[ECOS] where can I find the assebly language manual used in the coding..

[Jonathan Larmour]

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
-- 
eCosCentric    http://www.eCosCentric.com/    The eCos and RedBoot experts
--[ "You can complain because roses have thorns, or you ]--
--[  can rejoice because thorns have roses." -Lincoln   ]-- Opinions==mine


-- 
Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
and search the list archive: http://sources.redhat.com/ml/ecos-discuss