1/* 2 * Copyright (c) 2012 3 * MIPS Technologies, Inc., California. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its 14 * contributors may be used to endorse or promote products derived from 15 * this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * Author: Stanislav Ocovaj (socovaj@mips.com) 30 * Author: Zoran Lukic (zoranl@mips.com) 31 * 32 * Optimized MDCT/IMDCT and FFT transforms 33 * 34 * This file is part of FFmpeg. 35 * 36 * FFmpeg is free software; you can redistribute it and/or 37 * modify it under the terms of the GNU Lesser General Public 38 * License as published by the Free Software Foundation; either 39 * version 2.1 of the License, or (at your option) any later version. 40 * 41 * FFmpeg is distributed in the hope that it will be useful, 42 * but WITHOUT ANY WARRANTY; without even the implied warranty of 43 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 44 * Lesser General Public License for more details. 45 * 46 * You should have received a copy of the GNU Lesser General Public 47 * License along with FFmpeg; if not, write to the Free Software 48 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 49 */ 50#include "config.h" 51#include "libavutil/attributes.h" 52#include "libavcodec/fft.h" 53#include "libavcodec/fft_table.h" 54#include "libavutil/mips/asmdefs.h" 55 56/** 57 * FFT transform 58 */ 59 60#if HAVE_INLINE_ASM 61#if !HAVE_MIPS32R6 && !HAVE_MIPS64R6 62static void ff_fft_calc_mips(FFTContext *s, FFTComplex *z) 63{ 64 int nbits, i, n, num_transforms, offset, step; 65 int n4, n2, n34; 66 FFTSample tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7, tmp8; 67 FFTComplex *tmpz; 68 float w_re, w_im; 69 float *w_re_ptr, *w_im_ptr; 70 const int fft_size = (1 << s->nbits); 71 float pom, pom1, pom2, pom3; 72 float temp, temp1, temp3, temp4; 73 FFTComplex * tmpz_n2, * tmpz_n34, * tmpz_n4; 74 FFTComplex * tmpz_n2_i, * tmpz_n34_i, * tmpz_n4_i, * tmpz_i; 75 float f1 = 0.7071067812; 76 77 num_transforms = (21845 >> (17 - s->nbits)) | 1; 78 79 for (n=0; n<num_transforms; n++) { 80 offset = ff_fft_offsets_lut[n] << 2; 81 tmpz = z + offset; 82 83 tmp1 = tmpz[0].re + tmpz[1].re; 84 tmp5 = tmpz[2].re + tmpz[3].re; 85 tmp2 = tmpz[0].im + tmpz[1].im; 86 tmp6 = tmpz[2].im + tmpz[3].im; 87 tmp3 = tmpz[0].re - tmpz[1].re; 88 tmp8 = tmpz[2].im - tmpz[3].im; 89 tmp4 = tmpz[0].im - tmpz[1].im; 90 tmp7 = tmpz[2].re - tmpz[3].re; 91 92 tmpz[0].re = tmp1 + tmp5; 93 tmpz[2].re = tmp1 - tmp5; 94 tmpz[0].im = tmp2 + tmp6; 95 tmpz[2].im = tmp2 - tmp6; 96 tmpz[1].re = tmp3 + tmp8; 97 tmpz[3].re = tmp3 - tmp8; 98 tmpz[1].im = tmp4 - tmp7; 99 tmpz[3].im = tmp4 + tmp7; 100 101 } 102 103 if (fft_size < 8) 104 return; 105 106 num_transforms = (num_transforms >> 1) | 1; 107 108 for (n=0; n<num_transforms; n++) { 109 offset = ff_fft_offsets_lut[n] << 3; 110 tmpz = z + offset; 111 112 __asm__ volatile ( 113 "lwc1 %[tmp1], 32(%[tmpz]) \n\t" 114 "lwc1 %[pom], 40(%[tmpz]) \n\t" 115 "lwc1 %[tmp3], 48(%[tmpz]) \n\t" 116 "lwc1 %[pom1], 56(%[tmpz]) \n\t" 117 "lwc1 %[tmp2], 36(%[tmpz]) \n\t" 118 "lwc1 %[pom2], 44(%[tmpz]) \n\t" 119 "lwc1 %[pom3], 60(%[tmpz]) \n\t" 120 "lwc1 %[tmp4], 52(%[tmpz]) \n\t" 121 "add.s %[tmp1], %[tmp1], %[pom] \n\t" // tmp1 = tmpz[4].re + tmpz[5].re; 122 "add.s %[tmp3], %[tmp3], %[pom1] \n\t" // tmp3 = tmpz[6].re + tmpz[7].re; 123 "add.s %[tmp2], %[tmp2], %[pom2] \n\t" // tmp2 = tmpz[4].im + tmpz[5].im; 124 "lwc1 %[pom], 40(%[tmpz]) \n\t" 125 "add.s %[tmp4], %[tmp4], %[pom3] \n\t" // tmp4 = tmpz[6].im + tmpz[7].im; 126 "add.s %[tmp5], %[tmp1], %[tmp3] \n\t" // tmp5 = tmp1 + tmp3; 127 "sub.s %[tmp7], %[tmp1], %[tmp3] \n\t" // tmp7 = tmp1 - tmp3; 128 "lwc1 %[tmp1], 32(%[tmpz]) \n\t" 129 "lwc1 %[pom1], 44(%[tmpz]) \n\t" 130 "add.s %[tmp6], %[tmp2], %[tmp4] \n\t" // tmp6 = tmp2 + tmp4; 131 "sub.s %[tmp8], %[tmp2], %[tmp4] \n\t" // tmp8 = tmp2 - tmp4; 132 "lwc1 %[tmp2], 36(%[tmpz]) \n\t" 133 "lwc1 %[pom2], 56(%[tmpz]) \n\t" 134 "lwc1 %[pom3], 60(%[tmpz]) \n\t" 135 "lwc1 %[tmp3], 48(%[tmpz]) \n\t" 136 "lwc1 %[tmp4], 52(%[tmpz]) \n\t" 137 "sub.s %[tmp1], %[tmp1], %[pom] \n\t" // tmp1 = tmpz[4].re - tmpz[5].re; 138 "lwc1 %[pom], 0(%[tmpz]) \n\t" 139 "sub.s %[tmp2], %[tmp2], %[pom1] \n\t" // tmp2 = tmpz[4].im - tmpz[5].im; 140 "sub.s %[tmp3], %[tmp3], %[pom2] \n\t" // tmp3 = tmpz[6].re - tmpz[7].re; 141 "lwc1 %[pom2], 4(%[tmpz]) \n\t" 142 "sub.s %[pom1], %[pom], %[tmp5] \n\t" 143 "sub.s %[tmp4], %[tmp4], %[pom3] \n\t" // tmp4 = tmpz[6].im - tmpz[7].im; 144 "add.s %[pom3], %[pom], %[tmp5] \n\t" 145 "sub.s %[pom], %[pom2], %[tmp6] \n\t" 146 "add.s %[pom2], %[pom2], %[tmp6] \n\t" 147 "swc1 %[pom1], 32(%[tmpz]) \n\t" // tmpz[4].re = tmpz[0].re - tmp5; 148 "swc1 %[pom3], 0(%[tmpz]) \n\t" // tmpz[0].re = tmpz[0].re + tmp5; 149 "swc1 %[pom], 36(%[tmpz]) \n\t" // tmpz[4].im = tmpz[0].im - tmp6; 150 "swc1 %[pom2], 4(%[tmpz]) \n\t" // tmpz[0].im = tmpz[0].im + tmp6; 151 "lwc1 %[pom1], 16(%[tmpz]) \n\t" 152 "lwc1 %[pom3], 20(%[tmpz]) \n\t" 153 "add.s %[temp1],%[tmp1], %[tmp2] \n\t" 154 "sub.s %[temp], %[pom1], %[tmp8] \n\t" 155 "add.s %[pom2], %[pom3], %[tmp7] \n\t" 156 "sub.s %[temp3],%[tmp3], %[tmp4] \n\t" 157 "sub.s %[temp4],%[tmp2], %[tmp1] \n\t" 158 "swc1 %[temp], 48(%[tmpz]) \n\t" // tmpz[6].re = tmpz[2].re - tmp8; 159 "swc1 %[pom2], 52(%[tmpz]) \n\t" // tmpz[6].im = tmpz[2].im + tmp7; 160 "add.s %[pom1], %[pom1], %[tmp8] \n\t" 161 "sub.s %[pom3], %[pom3], %[tmp7] \n\t" 162 "add.s %[tmp3], %[tmp3], %[tmp4] \n\t" 163 "mul.s %[tmp5], %[f1], %[temp1] \n\t" // tmp5 = pom * (tmp1 + tmp2); 164 "mul.s %[tmp7], %[f1], %[temp3] \n\t" // tmp7 = pom * (tmp3 - tmp4); 165 "mul.s %[tmp6], %[f1], %[temp4] \n\t" // tmp6 = pom * (tmp2 - tmp1); 166 "mul.s %[tmp8], %[f1], %[tmp3] \n\t" // tmp8 = pom * (tmp3 + tmp4); 167 "swc1 %[pom1], 16(%[tmpz]) \n\t" // tmpz[2].re = tmpz[2].re + tmp8; 168 "swc1 %[pom3], 20(%[tmpz]) \n\t" // tmpz[2].im = tmpz[2].im - tmp7; 169 "add.s %[tmp1], %[tmp5], %[tmp7] \n\t" // tmp1 = tmp5 + tmp7; 170 "sub.s %[tmp3], %[tmp5], %[tmp7] \n\t" // tmp3 = tmp5 - tmp7; 171 "add.s %[tmp2], %[tmp6], %[tmp8] \n\t" // tmp2 = tmp6 + tmp8; 172 "sub.s %[tmp4], %[tmp6], %[tmp8] \n\t" // tmp4 = tmp6 - tmp8; 173 "lwc1 %[temp], 8(%[tmpz]) \n\t" 174 "lwc1 %[temp1],12(%[tmpz]) \n\t" 175 "lwc1 %[pom], 24(%[tmpz]) \n\t" 176 "lwc1 %[pom2], 28(%[tmpz]) \n\t" 177 "sub.s %[temp4],%[temp], %[tmp1] \n\t" 178 "sub.s %[temp3],%[temp1], %[tmp2] \n\t" 179 "add.s %[temp], %[temp], %[tmp1] \n\t" 180 "add.s %[temp1],%[temp1], %[tmp2] \n\t" 181 "sub.s %[pom1], %[pom], %[tmp4] \n\t" 182 "add.s %[pom3], %[pom2], %[tmp3] \n\t" 183 "add.s %[pom], %[pom], %[tmp4] \n\t" 184 "sub.s %[pom2], %[pom2], %[tmp3] \n\t" 185 "swc1 %[temp4],40(%[tmpz]) \n\t" // tmpz[5].re = tmpz[1].re - tmp1; 186 "swc1 %[temp3],44(%[tmpz]) \n\t" // tmpz[5].im = tmpz[1].im - tmp2; 187 "swc1 %[temp], 8(%[tmpz]) \n\t" // tmpz[1].re = tmpz[1].re + tmp1; 188 "swc1 %[temp1],12(%[tmpz]) \n\t" // tmpz[1].im = tmpz[1].im + tmp2; 189 "swc1 %[pom1], 56(%[tmpz]) \n\t" // tmpz[7].re = tmpz[3].re - tmp4; 190 "swc1 %[pom3], 60(%[tmpz]) \n\t" // tmpz[7].im = tmpz[3].im + tmp3; 191 "swc1 %[pom], 24(%[tmpz]) \n\t" // tmpz[3].re = tmpz[3].re + tmp4; 192 "swc1 %[pom2], 28(%[tmpz]) \n\t" // tmpz[3].im = tmpz[3].im - tmp3; 193 : [tmp1]"=&f"(tmp1), [pom]"=&f"(pom), [pom1]"=&f"(pom1), [pom2]"=&f"(pom2), 194 [tmp3]"=&f"(tmp3), [tmp2]"=&f"(tmp2), [tmp4]"=&f"(tmp4), [tmp5]"=&f"(tmp5), [tmp7]"=&f"(tmp7), 195 [tmp6]"=&f"(tmp6), [tmp8]"=&f"(tmp8), [pom3]"=&f"(pom3),[temp]"=&f"(temp), [temp1]"=&f"(temp1), 196 [temp3]"=&f"(temp3), [temp4]"=&f"(temp4) 197 : [tmpz]"r"(tmpz), [f1]"f"(f1) 198 : "memory" 199 ); 200 } 201 202 step = 1 << (MAX_LOG2_NFFT - 4); 203 n4 = 4; 204 205 for (nbits=4; nbits<=s->nbits; nbits++) { 206 num_transforms = (num_transforms >> 1) | 1; 207 n2 = 2 * n4; 208 n34 = 3 * n4; 209 210 for (n=0; n<num_transforms; n++) { 211 offset = ff_fft_offsets_lut[n] << nbits; 212 tmpz = z + offset; 213 214 tmpz_n2 = tmpz + n2; 215 tmpz_n4 = tmpz + n4; 216 tmpz_n34 = tmpz + n34; 217 218 __asm__ volatile ( 219 "lwc1 %[pom1], 0(%[tmpz_n2]) \n\t" 220 "lwc1 %[pom], 0(%[tmpz_n34]) \n\t" 221 "lwc1 %[pom2], 4(%[tmpz_n2]) \n\t" 222 "lwc1 %[pom3], 4(%[tmpz_n34]) \n\t" 223 "lwc1 %[temp1],0(%[tmpz]) \n\t" 224 "lwc1 %[temp3],4(%[tmpz]) \n\t" 225 "add.s %[tmp5], %[pom1], %[pom] \n\t" // tmp5 = tmpz[ n2].re + tmpz[n34].re; 226 "sub.s %[tmp1], %[pom1], %[pom] \n\t" // tmp1 = tmpz[ n2].re - tmpz[n34].re; 227 "add.s %[tmp6], %[pom2], %[pom3] \n\t" // tmp6 = tmpz[ n2].im + tmpz[n34].im; 228 "sub.s %[tmp2], %[pom2], %[pom3] \n\t" // tmp2 = tmpz[ n2].im - tmpz[n34].im; 229 "sub.s %[temp], %[temp1], %[tmp5] \n\t" 230 "add.s %[temp1],%[temp1], %[tmp5] \n\t" 231 "sub.s %[temp4],%[temp3], %[tmp6] \n\t" 232 "add.s %[temp3],%[temp3], %[tmp6] \n\t" 233 "swc1 %[temp], 0(%[tmpz_n2]) \n\t" // tmpz[ n2].re = tmpz[ 0].re - tmp5; 234 "swc1 %[temp1],0(%[tmpz]) \n\t" // tmpz[ 0].re = tmpz[ 0].re + tmp5; 235 "lwc1 %[pom1], 0(%[tmpz_n4]) \n\t" 236 "swc1 %[temp4],4(%[tmpz_n2]) \n\t" // tmpz[ n2].im = tmpz[ 0].im - tmp6; 237 "lwc1 %[temp], 4(%[tmpz_n4]) \n\t" 238 "swc1 %[temp3],4(%[tmpz]) \n\t" // tmpz[ 0].im = tmpz[ 0].im + tmp6; 239 "sub.s %[pom], %[pom1], %[tmp2] \n\t" 240 "add.s %[pom1], %[pom1], %[tmp2] \n\t" 241 "add.s %[temp1],%[temp], %[tmp1] \n\t" 242 "sub.s %[temp], %[temp], %[tmp1] \n\t" 243 "swc1 %[pom], 0(%[tmpz_n34]) \n\t" // tmpz[n34].re = tmpz[n4].re - tmp2; 244 "swc1 %[pom1], 0(%[tmpz_n4]) \n\t" // tmpz[ n4].re = tmpz[n4].re + tmp2; 245 "swc1 %[temp1],4(%[tmpz_n34]) \n\t" // tmpz[n34].im = tmpz[n4].im + tmp1; 246 "swc1 %[temp], 4(%[tmpz_n4]) \n\t" // tmpz[ n4].im = tmpz[n4].im - tmp1; 247 : [tmp5]"=&f"(tmp5), 248 [tmp1]"=&f"(tmp1), [pom]"=&f"(pom), [pom1]"=&f"(pom1), [pom2]"=&f"(pom2), 249 [tmp2]"=&f"(tmp2), [tmp6]"=&f"(tmp6), [pom3]"=&f"(pom3), 250 [temp]"=&f"(temp), [temp1]"=&f"(temp1), [temp3]"=&f"(temp3), [temp4]"=&f"(temp4) 251 : [tmpz]"r"(tmpz), [tmpz_n2]"r"(tmpz_n2), [tmpz_n34]"r"(tmpz_n34), [tmpz_n4]"r"(tmpz_n4) 252 : "memory" 253 ); 254 255 w_re_ptr = (float*)(ff_cos_131072 + step); 256 w_im_ptr = (float*)(ff_cos_131072 + MAX_FFT_SIZE/4 - step); 257 258 for (i=1; i<n4; i++) { 259 w_re = w_re_ptr[0]; 260 w_im = w_im_ptr[0]; 261 tmpz_n2_i = tmpz_n2 + i; 262 tmpz_n4_i = tmpz_n4 + i; 263 tmpz_n34_i= tmpz_n34 + i; 264 tmpz_i = tmpz + i; 265 266 __asm__ volatile ( 267 "lwc1 %[temp], 0(%[tmpz_n2_i]) \n\t" 268 "lwc1 %[temp1], 4(%[tmpz_n2_i]) \n\t" 269 "lwc1 %[pom], 0(%[tmpz_n34_i]) \n\t" 270 "lwc1 %[pom1], 4(%[tmpz_n34_i]) \n\t" 271 "mul.s %[temp3], %[w_im], %[temp] \n\t" 272 "mul.s %[temp4], %[w_im], %[temp1] \n\t" 273 "mul.s %[pom2], %[w_im], %[pom1] \n\t" 274 "mul.s %[pom3], %[w_im], %[pom] \n\t" 275 "msub.s %[tmp2], %[temp3], %[w_re], %[temp1] \n\t" // tmp2 = w_re * tmpz[ n2+i].im - w_im * tmpz[ n2+i].re; 276 "madd.s %[tmp1], %[temp4], %[w_re], %[temp] \n\t" // tmp1 = w_re * tmpz[ n2+i].re + w_im * tmpz[ n2+i].im; 277 "msub.s %[tmp3], %[pom2], %[w_re], %[pom] \n\t" // tmp3 = w_re * tmpz[n34+i].re - w_im * tmpz[n34+i].im; 278 "madd.s %[tmp4], %[pom3], %[w_re], %[pom1] \n\t" // tmp4 = w_re * tmpz[n34+i].im + w_im * tmpz[n34+i].re; 279 "lwc1 %[temp], 0(%[tmpz_i]) \n\t" 280 "lwc1 %[pom], 4(%[tmpz_i]) \n\t" 281 "add.s %[tmp5], %[tmp1], %[tmp3] \n\t" // tmp5 = tmp1 + tmp3; 282 "sub.s %[tmp1], %[tmp1], %[tmp3] \n\t" // tmp1 = tmp1 - tmp3; 283 "add.s %[tmp6], %[tmp2], %[tmp4] \n\t" // tmp6 = tmp2 + tmp4; 284 "sub.s %[tmp2], %[tmp2], %[tmp4] \n\t" // tmp2 = tmp2 - tmp4; 285 "sub.s %[temp1], %[temp], %[tmp5] \n\t" 286 "add.s %[temp], %[temp], %[tmp5] \n\t" 287 "sub.s %[pom1], %[pom], %[tmp6] \n\t" 288 "add.s %[pom], %[pom], %[tmp6] \n\t" 289 "lwc1 %[temp3], 0(%[tmpz_n4_i]) \n\t" 290 "lwc1 %[pom2], 4(%[tmpz_n4_i]) \n\t" 291 "swc1 %[temp1], 0(%[tmpz_n2_i]) \n\t" // tmpz[ n2+i].re = tmpz[ i].re - tmp5; 292 "swc1 %[temp], 0(%[tmpz_i]) \n\t" // tmpz[ i].re = tmpz[ i].re + tmp5; 293 "swc1 %[pom1], 4(%[tmpz_n2_i]) \n\t" // tmpz[ n2+i].im = tmpz[ i].im - tmp6; 294 "swc1 %[pom] , 4(%[tmpz_i]) \n\t" // tmpz[ i].im = tmpz[ i].im + tmp6; 295 "sub.s %[temp4], %[temp3], %[tmp2] \n\t" 296 "add.s %[pom3], %[pom2], %[tmp1] \n\t" 297 "add.s %[temp3], %[temp3], %[tmp2] \n\t" 298 "sub.s %[pom2], %[pom2], %[tmp1] \n\t" 299 "swc1 %[temp4], 0(%[tmpz_n34_i]) \n\t" // tmpz[n34+i].re = tmpz[n4+i].re - tmp2; 300 "swc1 %[pom3], 4(%[tmpz_n34_i]) \n\t" // tmpz[n34+i].im = tmpz[n4+i].im + tmp1; 301 "swc1 %[temp3], 0(%[tmpz_n4_i]) \n\t" // tmpz[ n4+i].re = tmpz[n4+i].re + tmp2; 302 "swc1 %[pom2], 4(%[tmpz_n4_i]) \n\t" // tmpz[ n4+i].im = tmpz[n4+i].im - tmp1; 303 : [tmp1]"=&f"(tmp1), [tmp2]"=&f" (tmp2), [temp]"=&f"(temp), [tmp3]"=&f"(tmp3), 304 [tmp4]"=&f"(tmp4), [tmp5]"=&f"(tmp5), [tmp6]"=&f"(tmp6), 305 [temp1]"=&f"(temp1), [temp3]"=&f"(temp3), [temp4]"=&f"(temp4), 306 [pom]"=&f"(pom), [pom1]"=&f"(pom1), [pom2]"=&f"(pom2), [pom3]"=&f"(pom3) 307 : [w_re]"f"(w_re), [w_im]"f"(w_im), 308 [tmpz_i]"r"(tmpz_i),[tmpz_n2_i]"r"(tmpz_n2_i), 309 [tmpz_n34_i]"r"(tmpz_n34_i), [tmpz_n4_i]"r"(tmpz_n4_i) 310 : "memory" 311 ); 312 w_re_ptr += step; 313 w_im_ptr -= step; 314 } 315 } 316 step >>= 1; 317 n4 <<= 1; 318 } 319} 320 321/** 322 * MDCT/IMDCT transforms. 323 */ 324 325static void ff_imdct_half_mips(FFTContext *s, FFTSample *output, const FFTSample *input) 326{ 327 int k, n8, n4, n2, n, j; 328 const uint16_t *revtab = s->revtab; 329 const FFTSample *tcos = s->tcos; 330 const FFTSample *tsin = s->tsin; 331 const FFTSample *in1, *in2, *in3, *in4; 332 FFTComplex *z = (FFTComplex *)output; 333 334 int j1; 335 const float *tcos1, *tsin1, *tcos2, *tsin2; 336 float temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8, 337 temp9, temp10, temp11, temp12, temp13, temp14, temp15, temp16; 338 FFTComplex *z1, *z2; 339 340 n = 1 << s->mdct_bits; 341 n2 = n >> 1; 342 n4 = n >> 2; 343 n8 = n >> 3; 344 345 /* pre rotation */ 346 in1 = input; 347 in2 = input + n2 - 1; 348 in3 = input + 2; 349 in4 = input + n2 - 3; 350 351 tcos1 = tcos; 352 tsin1 = tsin; 353 354 /* n4 = 64 or 128 */ 355 for(k = 0; k < n4; k += 2) { 356 j = revtab[k ]; 357 j1 = revtab[k + 1]; 358 359 __asm__ volatile ( 360 "lwc1 %[temp1], 0(%[in2]) \t\n" 361 "lwc1 %[temp2], 0(%[tcos1]) \t\n" 362 "lwc1 %[temp3], 0(%[tsin1]) \t\n" 363 "lwc1 %[temp4], 0(%[in1]) \t\n" 364 "lwc1 %[temp5], 0(%[in4]) \t\n" 365 "mul.s %[temp9], %[temp1], %[temp2] \t\n" 366 "mul.s %[temp10], %[temp1], %[temp3] \t\n" 367 "lwc1 %[temp6], 4(%[tcos1]) \t\n" 368 "lwc1 %[temp7], 4(%[tsin1]) \t\n" 369 "nmsub.s %[temp9], %[temp9], %[temp4], %[temp3] \t\n" 370 "madd.s %[temp10], %[temp10], %[temp4], %[temp2] \t\n" 371 "mul.s %[temp11], %[temp5], %[temp6] \t\n" 372 "mul.s %[temp12], %[temp5], %[temp7] \t\n" 373 "lwc1 %[temp8], 0(%[in3]) \t\n" 374 PTR_ADDIU " %[tcos1], %[tcos1], 8 \t\n" 375 PTR_ADDIU " %[tsin1], %[tsin1], 8 \t\n" 376 PTR_ADDIU " %[in1], %[in1], 16 \t\n" 377 "nmsub.s %[temp11], %[temp11], %[temp8], %[temp7] \t\n" 378 "madd.s %[temp12], %[temp12], %[temp8], %[temp6] \t\n" 379 PTR_ADDIU " %[in2], %[in2], -16 \t\n" 380 PTR_ADDIU " %[in3], %[in3], 16 \t\n" 381 PTR_ADDIU " %[in4], %[in4], -16 \t\n" 382 383 : [temp1]"=&f"(temp1), [temp2]"=&f"(temp2), 384 [temp3]"=&f"(temp3), [temp4]"=&f"(temp4), 385 [temp5]"=&f"(temp5), [temp6]"=&f"(temp6), 386 [temp7]"=&f"(temp7), [temp8]"=&f"(temp8), 387 [temp9]"=&f"(temp9), [temp10]"=&f"(temp10), 388 [temp11]"=&f"(temp11), [temp12]"=&f"(temp12), 389 [tsin1]"+r"(tsin1), [tcos1]"+r"(tcos1), 390 [in1]"+r"(in1), [in2]"+r"(in2), 391 [in3]"+r"(in3), [in4]"+r"(in4) 392 : 393 : "memory" 394 ); 395 396 z[j ].re = temp9; 397 z[j ].im = temp10; 398 z[j1].re = temp11; 399 z[j1].im = temp12; 400 } 401 402 s->fft_calc(s, z); 403 404 /* post rotation + reordering */ 405 /* n8 = 32 or 64 */ 406 for(k = 0; k < n8; k += 2) { 407 tcos1 = &tcos[n8 - k - 2]; 408 tsin1 = &tsin[n8 - k - 2]; 409 tcos2 = &tcos[n8 + k]; 410 tsin2 = &tsin[n8 + k]; 411 z1 = &z[n8 - k - 2]; 412 z2 = &z[n8 + k ]; 413 414 __asm__ volatile ( 415 "lwc1 %[temp1], 12(%[z1]) \t\n" 416 "lwc1 %[temp2], 4(%[tsin1]) \t\n" 417 "lwc1 %[temp3], 4(%[tcos1]) \t\n" 418 "lwc1 %[temp4], 8(%[z1]) \t\n" 419 "lwc1 %[temp5], 4(%[z1]) \t\n" 420 "mul.s %[temp9], %[temp1], %[temp2] \t\n" 421 "mul.s %[temp10], %[temp1], %[temp3] \t\n" 422 "lwc1 %[temp6], 0(%[tsin1]) \t\n" 423 "lwc1 %[temp7], 0(%[tcos1]) \t\n" 424 "nmsub.s %[temp9], %[temp9], %[temp4], %[temp3] \t\n" 425 "madd.s %[temp10], %[temp10], %[temp4], %[temp2] \t\n" 426 "mul.s %[temp11], %[temp5], %[temp6] \t\n" 427 "mul.s %[temp12], %[temp5], %[temp7] \t\n" 428 "lwc1 %[temp8], 0(%[z1]) \t\n" 429 "lwc1 %[temp1], 4(%[z2]) \t\n" 430 "lwc1 %[temp2], 0(%[tsin2]) \t\n" 431 "lwc1 %[temp3], 0(%[tcos2]) \t\n" 432 "nmsub.s %[temp11], %[temp11], %[temp8], %[temp7] \t\n" 433 "madd.s %[temp12], %[temp12], %[temp8], %[temp6] \t\n" 434 "mul.s %[temp13], %[temp1], %[temp2] \t\n" 435 "mul.s %[temp14], %[temp1], %[temp3] \t\n" 436 "lwc1 %[temp4], 0(%[z2]) \t\n" 437 "lwc1 %[temp5], 12(%[z2]) \t\n" 438 "lwc1 %[temp6], 4(%[tsin2]) \t\n" 439 "lwc1 %[temp7], 4(%[tcos2]) \t\n" 440 "nmsub.s %[temp13], %[temp13], %[temp4], %[temp3] \t\n" 441 "madd.s %[temp14], %[temp14], %[temp4], %[temp2] \t\n" 442 "mul.s %[temp15], %[temp5], %[temp6] \t\n" 443 "mul.s %[temp16], %[temp5], %[temp7] \t\n" 444 "lwc1 %[temp8], 8(%[z2]) \t\n" 445 "nmsub.s %[temp15], %[temp15], %[temp8], %[temp7] \t\n" 446 "madd.s %[temp16], %[temp16], %[temp8], %[temp6] \t\n" 447 : [temp1]"=&f"(temp1), [temp2]"=&f"(temp2), 448 [temp3]"=&f"(temp3), [temp4]"=&f"(temp4), 449 [temp5]"=&f"(temp5), [temp6]"=&f"(temp6), 450 [temp7]"=&f"(temp7), [temp8]"=&f"(temp8), 451 [temp9]"=&f"(temp9), [temp10]"=&f"(temp10), 452 [temp11]"=&f"(temp11), [temp12]"=&f"(temp12), 453 [temp13]"=&f"(temp13), [temp14]"=&f"(temp14), 454 [temp15]"=&f"(temp15), [temp16]"=&f"(temp16) 455 : [z1]"r"(z1), [z2]"r"(z2), 456 [tsin1]"r"(tsin1), [tcos1]"r"(tcos1), 457 [tsin2]"r"(tsin2), [tcos2]"r"(tcos2) 458 : "memory" 459 ); 460 461 z1[1].re = temp9; 462 z1[1].im = temp14; 463 z2[0].re = temp13; 464 z2[0].im = temp10; 465 466 z1[0].re = temp11; 467 z1[0].im = temp16; 468 z2[1].re = temp15; 469 z2[1].im = temp12; 470 } 471} 472 473/** 474 * Compute inverse MDCT of size N = 2^nbits 475 * @param output N samples 476 * @param input N/2 samples 477 */ 478static void ff_imdct_calc_mips(FFTContext *s, FFTSample *output, const FFTSample *input) 479{ 480 int k; 481 int n = 1 << s->mdct_bits; 482 int n2 = n >> 1; 483 int n4 = n >> 2; 484 485 ff_imdct_half_mips(s, output+n4, input); 486 487 for(k = 0; k < n4; k+=4) { 488 output[k] = -output[n2-k-1]; 489 output[k+1] = -output[n2-k-2]; 490 output[k+2] = -output[n2-k-3]; 491 output[k+3] = -output[n2-k-4]; 492 493 output[n-k-1] = output[n2+k]; 494 output[n-k-2] = output[n2+k+1]; 495 output[n-k-3] = output[n2+k+2]; 496 output[n-k-4] = output[n2+k+3]; 497 } 498} 499#endif /* !HAVE_MIPS32R6 && !HAVE_MIPS64R6 */ 500#endif /* HAVE_INLINE_ASM */ 501 502av_cold void ff_fft_init_mips(FFTContext *s) 503{ 504 ff_fft_lut_init(); 505 ff_init_ff_cos_tabs(17); 506 507#if HAVE_INLINE_ASM 508#if !HAVE_MIPS32R6 && !HAVE_MIPS64R6 509 s->fft_calc = ff_fft_calc_mips; 510#if CONFIG_MDCT 511 s->imdct_calc = ff_imdct_calc_mips; 512 s->imdct_half = ff_imdct_half_mips; 513#endif 514#endif 515#endif 516} 517