mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
104 lines
3.6 KiB
C
104 lines
3.6 KiB
C
/*
|
|
* Copyright (C) 2006 Loren Merritt <lorenm@u.washington.edu>
|
|
*
|
|
* 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 "config.h"
|
|
#include "libavutil/cpu.h"
|
|
#include "libavcodec/vorbisdsp.h"
|
|
#include "dsputil_mmx.h" // for ff_pdw_80000000
|
|
|
|
#if HAVE_INLINE_ASM
|
|
#if ARCH_X86_32
|
|
static void vorbis_inverse_coupling_3dnow(float *mag, float *ang,
|
|
intptr_t blocksize)
|
|
{
|
|
int i;
|
|
__asm__ volatile ("pxor %%mm7, %%mm7":);
|
|
for (i = 0; i < blocksize; i += 2) {
|
|
__asm__ volatile (
|
|
"movq %0, %%mm0 \n\t"
|
|
"movq %1, %%mm1 \n\t"
|
|
"movq %%mm0, %%mm2 \n\t"
|
|
"movq %%mm1, %%mm3 \n\t"
|
|
"pfcmpge %%mm7, %%mm2 \n\t" // m <= 0.0
|
|
"pfcmpge %%mm7, %%mm3 \n\t" // a <= 0.0
|
|
"pslld $31, %%mm2 \n\t" // keep only the sign bit
|
|
"pxor %%mm2, %%mm1 \n\t"
|
|
"movq %%mm3, %%mm4 \n\t"
|
|
"pand %%mm1, %%mm3 \n\t"
|
|
"pandn %%mm1, %%mm4 \n\t"
|
|
"pfadd %%mm0, %%mm3 \n\t" // a = m + ((a < 0) & (a ^ sign(m)))
|
|
"pfsub %%mm4, %%mm0 \n\t" // m = m + ((a > 0) & (a ^ sign(m)))
|
|
"movq %%mm3, %1 \n\t"
|
|
"movq %%mm0, %0 \n\t"
|
|
: "+m"(mag[i]), "+m"(ang[i])
|
|
:: "memory"
|
|
);
|
|
}
|
|
__asm__ volatile ("femms");
|
|
}
|
|
#endif
|
|
|
|
static void vorbis_inverse_coupling_sse(float *mag, float *ang,
|
|
intptr_t blocksize)
|
|
{
|
|
int i;
|
|
|
|
__asm__ volatile (
|
|
"movaps %0, %%xmm5 \n\t"
|
|
:: "m"(ff_pdw_80000000[0])
|
|
);
|
|
for (i = 0; i < blocksize; i += 4) {
|
|
__asm__ volatile (
|
|
"movaps %0, %%xmm0 \n\t"
|
|
"movaps %1, %%xmm1 \n\t"
|
|
"xorps %%xmm2, %%xmm2 \n\t"
|
|
"xorps %%xmm3, %%xmm3 \n\t"
|
|
"cmpleps %%xmm0, %%xmm2 \n\t" // m <= 0.0
|
|
"cmpleps %%xmm1, %%xmm3 \n\t" // a <= 0.0
|
|
"andps %%xmm5, %%xmm2 \n\t" // keep only the sign bit
|
|
"xorps %%xmm2, %%xmm1 \n\t"
|
|
"movaps %%xmm3, %%xmm4 \n\t"
|
|
"andps %%xmm1, %%xmm3 \n\t"
|
|
"andnps %%xmm1, %%xmm4 \n\t"
|
|
"addps %%xmm0, %%xmm3 \n\t" // a = m + ((a < 0) & (a ^ sign(m)))
|
|
"subps %%xmm4, %%xmm0 \n\t" // m = m + ((a > 0) & (a ^ sign(m)))
|
|
"movaps %%xmm3, %1 \n\t"
|
|
"movaps %%xmm0, %0 \n\t"
|
|
: "+m"(mag[i]), "+m"(ang[i])
|
|
:: "memory"
|
|
);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void ff_vorbisdsp_init_x86(VorbisDSPContext *dsp)
|
|
{
|
|
#if HAVE_INLINE_ASM
|
|
int mm_flags = av_get_cpu_flags();
|
|
|
|
#if ARCH_X86_32
|
|
if (mm_flags & AV_CPU_FLAG_3DNOW)
|
|
dsp->vorbis_inverse_coupling = vorbis_inverse_coupling_3dnow;
|
|
#endif /* ARCH_X86_32 */
|
|
if (mm_flags & AV_CPU_FLAG_SSE)
|
|
dsp->vorbis_inverse_coupling = vorbis_inverse_coupling_sse;
|
|
#endif /* HAVE_INLINE_ASM */
|
|
}
|