| /* |
| * FFT/MDCT transform with SSE optimizations |
| * Copyright (c) 2008 Loren Merritt |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavutil/x86_cpu.h" |
| #include "libavcodec/dsputil.h" |
| #include "fft.h" |
| #include "config.h" |
| |
| DECLARE_ASM_CONST(16, unsigned int, ff_m1m1m1m1)[4] = |
| { 1U << 31, 1U << 31, 1U << 31, 1U << 31 }; |
| |
| void ff_fft_dispatch_sse(FFTComplex *z, int nbits); |
| void ff_fft_dispatch_interleave_sse(FFTComplex *z, int nbits); |
| void ff_fft_dispatch_interleave_avx(FFTComplex *z, int nbits); |
| |
| #if HAVE_AVX |
| void ff_fft_calc_avx(FFTContext *s, FFTComplex *z) |
| { |
| ff_fft_dispatch_interleave_avx(z, s->nbits); |
| } |
| #endif |
| |
| void ff_fft_calc_sse(FFTContext *s, FFTComplex *z) |
| { |
| int n = 1 << s->nbits; |
| |
| ff_fft_dispatch_interleave_sse(z, s->nbits); |
| |
| if(n <= 16) { |
| x86_reg i = -8*n; |
| __asm__ volatile( |
| "1: \n" |
| "movaps (%0,%1), %%xmm0 \n" |
| "movaps %%xmm0, %%xmm1 \n" |
| "unpcklps 16(%0,%1), %%xmm0 \n" |
| "unpckhps 16(%0,%1), %%xmm1 \n" |
| "movaps %%xmm0, (%0,%1) \n" |
| "movaps %%xmm1, 16(%0,%1) \n" |
| "add $32, %0 \n" |
| "jl 1b \n" |
| :"+r"(i) |
| :"r"(z+n) |
| :"memory" |
| ); |
| } |
| } |
| |
| void ff_fft_permute_sse(FFTContext *s, FFTComplex *z) |
| { |
| int n = 1 << s->nbits; |
| int i; |
| for(i=0; i<n; i+=2) { |
| __asm__ volatile( |
| "movaps %2, %%xmm0 \n" |
| "movlps %%xmm0, %0 \n" |
| "movhps %%xmm0, %1 \n" |
| :"=m"(s->tmp_buf[s->revtab[i]]), |
| "=m"(s->tmp_buf[s->revtab[i+1]]) |
| :"m"(z[i]) |
| ); |
| } |
| memcpy(z, s->tmp_buf, n*sizeof(FFTComplex)); |
| } |
| |
| void ff_imdct_calc_sse(FFTContext *s, FFTSample *output, const FFTSample *input) |
| { |
| x86_reg j, k; |
| long n = s->mdct_size; |
| long n4 = n >> 2; |
| |
| s->imdct_half(s, output + n4, input); |
| |
| j = -n; |
| k = n-16; |
| __asm__ volatile( |
| "movaps "MANGLE(ff_m1m1m1m1)", %%xmm7 \n" |
| "1: \n" |
| "movaps (%2,%1), %%xmm0 \n" |
| "movaps (%3,%0), %%xmm1 \n" |
| "shufps $0x1b, %%xmm0, %%xmm0 \n" |
| "shufps $0x1b, %%xmm1, %%xmm1 \n" |
| "xorps %%xmm7, %%xmm0 \n" |
| "movaps %%xmm1, (%3,%1) \n" |
| "movaps %%xmm0, (%2,%0) \n" |
| "sub $16, %1 \n" |
| "add $16, %0 \n" |
| "jl 1b \n" |
| :"+r"(j), "+r"(k) |
| :"r"(output+n4), "r"(output+n4*3) |
| XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm7") |
| ); |
| } |
| |