1/* 2 * Copyright (c) 2002 Brian Foley 3 * Copyright (c) 2002 Dieter Shirley 4 * Copyright (c) 2003-2004 Romain Dolbeau <romain@dolbeau.org> 5 * 6 * This file is part of FFmpeg. 7 * 8 * FFmpeg is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * FFmpeg is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23#include "config.h" 24#if HAVE_ALTIVEC_H 25#include <altivec.h> 26#endif 27 28#include "libavutil/attributes.h" 29#include "libavutil/cpu.h" 30#include "libavutil/ppc/cpu.h" 31#include "libavutil/ppc/types_altivec.h" 32#include "libavutil/ppc/util_altivec.h" 33#include "libavcodec/huffyuvdsp.h" 34 35#if HAVE_ALTIVEC 36static void add_bytes_altivec(uint8_t *dst, uint8_t *src, intptr_t w) 37{ 38 register int i; 39 register vector unsigned char vdst, vsrc; 40 41 /* dst and src are 16 bytes-aligned (guaranteed). */ 42 for (i = 0; i + 15 < w; i += 16) { 43 vdst = vec_ld(i, (unsigned char *) dst); 44 vsrc = vec_ld(i, (unsigned char *) src); 45 vdst = vec_add(vsrc, vdst); 46 vec_st(vdst, i, (unsigned char *) dst); 47 } 48 /* If w is not a multiple of 16. */ 49 for (; i < w; i++) 50 dst[i] = src[i]; 51} 52#endif /* HAVE_ALTIVEC */ 53 54av_cold void ff_huffyuvdsp_init_ppc(HuffYUVDSPContext *c) 55{ 56#if HAVE_ALTIVEC 57 if (!PPC_ALTIVEC(av_get_cpu_flags())) 58 return; 59 60 c->add_bytes = add_bytes_altivec; 61#endif /* HAVE_ALTIVEC */ 62} 63