mirror of
https://github.com/FFmpeg/FFmpeg.git
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63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
/*
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* Copyright (c) 2002 Brian Foley
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* Copyright (c) 2002 Dieter Shirley
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* Copyright (c) 2003-2004 Romain Dolbeau <romain@dolbeau.org>
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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 "config.h"
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#if HAVE_ALTIVEC_H
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#include <altivec.h>
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#endif
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#include "libavutil/attributes.h"
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#include "libavutil/cpu.h"
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#include "libavutil/ppc/cpu.h"
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#include "libavutil/ppc/types_altivec.h"
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#include "libavutil/ppc/util_altivec.h"
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#include "libavcodec/lossless_videodsp.h"
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#if HAVE_ALTIVEC
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static void add_bytes_altivec(uint8_t *dst, uint8_t *src, intptr_t w)
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{
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register int i;
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register vector unsigned char vdst, vsrc;
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/* dst and src are 16 bytes-aligned (guaranteed). */
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for (i = 0; i + 15 < w; i += 16) {
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vdst = vec_ld(i, (unsigned char *) dst);
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vsrc = vec_ld(i, (unsigned char *) src);
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vdst = vec_add(vsrc, vdst);
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vec_st(vdst, i, (unsigned char *) dst);
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}
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/* If w is not a multiple of 16. */
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for (; i < w; i++)
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dst[i] = src[i];
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}
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#endif /* HAVE_ALTIVEC */
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av_cold void ff_llviddsp_init_ppc(LLVidDSPContext *c)
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{
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#if HAVE_ALTIVEC
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if (!PPC_ALTIVEC(av_get_cpu_flags()))
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return;
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c->add_bytes = add_bytes_altivec;
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#endif /* HAVE_ALTIVEC */
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}
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