Remove stray commented out line, fix individual regression test dependencies.
[libav.git] / libavcodec / i386 / fft_sse.c
CommitLineData
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1/*
2 * FFT/MDCT transform with SSE optimizations
3 * Copyright (c) 2002 Fabrice Bellard.
4 *
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
bb6f5690 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
bb6f5690 20 */
b550bfaa 21#include "dsputil.h"
bb6f5690 22
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23static const int p1p1p1m1[4] __attribute__((aligned(16))) =
24 { 0, 0, 0, 1 << 31 };
bb6f5690 25
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26static const int p1p1m1p1[4] __attribute__((aligned(16))) =
27 { 0, 0, 1 << 31, 0 };
e1958604 28
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29static const int p1p1m1m1[4] __attribute__((aligned(16))) =
30 { 0, 0, 1 << 31, 1 << 31 };
bb6f5690 31
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32static const int p1m1p1m1[4] __attribute__((aligned(16))) =
33 { 0, 1 << 31, 0, 1 << 31 };
34
35static const int m1m1m1m1[4] __attribute__((aligned(16))) =
36 { 1 << 31, 1 << 31, 1 << 31, 1 << 31 };
37
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38#if 0
39static void print_v4sf(const char *str, __m128 a)
40{
41 float *p = (float *)&a;
42 printf("%s: %f %f %f %f\n",
43 str, p[0], p[1], p[2], p[3]);
44}
45#endif
46
47/* XXX: handle reverse case */
68951ecf 48void ff_fft_calc_sse(FFTContext *s, FFTComplex *z)
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49{
50 int ln = s->nbits;
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51 long i, j;
52 long nblocks, nloops;
53 FFTComplex *p, *cptr;
54
55 asm volatile(
56 "movaps %0, %%xmm4 \n\t"
57 "movaps %1, %%xmm5 \n\t"
58 ::"m"(*p1p1m1m1),
59 "m"(*(s->inverse ? p1p1m1p1 : p1p1p1m1))
60 );
61
62 i = 8 << ln;
63 asm volatile(
64 "1: \n\t"
65 "sub $32, %0 \n\t"
66 /* do the pass 0 butterfly */
67 "movaps (%0,%1), %%xmm0 \n\t"
68 "movaps %%xmm0, %%xmm1 \n\t"
69 "shufps $0x4E, %%xmm0, %%xmm0 \n\t"
70 "xorps %%xmm4, %%xmm1 \n\t"
71 "addps %%xmm1, %%xmm0 \n\t"
72 "movaps 16(%0,%1), %%xmm2 \n\t"
73 "movaps %%xmm2, %%xmm3 \n\t"
74 "shufps $0x4E, %%xmm2, %%xmm2 \n\t"
75 "xorps %%xmm4, %%xmm3 \n\t"
76 "addps %%xmm3, %%xmm2 \n\t"
77 /* multiply third by -i */
78 /* by toggling the sign bit */
79 "shufps $0xB4, %%xmm2, %%xmm2 \n\t"
80 "xorps %%xmm5, %%xmm2 \n\t"
81 /* do the pass 1 butterfly */
82 "movaps %%xmm0, %%xmm1 \n\t"
83 "addps %%xmm2, %%xmm0 \n\t"
84 "subps %%xmm2, %%xmm1 \n\t"
85 "movaps %%xmm0, (%0,%1) \n\t"
86 "movaps %%xmm1, 16(%0,%1) \n\t"
87 "jg 1b \n\t"
88 :"+r"(i)
89 :"r"(z)
90 );
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91 /* pass 2 .. ln-1 */
92
1e4ecf26 93 nblocks = 1 << (ln-3);
bb6f5690 94 nloops = 1 << 2;
1e4ecf26 95 cptr = s->exptab1;
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96 do {
97 p = z;
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98 j = nblocks;
99 do {
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100 i = nloops*8;
101 asm volatile(
102 "1: \n\t"
25e4f8aa 103 "sub $32, %0 \n\t"
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104 "movaps (%2,%0), %%xmm1 \n\t"
105 "movaps (%1,%0), %%xmm0 \n\t"
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106 "movaps 16(%2,%0), %%xmm5 \n\t"
107 "movaps 16(%1,%0), %%xmm4 \n\t"
1e4ecf26 108 "movaps %%xmm1, %%xmm2 \n\t"
25e4f8aa 109 "movaps %%xmm5, %%xmm6 \n\t"
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110 "shufps $0xA0, %%xmm1, %%xmm1 \n\t"
111 "shufps $0xF5, %%xmm2, %%xmm2 \n\t"
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112 "shufps $0xA0, %%xmm5, %%xmm5 \n\t"
113 "shufps $0xF5, %%xmm6, %%xmm6 \n\t"
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114 "mulps (%3,%0,2), %%xmm1 \n\t" // cre*re cim*re
115 "mulps 16(%3,%0,2), %%xmm2 \n\t" // -cim*im cre*im
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116 "mulps 32(%3,%0,2), %%xmm5 \n\t" // cre*re cim*re
117 "mulps 48(%3,%0,2), %%xmm6 \n\t" // -cim*im cre*im
1e4ecf26 118 "addps %%xmm2, %%xmm1 \n\t"
25e4f8aa 119 "addps %%xmm6, %%xmm5 \n\t"
1e4ecf26 120 "movaps %%xmm0, %%xmm3 \n\t"
25e4f8aa 121 "movaps %%xmm4, %%xmm7 \n\t"
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122 "addps %%xmm1, %%xmm0 \n\t"
123 "subps %%xmm1, %%xmm3 \n\t"
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124 "addps %%xmm5, %%xmm4 \n\t"
125 "subps %%xmm5, %%xmm7 \n\t"
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126 "movaps %%xmm0, (%1,%0) \n\t"
127 "movaps %%xmm3, (%2,%0) \n\t"
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128 "movaps %%xmm4, 16(%1,%0) \n\t"
129 "movaps %%xmm7, 16(%2,%0) \n\t"
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130 "jg 1b \n\t"
131 :"+r"(i)
132 :"r"(p), "r"(p + nloops), "r"(cptr)
133 );
134 p += nloops*2;
bb6f5690 135 } while (--j);
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136 cptr += nloops*2;
137 nblocks >>= 1;
138 nloops <<= 1;
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139 } while (nblocks != 0);
140}
e1958604 141
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142void ff_imdct_calc_sse(MDCTContext *s, FFTSample *output,
143 const FFTSample *input, FFTSample *tmp)
144{
145 long k, n8, n4, n2, n;
146 const uint16_t *revtab = s->fft.revtab;
147 const FFTSample *tcos = s->tcos;
148 const FFTSample *tsin = s->tsin;
149 const FFTSample *in1, *in2;
150 FFTComplex *z = (FFTComplex *)tmp;
151
152 n = 1 << s->nbits;
153 n2 = n >> 1;
154 n4 = n >> 2;
155 n8 = n >> 3;
156
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157#ifdef ARCH_X86_64
158 asm volatile ("movaps %0, %%xmm8\n\t"::"m"(*p1m1p1m1));
159#define P1M1P1M1 "%%xmm8"
160#else
161#define P1M1P1M1 "%4"
162#endif
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163
164 /* pre rotation */
165 in1 = input;
166 in2 = input + n2 - 4;
167
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168 /* Complex multiplication */
169 for (k = 0; k < n4; k += 4) {
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170 asm volatile (
171 "movaps %0, %%xmm0 \n\t" // xmm0 = r0 X r1 X : in2
172 "movaps %1, %%xmm3 \n\t" // xmm3 = X i1 X i0: in1
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173 "movaps -16+%0, %%xmm4 \n\t" // xmm4 = r0 X r1 X : in2
174 "movaps 16+%1, %%xmm7 \n\t" // xmm7 = X i1 X i0: in1
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175 "movlps %2, %%xmm1 \n\t" // xmm1 = X X R1 R0: tcos
176 "movlps %3, %%xmm2 \n\t" // xmm2 = X X I1 I0: tsin
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177 "movlps 8+%2, %%xmm5 \n\t" // xmm5 = X X R1 R0: tcos
178 "movlps 8+%3, %%xmm6 \n\t" // xmm6 = X X I1 I0: tsin
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179 "shufps $95, %%xmm0, %%xmm0 \n\t" // xmm0 = r1 r1 r0 r0
180 "shufps $160,%%xmm3, %%xmm3 \n\t" // xmm3 = i1 i1 i0 i0
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181 "shufps $95, %%xmm4, %%xmm4 \n\t" // xmm4 = r1 r1 r0 r0
182 "shufps $160,%%xmm7, %%xmm7 \n\t" // xmm7 = i1 i1 i0 i0
ebbafcb4 183 "unpcklps %%xmm2, %%xmm1 \n\t" // xmm1 = I1 R1 I0 R0
25e4f8aa 184 "unpcklps %%xmm6, %%xmm5 \n\t" // xmm5 = I1 R1 I0 R0
ebbafcb4 185 "movaps %%xmm1, %%xmm2 \n\t" // xmm2 = I1 R1 I0 R0
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186 "movaps %%xmm5, %%xmm6 \n\t" // xmm6 = I1 R1 I0 R0
187 "xorps "P1M1P1M1", %%xmm2 \n\t" // xmm2 = -I1 R1 -I0 R0
188 "xorps "P1M1P1M1", %%xmm6 \n\t" // xmm6 = -I1 R1 -I0 R0
ebbafcb4 189 "mulps %%xmm1, %%xmm0 \n\t" // xmm0 = rI rR rI rR
25e4f8aa 190 "mulps %%xmm5, %%xmm4 \n\t" // xmm4 = rI rR rI rR
ebbafcb4 191 "shufps $177,%%xmm2, %%xmm2 \n\t" // xmm2 = R1 -I1 R0 -I0
25e4f8aa 192 "shufps $177,%%xmm6, %%xmm6 \n\t" // xmm6 = R1 -I1 R0 -I0
ebbafcb4 193 "mulps %%xmm2, %%xmm3 \n\t" // xmm3 = Ri -Ii Ri -Ii
25e4f8aa 194 "mulps %%xmm6, %%xmm7 \n\t" // xmm7 = Ri -Ii Ri -Ii
ebbafcb4 195 "addps %%xmm3, %%xmm0 \n\t" // xmm0 = result
25e4f8aa 196 "addps %%xmm7, %%xmm4 \n\t" // xmm4 = result
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197 ::"m"(in2[-2*k]), "m"(in1[2*k]),
198 "m"(tcos[k]), "m"(tsin[k])
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199#ifndef ARCH_X86_64
200 ,"m"(*p1m1p1m1)
201#endif
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202 );
203 /* Should be in the same block, hack for gcc2.95 & gcc3 */
204 asm (
205 "movlps %%xmm0, %0 \n\t"
206 "movhps %%xmm0, %1 \n\t"
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207 "movlps %%xmm4, %2 \n\t"
208 "movhps %%xmm4, %3 \n\t"
209 :"=m"(z[revtab[k]]), "=m"(z[revtab[k + 1]]),
210 "=m"(z[revtab[k + 2]]), "=m"(z[revtab[k + 3]])
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211 );
212 }
213
214 ff_fft_calc_sse(&s->fft, z);
215
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216#ifndef ARCH_X86_64
217#undef P1M1P1M1
218#define P1M1P1M1 "%3"
219#endif
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220
221 /* post rotation + reordering */
25e4f8aa 222 for (k = 0; k < n4; k += 4) {
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223 asm (
224 "movaps %0, %%xmm0 \n\t" // xmm0 = i1 r1 i0 r0: z
25e4f8aa 225 "movaps 16+%0, %%xmm4 \n\t" // xmm4 = i1 r1 i0 r0: z
ebbafcb4 226 "movlps %1, %%xmm1 \n\t" // xmm1 = X X R1 R0: tcos
25e4f8aa 227 "movlps 8+%1, %%xmm5 \n\t" // xmm5 = X X R1 R0: tcos
ebbafcb4 228 "movaps %%xmm0, %%xmm3 \n\t" // xmm3 = i1 r1 i0 r0
25e4f8aa 229 "movaps %%xmm4, %%xmm7 \n\t" // xmm7 = i1 r1 i0 r0
ebbafcb4 230 "movlps %2, %%xmm2 \n\t" // xmm2 = X X I1 I0: tsin
25e4f8aa 231 "movlps 8+%2, %%xmm6 \n\t" // xmm6 = X X I1 I0: tsin
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232 "shufps $160,%%xmm0, %%xmm0 \n\t" // xmm0 = r1 r1 r0 r0
233 "shufps $245,%%xmm3, %%xmm3 \n\t" // xmm3 = i1 i1 i0 i0
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234 "shufps $160,%%xmm4, %%xmm4 \n\t" // xmm4 = r1 r1 r0 r0
235 "shufps $245,%%xmm7, %%xmm7 \n\t" // xmm7 = i1 i1 i0 i0
ebbafcb4 236 "unpcklps %%xmm2, %%xmm1 \n\t" // xmm1 = I1 R1 I0 R0
25e4f8aa 237 "unpcklps %%xmm6, %%xmm5 \n\t" // xmm5 = I1 R1 I0 R0
ebbafcb4 238 "movaps %%xmm1, %%xmm2 \n\t" // xmm2 = I1 R1 I0 R0
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239 "movaps %%xmm5, %%xmm6 \n\t" // xmm6 = I1 R1 I0 R0
240 "xorps "P1M1P1M1", %%xmm2 \n\t" // xmm2 = -I1 R1 -I0 R0
ebbafcb4 241 "mulps %%xmm1, %%xmm0 \n\t" // xmm0 = rI rR rI rR
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242 "xorps "P1M1P1M1", %%xmm6 \n\t" // xmm6 = -I1 R1 -I0 R0
243 "mulps %%xmm5, %%xmm4 \n\t" // xmm4 = rI rR rI rR
ebbafcb4 244 "shufps $177,%%xmm2, %%xmm2 \n\t" // xmm2 = R1 -I1 R0 -I0
25e4f8aa 245 "shufps $177,%%xmm6, %%xmm6 \n\t" // xmm6 = R1 -I1 R0 -I0
ebbafcb4 246 "mulps %%xmm2, %%xmm3 \n\t" // xmm3 = Ri -Ii Ri -Ii
25e4f8aa 247 "mulps %%xmm6, %%xmm7 \n\t" // xmm7 = Ri -Ii Ri -Ii
ebbafcb4 248 "addps %%xmm3, %%xmm0 \n\t" // xmm0 = result
25e4f8aa 249 "addps %%xmm7, %%xmm4 \n\t" // xmm4 = result
ebbafcb4 250 "movaps %%xmm0, %0 \n\t"
25e4f8aa 251 "movaps %%xmm4, 16+%0 \n\t"
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252 :"+m"(z[k])
253 :"m"(tcos[k]), "m"(tsin[k])
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254#ifndef ARCH_X86_64
255 ,"m"(*p1m1p1m1)
256#endif
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257 );
258 }
259
260 /*
261 Mnemonics:
262 0 = z[k].re
263 1 = z[k].im
264 2 = z[k + 1].re
265 3 = z[k + 1].im
266 4 = z[-k - 2].re
267 5 = z[-k - 2].im
268 6 = z[-k - 1].re
269 7 = z[-k - 1].im
270 */
271 k = 16-n;
272 asm volatile("movaps %0, %%xmm7 \n\t"::"m"(*m1m1m1m1));
273 asm volatile(
274 "1: \n\t"
275 "movaps -16(%4,%0), %%xmm1 \n\t" // xmm1 = 4 5 6 7 = z[-2-k]
276 "neg %0 \n\t"
277 "movaps (%4,%0), %%xmm0 \n\t" // xmm0 = 0 1 2 3 = z[k]
278 "xorps %%xmm7, %%xmm0 \n\t" // xmm0 = -0 -1 -2 -3
279 "movaps %%xmm0, %%xmm2 \n\t" // xmm2 = -0 -1 -2 -3
280 "shufps $141,%%xmm1, %%xmm0 \n\t" // xmm0 = -1 -3 4 6
281 "shufps $216,%%xmm1, %%xmm2 \n\t" // xmm2 = -0 -2 5 7
282 "shufps $156,%%xmm0, %%xmm0 \n\t" // xmm0 = -1 6 -3 4 !
283 "shufps $156,%%xmm2, %%xmm2 \n\t" // xmm2 = -0 7 -2 5 !
284 "movaps %%xmm0, (%1,%0) \n\t" // output[2*k]
285 "movaps %%xmm2, (%2,%0) \n\t" // output[n2+2*k]
286 "neg %0 \n\t"
287 "shufps $27, %%xmm0, %%xmm0 \n\t" // xmm0 = 4 -3 6 -1
288 "xorps %%xmm7, %%xmm0 \n\t" // xmm0 = -4 3 -6 1 !
289 "shufps $27, %%xmm2, %%xmm2 \n\t" // xmm2 = 5 -2 7 -0 !
290 "movaps %%xmm0, -16(%2,%0) \n\t" // output[n2-4-2*k]
291 "movaps %%xmm2, -16(%3,%0) \n\t" // output[n-4-2*k]
292 "add $16, %0 \n\t"
293 "jle 1b \n\t"
294 :"+r"(k)
295 :"r"(output), "r"(output+n2), "r"(output+n), "r"(z+n8)
296 :"memory"
297 );
298}
299