mirror of https://git.ffmpeg.org/ffmpeg.git
104 lines
3.6 KiB
C
104 lines
3.6 KiB
C
/*
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* Copyright (C) 2006 Loren Merritt <lorenm@u.washington.edu>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include "libavutil/cpu.h"
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#include "libavcodec/vorbisdsp.h"
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#include "dsputil_mmx.h" // for ff_pdw_80000000
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#if HAVE_INLINE_ASM
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#if ARCH_X86_32
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static void vorbis_inverse_coupling_3dnow(float *mag, float *ang,
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intptr_t blocksize)
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{
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int i;
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__asm__ volatile ("pxor %%mm7, %%mm7":);
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for (i = 0; i < blocksize; i += 2) {
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__asm__ volatile (
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"movq %0, %%mm0 \n\t"
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"movq %1, %%mm1 \n\t"
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"movq %%mm0, %%mm2 \n\t"
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"movq %%mm1, %%mm3 \n\t"
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"pfcmpge %%mm7, %%mm2 \n\t" // m <= 0.0
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"pfcmpge %%mm7, %%mm3 \n\t" // a <= 0.0
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"pslld $31, %%mm2 \n\t" // keep only the sign bit
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"pxor %%mm2, %%mm1 \n\t"
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"movq %%mm3, %%mm4 \n\t"
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"pand %%mm1, %%mm3 \n\t"
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"pandn %%mm1, %%mm4 \n\t"
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"pfadd %%mm0, %%mm3 \n\t" // a = m + ((a < 0) & (a ^ sign(m)))
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"pfsub %%mm4, %%mm0 \n\t" // m = m + ((a > 0) & (a ^ sign(m)))
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"movq %%mm3, %1 \n\t"
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"movq %%mm0, %0 \n\t"
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: "+m"(mag[i]), "+m"(ang[i])
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:: "memory"
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);
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}
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__asm__ volatile ("femms");
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}
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#endif
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static void vorbis_inverse_coupling_sse(float *mag, float *ang,
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intptr_t blocksize)
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{
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int i;
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__asm__ volatile (
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"movaps %0, %%xmm5 \n\t"
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:: "m"(ff_pdw_80000000[0])
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);
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for (i = 0; i < blocksize; i += 4) {
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__asm__ volatile (
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"movaps %0, %%xmm0 \n\t"
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"movaps %1, %%xmm1 \n\t"
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"xorps %%xmm2, %%xmm2 \n\t"
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"xorps %%xmm3, %%xmm3 \n\t"
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"cmpleps %%xmm0, %%xmm2 \n\t" // m <= 0.0
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"cmpleps %%xmm1, %%xmm3 \n\t" // a <= 0.0
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"andps %%xmm5, %%xmm2 \n\t" // keep only the sign bit
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"xorps %%xmm2, %%xmm1 \n\t"
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"movaps %%xmm3, %%xmm4 \n\t"
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"andps %%xmm1, %%xmm3 \n\t"
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"andnps %%xmm1, %%xmm4 \n\t"
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"addps %%xmm0, %%xmm3 \n\t" // a = m + ((a < 0) & (a ^ sign(m)))
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"subps %%xmm4, %%xmm0 \n\t" // m = m + ((a > 0) & (a ^ sign(m)))
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"movaps %%xmm3, %1 \n\t"
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"movaps %%xmm0, %0 \n\t"
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: "+m"(mag[i]), "+m"(ang[i])
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:: "memory"
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);
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}
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}
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#endif
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void ff_vorbisdsp_init_x86(VorbisDSPContext *dsp)
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{
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#if HAVE_INLINE_ASM
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int mm_flags = av_get_cpu_flags();
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#if ARCH_X86_32
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if (mm_flags & AV_CPU_FLAG_3DNOW)
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dsp->vorbis_inverse_coupling = vorbis_inverse_coupling_3dnow;
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#endif /* ARCH_X86_32 */
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if (mm_flags & AV_CPU_FLAG_SSE)
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dsp->vorbis_inverse_coupling = vorbis_inverse_coupling_sse;
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#endif /* HAVE_INLINE_ASM */
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}
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