On Wed, 23 Jan 2002 11:03:38 -0500, Ted Mawson wrote:

>Hi guys,
>
>
>
>Quick question on .asm syntax using decfsz.  What's the difference
>between the two following examples please?
>
>
>
>assume 'count' is a variable
>
>
>
>loop      code
>
>            code
>
>            decfsz count, F
>
>            goto loop
>
>            retlw
>
>
>
>loop      code
>
>            code
>
>            decfsz count, 1
>
>            goto loop
>
>            retlw
>
>
>
>I understand that decfsz is decrementing count and if count=3D0 after =
the
>decrement, the next 'goto loop' instruction is skipped.  I see the two
>forms used all over the place and the second one makes more sense to me,
>it's the use of the 'F' that's puzzling me and I haven't found any
>reference (yet) to what it is.
>
>

=46unctionally they're identical. The 'F' indicates that the result goes
to the register and not to the W register.=20

=46 and W are defined in the processor include file ( F equ 1, W equ 0).

(Note that if you use "decfsz count, W", the register will not
decrement and the code will loop forever if the count is non-zero.)

Regards, Bob

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