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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 "libavcodec/fft.h" | |
52 | #include "libavcodec/fft_table.h" | |
53 | ||
54 | /** | |
55 | * FFT transform | |
56 | */ | |
57 | ||
58 | #if HAVE_INLINE_ASM | |
59 | static void ff_fft_calc_mips(FFTContext *s, FFTComplex *z) | |
60 | { | |
61 | int nbits, i, n, num_transforms, offset, step; | |
62 | int n4, n2, n34; | |
63 | FFTSample tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7, tmp8; | |
64 | FFTComplex *tmpz; | |
65 | float w_re, w_im; | |
66 | float *w_re_ptr, *w_im_ptr; | |
67 | const int fft_size = (1 << s->nbits); | |
68 | int s_n = s->nbits; | |
69 | int tem1, tem2; | |
70 | float pom, pom1, pom2, pom3; | |
71 | float temp, temp1, temp3, temp4; | |
72 | FFTComplex * tmpz_n2, * tmpz_n34, * tmpz_n4; | |
73 | FFTComplex * tmpz_n2_i, * tmpz_n34_i, * tmpz_n4_i, * tmpz_i; | |
74 | ||
75 | /** | |
76 | *num_transforms = (0x2aab >> (16 - s->nbits)) | 1; | |
77 | */ | |
78 | __asm__ volatile ( | |
79 | "li %[tem1], 16 \n\t" | |
80 | "sub %[s_n], %[tem1], %[s_n] \n\t" | |
81 | "li %[tem2], 10923 \n\t" | |
82 | "srav %[tem2], %[tem2], %[s_n] \n\t" | |
83 | "ori %[num_t],%[tem2], 1 \n\t" | |
84 | : [num_t]"=r"(num_transforms), [s_n]"+r"(s_n), | |
85 | [tem1]"=&r"(tem1), [tem2]"=&r"(tem2) | |
86 | ); | |
87 | ||
88 | ||
89 | for (n=0; n<num_transforms; n++) { | |
90 | offset = ff_fft_offsets_lut[n] << 2; | |
91 | tmpz = z + offset; | |
92 | ||
93 | tmp1 = tmpz[0].re + tmpz[1].re; | |
94 | tmp5 = tmpz[2].re + tmpz[3].re; | |
95 | tmp2 = tmpz[0].im + tmpz[1].im; | |
96 | tmp6 = tmpz[2].im + tmpz[3].im; | |
97 | tmp3 = tmpz[0].re - tmpz[1].re; | |
98 | tmp8 = tmpz[2].im - tmpz[3].im; | |
99 | tmp4 = tmpz[0].im - tmpz[1].im; | |
100 | tmp7 = tmpz[2].re - tmpz[3].re; | |
101 | ||
102 | tmpz[0].re = tmp1 + tmp5; | |
103 | tmpz[2].re = tmp1 - tmp5; | |
104 | tmpz[0].im = tmp2 + tmp6; | |
105 | tmpz[2].im = tmp2 - tmp6; | |
106 | tmpz[1].re = tmp3 + tmp8; | |
107 | tmpz[3].re = tmp3 - tmp8; | |
108 | tmpz[1].im = tmp4 - tmp7; | |
109 | tmpz[3].im = tmp4 + tmp7; | |
110 | ||
111 | } | |
112 | ||
113 | if (fft_size < 8) | |
114 | return; | |
115 | ||
116 | num_transforms = (num_transforms >> 1) | 1; | |
117 | ||
118 | for (n=0; n<num_transforms; n++) { | |
119 | offset = ff_fft_offsets_lut[n] << 3; | |
120 | tmpz = z + offset; | |
121 | ||
122 | __asm__ volatile ( | |
123 | "lwc1 %[tmp1], 32(%[tmpz]) \n\t" | |
124 | "lwc1 %[pom], 40(%[tmpz]) \n\t" | |
125 | "lwc1 %[tmp3], 48(%[tmpz]) \n\t" | |
126 | "lwc1 %[pom1], 56(%[tmpz]) \n\t" | |
127 | "lwc1 %[tmp2], 36(%[tmpz]) \n\t" | |
128 | "lwc1 %[pom2], 44(%[tmpz]) \n\t" | |
129 | "lwc1 %[pom3], 60(%[tmpz]) \n\t" | |
130 | "lwc1 %[tmp4], 52(%[tmpz]) \n\t" | |
131 | "add.s %[tmp1], %[tmp1], %[pom] \n\t" // tmp1 = tmpz[4].re + tmpz[5].re; | |
132 | "add.s %[tmp3], %[tmp3], %[pom1] \n\t" // tmp3 = tmpz[6].re + tmpz[7].re; | |
133 | "add.s %[tmp2], %[tmp2], %[pom2] \n\t" // tmp2 = tmpz[4].im + tmpz[5].im; | |
134 | "lwc1 %[pom], 40(%[tmpz]) \n\t" | |
135 | "add.s %[tmp4], %[tmp4], %[pom3] \n\t" // tmp4 = tmpz[6].im + tmpz[7].im; | |
136 | "add.s %[tmp5], %[tmp1], %[tmp3] \n\t" // tmp5 = tmp1 + tmp3; | |
137 | "sub.s %[tmp7], %[tmp1], %[tmp3] \n\t" // tmp7 = tmp1 - tmp3; | |
138 | "lwc1 %[tmp1], 32(%[tmpz]) \n\t" | |
139 | "lwc1 %[pom1], 44(%[tmpz]) \n\t" | |
140 | "add.s %[tmp6], %[tmp2], %[tmp4] \n\t" // tmp6 = tmp2 + tmp4; | |
141 | "sub.s %[tmp8], %[tmp2], %[tmp4] \n\t" // tmp8 = tmp2 - tmp4; | |
142 | "lwc1 %[tmp2], 36(%[tmpz]) \n\t" | |
143 | "lwc1 %[pom2], 56(%[tmpz]) \n\t" | |
144 | "lwc1 %[pom3], 60(%[tmpz]) \n\t" | |
145 | "lwc1 %[tmp3], 48(%[tmpz]) \n\t" | |
146 | "lwc1 %[tmp4], 52(%[tmpz]) \n\t" | |
147 | "sub.s %[tmp1], %[tmp1], %[pom] \n\t" // tmp1 = tmpz[4].re - tmpz[5].re; | |
148 | "lwc1 %[pom], 0(%[tmpz]) \n\t" | |
149 | "sub.s %[tmp2], %[tmp2], %[pom1] \n\t" // tmp2 = tmpz[4].im - tmpz[5].im; | |
150 | "sub.s %[tmp3], %[tmp3], %[pom2] \n\t" // tmp3 = tmpz[6].re - tmpz[7].re; | |
151 | "lwc1 %[pom2], 4(%[tmpz]) \n\t" | |
152 | "sub.s %[pom1], %[pom], %[tmp5] \n\t" | |
153 | "sub.s %[tmp4], %[tmp4], %[pom3] \n\t" // tmp4 = tmpz[6].im - tmpz[7].im; | |
154 | "add.s %[pom3], %[pom], %[tmp5] \n\t" | |
155 | "sub.s %[pom], %[pom2], %[tmp6] \n\t" | |
156 | "add.s %[pom2], %[pom2], %[tmp6] \n\t" | |
157 | "swc1 %[pom1], 32(%[tmpz]) \n\t" // tmpz[4].re = tmpz[0].re - tmp5; | |
158 | "swc1 %[pom3], 0(%[tmpz]) \n\t" // tmpz[0].re = tmpz[0].re + tmp5; | |
159 | "swc1 %[pom], 36(%[tmpz]) \n\t" // tmpz[4].im = tmpz[0].im - tmp6; | |
160 | "swc1 %[pom2], 4(%[tmpz]) \n\t" // tmpz[0].im = tmpz[0].im + tmp6; | |
161 | "lwc1 %[pom1], 16(%[tmpz]) \n\t" | |
162 | "lwc1 %[pom3], 20(%[tmpz]) \n\t" | |
163 | "li.s %[pom], 0.7071067812 \n\t" // float pom = 0.7071067812f; | |
164 | "add.s %[temp1],%[tmp1], %[tmp2] \n\t" | |
165 | "sub.s %[temp], %[pom1], %[tmp8] \n\t" | |
166 | "add.s %[pom2], %[pom3], %[tmp7] \n\t" | |
167 | "sub.s %[temp3],%[tmp3], %[tmp4] \n\t" | |
168 | "sub.s %[temp4],%[tmp2], %[tmp1] \n\t" | |
169 | "swc1 %[temp], 48(%[tmpz]) \n\t" // tmpz[6].re = tmpz[2].re - tmp8; | |
170 | "swc1 %[pom2], 52(%[tmpz]) \n\t" // tmpz[6].im = tmpz[2].im + tmp7; | |
171 | "add.s %[pom1], %[pom1], %[tmp8] \n\t" | |
172 | "sub.s %[pom3], %[pom3], %[tmp7] \n\t" | |
173 | "add.s %[tmp3], %[tmp3], %[tmp4] \n\t" | |
174 | "mul.s %[tmp5], %[pom], %[temp1] \n\t" // tmp5 = pom * (tmp1 + tmp2); | |
175 | "mul.s %[tmp7], %[pom], %[temp3] \n\t" // tmp7 = pom * (tmp3 - tmp4); | |
176 | "mul.s %[tmp6], %[pom], %[temp4] \n\t" // tmp6 = pom * (tmp2 - tmp1); | |
177 | "mul.s %[tmp8], %[pom], %[tmp3] \n\t" // tmp8 = pom * (tmp3 + tmp4); | |
178 | "swc1 %[pom1], 16(%[tmpz]) \n\t" // tmpz[2].re = tmpz[2].re + tmp8; | |
179 | "swc1 %[pom3], 20(%[tmpz]) \n\t" // tmpz[2].im = tmpz[2].im - tmp7; | |
180 | "add.s %[tmp1], %[tmp5], %[tmp7] \n\t" // tmp1 = tmp5 + tmp7; | |
181 | "sub.s %[tmp3], %[tmp5], %[tmp7] \n\t" // tmp3 = tmp5 - tmp7; | |
182 | "add.s %[tmp2], %[tmp6], %[tmp8] \n\t" // tmp2 = tmp6 + tmp8; | |
183 | "sub.s %[tmp4], %[tmp6], %[tmp8] \n\t" // tmp4 = tmp6 - tmp8; | |
184 | "lwc1 %[temp], 8(%[tmpz]) \n\t" | |
185 | "lwc1 %[temp1],12(%[tmpz]) \n\t" | |
186 | "lwc1 %[pom], 24(%[tmpz]) \n\t" | |
187 | "lwc1 %[pom2], 28(%[tmpz]) \n\t" | |
188 | "sub.s %[temp4],%[temp], %[tmp1] \n\t" | |
189 | "sub.s %[temp3],%[temp1], %[tmp2] \n\t" | |
190 | "add.s %[temp], %[temp], %[tmp1] \n\t" | |
191 | "add.s %[temp1],%[temp1], %[tmp2] \n\t" | |
192 | "sub.s %[pom1], %[pom], %[tmp4] \n\t" | |
193 | "add.s %[pom3], %[pom2], %[tmp3] \n\t" | |
194 | "add.s %[pom], %[pom], %[tmp4] \n\t" | |
195 | "sub.s %[pom2], %[pom2], %[tmp3] \n\t" | |
196 | "swc1 %[temp4],40(%[tmpz]) \n\t" // tmpz[5].re = tmpz[1].re - tmp1; | |
197 | "swc1 %[temp3],44(%[tmpz]) \n\t" // tmpz[5].im = tmpz[1].im - tmp2; | |
198 | "swc1 %[temp], 8(%[tmpz]) \n\t" // tmpz[1].re = tmpz[1].re + tmp1; | |
199 | "swc1 %[temp1],12(%[tmpz]) \n\t" // tmpz[1].im = tmpz[1].im + tmp2; | |
200 | "swc1 %[pom1], 56(%[tmpz]) \n\t" // tmpz[7].re = tmpz[3].re - tmp4; | |
201 | "swc1 %[pom3], 60(%[tmpz]) \n\t" // tmpz[7].im = tmpz[3].im + tmp3; | |
202 | "swc1 %[pom], 24(%[tmpz]) \n\t" // tmpz[3].re = tmpz[3].re + tmp4; | |
203 | "swc1 %[pom2], 28(%[tmpz]) \n\t" // tmpz[3].im = tmpz[3].im - tmp3; | |
204 | : [tmp1]"=&f"(tmp1), [pom]"=&f"(pom), [pom1]"=&f"(pom1), [pom2]"=&f"(pom2), | |
205 | [tmp3]"=&f"(tmp3), [tmp2]"=&f"(tmp2), [tmp4]"=&f"(tmp4), [tmp5]"=&f"(tmp5), [tmp7]"=&f"(tmp7), | |
206 | [tmp6]"=&f"(tmp6), [tmp8]"=&f"(tmp8), [pom3]"=&f"(pom3),[temp]"=&f"(temp), [temp1]"=&f"(temp1), | |
207 | [temp3]"=&f"(temp3), [temp4]"=&f"(temp4) | |
208 | : [tmpz]"r"(tmpz) | |
209 | : "memory" | |
210 | ); | |
211 | } | |
212 | ||
213 | step = 1 << (MAX_LOG2_NFFT - 4); | |
214 | n4 = 4; | |
215 | ||
216 | for (nbits=4; nbits<=s->nbits; nbits++) { | |
217 | /* | |
218 | * num_transforms = (num_transforms >> 1) | 1; | |
219 | */ | |
220 | __asm__ volatile ( | |
221 | "sra %[num_t], %[num_t], 1 \n\t" | |
222 | "ori %[num_t], %[num_t], 1 \n\t" | |
223 | ||
224 | : [num_t] "+r" (num_transforms) | |
225 | ); | |
226 | n2 = 2 * n4; | |
227 | n34 = 3 * n4; | |
228 | ||
229 | for (n=0; n<num_transforms; n++) { | |
230 | offset = ff_fft_offsets_lut[n] << nbits; | |
231 | tmpz = z + offset; | |
232 | ||
233 | tmpz_n2 = tmpz + n2; | |
234 | tmpz_n4 = tmpz + n4; | |
235 | tmpz_n34 = tmpz + n34; | |
236 | ||
237 | __asm__ volatile ( | |
238 | "lwc1 %[pom1], 0(%[tmpz_n2]) \n\t" | |
239 | "lwc1 %[pom], 0(%[tmpz_n34]) \n\t" | |
240 | "lwc1 %[pom2], 4(%[tmpz_n2]) \n\t" | |
241 | "lwc1 %[pom3], 4(%[tmpz_n34]) \n\t" | |
242 | "lwc1 %[temp1],0(%[tmpz]) \n\t" | |
243 | "lwc1 %[temp3],4(%[tmpz]) \n\t" | |
244 | "add.s %[tmp5], %[pom1], %[pom] \n\t" // tmp5 = tmpz[ n2].re + tmpz[n34].re; | |
245 | "sub.s %[tmp1], %[pom1], %[pom] \n\t" // tmp1 = tmpz[ n2].re - tmpz[n34].re; | |
246 | "add.s %[tmp6], %[pom2], %[pom3] \n\t" // tmp6 = tmpz[ n2].im + tmpz[n34].im; | |
247 | "sub.s %[tmp2], %[pom2], %[pom3] \n\t" // tmp2 = tmpz[ n2].im - tmpz[n34].im; | |
248 | "sub.s %[temp], %[temp1], %[tmp5] \n\t" | |
249 | "add.s %[temp1],%[temp1], %[tmp5] \n\t" | |
250 | "sub.s %[temp4],%[temp3], %[tmp6] \n\t" | |
251 | "add.s %[temp3],%[temp3], %[tmp6] \n\t" | |
252 | "swc1 %[temp], 0(%[tmpz_n2]) \n\t" // tmpz[ n2].re = tmpz[ 0].re - tmp5; | |
253 | "swc1 %[temp1],0(%[tmpz]) \n\t" // tmpz[ 0].re = tmpz[ 0].re + tmp5; | |
254 | "lwc1 %[pom1], 0(%[tmpz_n4]) \n\t" | |
255 | "swc1 %[temp4],4(%[tmpz_n2]) \n\t" // tmpz[ n2].im = tmpz[ 0].im - tmp6; | |
256 | "lwc1 %[temp], 4(%[tmpz_n4]) \n\t" | |
257 | "swc1 %[temp3],4(%[tmpz]) \n\t" // tmpz[ 0].im = tmpz[ 0].im + tmp6; | |
258 | "sub.s %[pom], %[pom1], %[tmp2] \n\t" | |
259 | "add.s %[pom1], %[pom1], %[tmp2] \n\t" | |
260 | "add.s %[temp1],%[temp], %[tmp1] \n\t" | |
261 | "sub.s %[temp], %[temp], %[tmp1] \n\t" | |
262 | "swc1 %[pom], 0(%[tmpz_n34]) \n\t" // tmpz[n34].re = tmpz[n4].re - tmp2; | |
263 | "swc1 %[pom1], 0(%[tmpz_n4]) \n\t" // tmpz[ n4].re = tmpz[n4].re + tmp2; | |
264 | "swc1 %[temp1],4(%[tmpz_n34]) \n\t" // tmpz[n34].im = tmpz[n4].im + tmp1; | |
265 | "swc1 %[temp], 4(%[tmpz_n4]) \n\t" // tmpz[ n4].im = tmpz[n4].im - tmp1; | |
266 | : [tmp5]"=&f"(tmp5), | |
267 | [tmp1]"=&f"(tmp1), [pom]"=&f"(pom), [pom1]"=&f"(pom1), [pom2]"=&f"(pom2), | |
268 | [tmp2]"=&f"(tmp2), [tmp6]"=&f"(tmp6), [pom3]"=&f"(pom3), | |
269 | [temp]"=&f"(temp), [temp1]"=&f"(temp1), [temp3]"=&f"(temp3), [temp4]"=&f"(temp4) | |
270 | : [tmpz]"r"(tmpz), [tmpz_n2]"r"(tmpz_n2), [tmpz_n34]"r"(tmpz_n34), [tmpz_n4]"r"(tmpz_n4) | |
271 | : "memory" | |
272 | ); | |
273 | ||
274 | w_re_ptr = (float*)(ff_cos_65536 + step); | |
275 | w_im_ptr = (float*)(ff_cos_65536 + MAX_FFT_SIZE/4 - step); | |
276 | ||
277 | for (i=1; i<n4; i++) { | |
278 | w_re = w_re_ptr[0]; | |
279 | w_im = w_im_ptr[0]; | |
280 | tmpz_n2_i = tmpz_n2 + i; | |
281 | tmpz_n4_i = tmpz_n4 + i; | |
282 | tmpz_n34_i= tmpz_n34 + i; | |
283 | tmpz_i = tmpz + i; | |
284 | ||
285 | __asm__ volatile ( | |
286 | "lwc1 %[temp], 0(%[tmpz_n2_i]) \n\t" | |
287 | "lwc1 %[temp1], 4(%[tmpz_n2_i]) \n\t" | |
288 | "lwc1 %[pom], 0(%[tmpz_n34_i]) \n\t" | |
289 | "lwc1 %[pom1], 4(%[tmpz_n34_i]) \n\t" | |
290 | "mul.s %[temp3], %[w_im], %[temp] \n\t" | |
291 | "mul.s %[temp4], %[w_im], %[temp1] \n\t" | |
292 | "mul.s %[pom2], %[w_im], %[pom1] \n\t" | |
293 | "mul.s %[pom3], %[w_im], %[pom] \n\t" | |
294 | "msub.s %[tmp2], %[temp3], %[w_re], %[temp1] \n\t" // tmp2 = w_re * tmpz[ n2+i].im - w_im * tmpz[ n2+i].re; | |
295 | "madd.s %[tmp1], %[temp4], %[w_re], %[temp] \n\t" // tmp1 = w_re * tmpz[ n2+i].re + w_im * tmpz[ n2+i].im; | |
296 | "msub.s %[tmp3], %[pom2], %[w_re], %[pom] \n\t" // tmp3 = w_re * tmpz[n34+i].re - w_im * tmpz[n34+i].im; | |
297 | "madd.s %[tmp4], %[pom3], %[w_re], %[pom1] \n\t" // tmp4 = w_re * tmpz[n34+i].im + w_im * tmpz[n34+i].re; | |
298 | "lwc1 %[temp], 0(%[tmpz_i]) \n\t" | |
299 | "lwc1 %[pom], 4(%[tmpz_i]) \n\t" | |
300 | "add.s %[tmp5], %[tmp1], %[tmp3] \n\t" // tmp5 = tmp1 + tmp3; | |
301 | "sub.s %[tmp1], %[tmp1], %[tmp3] \n\t" // tmp1 = tmp1 - tmp3; | |
302 | "add.s %[tmp6], %[tmp2], %[tmp4] \n\t" // tmp6 = tmp2 + tmp4; | |
303 | "sub.s %[tmp2], %[tmp2], %[tmp4] \n\t" // tmp2 = tmp2 - tmp4; | |
304 | "sub.s %[temp1], %[temp], %[tmp5] \n\t" | |
305 | "add.s %[temp], %[temp], %[tmp5] \n\t" | |
306 | "sub.s %[pom1], %[pom], %[tmp6] \n\t" | |
307 | "add.s %[pom], %[pom], %[tmp6] \n\t" | |
308 | "lwc1 %[temp3], 0(%[tmpz_n4_i]) \n\t" | |
309 | "lwc1 %[pom2], 4(%[tmpz_n4_i]) \n\t" | |
310 | "swc1 %[temp1], 0(%[tmpz_n2_i]) \n\t" // tmpz[ n2+i].re = tmpz[ i].re - tmp5; | |
311 | "swc1 %[temp], 0(%[tmpz_i]) \n\t" // tmpz[ i].re = tmpz[ i].re + tmp5; | |
312 | "swc1 %[pom1], 4(%[tmpz_n2_i]) \n\t" // tmpz[ n2+i].im = tmpz[ i].im - tmp6; | |
313 | "swc1 %[pom] , 4(%[tmpz_i]) \n\t" // tmpz[ i].im = tmpz[ i].im + tmp6; | |
314 | "sub.s %[temp4], %[temp3], %[tmp2] \n\t" | |
315 | "add.s %[pom3], %[pom2], %[tmp1] \n\t" | |
316 | "add.s %[temp3], %[temp3], %[tmp2] \n\t" | |
317 | "sub.s %[pom2], %[pom2], %[tmp1] \n\t" | |
318 | "swc1 %[temp4], 0(%[tmpz_n34_i]) \n\t" // tmpz[n34+i].re = tmpz[n4+i].re - tmp2; | |
319 | "swc1 %[pom3], 4(%[tmpz_n34_i]) \n\t" // tmpz[n34+i].im = tmpz[n4+i].im + tmp1; | |
320 | "swc1 %[temp3], 0(%[tmpz_n4_i]) \n\t" // tmpz[ n4+i].re = tmpz[n4+i].re + tmp2; | |
321 | "swc1 %[pom2], 4(%[tmpz_n4_i]) \n\t" // tmpz[ n4+i].im = tmpz[n4+i].im - tmp1; | |
322 | : [tmp1]"=&f"(tmp1), [tmp2]"=&f" (tmp2), [temp]"=&f"(temp), [tmp3]"=&f"(tmp3), | |
323 | [tmp4]"=&f"(tmp4), [tmp5]"=&f"(tmp5), [tmp6]"=&f"(tmp6), | |
324 | [temp1]"=&f"(temp1), [temp3]"=&f"(temp3), [temp4]"=&f"(temp4), | |
325 | [pom]"=&f"(pom), [pom1]"=&f"(pom1), [pom2]"=&f"(pom2), [pom3]"=&f"(pom3) | |
326 | : [w_re]"f"(w_re), [w_im]"f"(w_im), | |
327 | [tmpz_i]"r"(tmpz_i),[tmpz_n2_i]"r"(tmpz_n2_i), | |
328 | [tmpz_n34_i]"r"(tmpz_n34_i), [tmpz_n4_i]"r"(tmpz_n4_i) | |
329 | : "memory" | |
330 | ); | |
331 | w_re_ptr += step; | |
332 | w_im_ptr -= step; | |
333 | } | |
334 | } | |
335 | step >>= 1; | |
336 | n4 <<= 1; | |
337 | } | |
338 | } | |
339 | ||
340 | /** | |
341 | * MDCT/IMDCT transforms. | |
342 | */ | |
343 | ||
344 | static void ff_imdct_half_mips(FFTContext *s, FFTSample *output, const FFTSample *input) | |
345 | { | |
346 | int k, n8, n4, n2, n, j; | |
347 | const uint16_t *revtab = s->revtab; | |
348 | const FFTSample *tcos = s->tcos; | |
349 | const FFTSample *tsin = s->tsin; | |
350 | const FFTSample *in1, *in2, *in3, *in4; | |
351 | FFTComplex *z = (FFTComplex *)output; | |
352 | ||
353 | int j1; | |
354 | const float *tcos1, *tsin1, *tcos2, *tsin2; | |
355 | float temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8, | |
356 | temp9, temp10, temp11, temp12, temp13, temp14, temp15, temp16; | |
357 | FFTComplex *z1, *z2; | |
358 | ||
359 | n = 1 << s->mdct_bits; | |
360 | n2 = n >> 1; | |
361 | n4 = n >> 2; | |
362 | n8 = n >> 3; | |
363 | ||
364 | /* pre rotation */ | |
365 | in1 = input; | |
366 | in2 = input + n2 - 1; | |
367 | in3 = input + 2; | |
368 | in4 = input + n2 - 3; | |
369 | ||
370 | tcos1 = tcos; | |
371 | tsin1 = tsin; | |
372 | ||
373 | /* n4 = 64 or 128 */ | |
374 | for(k = 0; k < n4; k += 2) { | |
375 | j = revtab[k ]; | |
376 | j1 = revtab[k + 1]; | |
377 | ||
378 | __asm__ volatile ( | |
379 | "lwc1 %[temp1], 0(%[in2]) \t\n" | |
380 | "lwc1 %[temp2], 0(%[tcos1]) \t\n" | |
381 | "lwc1 %[temp3], 0(%[tsin1]) \t\n" | |
382 | "lwc1 %[temp4], 0(%[in1]) \t\n" | |
383 | "lwc1 %[temp5], 0(%[in4]) \t\n" | |
384 | "mul.s %[temp9], %[temp1], %[temp2] \t\n" | |
385 | "mul.s %[temp10], %[temp1], %[temp3] \t\n" | |
386 | "lwc1 %[temp6], 4(%[tcos1]) \t\n" | |
387 | "lwc1 %[temp7], 4(%[tsin1]) \t\n" | |
388 | "nmsub.s %[temp9], %[temp9], %[temp4], %[temp3] \t\n" | |
389 | "madd.s %[temp10], %[temp10], %[temp4], %[temp2] \t\n" | |
390 | "mul.s %[temp11], %[temp5], %[temp6] \t\n" | |
391 | "mul.s %[temp12], %[temp5], %[temp7] \t\n" | |
392 | "lwc1 %[temp8], 0(%[in3]) \t\n" | |
393 | "addiu %[tcos1], %[tcos1], 8 \t\n" | |
394 | "addiu %[tsin1], %[tsin1], 8 \t\n" | |
395 | "addiu %[in1], %[in1], 16 \t\n" | |
396 | "nmsub.s %[temp11], %[temp11], %[temp8], %[temp7] \t\n" | |
397 | "madd.s %[temp12], %[temp12], %[temp8], %[temp6] \t\n" | |
398 | "addiu %[in2], %[in2], -16 \t\n" | |
399 | "addiu %[in3], %[in3], 16 \t\n" | |
400 | "addiu %[in4], %[in4], -16 \t\n" | |
401 | ||
402 | : [temp1]"=&f"(temp1), [temp2]"=&f"(temp2), | |
403 | [temp3]"=&f"(temp3), [temp4]"=&f"(temp4), | |
404 | [temp5]"=&f"(temp5), [temp6]"=&f"(temp6), | |
405 | [temp7]"=&f"(temp7), [temp8]"=&f"(temp8), | |
406 | [temp9]"=&f"(temp9), [temp10]"=&f"(temp10), | |
407 | [temp11]"=&f"(temp11), [temp12]"=&f"(temp12), | |
408 | [tsin1]"+r"(tsin1), [tcos1]"+r"(tcos1), | |
409 | [in1]"+r"(in1), [in2]"+r"(in2), | |
410 | [in3]"+r"(in3), [in4]"+r"(in4) | |
411 | : | |
412 | : "memory" | |
413 | ); | |
414 | ||
415 | z[j ].re = temp9; | |
416 | z[j ].im = temp10; | |
417 | z[j1].re = temp11; | |
418 | z[j1].im = temp12; | |
419 | } | |
420 | ||
421 | s->fft_calc(s, z); | |
422 | ||
423 | /* post rotation + reordering */ | |
424 | /* n8 = 32 or 64 */ | |
425 | for(k = 0; k < n8; k += 2) { | |
426 | tcos1 = &tcos[n8 - k - 2]; | |
427 | tsin1 = &tsin[n8 - k - 2]; | |
428 | tcos2 = &tcos[n8 + k]; | |
429 | tsin2 = &tsin[n8 + k]; | |
430 | z1 = &z[n8 - k - 2]; | |
431 | z2 = &z[n8 + k ]; | |
432 | ||
433 | __asm__ volatile ( | |
434 | "lwc1 %[temp1], 12(%[z1]) \t\n" | |
435 | "lwc1 %[temp2], 4(%[tsin1]) \t\n" | |
436 | "lwc1 %[temp3], 4(%[tcos1]) \t\n" | |
437 | "lwc1 %[temp4], 8(%[z1]) \t\n" | |
438 | "lwc1 %[temp5], 4(%[z1]) \t\n" | |
439 | "mul.s %[temp9], %[temp1], %[temp2] \t\n" | |
440 | "mul.s %[temp10], %[temp1], %[temp3] \t\n" | |
441 | "lwc1 %[temp6], 0(%[tsin1]) \t\n" | |
442 | "lwc1 %[temp7], 0(%[tcos1]) \t\n" | |
443 | "nmsub.s %[temp9], %[temp9], %[temp4], %[temp3] \t\n" | |
444 | "madd.s %[temp10], %[temp10], %[temp4], %[temp2] \t\n" | |
445 | "mul.s %[temp11], %[temp5], %[temp6] \t\n" | |
446 | "mul.s %[temp12], %[temp5], %[temp7] \t\n" | |
447 | "lwc1 %[temp8], 0(%[z1]) \t\n" | |
448 | "lwc1 %[temp1], 4(%[z2]) \t\n" | |
449 | "lwc1 %[temp2], 0(%[tsin2]) \t\n" | |
450 | "lwc1 %[temp3], 0(%[tcos2]) \t\n" | |
451 | "nmsub.s %[temp11], %[temp11], %[temp8], %[temp7] \t\n" | |
452 | "madd.s %[temp12], %[temp12], %[temp8], %[temp6] \t\n" | |
453 | "mul.s %[temp13], %[temp1], %[temp2] \t\n" | |
454 | "mul.s %[temp14], %[temp1], %[temp3] \t\n" | |
455 | "lwc1 %[temp4], 0(%[z2]) \t\n" | |
456 | "lwc1 %[temp5], 12(%[z2]) \t\n" | |
457 | "lwc1 %[temp6], 4(%[tsin2]) \t\n" | |
458 | "lwc1 %[temp7], 4(%[tcos2]) \t\n" | |
459 | "nmsub.s %[temp13], %[temp13], %[temp4], %[temp3] \t\n" | |
460 | "madd.s %[temp14], %[temp14], %[temp4], %[temp2] \t\n" | |
461 | "mul.s %[temp15], %[temp5], %[temp6] \t\n" | |
462 | "mul.s %[temp16], %[temp5], %[temp7] \t\n" | |
463 | "lwc1 %[temp8], 8(%[z2]) \t\n" | |
464 | "nmsub.s %[temp15], %[temp15], %[temp8], %[temp7] \t\n" | |
465 | "madd.s %[temp16], %[temp16], %[temp8], %[temp6] \t\n" | |
466 | : [temp1]"=&f"(temp1), [temp2]"=&f"(temp2), | |
467 | [temp3]"=&f"(temp3), [temp4]"=&f"(temp4), | |
468 | [temp5]"=&f"(temp5), [temp6]"=&f"(temp6), | |
469 | [temp7]"=&f"(temp7), [temp8]"=&f"(temp8), | |
470 | [temp9]"=&f"(temp9), [temp10]"=&f"(temp10), | |
471 | [temp11]"=&f"(temp11), [temp12]"=&f"(temp12), | |
472 | [temp13]"=&f"(temp13), [temp14]"=&f"(temp14), | |
473 | [temp15]"=&f"(temp15), [temp16]"=&f"(temp16) | |
474 | : [z1]"r"(z1), [z2]"r"(z2), | |
475 | [tsin1]"r"(tsin1), [tcos1]"r"(tcos1), | |
476 | [tsin2]"r"(tsin2), [tcos2]"r"(tcos2) | |
477 | : "memory" | |
478 | ); | |
479 | ||
480 | z1[1].re = temp9; | |
481 | z1[1].im = temp14; | |
482 | z2[0].re = temp13; | |
483 | z2[0].im = temp10; | |
484 | ||
485 | z1[0].re = temp11; | |
486 | z1[0].im = temp16; | |
487 | z2[1].re = temp15; | |
488 | z2[1].im = temp12; | |
489 | } | |
490 | } | |
491 | ||
492 | /** | |
493 | * Compute inverse MDCT of size N = 2^nbits | |
494 | * @param output N samples | |
495 | * @param input N/2 samples | |
496 | */ | |
497 | static void ff_imdct_calc_mips(FFTContext *s, FFTSample *output, const FFTSample *input) | |
498 | { | |
499 | int k; | |
500 | int n = 1 << s->mdct_bits; | |
501 | int n2 = n >> 1; | |
502 | int n4 = n >> 2; | |
503 | ||
504 | ff_imdct_half_mips(s, output+n4, input); | |
505 | ||
506 | for(k = 0; k < n4; k+=4) { | |
507 | output[k] = -output[n2-k-1]; | |
508 | output[k+1] = -output[n2-k-2]; | |
509 | output[k+2] = -output[n2-k-3]; | |
510 | output[k+3] = -output[n2-k-4]; | |
511 | ||
512 | output[n-k-1] = output[n2+k]; | |
513 | output[n-k-2] = output[n2+k+1]; | |
514 | output[n-k-3] = output[n2+k+2]; | |
515 | output[n-k-4] = output[n2+k+3]; | |
516 | } | |
517 | } | |
518 | #endif /* HAVE_INLINE_ASM */ | |
519 | ||
520 | av_cold void ff_fft_init_mips(FFTContext *s) | |
521 | { | |
522 | int n=0; | |
523 | ||
524 | ff_fft_lut_init(ff_fft_offsets_lut, 0, 1 << 16, &n); | |
525 | ff_init_ff_cos_tabs(16); | |
526 | ||
527 | #if HAVE_INLINE_ASM | |
528 | s->fft_calc = ff_fft_calc_mips; | |
529 | #if CONFIG_MDCT | |
530 | s->imdct_calc = ff_imdct_calc_mips; | |
531 | s->imdct_half = ff_imdct_half_mips; | |
532 | #endif | |
533 | #endif | |
534 | } |