XORLW or XORWF

[Suraj143]

Hi everybody I have a small question to ask.

I have saved a value in a temporary register called TEMP.
Actually I don’t know that value.
After a long time after PIC doing some other work I want to read that saved value.

Here I have two codes. What code do I have to use?

	movwf	TEMP	;move the value from temparary register
	xorlw	04H	;compare with a known value
	btfsc	STATUS,Z
	goto	OUTPUT

	movlw	04H	;move a known value to W
	xorwf	TEMP,w	;compare the value with TEMP
	btfsc	STATUS,Z
	goto	OUTPUT

 

[Pommie]

They both do the same thing.

Mike.

 

[eblc1388]

	movwf	TEMP	;move the value from temparary register

You need to be careful. The above instruction moves whatever value in W into TEMP register and destroy the value inside TEMP.

Use MOVF TEMP,W to get the TEMP value into W instead.