diff options
Diffstat (limited to 'src/libffmpeg/libavcodec/i386/fft_3dn.c')
| -rw-r--r-- | src/libffmpeg/libavcodec/i386/fft_3dn.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/src/libffmpeg/libavcodec/i386/fft_3dn.c b/src/libffmpeg/libavcodec/i386/fft_3dn.c new file mode 100644 index 000000000..8087f1932 --- /dev/null +++ b/src/libffmpeg/libavcodec/i386/fft_3dn.c @@ -0,0 +1,125 @@ +/* + * FFT/MDCT transform with 3DNow! optimizations + * Copyright (c) 2006 Zuxy MENG Jie, Loren Merritt + * Based on fft_sse.c copyright (c) 2002 Fabrice Bellard. + * + * 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 "../dsputil.h" + +static const int p1m1[2] __attribute__((aligned(8))) = + { 0, 1 << 31 }; + +static const int m1p1[2] __attribute__((aligned(8))) = + { 1 << 31, 0 }; + +void ff_fft_calc_3dn(FFTContext *s, FFTComplex *z) +{ + int ln = s->nbits; + long i, j; + long nblocks, nloops; + FFTComplex *p, *cptr; + + asm volatile( + /* FEMMS is not a must here but recommended by AMD */ + "femms \n\t" + "movq %0, %%mm7 \n\t" + ::"m"(*(s->inverse ? m1p1 : p1m1)) + ); + + i = 8 << ln; + asm volatile( + "1: \n\t" + "sub $32, %0 \n\t" + "movq (%0,%1), %%mm0 \n\t" + "movq 16(%0,%1), %%mm1 \n\t" + "movq 8(%0,%1), %%mm2 \n\t" + "movq 24(%0,%1), %%mm3 \n\t" + "movq %%mm0, %%mm4 \n\t" + "movq %%mm1, %%mm5 \n\t" + "pfadd %%mm2, %%mm0 \n\t" + "pfadd %%mm3, %%mm1 \n\t" + "pfsub %%mm2, %%mm4 \n\t" + "pfsub %%mm3, %%mm5 \n\t" + "movq %%mm0, %%mm2 \n\t" + "punpckldq %%mm5, %%mm6 \n\t" + "punpckhdq %%mm6, %%mm5 \n\t" + "movq %%mm4, %%mm3 \n\t" + "pxor %%mm7, %%mm5 \n\t" + "pfadd %%mm1, %%mm0 \n\t" + "pfadd %%mm5, %%mm4 \n\t" + "pfsub %%mm1, %%mm2 \n\t" + "pfsub %%mm5, %%mm3 \n\t" + "movq %%mm0, (%0,%1) \n\t" + "movq %%mm4, 8(%0,%1) \n\t" + "movq %%mm2, 16(%0,%1) \n\t" + "movq %%mm3, 24(%0,%1) \n\t" + "jg 1b \n\t" + :"+r"(i) + :"r"(z) + ); + /* pass 2 .. ln-1 */ + + nblocks = 1 << (ln-3); + nloops = 1 << 2; + cptr = s->exptab1; + do { + p = z; + j = nblocks; + do { + i = nloops*8; + asm volatile( + "1: \n\t" + "sub $16, %0 \n\t" + "movq (%1,%0), %%mm0 \n\t" + "movq 8(%1,%0), %%mm1 \n\t" + "movq (%2,%0), %%mm2 \n\t" + "movq 8(%2,%0), %%mm3 \n\t" + "movq %%mm2, %%mm4 \n\t" + "movq %%mm3, %%mm5 \n\t" + "punpckldq %%mm2, %%mm2 \n\t" + "punpckldq %%mm3, %%mm3 \n\t" + "punpckhdq %%mm4, %%mm4 \n\t" + "punpckhdq %%mm5, %%mm5 \n\t" + "pfmul (%3,%0,2), %%mm2 \n\t" // cre*re cim*re + "pfmul 8(%3,%0,2), %%mm3 \n\t" + "pfmul 16(%3,%0,2), %%mm4 \n\t" // -cim*im cre*im + "pfmul 24(%3,%0,2), %%mm5 \n\t" + "pfadd %%mm2, %%mm4 \n\t" // cre*re-cim*im cim*re+cre*im + "pfadd %%mm3, %%mm5 \n\t" + "movq %%mm0, %%mm2 \n\t" + "movq %%mm1, %%mm3 \n\t" + "pfadd %%mm4, %%mm0 \n\t" + "pfadd %%mm5, %%mm1 \n\t" + "pfsub %%mm4, %%mm2 \n\t" + "pfsub %%mm5, %%mm3 \n\t" + "movq %%mm0, (%1,%0) \n\t" + "movq %%mm1, 8(%1,%0) \n\t" + "movq %%mm2, (%2,%0) \n\t" + "movq %%mm3, 8(%2,%0) \n\t" + "jg 1b \n\t" + :"+r"(i) + :"r"(p), "r"(p + nloops), "r"(cptr) + ); + p += nloops*2; + } while (--j); + cptr += nloops*2; + nblocks >>= 1; + nloops <<= 1; + } while (nblocks != 0); + asm volatile("femms"); +} |