/*
	This C language subroutine copies range of memory
	into another without overlap problems.
	
	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 *memmove(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	    ___memmoveDP;

___memmoveDP:	
move_core:	R2=PASS R12, dm_ptr=R4;	/*Test for 0 length, point to input*/

		IF EQ JUMP (PC, restore_state) (DB);
		R0=PASS R4, pm_ptr=R8;		/*Point to output*/
		R2=R2-1, R1=PM(pm_ptr,pm_1);	/*preread	*/

		LCNTR=R2, DO dm_pm UNTIL LCE;	/*Loop n-1 times*/
dm_pm:		    DM(dm_ptr,dm_1)=R1, R1=PM(pm_ptr,pm_1);

restore_state:	FETCH_RETURN
		DM(dm_ptr,dm_1)=R1;		/*post write	*/
		RETURN (DB);
		RESTORE_STACK
		RESTORE_FRAME

.ENDSEG;