WirthAssembly/strcpy at master · cexum/WirthAssembly · GitHub

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000000 41000058	start	MOV	$str1,R1	*store str1 addr in R1
000004 43000068		MOV	$str2,R3	*store str2 addr in R3
000008 f7000001		JMPL	cpychar
00000c e700000c		JMP	end

000010 92100000	cpychar MOVB	0(R1),R2	* str must be pre loaded
000014 b2300000		MOVB	R2,0(R3)	* copy byte over
000018 42290000		SUB	R2,$0,R2
00001c c100000f		JEQ	(R15)		* if terminus, exit function
000020 41180001		ADD	R1,$1,R1	* increment addr
000024 43380001		ADD	R3,$1,R3	* increment addr
000028 e7fffff9		JMP	cpychar		* continue

00002c 92100000	getchar MOVB	0(R1),R2	*str must be pre loaded
000030 42290000		SUB	R2,$0,R2
000034 c100000f		JEQ	(R15)		* if terminus, exit function
000038 41180001		ADD	R1,$1,R1
00003c e7fffffb		JMP	getchar		* continue

000040 40000000	end	MOV	$0,R0
000044 c7000010		SYSCALL

000048 69727473	str0	STRINGZ	'string literal0'
00004c 6c20676e
000050 72657469
000054 00306c61
000058 69727473	str1	STRINGZ	'string literal0'
00005c 6c20676e
000060 72657469
000064 00306c61
000068 706d652a	str2	STRINGZ				*empty
00006c 00007974

                Symbol Table
S 0x000000 start
S 0x000010 cpychar
S 0x00002c getchar
S 0x000040 end
S 0x000048 str0
S 0x000058 str1
S 0x000068 str2