| /* |
| * FFT/MDCT transform with Extended 3DNow! optimizations |
| * Copyright (c) 2006-2008 Zuxy MENG Jie, 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" |
| |
| DECLARE_ALIGNED_8(static const int, m1m1[2]) = { 1<<31, 1<<31 }; |
| |
| #ifdef EMULATE_3DNOWEXT |
| #define PSWAPD(s,d)\ |
| "movq "#s","#d"\n"\ |
| "psrlq $32,"#d"\n"\ |
| "punpckldq "#s","#d"\n" |
| #define ff_fft_calc_3dn2 ff_fft_calc_3dn |
| #define ff_fft_dispatch_3dn2 ff_fft_dispatch_3dn |
| #define ff_fft_dispatch_interleave_3dn2 ff_fft_dispatch_interleave_3dn |
| #define ff_imdct_calc_3dn2 ff_imdct_calc_3dn |
| #define ff_imdct_half_3dn2 ff_imdct_half_3dn |
| #else |
| #define PSWAPD(s,d) "pswapd "#s","#d"\n" |
| #endif |
| |
| void ff_fft_dispatch_3dn2(FFTComplex *z, int nbits); |
| void ff_fft_dispatch_interleave_3dn2(FFTComplex *z, int nbits); |
| |
| void ff_fft_calc_3dn2(FFTContext *s, FFTComplex *z) |
| { |
| int n = 1<<s->nbits; |
| int i; |
| ff_fft_dispatch_interleave_3dn2(z, s->nbits); |
| __asm__ volatile("femms"); |
| if(n <= 8) |
| for(i=0; i<n; i+=2) |
| FFSWAP(FFTSample, z[i].im, z[i+1].re); |
| } |
| |
| void ff_imdct_half_3dn2(MDCTContext *s, FFTSample *output, const FFTSample *input) |
| { |
| x86_reg j, k; |
| long n = 1 << s->nbits; |
| long n2 = n >> 1; |
| long n4 = n >> 2; |
| long n8 = n >> 3; |
| const uint16_t *revtab = s->fft.revtab; |
| const FFTSample *tcos = s->tcos; |
| const FFTSample *tsin = s->tsin; |
| const FFTSample *in1, *in2; |
| FFTComplex *z = (FFTComplex *)output; |
| |
| /* pre rotation */ |
| in1 = input; |
| in2 = input + n2 - 1; |
| #ifdef EMULATE_3DNOWEXT |
| __asm__ volatile("movd %0, %%mm7" ::"r"(1<<31)); |
| #endif |
| for(k = 0; k < n4; k++) { |
| // FIXME a single block is faster, but gcc 2.95 and 3.4.x on 32bit can't compile it |
| __asm__ volatile( |
| "movd %0, %%mm0 \n" |
| "movd %2, %%mm1 \n" |
| "punpckldq %1, %%mm0 \n" |
| "punpckldq %3, %%mm1 \n" |
| "movq %%mm0, %%mm2 \n" |
| PSWAPD( %%mm1, %%mm3 ) |
| "pfmul %%mm1, %%mm0 \n" |
| "pfmul %%mm3, %%mm2 \n" |
| #ifdef EMULATE_3DNOWEXT |
| "movq %%mm0, %%mm1 \n" |
| "punpckhdq %%mm2, %%mm0 \n" |
| "punpckldq %%mm2, %%mm1 \n" |
| "pxor %%mm7, %%mm0 \n" |
| "pfadd %%mm1, %%mm0 \n" |
| #else |
| "pfpnacc %%mm2, %%mm0 \n" |
| #endif |
| ::"m"(in2[-2*k]), "m"(in1[2*k]), |
| "m"(tcos[k]), "m"(tsin[k]) |
| ); |
| __asm__ volatile( |
| "movq %%mm0, %0 \n\t" |
| :"=m"(z[revtab[k]]) |
| ); |
| } |
| |
| ff_fft_dispatch_3dn2(z, s->fft.nbits); |
| |
| #define CMUL(j,mm0,mm1)\ |
| "movq (%2,"#j",2), %%mm6 \n"\ |
| "movq 8(%2,"#j",2), "#mm0"\n"\ |
| "movq %%mm6, "#mm1"\n"\ |
| "movq "#mm0",%%mm7 \n"\ |
| "pfmul (%3,"#j"), %%mm6 \n"\ |
| "pfmul (%4,"#j"), "#mm0"\n"\ |
| "pfmul (%4,"#j"), "#mm1"\n"\ |
| "pfmul (%3,"#j"), %%mm7 \n"\ |
| "pfsub %%mm6, "#mm0"\n"\ |
| "pfadd %%mm7, "#mm1"\n" |
| |
| /* post rotation */ |
| j = -n2; |
| k = n2-8; |
| __asm__ volatile( |
| "1: \n" |
| CMUL(%0, %%mm0, %%mm1) |
| CMUL(%1, %%mm2, %%mm3) |
| "movd %%mm0, (%2,%0,2) \n" |
| "movd %%mm1,12(%2,%1,2) \n" |
| "movd %%mm2, (%2,%1,2) \n" |
| "movd %%mm3,12(%2,%0,2) \n" |
| "psrlq $32, %%mm0 \n" |
| "psrlq $32, %%mm1 \n" |
| "psrlq $32, %%mm2 \n" |
| "psrlq $32, %%mm3 \n" |
| "movd %%mm0, 8(%2,%0,2) \n" |
| "movd %%mm1, 4(%2,%1,2) \n" |
| "movd %%mm2, 8(%2,%1,2) \n" |
| "movd %%mm3, 4(%2,%0,2) \n" |
| "sub $8, %1 \n" |
| "add $8, %0 \n" |
| "jl 1b \n" |
| :"+r"(j), "+r"(k) |
| :"r"(z+n8), "r"(tcos+n8), "r"(tsin+n8) |
| :"memory" |
| ); |
| __asm__ volatile("femms"); |
| } |
| |
| void ff_imdct_calc_3dn2(MDCTContext *s, FFTSample *output, const FFTSample *input) |
| { |
| x86_reg j, k; |
| long n = 1 << s->nbits; |
| long n4 = n >> 2; |
| |
| ff_imdct_half_3dn2(s, output+n4, input); |
| |
| j = -n; |
| k = n-8; |
| __asm__ volatile( |
| "movq %4, %%mm7 \n" |
| "1: \n" |
| PSWAPD((%2,%1), %%mm0) |
| PSWAPD((%3,%0), %%mm1) |
| "pxor %%mm7, %%mm0 \n" |
| "movq %%mm1, (%3,%1) \n" |
| "movq %%mm0, (%2,%0) \n" |
| "sub $8, %1 \n" |
| "add $8, %0 \n" |
| "jl 1b \n" |
| :"+r"(j), "+r"(k) |
| :"r"(output+n4), "r"(output+n4*3), |
| "m"(*m1m1) |
| ); |
| __asm__ volatile("femms"); |
| } |
| |