Macro arguments in the calculations

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hidden

Joined: 14 Feb 2007
Posts: 49

hidden 14 Feb 2007, 20:20

While I was typing my program, I discovered this situation. FASM macroprocesso doesn't separate arguments and apply to them usual operator's priority.

macro _db v { db v and 0FFh }

_db 0FFFh + 0 ; db 0FFFh + (0 and 0FFh)

That what I've done to all my calculations inside macro blocks.

macro _db v { db (v) and 0FFh }

_db 0FFFh + 0 ; db (0FFFh + 0) and 0FFh

It's not a bug, but may be useful in the manual.

PS Thx, it's the best assembler I've ever seen Smile

PPS I would like to see in future version possibility to add debug information to the (PE)executable files.

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14 Feb 2007, 20:20

Borsuc

Joined: 29 Dec 2005
Posts: 2465
Location: Bucharest, Romania

Borsuc 16 Feb 2007, 17:13

Hi

Macroprocessor doesn't apply operator priority, it just replaces the parameters with the given text Wink

and it isn't supposed to make things unexpectedly like prioritying the operators

16 Feb 2007, 17:13

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 16 Feb 2007, 22:15

hidden: if you read manual carefully, you will see that macro does just textual substition. then, it is clear that:

Code:

macro _db v { db v and 0FFh }
_db 0FFFh + 0 ;

becomes

Code:

db 0FFFh + 0 and 0FFh

and

Code:

macro _db v { db (v) and 0FFh } 
_db 0FFFh + 0

becomes

Code:

db (0FFFh+0) and 0FFh

16 Feb 2007, 22:15

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