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diff --git a/libavcodec/mips/celp_filters_mips.c b/libavcodec/mips/celp_filters_mips.c
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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 (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 "libavutil/attributes.h"
+#include "libavutil/common.h"
+#include "libavcodec/celp_filters.h"
+
+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"
+ );
+
+ 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"
+ );
+ 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)
+ );
+ }
+ 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"
+ );
+
+ 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;
+ }
+}
+
+void ff_celp_filter_init_mips(CELPFContext *c)
+{
+ c->celp_lp_synthesis_filterf = ff_celp_lp_synthesis_filterf_mips;
+ c->celp_lp_zero_synthesis_filterf = ff_celp_lp_zero_synthesis_filterf_mips;
+}
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