/* * 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 "libavcodec/fft_table.h" #include "libavutil/mips/asmdefs.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); 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; for (n=0; n<num_transforms; n++) { offset = ff_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 = ff_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; n2 = 2 * n4; n34 = 3 * n4; for (n=0; n<num_transforms; n++) { offset = ff_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" PTR_ADDIU " %[tcos1], %[tcos1], 8 \t\n" PTR_ADDIU " %[tsin1], %[tsin1], 8 \t\n" PTR_ADDIU " %[in1], %[in1], 16 \t\n" "nmsub.s %[temp11], %[temp11], %[temp8], %[temp7] \t\n" "madd.s %[temp12], %[temp12], %[temp8], %[temp6] \t\n" PTR_ADDIU " %[in2], %[in2], -16 \t\n" PTR_ADDIU " %[in3], %[in3], 16 \t\n" PTR_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) : : "memory" ); 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) : "memory" ); 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(ff_fft_offsets_lut, 0, 1 << 16, &n); ff_init_ff_cos_tabs(16); #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 }