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-rw-r--r--libavcodec/mips/fft_mips.c530
1 files changed, 530 insertions, 0 deletions
diff --git a/libavcodec/mips/fft_mips.c b/libavcodec/mips/fft_mips.c
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+++ b/libavcodec/mips/fft_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: Stanislav Ocovaj (socovaj@mips.com)
+ * Author: Zoran Lukic (zoranl@mips.com)
+ *
+ * Optimized MDCT/IMDCT and FFT transforms
+ *
+ * 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
+ */
+#include "config.h"
+#include "libavcodec/fft.h"
+#include "fft_table.h"
+
+/**
+ * FFT transform
+ */
+
+#if HAVE_INLINE_ASM
+static void ff_fft_calc_mips(FFTContext *s, FFTComplex *z)
+{
+ int nbits, i, n, num_transforms, offset, step;
+ int n4, n2, n34;
+ FFTSample tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7, tmp8;
+ FFTComplex *tmpz;
+ float w_re, w_im;
+ float *w_re_ptr, *w_im_ptr;
+ const int fft_size = (1 << s->nbits);
+ int s_n = s->nbits;
+ int tem1, tem2;
+ float pom, pom1, pom2, pom3;
+ float temp, temp1, temp3, temp4;
+ FFTComplex * tmpz_n2, * tmpz_n34, * tmpz_n4;
+ FFTComplex * tmpz_n2_i, * tmpz_n34_i, * tmpz_n4_i, * tmpz_i;
+
+ /**
+ *num_transforms = (0x2aab >> (16 - s->nbits)) | 1;
+ */
+ __asm__ volatile (
+ "li %[tem1], 16 \n\t"
+ "sub %[s_n], %[tem1], %[s_n] \n\t"
+ "li %[tem2], 10923 \n\t"
+ "srav %[tem2], %[tem2], %[s_n] \n\t"
+ "ori %[num_t],%[tem2], 1 \n\t"
+ : [num_t]"=r"(num_transforms), [s_n]"+r"(s_n),
+ [tem1]"=&r"(tem1), [tem2]"=&r"(tem2)
+ );
+
+
+ for (n=0; n<num_transforms; n++) {
+ offset = fft_offsets_lut[n] << 2;
+ tmpz = z + offset;
+
+ tmp1 = tmpz[0].re + tmpz[1].re;
+ tmp5 = tmpz[2].re + tmpz[3].re;
+ tmp2 = tmpz[0].im + tmpz[1].im;
+ tmp6 = tmpz[2].im + tmpz[3].im;
+ tmp3 = tmpz[0].re - tmpz[1].re;
+ tmp8 = tmpz[2].im - tmpz[3].im;
+ tmp4 = tmpz[0].im - tmpz[1].im;
+ tmp7 = tmpz[2].re - tmpz[3].re;
+
+ tmpz[0].re = tmp1 + tmp5;
+ tmpz[2].re = tmp1 - tmp5;
+ tmpz[0].im = tmp2 + tmp6;
+ tmpz[2].im = tmp2 - tmp6;
+ tmpz[1].re = tmp3 + tmp8;
+ tmpz[3].re = tmp3 - tmp8;
+ tmpz[1].im = tmp4 - tmp7;
+ tmpz[3].im = tmp4 + tmp7;
+
+ }
+
+ if (fft_size < 8)
+ return;
+
+ num_transforms = (num_transforms >> 1) | 1;
+
+ for (n=0; n<num_transforms; n++) {
+ offset = fft_offsets_lut[n] << 3;
+ tmpz = z + offset;
+
+ __asm__ volatile (
+ "lwc1 %[tmp1], 32(%[tmpz]) \n\t"
+ "lwc1 %[pom], 40(%[tmpz]) \n\t"
+ "lwc1 %[tmp3], 48(%[tmpz]) \n\t"
+ "lwc1 %[pom1], 56(%[tmpz]) \n\t"
+ "lwc1 %[tmp2], 36(%[tmpz]) \n\t"
+ "lwc1 %[pom2], 44(%[tmpz]) \n\t"
+ "lwc1 %[pom3], 60(%[tmpz]) \n\t"
+ "lwc1 %[tmp4], 52(%[tmpz]) \n\t"
+ "add.s %[tmp1], %[tmp1], %[pom] \n\t" // tmp1 = tmpz[4].re + tmpz[5].re;
+ "add.s %[tmp3], %[tmp3], %[pom1] \n\t" // tmp3 = tmpz[6].re + tmpz[7].re;
+ "add.s %[tmp2], %[tmp2], %[pom2] \n\t" // tmp2 = tmpz[4].im + tmpz[5].im;
+ "lwc1 %[pom], 40(%[tmpz]) \n\t"
+ "add.s %[tmp4], %[tmp4], %[pom3] \n\t" // tmp4 = tmpz[6].im + tmpz[7].im;
+ "add.s %[tmp5], %[tmp1], %[tmp3] \n\t" // tmp5 = tmp1 + tmp3;
+ "sub.s %[tmp7], %[tmp1], %[tmp3] \n\t" // tmp7 = tmp1 - tmp3;
+ "lwc1 %[tmp1], 32(%[tmpz]) \n\t"
+ "lwc1 %[pom1], 44(%[tmpz]) \n\t"
+ "add.s %[tmp6], %[tmp2], %[tmp4] \n\t" // tmp6 = tmp2 + tmp4;
+ "sub.s %[tmp8], %[tmp2], %[tmp4] \n\t" // tmp8 = tmp2 - tmp4;
+ "lwc1 %[tmp2], 36(%[tmpz]) \n\t"
+ "lwc1 %[pom2], 56(%[tmpz]) \n\t"
+ "lwc1 %[pom3], 60(%[tmpz]) \n\t"
+ "lwc1 %[tmp3], 48(%[tmpz]) \n\t"
+ "lwc1 %[tmp4], 52(%[tmpz]) \n\t"
+ "sub.s %[tmp1], %[tmp1], %[pom] \n\t" // tmp1 = tmpz[4].re - tmpz[5].re;
+ "lwc1 %[pom], 0(%[tmpz]) \n\t"
+ "sub.s %[tmp2], %[tmp2], %[pom1] \n\t" // tmp2 = tmpz[4].im - tmpz[5].im;
+ "sub.s %[tmp3], %[tmp3], %[pom2] \n\t" // tmp3 = tmpz[6].re - tmpz[7].re;
+ "lwc1 %[pom2], 4(%[tmpz]) \n\t"
+ "sub.s %[pom1], %[pom], %[tmp5] \n\t"
+ "sub.s %[tmp4], %[tmp4], %[pom3] \n\t" // tmp4 = tmpz[6].im - tmpz[7].im;
+ "add.s %[pom3], %[pom], %[tmp5] \n\t"
+ "sub.s %[pom], %[pom2], %[tmp6] \n\t"
+ "add.s %[pom2], %[pom2], %[tmp6] \n\t"
+ "swc1 %[pom1], 32(%[tmpz]) \n\t" // tmpz[4].re = tmpz[0].re - tmp5;
+ "swc1 %[pom3], 0(%[tmpz]) \n\t" // tmpz[0].re = tmpz[0].re + tmp5;
+ "swc1 %[pom], 36(%[tmpz]) \n\t" // tmpz[4].im = tmpz[0].im - tmp6;
+ "swc1 %[pom2], 4(%[tmpz]) \n\t" // tmpz[0].im = tmpz[0].im + tmp6;
+ "lwc1 %[pom1], 16(%[tmpz]) \n\t"
+ "lwc1 %[pom3], 20(%[tmpz]) \n\t"
+ "li.s %[pom], 0.7071067812 \n\t" // float pom = 0.7071067812f;
+ "add.s %[temp1],%[tmp1], %[tmp2] \n\t"
+ "sub.s %[temp], %[pom1], %[tmp8] \n\t"
+ "add.s %[pom2], %[pom3], %[tmp7] \n\t"
+ "sub.s %[temp3],%[tmp3], %[tmp4] \n\t"
+ "sub.s %[temp4],%[tmp2], %[tmp1] \n\t"
+ "swc1 %[temp], 48(%[tmpz]) \n\t" // tmpz[6].re = tmpz[2].re - tmp8;
+ "swc1 %[pom2], 52(%[tmpz]) \n\t" // tmpz[6].im = tmpz[2].im + tmp7;
+ "add.s %[pom1], %[pom1], %[tmp8] \n\t"
+ "sub.s %[pom3], %[pom3], %[tmp7] \n\t"
+ "add.s %[tmp3], %[tmp3], %[tmp4] \n\t"
+ "mul.s %[tmp5], %[pom], %[temp1] \n\t" // tmp5 = pom * (tmp1 + tmp2);
+ "mul.s %[tmp7], %[pom], %[temp3] \n\t" // tmp7 = pom * (tmp3 - tmp4);
+ "mul.s %[tmp6], %[pom], %[temp4] \n\t" // tmp6 = pom * (tmp2 - tmp1);
+ "mul.s %[tmp8], %[pom], %[tmp3] \n\t" // tmp8 = pom * (tmp3 + tmp4);
+ "swc1 %[pom1], 16(%[tmpz]) \n\t" // tmpz[2].re = tmpz[2].re + tmp8;
+ "swc1 %[pom3], 20(%[tmpz]) \n\t" // tmpz[2].im = tmpz[2].im - tmp7;
+ "add.s %[tmp1], %[tmp5], %[tmp7] \n\t" // tmp1 = tmp5 + tmp7;
+ "sub.s %[tmp3], %[tmp5], %[tmp7] \n\t" // tmp3 = tmp5 - tmp7;
+ "add.s %[tmp2], %[tmp6], %[tmp8] \n\t" // tmp2 = tmp6 + tmp8;
+ "sub.s %[tmp4], %[tmp6], %[tmp8] \n\t" // tmp4 = tmp6 - tmp8;
+ "lwc1 %[temp], 8(%[tmpz]) \n\t"
+ "lwc1 %[temp1],12(%[tmpz]) \n\t"
+ "lwc1 %[pom], 24(%[tmpz]) \n\t"
+ "lwc1 %[pom2], 28(%[tmpz]) \n\t"
+ "sub.s %[temp4],%[temp], %[tmp1] \n\t"
+ "sub.s %[temp3],%[temp1], %[tmp2] \n\t"
+ "add.s %[temp], %[temp], %[tmp1] \n\t"
+ "add.s %[temp1],%[temp1], %[tmp2] \n\t"
+ "sub.s %[pom1], %[pom], %[tmp4] \n\t"
+ "add.s %[pom3], %[pom2], %[tmp3] \n\t"
+ "add.s %[pom], %[pom], %[tmp4] \n\t"
+ "sub.s %[pom2], %[pom2], %[tmp3] \n\t"
+ "swc1 %[temp4],40(%[tmpz]) \n\t" // tmpz[5].re = tmpz[1].re - tmp1;
+ "swc1 %[temp3],44(%[tmpz]) \n\t" // tmpz[5].im = tmpz[1].im - tmp2;
+ "swc1 %[temp], 8(%[tmpz]) \n\t" // tmpz[1].re = tmpz[1].re + tmp1;
+ "swc1 %[temp1],12(%[tmpz]) \n\t" // tmpz[1].im = tmpz[1].im + tmp2;
+ "swc1 %[pom1], 56(%[tmpz]) \n\t" // tmpz[7].re = tmpz[3].re - tmp4;
+ "swc1 %[pom3], 60(%[tmpz]) \n\t" // tmpz[7].im = tmpz[3].im + tmp3;
+ "swc1 %[pom], 24(%[tmpz]) \n\t" // tmpz[3].re = tmpz[3].re + tmp4;
+ "swc1 %[pom2], 28(%[tmpz]) \n\t" // tmpz[3].im = tmpz[3].im - tmp3;
+ : [tmp1]"=&f"(tmp1), [pom]"=&f"(pom), [pom1]"=&f"(pom1), [pom2]"=&f"(pom2),
+ [tmp3]"=&f"(tmp3), [tmp2]"=&f"(tmp2), [tmp4]"=&f"(tmp4), [tmp5]"=&f"(tmp5), [tmp7]"=&f"(tmp7),
+ [tmp6]"=&f"(tmp6), [tmp8]"=&f"(tmp8), [pom3]"=&f"(pom3),[temp]"=&f"(temp), [temp1]"=&f"(temp1),
+ [temp3]"=&f"(temp3), [temp4]"=&f"(temp4)
+ : [tmpz]"r"(tmpz)
+ : "memory"
+ );
+ }
+
+ step = 1 << (MAX_LOG2_NFFT - 4);
+ n4 = 4;
+
+ for (nbits=4; nbits<=s->nbits; nbits++) {
+ /*
+ * num_transforms = (num_transforms >> 1) | 1;
+ */
+ __asm__ volatile (
+ "sra %[num_t], %[num_t], 1 \n\t"
+ "ori %[num_t], %[num_t], 1 \n\t"
+
+ : [num_t] "+r" (num_transforms)
+ );
+ n2 = 2 * n4;
+ n34 = 3 * n4;
+
+ for (n=0; n<num_transforms; n++) {
+ offset = fft_offsets_lut[n] << nbits;
+ tmpz = z + offset;
+
+ tmpz_n2 = tmpz + n2;
+ tmpz_n4 = tmpz + n4;
+ tmpz_n34 = tmpz + n34;
+
+ __asm__ volatile (
+ "lwc1 %[pom1], 0(%[tmpz_n2]) \n\t"
+ "lwc1 %[pom], 0(%[tmpz_n34]) \n\t"
+ "lwc1 %[pom2], 4(%[tmpz_n2]) \n\t"
+ "lwc1 %[pom3], 4(%[tmpz_n34]) \n\t"
+ "lwc1 %[temp1],0(%[tmpz]) \n\t"
+ "lwc1 %[temp3],4(%[tmpz]) \n\t"
+ "add.s %[tmp5], %[pom1], %[pom] \n\t" // tmp5 = tmpz[ n2].re + tmpz[n34].re;
+ "sub.s %[tmp1], %[pom1], %[pom] \n\t" // tmp1 = tmpz[ n2].re - tmpz[n34].re;
+ "add.s %[tmp6], %[pom2], %[pom3] \n\t" // tmp6 = tmpz[ n2].im + tmpz[n34].im;
+ "sub.s %[tmp2], %[pom2], %[pom3] \n\t" // tmp2 = tmpz[ n2].im - tmpz[n34].im;
+ "sub.s %[temp], %[temp1], %[tmp5] \n\t"
+ "add.s %[temp1],%[temp1], %[tmp5] \n\t"
+ "sub.s %[temp4],%[temp3], %[tmp6] \n\t"
+ "add.s %[temp3],%[temp3], %[tmp6] \n\t"
+ "swc1 %[temp], 0(%[tmpz_n2]) \n\t" // tmpz[ n2].re = tmpz[ 0].re - tmp5;
+ "swc1 %[temp1],0(%[tmpz]) \n\t" // tmpz[ 0].re = tmpz[ 0].re + tmp5;
+ "lwc1 %[pom1], 0(%[tmpz_n4]) \n\t"
+ "swc1 %[temp4],4(%[tmpz_n2]) \n\t" // tmpz[ n2].im = tmpz[ 0].im - tmp6;
+ "lwc1 %[temp], 4(%[tmpz_n4]) \n\t"
+ "swc1 %[temp3],4(%[tmpz]) \n\t" // tmpz[ 0].im = tmpz[ 0].im + tmp6;
+ "sub.s %[pom], %[pom1], %[tmp2] \n\t"
+ "add.s %[pom1], %[pom1], %[tmp2] \n\t"
+ "add.s %[temp1],%[temp], %[tmp1] \n\t"
+ "sub.s %[temp], %[temp], %[tmp1] \n\t"
+ "swc1 %[pom], 0(%[tmpz_n34]) \n\t" // tmpz[n34].re = tmpz[n4].re - tmp2;
+ "swc1 %[pom1], 0(%[tmpz_n4]) \n\t" // tmpz[ n4].re = tmpz[n4].re + tmp2;
+ "swc1 %[temp1],4(%[tmpz_n34]) \n\t" // tmpz[n34].im = tmpz[n4].im + tmp1;
+ "swc1 %[temp], 4(%[tmpz_n4]) \n\t" // tmpz[ n4].im = tmpz[n4].im - tmp1;
+ : [tmp5]"=&f"(tmp5),
+ [tmp1]"=&f"(tmp1), [pom]"=&f"(pom), [pom1]"=&f"(pom1), [pom2]"=&f"(pom2),
+ [tmp2]"=&f"(tmp2), [tmp6]"=&f"(tmp6), [pom3]"=&f"(pom3),
+ [temp]"=&f"(temp), [temp1]"=&f"(temp1), [temp3]"=&f"(temp3), [temp4]"=&f"(temp4)
+ : [tmpz]"r"(tmpz), [tmpz_n2]"r"(tmpz_n2), [tmpz_n34]"r"(tmpz_n34), [tmpz_n4]"r"(tmpz_n4)
+ : "memory"
+ );
+
+ w_re_ptr = (float*)(ff_cos_65536 + step);
+ w_im_ptr = (float*)(ff_cos_65536 + MAX_FFT_SIZE/4 - step);
+
+ for (i=1; i<n4; i++) {
+ w_re = w_re_ptr[0];
+ w_im = w_im_ptr[0];
+ tmpz_n2_i = tmpz_n2 + i;
+ tmpz_n4_i = tmpz_n4 + i;
+ tmpz_n34_i= tmpz_n34 + i;
+ tmpz_i = tmpz + i;
+
+ __asm__ volatile (
+ "lwc1 %[temp], 0(%[tmpz_n2_i]) \n\t"
+ "lwc1 %[temp1], 4(%[tmpz_n2_i]) \n\t"
+ "lwc1 %[pom], 0(%[tmpz_n34_i]) \n\t"
+ "lwc1 %[pom1], 4(%[tmpz_n34_i]) \n\t"
+ "mul.s %[temp3], %[w_im], %[temp] \n\t"
+ "mul.s %[temp4], %[w_im], %[temp1] \n\t"
+ "mul.s %[pom2], %[w_im], %[pom1] \n\t"
+ "mul.s %[pom3], %[w_im], %[pom] \n\t"
+ "msub.s %[tmp2], %[temp3], %[w_re], %[temp1] \n\t" // tmp2 = w_re * tmpz[ n2+i].im - w_im * tmpz[ n2+i].re;
+ "madd.s %[tmp1], %[temp4], %[w_re], %[temp] \n\t" // tmp1 = w_re * tmpz[ n2+i].re + w_im * tmpz[ n2+i].im;
+ "msub.s %[tmp3], %[pom2], %[w_re], %[pom] \n\t" // tmp3 = w_re * tmpz[n34+i].re - w_im * tmpz[n34+i].im;
+ "madd.s %[tmp4], %[pom3], %[w_re], %[pom1] \n\t" // tmp4 = w_re * tmpz[n34+i].im + w_im * tmpz[n34+i].re;
+ "lwc1 %[temp], 0(%[tmpz_i]) \n\t"
+ "lwc1 %[pom], 4(%[tmpz_i]) \n\t"
+ "add.s %[tmp5], %[tmp1], %[tmp3] \n\t" // tmp5 = tmp1 + tmp3;
+ "sub.s %[tmp1], %[tmp1], %[tmp3] \n\t" // tmp1 = tmp1 - tmp3;
+ "add.s %[tmp6], %[tmp2], %[tmp4] \n\t" // tmp6 = tmp2 + tmp4;
+ "sub.s %[tmp2], %[tmp2], %[tmp4] \n\t" // tmp2 = tmp2 - tmp4;
+ "sub.s %[temp1], %[temp], %[tmp5] \n\t"
+ "add.s %[temp], %[temp], %[tmp5] \n\t"
+ "sub.s %[pom1], %[pom], %[tmp6] \n\t"
+ "add.s %[pom], %[pom], %[tmp6] \n\t"
+ "lwc1 %[temp3], 0(%[tmpz_n4_i]) \n\t"
+ "lwc1 %[pom2], 4(%[tmpz_n4_i]) \n\t"
+ "swc1 %[temp1], 0(%[tmpz_n2_i]) \n\t" // tmpz[ n2+i].re = tmpz[ i].re - tmp5;
+ "swc1 %[temp], 0(%[tmpz_i]) \n\t" // tmpz[ i].re = tmpz[ i].re + tmp5;
+ "swc1 %[pom1], 4(%[tmpz_n2_i]) \n\t" // tmpz[ n2+i].im = tmpz[ i].im - tmp6;
+ "swc1 %[pom] , 4(%[tmpz_i]) \n\t" // tmpz[ i].im = tmpz[ i].im + tmp6;
+ "sub.s %[temp4], %[temp3], %[tmp2] \n\t"
+ "add.s %[pom3], %[pom2], %[tmp1] \n\t"
+ "add.s %[temp3], %[temp3], %[tmp2] \n\t"
+ "sub.s %[pom2], %[pom2], %[tmp1] \n\t"
+ "swc1 %[temp4], 0(%[tmpz_n34_i]) \n\t" // tmpz[n34+i].re = tmpz[n4+i].re - tmp2;
+ "swc1 %[pom3], 4(%[tmpz_n34_i]) \n\t" // tmpz[n34+i].im = tmpz[n4+i].im + tmp1;
+ "swc1 %[temp3], 0(%[tmpz_n4_i]) \n\t" // tmpz[ n4+i].re = tmpz[n4+i].re + tmp2;
+ "swc1 %[pom2], 4(%[tmpz_n4_i]) \n\t" // tmpz[ n4+i].im = tmpz[n4+i].im - tmp1;
+ : [tmp1]"=&f"(tmp1), [tmp2]"=&f" (tmp2), [temp]"=&f"(temp), [tmp3]"=&f"(tmp3),
+ [tmp4]"=&f"(tmp4), [tmp5]"=&f"(tmp5), [tmp6]"=&f"(tmp6),
+ [temp1]"=&f"(temp1), [temp3]"=&f"(temp3), [temp4]"=&f"(temp4),
+ [pom]"=&f"(pom), [pom1]"=&f"(pom1), [pom2]"=&f"(pom2), [pom3]"=&f"(pom3)
+ : [w_re]"f"(w_re), [w_im]"f"(w_im),
+ [tmpz_i]"r"(tmpz_i),[tmpz_n2_i]"r"(tmpz_n2_i),
+ [tmpz_n34_i]"r"(tmpz_n34_i), [tmpz_n4_i]"r"(tmpz_n4_i)
+ : "memory"
+ );
+ w_re_ptr += step;
+ w_im_ptr -= step;
+ }
+ }
+ step >>= 1;
+ n4 <<= 1;
+ }
+}
+
+/**
+ * MDCT/IMDCT transforms.
+ */
+
+static void ff_imdct_half_mips(FFTContext *s, FFTSample *output, const FFTSample *input)
+{
+ int k, n8, n4, n2, n, j;
+ const uint16_t *revtab = s->revtab;
+ const FFTSample *tcos = s->tcos;
+ const FFTSample *tsin = s->tsin;
+ const FFTSample *in1, *in2, *in3, *in4;
+ FFTComplex *z = (FFTComplex *)output;
+
+ int j1;
+ const float *tcos1, *tsin1, *tcos2, *tsin2;
+ float temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8,
+ temp9, temp10, temp11, temp12, temp13, temp14, temp15, temp16;
+ FFTComplex *z1, *z2;
+
+ n = 1 << s->mdct_bits;
+ n2 = n >> 1;
+ n4 = n >> 2;
+ n8 = n >> 3;
+
+ /* pre rotation */
+ in1 = input;
+ in2 = input + n2 - 1;
+ in3 = input + 2;
+ in4 = input + n2 - 3;
+
+ tcos1 = tcos;
+ tsin1 = tsin;
+
+ /* n4 = 64 or 128 */
+ for(k = 0; k < n4; k += 2) {
+ j = revtab[k ];
+ j1 = revtab[k + 1];
+
+ __asm__ volatile (
+ "lwc1 %[temp1], 0(%[in2]) \t\n"
+ "lwc1 %[temp2], 0(%[tcos1]) \t\n"
+ "lwc1 %[temp3], 0(%[tsin1]) \t\n"
+ "lwc1 %[temp4], 0(%[in1]) \t\n"
+ "lwc1 %[temp5], 0(%[in4]) \t\n"
+ "mul.s %[temp9], %[temp1], %[temp2] \t\n"
+ "mul.s %[temp10], %[temp1], %[temp3] \t\n"
+ "lwc1 %[temp6], 4(%[tcos1]) \t\n"
+ "lwc1 %[temp7], 4(%[tsin1]) \t\n"
+ "nmsub.s %[temp9], %[temp9], %[temp4], %[temp3] \t\n"
+ "madd.s %[temp10], %[temp10], %[temp4], %[temp2] \t\n"
+ "mul.s %[temp11], %[temp5], %[temp6] \t\n"
+ "mul.s %[temp12], %[temp5], %[temp7] \t\n"
+ "lwc1 %[temp8], 0(%[in3]) \t\n"
+ "addiu %[tcos1], %[tcos1], 8 \t\n"
+ "addiu %[tsin1], %[tsin1], 8 \t\n"
+ "addiu %[in1], %[in1], 16 \t\n"
+ "nmsub.s %[temp11], %[temp11], %[temp8], %[temp7] \t\n"
+ "madd.s %[temp12], %[temp12], %[temp8], %[temp6] \t\n"
+ "addiu %[in2], %[in2], -16 \t\n"
+ "addiu %[in3], %[in3], 16 \t\n"
+ "addiu %[in4], %[in4], -16 \t\n"
+
+ : [temp1]"=&f"(temp1), [temp2]"=&f"(temp2),
+ [temp3]"=&f"(temp3), [temp4]"=&f"(temp4),
+ [temp5]"=&f"(temp5), [temp6]"=&f"(temp6),
+ [temp7]"=&f"(temp7), [temp8]"=&f"(temp8),
+ [temp9]"=&f"(temp9), [temp10]"=&f"(temp10),
+ [temp11]"=&f"(temp11), [temp12]"=&f"(temp12),
+ [tsin1]"+r"(tsin1), [tcos1]"+r"(tcos1),
+ [in1]"+r"(in1), [in2]"+r"(in2),
+ [in3]"+r"(in3), [in4]"+r"(in4)
+ );
+
+ z[j ].re = temp9;
+ z[j ].im = temp10;
+ z[j1].re = temp11;
+ z[j1].im = temp12;
+ }
+
+ s->fft_calc(s, z);
+
+ /* post rotation + reordering */
+ /* n8 = 32 or 64 */
+ for(k = 0; k < n8; k += 2) {
+ tcos1 = &tcos[n8 - k - 2];
+ tsin1 = &tsin[n8 - k - 2];
+ tcos2 = &tcos[n8 + k];
+ tsin2 = &tsin[n8 + k];
+ z1 = &z[n8 - k - 2];
+ z2 = &z[n8 + k ];
+
+ __asm__ volatile (
+ "lwc1 %[temp1], 12(%[z1]) \t\n"
+ "lwc1 %[temp2], 4(%[tsin1]) \t\n"
+ "lwc1 %[temp3], 4(%[tcos1]) \t\n"
+ "lwc1 %[temp4], 8(%[z1]) \t\n"
+ "lwc1 %[temp5], 4(%[z1]) \t\n"
+ "mul.s %[temp9], %[temp1], %[temp2] \t\n"
+ "mul.s %[temp10], %[temp1], %[temp3] \t\n"
+ "lwc1 %[temp6], 0(%[tsin1]) \t\n"
+ "lwc1 %[temp7], 0(%[tcos1]) \t\n"
+ "nmsub.s %[temp9], %[temp9], %[temp4], %[temp3] \t\n"
+ "madd.s %[temp10], %[temp10], %[temp4], %[temp2] \t\n"
+ "mul.s %[temp11], %[temp5], %[temp6] \t\n"
+ "mul.s %[temp12], %[temp5], %[temp7] \t\n"
+ "lwc1 %[temp8], 0(%[z1]) \t\n"
+ "lwc1 %[temp1], 4(%[z2]) \t\n"
+ "lwc1 %[temp2], 0(%[tsin2]) \t\n"
+ "lwc1 %[temp3], 0(%[tcos2]) \t\n"
+ "nmsub.s %[temp11], %[temp11], %[temp8], %[temp7] \t\n"
+ "madd.s %[temp12], %[temp12], %[temp8], %[temp6] \t\n"
+ "mul.s %[temp13], %[temp1], %[temp2] \t\n"
+ "mul.s %[temp14], %[temp1], %[temp3] \t\n"
+ "lwc1 %[temp4], 0(%[z2]) \t\n"
+ "lwc1 %[temp5], 12(%[z2]) \t\n"
+ "lwc1 %[temp6], 4(%[tsin2]) \t\n"
+ "lwc1 %[temp7], 4(%[tcos2]) \t\n"
+ "nmsub.s %[temp13], %[temp13], %[temp4], %[temp3] \t\n"
+ "madd.s %[temp14], %[temp14], %[temp4], %[temp2] \t\n"
+ "mul.s %[temp15], %[temp5], %[temp6] \t\n"
+ "mul.s %[temp16], %[temp5], %[temp7] \t\n"
+ "lwc1 %[temp8], 8(%[z2]) \t\n"
+ "nmsub.s %[temp15], %[temp15], %[temp8], %[temp7] \t\n"
+ "madd.s %[temp16], %[temp16], %[temp8], %[temp6] \t\n"
+ : [temp1]"=&f"(temp1), [temp2]"=&f"(temp2),
+ [temp3]"=&f"(temp3), [temp4]"=&f"(temp4),
+ [temp5]"=&f"(temp5), [temp6]"=&f"(temp6),
+ [temp7]"=&f"(temp7), [temp8]"=&f"(temp8),
+ [temp9]"=&f"(temp9), [temp10]"=&f"(temp10),
+ [temp11]"=&f"(temp11), [temp12]"=&f"(temp12),
+ [temp13]"=&f"(temp13), [temp14]"=&f"(temp14),
+ [temp15]"=&f"(temp15), [temp16]"=&f"(temp16)
+ : [z1]"r"(z1), [z2]"r"(z2),
+ [tsin1]"r"(tsin1), [tcos1]"r"(tcos1),
+ [tsin2]"r"(tsin2), [tcos2]"r"(tcos2)
+ );
+
+ z1[1].re = temp9;
+ z1[1].im = temp14;
+ z2[0].re = temp13;
+ z2[0].im = temp10;
+
+ z1[0].re = temp11;
+ z1[0].im = temp16;
+ z2[1].re = temp15;
+ z2[1].im = temp12;
+ }
+}
+
+/**
+ * Compute inverse MDCT of size N = 2^nbits
+ * @param output N samples
+ * @param input N/2 samples
+ */
+static void ff_imdct_calc_mips(FFTContext *s, FFTSample *output, const FFTSample *input)
+{
+ int k;
+ int n = 1 << s->mdct_bits;
+ int n2 = n >> 1;
+ int n4 = n >> 2;
+
+ ff_imdct_half_mips(s, output+n4, input);
+
+ for(k = 0; k < n4; k+=4) {
+ output[k] = -output[n2-k-1];
+ output[k+1] = -output[n2-k-2];
+ output[k+2] = -output[n2-k-3];
+ output[k+3] = -output[n2-k-4];
+
+ output[n-k-1] = output[n2+k];
+ output[n-k-2] = output[n2+k+1];
+ output[n-k-3] = output[n2+k+2];
+ output[n-k-4] = output[n2+k+3];
+ }
+}
+#endif /* HAVE_INLINE_ASM */
+
+av_cold void ff_fft_init_mips(FFTContext *s)
+{
+ int n=0;
+
+ ff_fft_lut_init(fft_offsets_lut, 0, 1 << 16, &n);
+
+#if HAVE_INLINE_ASM
+ s->fft_calc = ff_fft_calc_mips;
+#if CONFIG_MDCT
+ s->imdct_calc = ff_imdct_calc_mips;
+ s->imdct_half = ff_imdct_half_mips;
+#endif
+#endif
+}
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