assembler design

Hello everybody,


Well I'm trying to write a simple assembler with intel syntax.
I've got a look at gasm source (the gnu assembler) to get an idea on
how it's implemented or especially how it translates mnemonics into
opcodes, it's so complicated the way he does .
it uses a struct table representing the mnemonic token, it's
equivalent opcode,
how many arguments...


for example these following statements haven't the same opcodes
mov ah, mem
mov mem, h


so we have to say invent a way to handle all different possible ways


please can anybody clear things up for me

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