mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-30 03:12:08 +00:00
129 lines
4.3 KiB
C
129 lines
4.3 KiB
C
/*
|
|
* 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 "libavutil/x86_cpu.h"
|
|
#include "libavcodec/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 j;
|
|
x86_reg i;
|
|
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");
|
|
}
|