>-----Original Message-----
>From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] 
>Sent: 25 May 2005 14:32
>To: 'Microcontroller discussion list - Public.'
>Subject: RE: [PIC] skpz, skpnz, etc: What are these?
>
>
>> You can't (can't can't can't)(mustn't) use these 
>pseudoinstructions as 
>> follows:
>>
>> btfss   BOB, thumb
>> skpz   RALPH
>> ....
>
>AFAIK skpz is a one-instruction 'macro' (that does not take 
>any parameters), so I see no problem in using it. I do share 
>your objection to multiple-instruction macro's that look like 
>instructions.
>
>Challenge (intermediate): write a JUMP <LABEL> macro for the 
>14-bit core PICs that jumps to the target address. The macro 
>must handle code paging, hence it will in general expand to 
>more than one instruction. When preceded by a skip instruction 
>(for instance btfss or skpz) the JUMP macro must behave as a 
>naive user would expect: the jump must not be taken, execution 
>must proceed with the instruction after the JUMP.

Something like this would work I suppose.

JUMP macro addr
    LOCAL startjump
    LOCAL endjump
    goto  startjump
    goto  endjump
startjump:
    movlw HIGH addr
    movwf PCLATH
    goto  addr
endjump:
	endm

It would be neater if you could conditionaly add the two gotos depending
on if the previous instruction was a "skip" instruction.  I'm not an
MPASM guru so I don't know if that can be done?

Regards

Mike

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