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Re: where can I find the assebly language manual used in thecoding..
Nick Garnett wrote:
Jonathan Larmour <jifl@eCosCentric.com> writes:
Obviously you can also look at the "info gas" stuff as Gary says, but
general stuff about the IA32 instruction set is at e.g. for pentium
http://developer.intel.com/design/intarch/pentium/docs_pentium.htm
and similarly you can hunt around the AMD site.
Those pages would not be a great help since GAS implements the AT&T
syntax rather than the Intel syntax.
GAS now supports both actually. Albeit it with a ".intel_syntax" directive.
> However to anyone familiar with
Intel syntax, AT&T syntax should be easy to pick up -- I certainly
never had any difficulty.
The main differences are:
- source and destination operands are in reverse order.
- The size of a transfer is encoded as a "b", "w" or "l" suffix on the
opcode, not inferred from the operands.
- The general syntax of addressing modes is offset(base_reg,index_reg,scale)
with elements omitted if they are not needed.
- Some of the more obscure opcodes are named slightly differently.
info gas even has a page on the differences :-).
Jifl
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