2cdbcc0048
Timings for Arrandale:
C SSE
win32: 2108 334
win64: 1152 322
Factorizing the inner loop with a call/jmp is a >15 cycles cost, even with
the jmp destination being aligned.
Unrolling for ARCH_X86_64 is a 20 cycles gain.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
80 lines
2.8 KiB
C
80 lines
2.8 KiB
C
/*
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* Copyright (c) 2012-2014 Christophe Gisquet <christophe.gisquet@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 "libavutil/attributes.h"
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#include "libavutil/cpu.h"
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#include "libavutil/x86/cpu.h"
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#include "libavcodec/dcadsp.h"
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void ff_int8x8_fmul_int32_sse(float *dst, const int8_t *src, int scale);
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void ff_int8x8_fmul_int32_sse2(float *dst, const int8_t *src, int scale);
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void ff_int8x8_fmul_int32_sse4(float *dst, const int8_t *src, int scale);
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void ff_dca_lfe_fir0_sse(float *out, const float *in, const float *coefs);
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void ff_dca_lfe_fir1_sse(float *out, const float *in, const float *coefs);
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av_cold void ff_dcadsp_init_x86(DCADSPContext *s)
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{
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int cpu_flags = av_get_cpu_flags();
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if (EXTERNAL_SSE(cpu_flags)) {
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#if ARCH_X86_32
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s->int8x8_fmul_int32 = ff_int8x8_fmul_int32_sse;
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#endif
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s->lfe_fir[0] = ff_dca_lfe_fir0_sse;
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s->lfe_fir[1] = ff_dca_lfe_fir1_sse;
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}
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if (EXTERNAL_SSE2(cpu_flags)) {
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s->int8x8_fmul_int32 = ff_int8x8_fmul_int32_sse2;
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}
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if (EXTERNAL_SSE4(cpu_flags)) {
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s->int8x8_fmul_int32 = ff_int8x8_fmul_int32_sse4;
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}
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}
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void ff_synth_filter_inner_sse2(float *synth_buf_ptr, float synth_buf2[32],
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const float window[512],
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float out[32], intptr_t offset, float scale);
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static void synth_filter_sse2(FFTContext *imdct,
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float *synth_buf_ptr, int *synth_buf_offset,
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float synth_buf2[32], const float window[512],
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float out[32], const float in[32], float scale)
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{
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float *synth_buf= synth_buf_ptr + *synth_buf_offset;
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imdct->imdct_half(imdct, synth_buf, in);
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ff_synth_filter_inner_sse2(synth_buf, synth_buf2, window,
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out, *synth_buf_offset, scale);
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*synth_buf_offset= (*synth_buf_offset - 32)&511;
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}
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av_cold void ff_synth_filter_init_x86(SynthFilterContext *s)
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{
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int cpu_flags = av_get_cpu_flags();
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if (EXTERNAL_SSE2(cpu_flags)) {
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s->synth_filter_float = synth_filter_sse2;
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}
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}
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