2 * Copyright (c) 2007 Luca Barbato <lu_zero@gentoo.org>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 ** @file int_altivec.c
28 #include "gcc_fixes.h"
30 #include "dsputil_altivec.h"
32 static int ssd_int8_vs_int16_altivec(const int8_t *pix1, const int16_t *pix2,
35 vector signed char vpix1;
36 vector signed short vpix2, vdiff, vpix1l,vpix1h;
37 union { vector signed int vscore;
40 u.vscore = vec_splat_s32(0);
42 //XXX lazy way, fix it later
44 #define vec_unaligned_load(b) \
45 vec_perm(vec_ld(0,b),vec_ld(15,b),vec_lvsl(0, b));
49 // score += (pix1[i]-pix2[i])*(pix1[i]-pix2[i]);
50 //load pix1 and the first batch of pix2
52 vpix1 = vec_unaligned_load(pix1);
53 vpix2 = vec_unaligned_load(pix2);
56 vpix1h = vec_unpackh(vpix1);
57 vdiff = vec_sub(vpix1h, vpix2);
58 vpix1l = vec_unpackl(vpix1);
59 // load another batch from pix2
60 vpix2 = vec_unaligned_load(pix2);
61 u.vscore = vec_msum(vdiff, vdiff, u.vscore);
62 vdiff = vec_sub(vpix1l, vpix2);
63 u.vscore = vec_msum(vdiff, vdiff, u.vscore);
68 u.vscore = vec_sums(u.vscore, vec_splat_s32(0));
71 for (i = 0; i < size; i++) {
72 u.score[3] += (pix1[i]-pix2[i])*(pix1[i]-pix2[i]);
77 void int_init_altivec(DSPContext* c, AVCodecContext *avctx)
79 c->ssd_int8_vs_int16 = ssd_int8_vs_int16_altivec;