hey i am testing a buf for a string



this allows anywhere from 1-4 bytes for dword 1-2 for word and etc

if you specify more than the allowed bytes for specified size, it will give you 'value out of range'

why when i try with qword

does it give me 'invalid size of operand' ?

With "use16"/"use32" it won't work, because there's not such instruction.

And with "use64" it won't work too, because AMD64 allows only signed 32-bit immediates to be used in 64-bit instructions.

You can do this:

Although it may get frustrating if you want some math done on that. Then you must choose the order in which you compare very carefully. For equality this should do the trick. Or use MMX (64bit) or SSE (128bit) instructions. BUT you must remember that 128bit comparison is NOT possible even in this case (read: possible with tricks involved).