE_ASM */
void ff_celp_filter_init_mips(CELPFContext *c)
{
#if HAVE_INLINE_ASM
c->celp_lp_synthesis_filterf = ff_celp_lp_synthesis_filterf_mips;
c->celp_lp_zero_synthesis_filterf = ff_celp_lp_zero_synthesis_filterf_mips;
#endif
}