During a course in computer science one gave me a binary file and the task to find out what it does, using the technique of reverse engineering (i.e. disassemble the file and analyze it). I stumbled upon one line of IA-32 instruction:
add %esi,%ecx
I learned that commands with suffix l operate on 32 bit registers, those with suffix w operate on 16 bit registers and I think (but don't know), that operators without suffix operate on 8 bit registers. Edit: See Ross Ridge's comment which falsifies my assumption.
So my questions are:
addl) of the instruction above – and what effects have other operations like sub, mov and so on?Thanks in advance!
Normally the suffix is ignored/not important if proper register names are given. So the instruction above is a 32 Bit instruction because esi and ecx are 32 Bit registers.
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