strcpy.s

2440下使用汇编语言实现的字符串拷贝功能。

		AREA		EXAMPLE1,CODE,READONLY
		
		ENTRY	
		
		CODE32
		
START	MOV 		R1,#0x1000

		MOV 		R2,#0x2000
		
LOOP	LDR			R3,[R1],#4

		MOV			R4,#0x0
		
		MOV 		R5,R3
		
ROUTE	AND			R6,R5,#0xFF

		CMP			R6,#0x0
		
		BEQ			OVER
		
		MOV  		R5,R5,LSR#0x8
		
		ADD			R4,R4,#0x1
		
		CMP 		R4,#0X4
		
		BEQ			COPY
		
		BNE			ROUTE
		
COPY	STR			R3,[R2],#4

		B			LOOP
		
OVER	STR			R3,[R2]

		END