www.pudn.com > mpeg4_DECORE.rar > clearblock_mmx.c

/************************************************************************** 
 *                                                                        * 
 * This code has been developed by Andrea Graziani. This software is an   * 
 * implementation of a part of one or more MPEG-4 Video tools as          * 
 * specified in ISO/IEC 14496-2 standard.  Those intending to use this    * 
 * software module in hardware or software products are advised that its  * 
 * use may infringe existing patents or copyrights, and any such use      * 
 * would be at such party's own risk.  The original developer of this     * 
 * software module and his/her company, and subsequent editors and their  * 
 * companies (including Project Mayo), will have no liability for use of  * 
 * this software or modifications or derivatives thereof.                 * 
 *                                                                        * 
 * Project Mayo gives users of the Codec a license to this software       * 
 * module or modifications thereof for use in hardware or software        * 
 * products claiming conformance to the MPEG-4 Video Standard as          * 
 * described in the Open DivX license.                                    * 
 *                                                                        * 
 * The complete Open DivX license can be found at                         * 
 * http://www.projectmayo.com/opendivx/license.php                        * 
 *                                                                        * 
 **************************************************************************/ 
/** 
*  Copyright (C) 2001 - Project Mayo 
 * 
 * Andrea Graziani (Ag) 
 * 
 * DivX Advanced Research Center  
* 
**/ 
// clearblock.c // 
 
 
void clearblock (short *psblock) 
{ 
	_asm 
	{ 
		mov		edx, -16 // clear loop counter 
		mov		esi, psblock // capture block address 
 
		pxor  mm0, mm0 // mm0 = 0x00 
lq1:	 
		movq	qword ptr [esi], mm0 // copy output to destination 
		add		esi, 8 
		inc		edx 
		jnz		lq1 
		emms 
	} 
}