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Date: Fri, 4 Jan 2008 13:07:51 -0800
From: "David O'Brien" <obrien@freebsd.org>
To: Nate Eldredge <nge@cs.hmc.edu>
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Cc: freebsd-amd64@freebsd.org
Subject: Re: how do i write assembly code in amd64
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On Sat, Dec 22, 2007 at 08:29:46PM -0800, Nate Eldredge wrote:
> On Sun, 23 Dec 2007, zhang feng wrote:
>> i write asm32 code in linux.when i run the code in freebsd amd64, it
>> cannt run.  someone give me a help for coding asm64 in freebsd.
> 
> amd64 has a whole different instruction set than 32-bit x86,

Not true at all.  97% of the instructions are the same.  What is
different is the operand size and the C calling ABI.

For the most part, code can be port by simple s/%e/%r/.

-- 
-- David  (obrien@FreeBSD.org)