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3ab9a2a557
This prevents having to sign-extend on 64-bit systems with 32-bit ints, such as x86-64. Also fixes crashes on systems where we don't do it and arguments are not in registers, such as Win64 for all weight functions.
46 lines
1.6 KiB
C
46 lines
1.6 KiB
C
/*
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* RV30/40 MMX/SSE2 optimizations
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* Copyright (C) 2012 Christophe Gisquet <christophe.gisquet@gmail.com>
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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 "libavutil/cpu.h"
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#include "libavutil/x86_cpu.h"
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#include "libavcodec/dsputil.h"
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#include "libavcodec/rv34dsp.h"
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void ff_rv34_idct_dc_mmx2(DCTELEM *block);
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void ff_rv34_idct_dc_noround_mmx2(DCTELEM *block);
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void ff_rv34_idct_dc_add_mmx(uint8_t *dst, ptrdiff_t stride, int dc);
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void ff_rv34_idct_dc_add_sse4(uint8_t *dst, ptrdiff_t stride, int dc);
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av_cold void ff_rv34dsp_init_x86(RV34DSPContext* c, DSPContext *dsp)
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{
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#if HAVE_YASM
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int mm_flags = av_get_cpu_flags();
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if (mm_flags & AV_CPU_FLAG_MMX)
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c->rv34_idct_dc_add = ff_rv34_idct_dc_add_mmx;
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if (mm_flags & AV_CPU_FLAG_MMX2) {
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c->rv34_inv_transform_dc = ff_rv34_idct_dc_noround_mmx2;
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}
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if (mm_flags & AV_CPU_FLAG_SSE4)
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c->rv34_idct_dc_add = ff_rv34_idct_dc_add_sse4;
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#endif
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}
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