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FFmpeg/libavcodec/x86/fft_sse.c
Diego Biurrun 5e528cffcf x86: Add appropriate ifdefs around certain AVX functions.
nasm versions prior to 2.09 have trouble assembling some of our AVX code.
Protect these sections by preprocessor macros to allow compilation to pass.
2011-05-27 21:18:12 +02:00

112 lines
3.1 KiB
C

/*
* FFT/MDCT transform with SSE optimizations
* Copyright (c) 2008 Loren Merritt
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; 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"
#include "config.h"
DECLARE_ASM_CONST(16, int, ff_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_dispatch_interleave_avx(FFTComplex *z, int nbits);
#if HAVE_AVX
void ff_fft_calc_avx(FFTContext *s, FFTComplex *z)
{
ff_fft_dispatch_interleave_avx(z, s->nbits);
}
#endif
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 = s->mdct_size;
long n4 = n >> 2;
s->imdct_half(s, output + n4, input);
j = -n;
k = n-16;
__asm__ volatile(
"movaps "MANGLE(ff_m1m1m1m1)", %%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)
XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm7")
);
}