mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
78b5c97d3e
This is to avoid split asm sections that attempt to preserve some registers between sections. Originally committed as revision 24869 to svn://svn.ffmpeg.org/ffmpeg/trunk
103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
/*
|
|
* FFT/MDCT transform with SSE optimizations
|
|
* Copyright (c) 2008 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"
|
|
#include "fft.h"
|
|
|
|
DECLARE_ALIGNED(16, static const int, m1m1m1m1)[4] =
|
|
{ 1 << 31, 1 << 31, 1 << 31, 1 << 31 };
|
|
|
|
void ff_fft_dispatch_sse(FFTComplex *z, int nbits);
|
|
void ff_fft_dispatch_interleave_sse(FFTComplex *z, int nbits);
|
|
|
|
void ff_fft_calc_sse(FFTContext *s, FFTComplex *z)
|
|
{
|
|
int n = 1 << s->nbits;
|
|
|
|
ff_fft_dispatch_interleave_sse(z, s->nbits);
|
|
|
|
if(n <= 16) {
|
|
x86_reg i = -8*n;
|
|
__asm__ volatile(
|
|
"1: \n"
|
|
"movaps (%0,%1), %%xmm0 \n"
|
|
"movaps %%xmm0, %%xmm1 \n"
|
|
"unpcklps 16(%0,%1), %%xmm0 \n"
|
|
"unpckhps 16(%0,%1), %%xmm1 \n"
|
|
"movaps %%xmm0, (%0,%1) \n"
|
|
"movaps %%xmm1, 16(%0,%1) \n"
|
|
"add $32, %0 \n"
|
|
"jl 1b \n"
|
|
:"+r"(i)
|
|
:"r"(z+n)
|
|
:"memory"
|
|
);
|
|
}
|
|
}
|
|
|
|
void ff_fft_permute_sse(FFTContext *s, FFTComplex *z)
|
|
{
|
|
int n = 1 << s->nbits;
|
|
int i;
|
|
for(i=0; i<n; i+=2) {
|
|
__asm__ volatile(
|
|
"movaps %2, %%xmm0 \n"
|
|
"movlps %%xmm0, %0 \n"
|
|
"movhps %%xmm0, %1 \n"
|
|
:"=m"(s->tmp_buf[s->revtab[i]]),
|
|
"=m"(s->tmp_buf[s->revtab[i+1]])
|
|
:"m"(z[i])
|
|
);
|
|
}
|
|
memcpy(z, s->tmp_buf, n*sizeof(FFTComplex));
|
|
}
|
|
|
|
void ff_imdct_calc_sse(FFTContext *s, FFTSample *output, const FFTSample *input)
|
|
{
|
|
x86_reg j, k;
|
|
long n = 1 << s->mdct_bits;
|
|
long n4 = n >> 2;
|
|
|
|
ff_imdct_half_sse(s, output+n4, input);
|
|
|
|
j = -n;
|
|
k = n-16;
|
|
__asm__ volatile(
|
|
"movaps %4, %%xmm7 \n"
|
|
"1: \n"
|
|
"movaps (%2,%1), %%xmm0 \n"
|
|
"movaps (%3,%0), %%xmm1 \n"
|
|
"shufps $0x1b, %%xmm0, %%xmm0 \n"
|
|
"shufps $0x1b, %%xmm1, %%xmm1 \n"
|
|
"xorps %%xmm7, %%xmm0 \n"
|
|
"movaps %%xmm1, (%3,%1) \n"
|
|
"movaps %%xmm0, (%2,%0) \n"
|
|
"sub $16, %1 \n"
|
|
"add $16, %0 \n"
|
|
"jl 1b \n"
|
|
:"+r"(j), "+r"(k)
|
|
:"r"(output+n4), "r"(output+n4*3),
|
|
"m"(*m1m1m1m1)
|
|
);
|
|
}
|
|
|