NASM Forum > Using NASM
Make NASM print warning when operands aren't of same size.
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niccolo:
Look at the following code:
--- Code: --- segment .text
mov eax, x
mov ebx, y
...
segment .data
x DW 10
y DW 1
--- End code ---
It has a bug: 'x' and 'y' are defined with 'dw' (16 bits) instead of 'dd' (32 bits). And they're assigned to 32 bits registers.
How can I make NASM print a warning in this case? If it's not possible, is there some way to guard against such bugs?
I've run nasm with the '-w+all' command line option, but it prints no warning.
(I'm new to Assembly.)
niccolo:
Oh my, I've found the following in the manual:
--- Quote --- 2.2.3 NASM Doesn't Store Variable Types
NASM, by design, chooses not to remember the types of variables you declare.
--- End quote ---
So I guess that's it.
(Anyway, if anybody has tips on how not to trip on this, I'm all ears.)
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