stosd

[jj2007]

Just for fun :bg

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include \masm32\include\masm32rt.inc

.data
MyDwords dd 123, 456, 789

.code
start: mov edi, offset MyDwords[4]
mov eax, 111
stos MyDwords
MsgBox 0, str$(MyDwords), "Surprise...:", MB_OK
exit
end start


More

[dedndave]

yes - stos, lods, movs, scas, and cmps can all get a size from a label
it can be any appropriately sized label - does not matter if it is the one pointed to by the index regster   :P

[jj2007]

Even this works:

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stos dword ptr GetTickCount
And yes, it's a simple stosd under the hood, mov [edi], eax/add edi, 4 - has nothing to do with GetTickCount.
That can be a cute feature, but on the other hand it's a nightmare to chase a bug caused by a wrong value in edi...

[dedndave]

as i remember, you can do something similar with XLAT
of course, it always wants a byte table   :P

[FORTRANS]

as i remember, you can do something similar with XLAT
of course, it always wants a byte table   :P

Hi,

   Yeah, I tried these "label" tricks out once.  Lasted almost
15 minutrs.  Noted the string opcodes actually tried the
XLAT trick.  Oh well.

Cheers,

Steve N.