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/*
* 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 */
}
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