mirror of https://git.ffmpeg.org/ffmpeg.git
211 lines
6.9 KiB
C
211 lines
6.9 KiB
C
/*
|
|
* 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");
|
|
}
|
|
|