FFmpeg: libavutil/ppc/float_dsp_altivec.c Source File

00001 /*
00002  * Copyright (c) 2006 Luca Barbato <lu_zero@gentoo.org>
00003  *
00004  * This file is part of FFmpeg.
00005  *
00006  * FFmpeg is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Lesser General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2.1 of the License, or (at your option) any later version.
00010  *
00011  * FFmpeg is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public
00017  * License along with FFmpeg; if not, write to the Free Software
00018  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00019  */
00020 
00021 #include "util_altivec.h"
00022 #include "float_dsp_altivec.h"
00023 
00024 void ff_vector_fmul_altivec(float *dst, const float *src0, const float *src1,
00025                             int len)
00026 {
00027     int i;
00028     vector float d0, d1, s, zero = (vector float)vec_splat_u32(0);
00029     for (i = 0; i < len - 7; i += 8) {
00030         d0 = vec_ld( 0, src0 + i);
00031         s  = vec_ld( 0, src1 + i);
00032         d1 = vec_ld(16, src0 + i);
00033         d0 = vec_madd(d0, s, zero);
00034         d1 = vec_madd(d1, vec_ld(16, src1 + i), zero);
00035         vec_st(d0,  0, dst + i);
00036         vec_st(d1, 16, dst + i);
00037     }
00038 }