sad_altivec.c

wince下的xvidcore开发库,可用于MP4等视频播放开发

 /*
 
     Copyright (C) 2002 Benjamin Herrenschmidt <[e-mail]>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
 
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
     along with this program; if not, write to the Free Software
     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 
     $Id: sad_altivec.c,v 1.1 2005/07/21 09:08:51 klschoef Exp $
     $Source: /cvsroot/vitooki/vitooki/3rdparty/wince/xvidcore-1.0.0-rc1/src/motion/ppc_asm/sad_altivec.c,v $
     $Date: 2005/07/21 09:08:51 $
     $Author: klschoef $
 
 */
 
 #define G_REG
 
 #ifdef G_REG
 register vector unsigned char perm0 asm("%v29");
 register vector unsigned char perm1 asm("%v30");
 register vector unsigned int zerovec asm("%v31");
 #endif
 
 #include <stdio.h>
 
 #undef DEBUG
 
 static const vector unsigned char perms[2] = {
         (vector unsigned char) (        /* Used when cur is aligned */
                                                            0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
                                                            0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17),
         (vector unsigned char) (        /* Used when cur is unaligned */
                                                            0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
                                                            0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f),
 };
 
 #ifdef G_REG
 void
 sadInit_altivec(void)
 {
         perm0 = perms[0];
         perm1 = perms[1];
         zerovec = (vector unsigned int) (0);
 }
 static inline const vector