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Index > Macroinstructions > Why .if == doesn't work but .if = works?

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soloworker



Joined: 09 Dec 2020
Posts: 9
soloworker
Hi,

Why the following does not compile?

Code:
.if eax == 2
    NOP
  .else
    NOP
  .endif    


Quote:

c:\fasm\include/macro/if.inc [12] .if [7]:
JNCOND __ELSE,arg
c:\fasm\include/macro/if.inc [98] JNCOND [9]:
match cond,parsed@cond \\{ JNCONDEXPR label,cond \\}
c:\fasm\include/macro/if.inc [98] match [2]:
match cond,parsed@cond \\{ JNCONDEXPR label,cond \\}
c:\fasm\include/macro/if.inc [98] match [0]:
match cond,parsed@cond \\{ JNCONDEXPR label,cond \\}
c:\fasm\include/macro/if.inc [195] JNCONDEXPR [8]:
match ,mod \\\{ JNCONDEL elabel,<cond> \\\}
c:\fasm\include/macro/if.inc [195] match [1]:
match ,mod \\\{ JNCONDEL elabel,<cond> \\\}
c:\fasm\include/macro/if.inc [195] match [0]:
match ,mod \\\{ JNCONDEL elabel,<cond> \\\}
c:\fasm\include/macro/if.inc [307] JNCONDEL [40]:
cmp v1,v2
c:\fasm\include/macro/if.inc [307] match [27]:
cmp v1,v2
c:\fasm\include/macro/if.inc [307] match [1]:
cmp v1,v2
processed: cmp eax,=2
error: invalid operand.





The same one with a single "=" works

Code:
.if eax = 2
    NOP
  .else
    NOP
  .endif    
Post 10 Dec 2020, 03:20
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 18170
Location: In your JS exploiting you and your system
revolution
The macro is only designed to use one equals.

This is not C, Python, etc., so using two equals won't work.
Post 10 Dec 2020, 03:55
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soloworker



Joined: 09 Dec 2020
Posts: 9
soloworker
Great, thanks revolution. I was confused because in MASM it is double equal.
Post 10 Dec 2020, 05:17
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