mirror of https://github.com/FFmpeg/FFmpeg.git
Originally committed as revision 8706 to svn://svn.ffmpeg.org/ffmpeg/trunkpull/126/head
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/*
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* Copyright (c) 2007 Luca Barbato <lu_zero@gentoo.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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/**
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** @file int_altivec.c |
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** integer misc ops. |
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**/ |
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#include "../dsputil.h" |
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#include "gcc_fixes.h" |
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#include "dsputil_altivec.h" |
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static int ssd_int8_vs_int16_altivec(int8_t *pix1, int16_t *pix2, int size) { |
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int i, size16; |
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vector signed char vpix1; |
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vector signed short vpix2, vdiff, vpix1l,vpix1h; |
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union { vector signed int vscore; |
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int32_t score[4]; |
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} u; |
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u.vscore = vec_splat_s32(0); |
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//
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//XXX lazy way, fix it later
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#define vec_unaligned_load(b) \ |
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vec_perm(vec_ld(0,b),vec_ld(15,b),vec_lvsl(0, b)); |
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size16 = size >> 4; |
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while(size16) { |
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// score += (pix1[i]-pix2[i])*(pix1[i]-pix2[i]);
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//load pix1 and the first batch of pix2
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vpix1 = vec_unaligned_load(pix1); |
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vpix2 = vec_unaligned_load(pix2); |
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pix2 += 8; |
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//unpack
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vpix1h = vec_unpackh(vpix1); |
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vdiff = vec_sub(vpix1h, vpix2); |
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vpix1l = vec_unpackl(vpix1); |
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// load another batch from pix2
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vpix2 = vec_unaligned_load(pix2); |
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u.vscore = vec_msum(vdiff, vdiff, u.vscore); |
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vdiff = vec_sub(vpix1l, vpix2); |
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u.vscore = vec_msum(vdiff, vdiff, u.vscore); |
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pix1 += 16; |
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pix2 += 8; |
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size16--; |
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} |
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u.vscore = vec_sums(u.vscore, vec_splat_s32(0)); |
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size %= 16; |
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for (i = 0; i < size; i++) { |
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u.score[3] += (pix1[i]-pix2[i])*(pix1[i]-pix2[i]); |
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} |
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return u.score[3]; |
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} |
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void int_init_altivec(DSPContext* c, AVCodecContext *avctx) |
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{ |
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c->ssd_int8_vs_int16 = ssd_int8_vs_int16_altivec; |
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} |
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