diff options
Diffstat (limited to 'libavcodec/x86/fft_3dn2.c')
| -rw-r--r-- | libavcodec/x86/fft_3dn2.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/libavcodec/x86/fft_3dn2.c b/libavcodec/x86/fft_3dn2.c new file mode 100644 index 0000000000..1f30edc99d --- /dev/null +++ b/libavcodec/x86/fft_3dn2.c @@ -0,0 +1,173 @@ +/* + * 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"); +} + |