Vasm division by 0

Quagliarulo · 27 July 2020, 00:13

Hello. Why is this? What should I do?

Code:

	SECTION	SOMETHING,CODE
	
	move.l	#(franco-ciccio),d0		; moveq #6,d0
	move.l	#(12/6),d0			; moveq #2,d0
	move.l	#(12/(franco-ciccio)),d0	; vasm says division by 0
	rts
ciccio
	dc.b 0,1,2,3,4,5
franco
	end

Hedeon · 27 July 2020, 01:43

I think it is resolved in the second pass of the assembler.

So I think you should

something EQU franco-ciccio

and then move.l #(12/something),d0

Other ppl will probably know better :-)

phx · 27 July 2020, 01:48

Quote:

Originally Posted by Quagliarulo

Why is this?

The symbols franco and ciccio are unknown during the first pass, so they evaluate to zero.
I would call it a bug. Never noticed that before. Thanks for reporting! Division by zero errors shouldn't be allowed before the final pass. Will fix that.

Quote:

What should I do?

Wait for the fix. Or define a third symbol

xyz equ 12/(franco-ciccio)

below franco and use that instead.

EDIT: Hedeon was faster.

phx · 27 July 2020, 11:16

Fixed. Errors during expression evalulation should not show up before the final pass!

Please try tomorrow's daily source snapshot or wait for the next release.

Hedeon · 27 July 2020, 11:30

Quote:

Originally Posted by phx

Fixed. Errors during expression evaluation should not show up before the final pass!

Please try tomorrow's daily source snapshot or wait for the next release.

Nice. I thought this was working as intended and taught myself to EQU stuff at the start.

27 July 2020, 00:13	#1
Quagliarulo Registered User Join Date: Mar 2010 Location: Napoli, Italia Posts: 76	Vasm division by 0 Hello. Why is this? What should I do? Code: SECTION SOMETHING,CODE move.l #(franco-ciccio),d0 ; moveq #6,d0 move.l #(12/6),d0 ; moveq #2,d0 move.l #(12/(franco-ciccio)),d0 ; vasm says division by 0 rts ciccio dc.b 0,1,2,3,4,5 franco end

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27 July 2020, 01:43	#2
Hedeon Semi-Retired Join Date: Mar 2012 Location: Leiden / The Netherlands Posts: 1,993	I think it is resolved in the second pass of the assembler. So I think you should something EQU franco-ciccio and then move.l #(12/something),d0 Other ppl will probably know better :-)

27 July 2020, 11:16	#4
phx Natteravn Join Date: Nov 2009 Location: Herford / Germany Posts: 2,496	Fixed. Errors during expression evalulation should not show up before the final pass! Please try tomorrow's daily source snapshot or wait for the next release.

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