/*
	This C language subroutine copies one range of 
	memory into another.
	
	The Run Time Library for the C Language.

	Gordon A. Sterling	(617) 461 - 3076
	DSP Development Tools Engineering

	Created on 4/30/90
	Updated on 5/94 by AS
	Updated on 2/95 by AS - separated polymorphic functions

	#include <string.h>					<Header>
	void *memcpy(void *s1, const void *s2, size_t size);	<Prototype>

*/

#include "lib_glob.h"
#include "str_glob.h"

.SEGMENT/CODE	Code_Space_Name;
.FILE 		RTL_FILENAME;

.GLOBAL	    ___memcpyDP;

___memcpyDP:	
copy_core:	R12=PASS R12, dm_ptr=R4;	/*Test for zero input*/
						/*Point to input*/
		IF EQ JUMP (PC, restore_state) (DB);
dm_to_pm_copy:	pm_ptr=R8;			/*Point to output*/
		R12=R12-1, R2=PM(pm_ptr,pm_1);	/*Do prefetch of 1st word*/

		LCNTR=R12, DO dm_pm UNTIL LCE;	/*Loop n times*/
dm_pm:		    DM(dm_ptr,dm_1)=R2, R2=PM(pm_ptr,pm_1);

		DM(dm_ptr,dm_1)=R2;		/*Do post write of last word*/

restore_state:	R0=PASS R4, FETCH_RETURN
		RETURN (DB);
		RESTORE_STACK
		RESTORE_FRAME
.ENDSEG;