/* * FFT/MDCT transform with Extended 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_3dn2(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" "pswapd %%mm5, %%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 (%3,%0,2), %%mm4 \n\t" "movq 8(%3,%0,2), %%mm5 \n\t" "pswapd %%mm4, %%mm6 \n\t" // no need for cptr[2] & cptr[3] "pswapd %%mm5, %%mm7 \n\t" "pfmul %%mm2, %%mm4 \n\t" // cre*re cim*im "pfmul %%mm3, %%mm5 \n\t" "pfmul %%mm2, %%mm6 \n\t" // cim*re cre*im "pfmul %%mm3, %%mm7 \n\t" "pfpnacc %%mm6, %%mm4 \n\t" // cre*re-cim*im cim*re+cre*im "pfpnacc %%mm7, %%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"); } void ff_imdct_calc_3dn2(MDCTContext *s, FFTSample *output, const FFTSample *input, FFTSample *tmp) { long k, n8, n4, n2, n; const uint16_t *revtab = s->fft.revtab; const FFTSample *tcos = s->tcos; const FFTSample *tsin = s->tsin; const FFTSample *in1, *in2; FFTComplex *z = (FFTComplex *)tmp; n = 1 << s->nbits; n2 = n >> 1; n4 = n >> 2; n8 = n >> 3; /* pre rotation */ in1 = input; in2 = input + n2 - 1; 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\t" "movd %2, %%mm1 \n\t" "punpckldq %1, %%mm0 \n\t" "punpckldq %3, %%mm1 \n\t" "movq %%mm0, %%mm2 \n\t" "pfmul %%mm1, %%mm0 \n\t" "pswapd %%mm1, %%mm1 \n\t" "pfmul %%mm1, %%mm2 \n\t" "pfpnacc %%mm2, %%mm0 \n\t" ::"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_calc(&s->fft, z); /* post rotation + reordering */ for(k = 0; k < n4; k++) { asm volatile( "movq %0, %%mm0 \n\t" "movd %1, %%mm1 \n\t" "punpckldq %2, %%mm1 \n\t" "movq %%mm0, %%mm2 \n\t" "pfmul %%mm1, %%mm0 \n\t" "pswapd %%mm1, %%mm1 \n\t" "pfmul %%mm1, %%mm2 \n\t" "pfpnacc %%mm2, %%mm0 \n\t" "movq %%mm0, %0 \n\t" :"+m"(z[k]) :"m"(tcos[k]), "m"(tsin[k]) ); } k = n-8; asm volatile("movd %0, %%mm7" ::"r"(1<<31)); asm volatile( "1: \n\t" "movq (%4,%0), %%mm0 \n\t" // z[n8+k] "neg %0 \n\t" "pswapd -8(%4,%0), %%mm1 \n\t" // z[n8-1-k] "movq %%mm0, %%mm2 \n\t" "pxor %%mm7, %%mm2 \n\t" "punpckldq %%mm1, %%mm2 \n\t" "pswapd %%mm2, %%mm3 \n\t" "punpckhdq %%mm1, %%mm0 \n\t" "pswapd %%mm0, %%mm4 \n\t" "pxor %%mm7, %%mm0 \n\t" "pxor %%mm7, %%mm4 \n\t" "movq %%mm3, -8(%3,%0) \n\t" // output[n-2-2*k] = { z[n8-1-k].im, -z[n8+k].re } "movq %%mm4, -8(%2,%0) \n\t" // output[n2-2-2*k]= { -z[n8-1-k].re, z[n8+k].im } "neg %0 \n\t" "movq %%mm0, (%1,%0) \n\t" // output[2*k] = { -z[n8+k].im, z[n8-1-k].re } "movq %%mm2, (%2,%0) \n\t" // output[n2+2*k] = { -z[n8+k].re, z[n8-1-k].im } "sub $8, %0 \n\t" "jge 1b \n\t" :"+r"(k) :"r"(output), "r"(output+n2), "r"(output+n), "r"(z+n8) :"memory" ); asm volatile("femms"); }