2 * FFT/MDCT transform with SSE optimizations
3 * Copyright (c) 2008 Loren Merritt
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/x86_cpu.h"
23 #include "libavcodec/dsputil.h"
27 DECLARE_ASM_CONST(16, unsigned int, ff_m1m1m1m1)[4] =
28 { 1U << 31, 1U << 31, 1U << 31, 1U << 31 };
30 void ff_fft_dispatch_sse(FFTComplex *z, int nbits);
31 void ff_fft_dispatch_interleave_sse(FFTComplex *z, int nbits);
32 void ff_fft_dispatch_interleave_avx(FFTComplex *z, int nbits);
35 void ff_fft_calc_avx(FFTContext *s, FFTComplex *z)
37 ff_fft_dispatch_interleave_avx(z, s->nbits);
41 void ff_fft_calc_sse(FFTContext *s, FFTComplex *z)
43 int n = 1 << s->nbits;
45 ff_fft_dispatch_interleave_sse(z, s->nbits);
51 "movaps (%0,%1), %%xmm0 \n"
52 "movaps %%xmm0, %%xmm1 \n"
53 "unpcklps 16(%0,%1), %%xmm0 \n"
54 "unpckhps 16(%0,%1), %%xmm1 \n"
55 "movaps %%xmm0, (%0,%1) \n"
56 "movaps %%xmm1, 16(%0,%1) \n"
66 void ff_fft_permute_sse(FFTContext *s, FFTComplex *z)
68 int n = 1 << s->nbits;
72 "movaps %2, %%xmm0 \n"
73 "movlps %%xmm0, %0 \n"
74 "movhps %%xmm0, %1 \n"
75 :"=m"(s->tmp_buf[s->revtab[i]]),
76 "=m"(s->tmp_buf[s->revtab[i+1]])
80 memcpy(z, s->tmp_buf, n*sizeof(FFTComplex));
83 void ff_imdct_calc_sse(FFTContext *s, FFTSample *output, const FFTSample *input)
86 long n = s->mdct_size;
89 s->imdct_half(s, output + n4, input);
94 "movaps "MANGLE(ff_m1m1m1m1)", %%xmm7 \n"
96 "movaps (%2,%1), %%xmm0 \n"
97 "movaps (%3,%0), %%xmm1 \n"
98 "shufps $0x1b, %%xmm0, %%xmm0 \n"
99 "shufps $0x1b, %%xmm1, %%xmm1 \n"
100 "xorps %%xmm7, %%xmm0 \n"
101 "movaps %%xmm1, (%3,%1) \n"
102 "movaps %%xmm0, (%2,%0) \n"
107 :"r"(output+n4), "r"(output+n4*3)
108 XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm7")