a85475d160bf14e1344ebbc97efdede7d10e96a0
[deb_ffmpeg.git] / fft_vsx.h
1 #ifndef AVCODEC_PPC_FFT_VSX_H
2 #define AVCODEC_PPC_FFT_VSX_H
3 /*
4 * FFT transform, optimized with VSX built-in functions
5 * Copyright (c) 2014 Rong Yan Copyright (c) 2009 Loren Merritt
6 *
7 * This algorithm (though not any of the implementation details) is
8 * based on libdjbfft by D. J. Bernstein, and fft_altivec_s.S.
9 *
10 * This file is part of FFmpeg.
11 *
12 * FFmpeg is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU Lesser General Public
14 * License as published by the Free Software Foundation; either
15 * version 2.1 of the License, or (at your option) any later version.
16 *
17 * FFmpeg is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * Lesser General Public License for more details.
21 *
22 * You should have received a copy of the GNU Lesser General Public
23 * License along with FFmpeg; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 */
26
27
28 #include "config.h"
29 #include "libavutil/cpu.h"
30 #include "libavutil/ppc/types_altivec.h"
31 #include "libavutil/ppc/util_altivec.h"
32 #include "libavcodec/fft.h"
33 #include "libavcodec/fft-internal.h"
34
35 #if HAVE_VSX
36
37 void ff_fft_calc_interleave_vsx(FFTContext *s, FFTComplex *z);
38 void ff_fft_calc_vsx(FFTContext *s, FFTComplex *z);
39
40
41 #define byte_2complex (2*sizeof(FFTComplex))
42 #define byte_4complex (4*sizeof(FFTComplex))
43 #define byte_6complex (6*sizeof(FFTComplex))
44 #define byte_8complex (8*sizeof(FFTComplex))
45 #define byte_10complex (10*sizeof(FFTComplex))
46 #define byte_12complex (12*sizeof(FFTComplex))
47 #define byte_14complex (14*sizeof(FFTComplex))
48
49 inline static void pass_vsx_interleave(FFTComplex *z, const FFTSample *wre, unsigned int n)
50 {
51 int o1 = n<<1;
52 int o2 = n<<2;
53 int o3 = o1+o2;
54 int i1, i2, i3;
55 FFTSample* out = (FFTSample*)z;
56 const FFTSample *wim = wre+o1;
57 vec_f vz0, vzo1, vzo2, vzo3;
58 vec_f x0, x1, x2, x3;
59 vec_f x4, x5, x6, x7;
60 vec_f x8, x9, x10, x11;
61 vec_f x12, x13, x14, x15;
62 vec_f x16, x17, x18, x19;
63 vec_f x20, x21, x22, x23;
64 vec_f vz0plus1, vzo1plus1, vzo2plus1, vzo3plus1;
65 vec_f y0, y1, y2, y3;
66 vec_f y4, y5, y8, y9;
67 vec_f y10, y13, y14, y15;
68 vec_f y16, y17, y18, y19;
69 vec_f y20, y21, y22, y23;
70 vec_f wr1, wi1, wr0, wi0;
71 vec_f wr2, wi2, wr3, wi3;
72 vec_f xmulwi0, xmulwi1, ymulwi2, ymulwi3;
73
74 n = n-2;
75 i1 = o1*sizeof(FFTComplex);
76 i2 = o2*sizeof(FFTComplex);
77 i3 = o3*sizeof(FFTComplex);
78 vzo2 = vec_ld(i2, &(out[0])); // zo2.r zo2.i z(o2+1).r z(o2+1).i
79 vzo2plus1 = vec_ld(i2+16, &(out[0]));
80 vzo3 = vec_ld(i3, &(out[0])); // zo3.r zo3.i z(o3+1).r z(o3+1).i
81 vzo3plus1 = vec_ld(i3+16, &(out[0]));
82 vz0 = vec_ld(0, &(out[0])); // z0.r z0.i z1.r z1.i
83 vz0plus1 = vec_ld(16, &(out[0]));
84 vzo1 = vec_ld(i1, &(out[0])); // zo1.r zo1.i z(o1+1).r z(o1+1).i
85 vzo1plus1 = vec_ld(i1+16, &(out[0]));
86
87 x0 = vec_add(vzo2, vzo3);
88 x1 = vec_sub(vzo2, vzo3);
89 y0 = vec_add(vzo2plus1, vzo3plus1);
90 y1 = vec_sub(vzo2plus1, vzo3plus1);
91
92 wr1 = vec_splats(wre[1]);
93 wi1 = vec_splats(wim[-1]);
94 wi2 = vec_splats(wim[-2]);
95 wi3 = vec_splats(wim[-3]);
96 wr2 = vec_splats(wre[2]);
97 wr3 = vec_splats(wre[3]);
98
99 x2 = vec_perm(x0, x1, vcprm(2,s2,3,s3));
100 x3 = vec_perm(x0, x1, vcprm(s3,3,s2,2));
101
102 y4 = vec_perm(y0, y1, vcprm(s1,1,s0,0));
103 y5 = vec_perm(y0, y1, vcprm(s3,3,s2,2));
104 y2 = vec_perm(y0, y1, vcprm(0,s0,1,s1));
105 y3 = vec_perm(y0, y1, vcprm(2,s2,3,s3));
106
107 ymulwi2 = vec_mul(y4, wi2);
108 ymulwi3 = vec_mul(y5, wi3);
109 x4 = vec_mul(x2, wr1);
110 x5 = vec_mul(x3, wi1);
111 y8 = vec_madd(y2, wr2, ymulwi2);
112 y9 = vec_msub(y2, wr2, ymulwi2);
113 x6 = vec_add(x4, x5);
114 x7 = vec_sub(x4, x5);
115 y13 = vec_madd(y3, wr3, ymulwi3);
116 y14 = vec_msub(y3, wr3, ymulwi3);
117
118 x8 = vec_perm(x6, x7, vcprm(0,1,s2,s3));
119 y10 = vec_perm(y8, y9, vcprm(0,1,s2,s3));
120 y15 = vec_perm(y13, y14, vcprm(0,1,s2,s3));
121
122 x9 = vec_perm(x0, x8, vcprm(0,1,s0,s2));
123 x10 = vec_perm(x1, x8, vcprm(1,0,s3,s1));
124
125 y16 = vec_perm(y10, y15, vcprm(0,2,s0,s2));
126 y17 = vec_perm(y10, y15, vcprm(3,1,s3,s1));
127
128 x11 = vec_add(vz0, x9);
129 x12 = vec_sub(vz0, x9);
130 x13 = vec_add(vzo1, x10);
131 x14 = vec_sub(vzo1, x10);
132
133 y18 = vec_add(vz0plus1, y16);
134 y19 = vec_sub(vz0plus1, y16);
135 y20 = vec_add(vzo1plus1, y17);
136 y21 = vec_sub(vzo1plus1, y17);
137
138 x15 = vec_perm(x13, x14, vcprm(0,s1,2,s3));
139 x16 = vec_perm(x13, x14, vcprm(s0,1,s2,3));
140 y22 = vec_perm(y20, y21, vcprm(0,s1,2,s3));
141 y23 = vec_perm(y20, y21, vcprm(s0,1,s2,3));
142
143
144 vec_st(x11, 0, &(out[0]));
145 vec_st(y18, 16, &(out[0]));
146 vec_st(x15, i1, &(out[0]));
147 vec_st(y22, i1+16, &(out[0]));
148 vec_st(x12, i2, &(out[0]));
149 vec_st(y19, i2+16, &(out[0]));
150 vec_st(x16, i3, &(out[0]));
151 vec_st(y23, i3+16, &(out[0]));
152
153 do {
154 out += 8;
155 wre += 4;
156 wim -= 4;
157 wr0 = vec_splats(wre[0]);
158 wr1 = vec_splats(wre[1]);
159 wi0 = vec_splats(wim[0]);
160 wi1 = vec_splats(wim[-1]);
161
162 wr2 = vec_splats(wre[2]);
163 wr3 = vec_splats(wre[3]);
164 wi2 = vec_splats(wim[-2]);
165 wi3 = vec_splats(wim[-3]);
166
167 vzo2 = vec_ld(i2, &(out[0])); // zo2.r zo2.i z(o2+1).r z(o2+1).i
168 vzo2plus1 = vec_ld(i2+16, &(out[0]));
169 vzo3 = vec_ld(i3, &(out[0])); // zo3.r zo3.i z(o3+1).r z(o3+1).i
170 vzo3plus1 = vec_ld(i3+16, &(out[0]));
171 vz0 = vec_ld(0, &(out[0])); // z0.r z0.i z1.r z1.i
172 vz0plus1 = vec_ld(16, &(out[0]));
173 vzo1 = vec_ld(i1, &(out[0])); // zo1.r zo1.i z(o1+1).r z(o1+1).i
174 vzo1plus1 = vec_ld(i1+16, &(out[0]));
175
176 x0 = vec_add(vzo2, vzo3);
177 x1 = vec_sub(vzo2, vzo3);
178
179 y0 = vec_add(vzo2plus1, vzo3plus1);
180 y1 = vec_sub(vzo2plus1, vzo3plus1);
181
182 x4 = vec_perm(x0, x1, vcprm(s1,1,s0,0));
183 x5 = vec_perm(x0, x1, vcprm(s3,3,s2,2));
184 x2 = vec_perm(x0, x1, vcprm(0,s0,1,s1));
185 x3 = vec_perm(x0, x1, vcprm(2,s2,3,s3));
186
187 y2 = vec_perm(y0, y1, vcprm(0,s0,1,s1));
188 y3 = vec_perm(y0, y1, vcprm(2,s2,3,s3));
189 xmulwi0 = vec_mul(x4, wi0);
190 xmulwi1 = vec_mul(x5, wi1);
191
192 y4 = vec_perm(y0, y1, vcprm(s1,1,s0,0));
193 y5 = vec_perm(y0, y1, vcprm(s3,3,s2,2));
194
195 x8 = vec_madd(x2, wr0, xmulwi0);
196 x9 = vec_msub(x2, wr0, xmulwi0);
197 ymulwi2 = vec_mul(y4, wi2);
198 ymulwi3 = vec_mul(y5, wi3);
199
200 x13 = vec_madd(x3, wr1, xmulwi1);
201 x14 = vec_msub(x3, wr1, xmulwi1);
202
203 y8 = vec_madd(y2, wr2, ymulwi2);
204 y9 = vec_msub(y2, wr2, ymulwi2);
205 y13 = vec_madd(y3, wr3, ymulwi3);
206 y14 = vec_msub(y3, wr3, ymulwi3);
207
208 x10 = vec_perm(x8, x9, vcprm(0,1,s2,s3));
209 x15 = vec_perm(x13, x14, vcprm(0,1,s2,s3));
210
211 y10 = vec_perm(y8, y9, vcprm(0,1,s2,s3));
212 y15 = vec_perm(y13, y14, vcprm(0,1,s2,s3));
213
214 x16 = vec_perm(x10, x15, vcprm(0,2,s0,s2));
215 x17 = vec_perm(x10, x15, vcprm(3,1,s3,s1));
216
217 y16 = vec_perm(y10, y15, vcprm(0,2,s0,s2));
218 y17 = vec_perm(y10, y15, vcprm(3,1,s3,s1));
219
220 x18 = vec_add(vz0, x16);
221 x19 = vec_sub(vz0, x16);
222 x20 = vec_add(vzo1, x17);
223 x21 = vec_sub(vzo1, x17);
224
225 y18 = vec_add(vz0plus1, y16);
226 y19 = vec_sub(vz0plus1, y16);
227 y20 = vec_add(vzo1plus1, y17);
228 y21 = vec_sub(vzo1plus1, y17);
229
230 x22 = vec_perm(x20, x21, vcprm(0,s1,2,s3));
231 x23 = vec_perm(x20, x21, vcprm(s0,1,s2,3));
232
233 y22 = vec_perm(y20, y21, vcprm(0,s1,2,s3));
234 y23 = vec_perm(y20, y21, vcprm(s0,1,s2,3));
235
236 vec_st(x18, 0, &(out[0]));
237 vec_st(y18, 16, &(out[0]));
238 vec_st(x22, i1, &(out[0]));
239 vec_st(y22, i1+16, &(out[0]));
240 vec_st(x19, i2, &(out[0]));
241 vec_st(y19, i2+16, &(out[0]));
242 vec_st(x23, i3, &(out[0]));
243 vec_st(y23, i3+16, &(out[0]));
244 } while (n-=2);
245 }
246
247 inline static void fft2_vsx_interleave(FFTComplex *z)
248 {
249 FFTSample r1, i1;
250
251 r1 = z[0].re - z[1].re;
252 z[0].re += z[1].re;
253 z[1].re = r1;
254
255 i1 = z[0].im - z[1].im;
256 z[0].im += z[1].im;
257 z[1].im = i1;
258 }
259
260 inline static void fft4_vsx_interleave(FFTComplex *z)
261 {
262 vec_f a, b, c, d;
263 float* out= (float*)z;
264 a = vec_ld(0, &(out[0]));
265 b = vec_ld(byte_2complex, &(out[0]));
266
267 c = vec_perm(a, b, vcprm(0,1,s2,s1));
268 d = vec_perm(a, b, vcprm(2,3,s0,s3));
269 a = vec_add(c, d);
270 b = vec_sub(c, d);
271
272 c = vec_perm(a, b, vcprm(0,1,s0,s1));
273 d = vec_perm(a, b, vcprm(2,3,s3,s2));
274
275 a = vec_add(c, d);
276 b = vec_sub(c, d);
277 vec_st(a, 0, &(out[0]));
278 vec_st(b, byte_2complex, &(out[0]));
279 }
280
281 inline static void fft8_vsx_interleave(FFTComplex *z)
282 {
283 vec_f vz0, vz1, vz2, vz3;
284 vec_f x0, x1, x2, x3;
285 vec_f x4, x5, x6, x7;
286 vec_f x8, x9, x10, x11;
287 vec_f x12, x13, x14, x15;
288 vec_f x16, x17, x18, x19;
289 vec_f x20, x21, x22, x23;
290 vec_f x24, x25, x26, x27;
291 vec_f x28, x29, x30, x31;
292 vec_f x32, x33, x34;
293
294 float* out= (float*)z;
295 vec_f vc1 = {sqrthalf, sqrthalf, sqrthalf, sqrthalf};
296
297 vz0 = vec_ld(0, &(out[0]));
298 vz1 = vec_ld(byte_2complex, &(out[0]));
299 vz2 = vec_ld(byte_4complex, &(out[0]));
300 vz3 = vec_ld(byte_6complex, &(out[0]));
301
302 x0 = vec_perm(vz0, vz1, vcprm(0,1,s2,s1));
303 x1 = vec_perm(vz0, vz1, vcprm(2,3,s0,s3));
304 x2 = vec_perm(vz2, vz3, vcprm(2,1,s0,s1));
305 x3 = vec_perm(vz2, vz3, vcprm(0,3,s2,s3));
306
307 x4 = vec_add(x0, x1);
308 x5 = vec_sub(x0, x1);
309 x6 = vec_add(x2, x3);
310 x7 = vec_sub(x2, x3);
311
312 x8 = vec_perm(x4, x5, vcprm(0,1,s0,s1));
313 x9 = vec_perm(x4, x5, vcprm(2,3,s3,s2));
314 x10 = vec_perm(x6, x7, vcprm(2,1,s2,s1));
315 x11 = vec_perm(x6, x7, vcprm(0,3,s0,s3));
316
317 x12 = vec_add(x8, x9);
318 x13 = vec_sub(x8, x9);
319 x14 = vec_add(x10, x11);
320 x15 = vec_sub(x10, x11);
321 x16 = vec_perm(x12, x13, vcprm(0,s0,1,s1));
322 x17 = vec_perm(x14, x15, vcprm(0,s0,1,s1));
323 x18 = vec_perm(x16, x17, vcprm(s0,s3,s2,s1));
324 x19 = vec_add(x16, x18); // z0.r z2.r z0.i z2.i
325 x20 = vec_sub(x16, x18); // z4.r z6.r z4.i z6.i
326
327 x21 = vec_perm(x12, x13, vcprm(2,s2,3,s3));
328 x22 = vec_perm(x14, x15, vcprm(2,3,s2,s3));
329 x23 = vec_perm(x14, x15, vcprm(3,2,s3,s2));
330 x24 = vec_add(x22, x23);
331 x25 = vec_sub(x22, x23);
332 x26 = vec_mul( vec_perm(x24, x25, vcprm(2,s2,0,s0)), vc1);
333
334 x27 = vec_add(x21, x26); // z1.r z7.r z1.i z3.i
335 x28 = vec_sub(x21, x26); //z5.r z3.r z5.i z7.i
336
337 x29 = vec_perm(x19, x27, vcprm(0,2,s0,s2)); // z0.r z0.i z1.r z1.i
338 x30 = vec_perm(x19, x27, vcprm(1,3,s1,s3)); // z2.r z2.i z7.r z3.i
339 x31 = vec_perm(x20, x28, vcprm(0,2,s0,s2)); // z4.r z4.i z5.r z5.i
340 x32 = vec_perm(x20, x28, vcprm(1,3,s1,s3)); // z6.r z6.i z3.r z7.i
341 x33 = vec_perm(x30, x32, vcprm(0,1,s2,3)); // z2.r z2.i z3.r z3.i
342 x34 = vec_perm(x30, x32, vcprm(s0,s1,2,s3)); // z6.r z6.i z7.r z7.i
343
344 vec_st(x29, 0, &(out[0]));
345 vec_st(x33, byte_2complex, &(out[0]));
346 vec_st(x31, byte_4complex, &(out[0]));
347 vec_st(x34, byte_6complex, &(out[0]));
348 }
349
350 inline static void fft16_vsx_interleave(FFTComplex *z)
351 {
352 float* out= (float*)z;
353 vec_f vc0 = {sqrthalf, sqrthalf, sqrthalf, sqrthalf};
354 vec_f vc1 = {ff_cos_16[1], ff_cos_16[1], ff_cos_16[1], ff_cos_16[1]};
355 vec_f vc2 = {ff_cos_16[3], ff_cos_16[3], ff_cos_16[3], ff_cos_16[3]};
356 vec_f vz0, vz1, vz2, vz3;
357 vec_f vz4, vz5, vz6, vz7;
358 vec_f x0, x1, x2, x3;
359 vec_f x4, x5, x6, x7;
360 vec_f x8, x9, x10, x11;
361 vec_f x12, x13, x14, x15;
362 vec_f x16, x17, x18, x19;
363 vec_f x20, x21, x22, x23;
364 vec_f x24, x25, x26, x27;
365 vec_f x28, x29, x30, x31;
366 vec_f x32, x33, x34, x35;
367 vec_f x36, x37, x38, x39;
368 vec_f x40, x41, x42, x43;
369 vec_f x44, x45, x46, x47;
370 vec_f x48, x49, x50, x51;
371 vec_f x52, x53, x54, x55;
372 vec_f x56, x57, x58, x59;
373 vec_f x60, x61, x62, x63;
374 vec_f x64, x65, x66, x67;
375 vec_f x68, x69, x70, x71;
376 vec_f x72, x73, x74, x75;
377 vec_f x76, x77, x78, x79;
378 vec_f x80, x81, x82, x83;
379 vec_f x84, x85, x86;
380
381 vz0 = vec_ld(0, &(out[0]));
382 vz1 = vec_ld(byte_2complex, &(out[0]));
383 vz2 = vec_ld(byte_4complex, &(out[0]));
384 vz3 = vec_ld(byte_6complex, &(out[0]));
385 vz4 = vec_ld(byte_8complex, &(out[0]));
386 vz5 = vec_ld(byte_10complex, &(out[0]));
387 vz6 = vec_ld(byte_12complex, &(out[0]));
388 vz7 = vec_ld(byte_14complex, &(out[0]));
389
390 x0 = vec_perm(vz0, vz1, vcprm(0,1,s2,s1));
391 x1 = vec_perm(vz0, vz1, vcprm(2,3,s0,s3));
392 x2 = vec_perm(vz2, vz3, vcprm(0,1,s0,s1));
393 x3 = vec_perm(vz2, vz3, vcprm(2,3,s2,s3));
394
395 x4 = vec_perm(vz4, vz5, vcprm(0,1,s2,s1));
396 x5 = vec_perm(vz4, vz5, vcprm(2,3,s0,s3));
397 x6 = vec_perm(vz6, vz7, vcprm(0,1,s2,s1));
398 x7 = vec_perm(vz6, vz7, vcprm(2,3,s0,s3));
399
400 x8 = vec_add(x0, x1);
401 x9 = vec_sub(x0, x1);
402 x10 = vec_add(x2, x3);
403 x11 = vec_sub(x2, x3);
404
405 x12 = vec_add(x4, x5);
406 x13 = vec_sub(x4, x5);
407 x14 = vec_add(x6, x7);
408 x15 = vec_sub(x6, x7);
409
410 x16 = vec_perm(x8, x9, vcprm(0,1,s0,s1));
411 x17 = vec_perm(x8, x9, vcprm(2,3,s3,s2));
412 x18 = vec_perm(x10, x11, vcprm(2,1,s1,s2));
413 x19 = vec_perm(x10, x11, vcprm(0,3,s0,s3));
414 x20 = vec_perm(x12, x14, vcprm(0,1,s0, s1));
415 x21 = vec_perm(x12, x14, vcprm(2,3,s2,s3));
416 x22 = vec_perm(x13, x15, vcprm(0,1,s0,s1));
417 x23 = vec_perm(x13, x15, vcprm(3,2,s3,s2));
418
419 x24 = vec_add(x16, x17);
420 x25 = vec_sub(x16, x17);
421 x26 = vec_add(x18, x19);
422 x27 = vec_sub(x18, x19);
423 x28 = vec_add(x20, x21);
424 x29 = vec_sub(x20, x21);
425 x30 = vec_add(x22, x23);
426 x31 = vec_sub(x22, x23);
427
428 x32 = vec_add(x24, x26);
429 x33 = vec_sub(x24, x26);
430 x34 = vec_perm(x32, x33, vcprm(0,1,s0,s1));
431
432 x35 = vec_perm(x28, x29, vcprm(2,1,s1,s2));
433 x36 = vec_perm(x28, x29, vcprm(0,3,s0,s3));
434 x37 = vec_add(x35, x36);
435 x38 = vec_sub(x35, x36);
436 x39 = vec_perm(x37, x38, vcprm(0,1,s1,s0));
437
438 x40 = vec_perm(x27, x38, vcprm(3,2,s2,s3));
439 x41 = vec_perm(x26, x37, vcprm(2,3,s3,s2));
440 x42 = vec_add(x40, x41);
441 x43 = vec_sub(x40, x41);
442 x44 = vec_mul(x42, vc0);
443 x45 = vec_mul(x43, vc0);
444
445 x46 = vec_add(x34, x39); // z0.r z0.i z4.r z4.i
446 x47 = vec_sub(x34, x39); // z8.r z8.i z12.r z12.i
447
448 x48 = vec_perm(x30, x31, vcprm(2,1,s1,s2));
449 x49 = vec_perm(x30, x31, vcprm(0,3,s3,s0));
450 x50 = vec_add(x48, x49);
451 x51 = vec_sub(x48, x49);
452 x52 = vec_mul(x50, vc1);
453 x53 = vec_mul(x50, vc2);
454 x54 = vec_mul(x51, vc1);
455 x55 = vec_mul(x51, vc2);
456
457 x56 = vec_perm(x24, x25, vcprm(2,3,s2,s3));
458 x57 = vec_perm(x44, x45, vcprm(0,1,s1,s0));
459 x58 = vec_add(x56, x57);
460 x59 = vec_sub(x56, x57);
461
462 x60 = vec_perm(x54, x55, vcprm(1,0,3,2));
463 x61 = vec_perm(x54, x55, vcprm(s1,s0,s3,s2));
464 x62 = vec_add(x52, x61);
465 x63 = vec_sub(x52, x61);
466 x64 = vec_add(x60, x53);
467 x65 = vec_sub(x60, x53);
468 x66 = vec_perm(x62, x64, vcprm(0,1,s3,s2));
469 x67 = vec_perm(x63, x65, vcprm(s0,s1,3,2));
470
471 x68 = vec_add(x58, x66); // z1.r z1.i z3.r z3.i
472 x69 = vec_sub(x58, x66); // z9.r z9.i z11.r z11.i
473 x70 = vec_add(x59, x67); // z5.r z5.i z15.r z15.i
474 x71 = vec_sub(x59, x67); // z13.r z13.i z7.r z7.i
475
476 x72 = vec_perm(x25, x27, vcprm(s1,s0,s2,s3));
477 x73 = vec_add(x25, x72);
478 x74 = vec_sub(x25, x72);
479 x75 = vec_perm(x73, x74, vcprm(0,1,s0,s1));
480 x76 = vec_perm(x44, x45, vcprm(3,2,s2,s3));
481 x77 = vec_add(x75, x76); // z2.r z2.i z6.r z6.i
482 x78 = vec_sub(x75, x76); // z10.r z10.i z14.r z14.i
483
484 x79 = vec_perm(x46, x68, vcprm(0,1,s0,s1)); // z0.r z0.i z1.r z1.i
485 x80 = vec_perm(x77, x68, vcprm(0,1,s2,s3)); // z2.r z2.i z3.r z3.i
486 x81 = vec_perm(x46, x70, vcprm(2,3,s0,s1)); // z4.r z4.i z5.r z5.i
487 x82 = vec_perm(x71, x77, vcprm(s2,s3,2,3)); // z6.r z6.i z7.r z7.i
488 vec_st(x79, 0, &(out[0]));
489 vec_st(x80, byte_2complex, &(out[0]));
490 vec_st(x81, byte_4complex, &(out[0]));
491 vec_st(x82, byte_6complex, &(out[0]));
492 x83 = vec_perm(x47, x69, vcprm(0,1,s0,s1)); // z8.r z8.i z9.r z9.i
493 x84 = vec_perm(x78, x69, vcprm(0,1,s2,s3)); // z10.r z10.i z11.r z11.i
494 x85 = vec_perm(x47, x71, vcprm(2,3,s0,s1)); // z12.r z12.i z13.r z13.i
495 x86 = vec_perm(x70, x78, vcprm(s2,s3,2,3)); // z14.r z14.i z15.r z15.i
496 vec_st(x83, byte_8complex, &(out[0]));
497 vec_st(x84, byte_10complex, &(out[0]));
498 vec_st(x85, byte_12complex, &(out[0]));
499 vec_st(x86, byte_14complex, &(out[0]));
500 }
501
502 inline static void fft4_vsx(FFTComplex *z)
503 {
504 vec_f a, b, c, d;
505 float* out= (float*)z;
506 a = vec_ld(0, &(out[0]));
507 b = vec_ld(byte_2complex, &(out[0]));
508
509 c = vec_perm(a, b, vcprm(0,1,s2,s1));
510 d = vec_perm(a, b, vcprm(2,3,s0,s3));
511 a = vec_add(c, d);
512 b = vec_sub(c, d);
513
514 c = vec_perm(a,b, vcprm(0,s0,1,s1));
515 d = vec_perm(a, b, vcprm(2,s3,3,s2));
516
517 a = vec_add(c, d);
518 b = vec_sub(c, d);
519
520 c = vec_perm(a, b, vcprm(0,1,s0,s1));
521 d = vec_perm(a, b, vcprm(2,3,s2,s3));
522
523 vec_st(c, 0, &(out[0]));
524 vec_st(d, byte_2complex, &(out[0]));
525 return;
526 }
527
528 inline static void fft8_vsx(FFTComplex *z)
529 {
530 vec_f vz0, vz1, vz2, vz3;
531 vec_f vz4, vz5, vz6, vz7, vz8;
532
533 float* out= (float*)z;
534 vec_f vc0 = {0.0, 0.0, 0.0, 0.0};
535 vec_f vc1 = {-sqrthalf, sqrthalf, sqrthalf, -sqrthalf};
536 vec_f vc2 = {sqrthalf, sqrthalf, sqrthalf, sqrthalf};
537
538 vz0 = vec_ld(0, &(out[0]));
539 vz1 = vec_ld(byte_2complex, &(out[0]));
540 vz2 = vec_ld(byte_4complex, &(out[0]));
541 vz3 = vec_ld(byte_6complex, &(out[0]));
542
543 vz6 = vec_perm(vz2, vz3, vcprm(0,s0,1,s1));
544 vz7 = vec_perm(vz2, vz3, vcprm(2,s2,3,s3));
545 vz4 = vec_perm(vz0, vz1, vcprm(0,1,s2,s1));
546 vz5 = vec_perm(vz0, vz1, vcprm(2,3,s0,s3));
547
548 vz2 = vec_add(vz6, vz7);
549 vz3 = vec_sub(vz6, vz7);
550 vz8 = vec_perm(vz3, vz3, vcprm(2,3,0,1));
551
552 vz0 = vec_add(vz4, vz5);
553 vz1 = vec_sub(vz4, vz5);
554
555 vz3 = vec_madd(vz3, vc1, vc0);
556 vz3 = vec_madd(vz8, vc2, vz3);
557
558 vz4 = vec_perm(vz0, vz1, vcprm(0,s0,1,s1));
559 vz5 = vec_perm(vz0, vz1, vcprm(2,s3,3,s2));
560 vz6 = vec_perm(vz2, vz3, vcprm(1,2,s3,s0));
561 vz7 = vec_perm(vz2, vz3, vcprm(0,3,s2,s1));
562
563 vz0 = vec_add(vz4, vz5);
564 vz1 = vec_sub(vz4, vz5);
565 vz2 = vec_add(vz6, vz7);
566 vz3 = vec_sub(vz6, vz7);
567
568 vz4 = vec_perm(vz0, vz1, vcprm(0,1,s0,s1));
569 vz5 = vec_perm(vz0, vz1, vcprm(2,3,s2,s3));
570 vz6 = vec_perm(vz2, vz3, vcprm(0,2,s1,s3));
571 vz7 = vec_perm(vz2, vz3, vcprm(1,3,s0,s2));
572
573
574 vz2 = vec_sub(vz4, vz6);
575 vz3 = vec_sub(vz5, vz7);
576
577 vz0 = vec_add(vz4, vz6);
578 vz1 = vec_add(vz5, vz7);
579
580 vec_st(vz0, 0, &(out[0]));
581 vec_st(vz1, byte_2complex, &(out[0]));
582 vec_st(vz2, byte_4complex, &(out[0]));
583 vec_st(vz3, byte_6complex, &(out[0]));
584 return;
585 }
586
587 inline static void fft16_vsx(FFTComplex *z)
588 {
589 float* out= (float*)z;
590 vec_f vc0 = {0.0, 0.0, 0.0, 0.0};
591 vec_f vc1 = {-sqrthalf, sqrthalf, sqrthalf, -sqrthalf};
592 vec_f vc2 = {sqrthalf, sqrthalf, sqrthalf, sqrthalf};
593 vec_f vc3 = {1.0, 0.92387953, sqrthalf, 0.38268343};
594 vec_f vc4 = {0.0, 0.38268343, sqrthalf, 0.92387953};
595 vec_f vc5 = {-0.0, -0.38268343, -sqrthalf, -0.92387953};
596
597 vec_f vz0, vz1, vz2, vz3;
598 vec_f vz4, vz5, vz6, vz7;
599 vec_f vz8, vz9, vz10, vz11;
600 vec_f vz12, vz13;
601
602 vz0 = vec_ld(byte_8complex, &(out[0]));
603 vz1 = vec_ld(byte_10complex, &(out[0]));
604 vz2 = vec_ld(byte_12complex, &(out[0]));
605 vz3 = vec_ld(byte_14complex, &(out[0]));
606
607 vz4 = vec_perm(vz0, vz1, vcprm(0,1,s2,s1));
608 vz5 = vec_perm(vz0, vz1, vcprm(2,3,s0,s3));
609 vz6 = vec_perm(vz2, vz3, vcprm(0,1,s2,s1));
610 vz7 = vec_perm(vz2, vz3, vcprm(2,3,s0,s3));
611
612 vz0 = vec_add(vz4, vz5);
613 vz1= vec_sub(vz4, vz5);
614 vz2 = vec_add(vz6, vz7);
615 vz3 = vec_sub(vz6, vz7);
616
617 vz4 = vec_perm(vz0, vz1, vcprm(0,s0,1,s1));
618 vz5 = vec_perm(vz0, vz1, vcprm(2,s3,3,s2));
619 vz6 = vec_perm(vz2, vz3, vcprm(0,s0,1,s1));
620 vz7 = vec_perm(vz2, vz3, vcprm(2,s3,3,s2));
621
622 vz0 = vec_add(vz4, vz5);
623 vz1 = vec_sub(vz4, vz5);
624 vz2 = vec_add(vz6, vz7);
625 vz3 = vec_sub(vz6, vz7);
626
627 vz4 = vec_perm(vz0, vz1, vcprm(0,1,s0,s1));
628 vz5 = vec_perm(vz0, vz1, vcprm(2,3,s2,s3));
629
630 vz6 = vec_perm(vz2, vz3, vcprm(0,1,s0,s1));
631 vz7 = vec_perm(vz2, vz3, vcprm(2,3,s2,s3));
632
633 vz0 = vec_ld(0, &(out[0]));
634 vz1 = vec_ld(byte_2complex, &(out[0]));
635 vz2 = vec_ld(byte_4complex, &(out[0]));
636 vz3 = vec_ld(byte_6complex, &(out[0]));
637 vz10 = vec_perm(vz2, vz3, vcprm(0,s0,1,s1));
638 vz11 = vec_perm(vz2, vz3, vcprm(2,s2,3,s3));
639 vz8 = vec_perm(vz0, vz1, vcprm(0,1,s2,s1));
640 vz9 = vec_perm(vz0, vz1, vcprm(2,3,s0,s3));
641
642 vz2 = vec_add(vz10, vz11);
643 vz3 = vec_sub(vz10, vz11);
644 vz12 = vec_perm(vz3, vz3, vcprm(2,3,0,1));
645 vz0 = vec_add(vz8, vz9);
646 vz1 = vec_sub(vz8, vz9);
647
648 vz3 = vec_madd(vz3, vc1, vc0);
649 vz3 = vec_madd(vz12, vc2, vz3);
650 vz8 = vec_perm(vz0, vz1, vcprm(0,s0,1,s1));
651 vz9 = vec_perm(vz0, vz1, vcprm(2,s3,3,s2));
652 vz10 = vec_perm(vz2, vz3, vcprm(1,2,s3,s0));
653 vz11 = vec_perm(vz2, vz3, vcprm(0,3,s2,s1));
654
655 vz0 = vec_add(vz8, vz9);
656 vz1 = vec_sub(vz8, vz9);
657 vz2 = vec_add(vz10, vz11);
658 vz3 = vec_sub(vz10, vz11);
659
660 vz8 = vec_perm(vz0, vz1, vcprm(0,1,s0,s1));
661 vz9 = vec_perm(vz0, vz1, vcprm(2,3,s2,s3));
662 vz10 = vec_perm(vz2, vz3, vcprm(0,2,s1,s3));
663 vz11 = vec_perm(vz2, vz3, vcprm(1,3,s0,s2));
664
665 vz2 = vec_sub(vz8, vz10);
666 vz3 = vec_sub(vz9, vz11);
667 vz0 = vec_add(vz8, vz10);
668 vz1 = vec_add(vz9, vz11);
669
670 vz8 = vec_madd(vz4, vc3, vc0);
671 vz9 = vec_madd(vz5, vc3, vc0);
672 vz10 = vec_madd(vz6, vc3, vc0);
673 vz11 = vec_madd(vz7, vc3, vc0);
674
675 vz8 = vec_madd(vz5, vc4, vz8);
676 vz9 = vec_madd(vz4, vc5, vz9);
677 vz10 = vec_madd(vz7, vc5, vz10);
678 vz11 = vec_madd(vz6, vc4, vz11);
679
680 vz12 = vec_sub(vz10, vz8);
681 vz10 = vec_add(vz10, vz8);
682
683 vz13 = vec_sub(vz9, vz11);
684 vz11 = vec_add(vz9, vz11);
685
686 vz4 = vec_sub(vz0, vz10);
687 vz0 = vec_add(vz0, vz10);
688
689 vz7= vec_sub(vz3, vz12);
690 vz3= vec_add(vz3, vz12);
691
692 vz5 = vec_sub(vz1, vz11);
693 vz1 = vec_add(vz1, vz11);
694
695 vz6 = vec_sub(vz2, vz13);
696 vz2 = vec_add(vz2, vz13);
697
698 vec_st(vz0, 0, &(out[0]));
699 vec_st(vz1, byte_2complex, &(out[0]));
700 vec_st(vz2, byte_4complex, &(out[0]));
701 vec_st(vz3, byte_6complex, &(out[0]));
702 vec_st(vz4, byte_8complex, &(out[0]));
703 vec_st(vz5, byte_10complex, &(out[0]));
704 vec_st(vz6, byte_12complex, &(out[0]));
705 vec_st(vz7, byte_14complex, &(out[0]));
706 return;
707
708 }
709 inline static void pass_vsx(FFTComplex * z, const FFTSample * wre, unsigned int n)
710 {
711 int o1 = n<<1;
712 int o2 = n<<2;
713 int o3 = o1+o2;
714 int i1, i2, i3;
715 FFTSample* out = (FFTSample*)z;
716 const FFTSample *wim = wre+o1;
717 vec_f v0, v1, v2, v3;
718 vec_f v4, v5, v6, v7;
719 vec_f v8, v9, v10, v11;
720 vec_f v12, v13;
721
722 n = n-2;
723 i1 = o1*sizeof(FFTComplex);
724 i2 = o2*sizeof(FFTComplex);
725 i3 = o3*sizeof(FFTComplex);
726
727 v8 = vec_ld(0, &(wre[0]));
728 v10 = vec_ld(0, &(wim[0]));
729 v9 = vec_ld(0, &(wim[-4]));
730 v9 = vec_perm(v9, v10, vcprm(s0,3,2,1));
731
732 v4 = vec_ld(i2, &(out[0]));
733 v5 = vec_ld(i2+16, &(out[0]));
734 v6 = vec_ld(i3, &(out[0]));
735 v7 = vec_ld(i3+16, &(out[0]));
736 v10 = vec_mul(v4, v8); // r2*wre
737 v11 = vec_mul(v5, v8); // i2*wre
738 v12 = vec_mul(v6, v8); // r3*wre
739 v13 = vec_mul(v7, v8); // i3*wre
740
741 v0 = vec_ld(0, &(out[0])); // r0
742 v3 = vec_ld(i1+16, &(out[0])); // i1
743 v10 = vec_madd(v5, v9, v10); // r2*wim
744 v11 = vec_nmsub(v4, v9, v11); // i2*wim
745 v12 = vec_nmsub(v7, v9, v12); // r3*wim
746 v13 = vec_madd(v6, v9, v13); // i3*wim
747
748 v1 = vec_ld(16, &(out[0])); // i0
749 v2 = vec_ld(i1, &(out[0])); // r1
750 v8 = vec_sub(v12, v10);
751 v12 = vec_add(v12, v10);
752 v9 = vec_sub(v11, v13);
753 v13 = vec_add(v11, v13);
754 v4 = vec_sub(v0, v12);
755 v0 = vec_add(v0, v12);
756 v7 = vec_sub(v3, v8);
757 v3 = vec_add(v3, v8);
758
759 vec_st(v0, 0, &(out[0])); // r0
760 vec_st(v3, i1+16, &(out[0])); // i1
761 vec_st(v4, i2, &(out[0])); // r2
762 vec_st(v7, i3+16, &(out[0]));// i3
763
764 v5 = vec_sub(v1, v13);
765 v1 = vec_add(v1, v13);
766 v6 = vec_sub(v2, v9);
767 v2 = vec_add(v2, v9);
768
769 vec_st(v1, 16, &(out[0])); // i0
770 vec_st(v2, i1, &(out[0])); // r1
771 vec_st(v5, i2+16, &(out[0])); // i2
772 vec_st(v6, i3, &(out[0])); // r3
773
774 do {
775 out += 8;
776 wre += 4;
777 wim -= 4;
778
779 v8 = vec_ld(0, &(wre[0]));
780 v10 = vec_ld(0, &(wim[0]));
781 v9 = vec_ld(0, &(wim[-4]));
782 v9 = vec_perm(v9, v10, vcprm(s0,3,2,1));
783
784 v4 = vec_ld(i2, &(out[0])); // r2
785 v5 = vec_ld(i2+16, &(out[0])); // i2
786 v6 = vec_ld(i3, &(out[0])); // r3
787 v7 = vec_ld(i3+16, &(out[0]));// i3
788 v10 = vec_mul(v4, v8); // r2*wre
789 v11 = vec_mul(v5, v8); // i2*wre
790 v12 = vec_mul(v6, v8); // r3*wre
791 v13 = vec_mul(v7, v8); // i3*wre
792
793 v0 = vec_ld(0, &(out[0])); // r0
794 v3 = vec_ld(i1+16, &(out[0])); // i1
795 v10 = vec_madd(v5, v9, v10); // r2*wim
796 v11 = vec_nmsub(v4, v9, v11); // i2*wim
797 v12 = vec_nmsub(v7, v9, v12); // r3*wim
798 v13 = vec_madd(v6, v9, v13); // i3*wim
799
800 v1 = vec_ld(16, &(out[0])); // i0
801 v2 = vec_ld(i1, &(out[0])); // r1
802 v8 = vec_sub(v12, v10);
803 v12 = vec_add(v12, v10);
804 v9 = vec_sub(v11, v13);
805 v13 = vec_add(v11, v13);
806 v4 = vec_sub(v0, v12);
807 v0 = vec_add(v0, v12);
808 v7 = vec_sub(v3, v8);
809 v3 = vec_add(v3, v8);
810
811 vec_st(v0, 0, &(out[0])); // r0
812 vec_st(v3, i1+16, &(out[0])); // i1
813 vec_st(v4, i2, &(out[0])); // r2
814 vec_st(v7, i3+16, &(out[0])); // i3
815
816 v5 = vec_sub(v1, v13);
817 v1 = vec_add(v1, v13);
818 v6 = vec_sub(v2, v9);
819 v2 = vec_add(v2, v9);
820
821 vec_st(v1, 16, &(out[0])); // i0
822 vec_st(v2, i1, &(out[0])); // r1
823 vec_st(v5, i2+16, &(out[0])); // i2
824 vec_st(v6, i3, &(out[0])); // r3
825 } while (n-=2);
826 }
827
828 #endif
829
830 #endif /* AVCODEC_PPC_FFT_VSX_H */