From owner-freebsd-hackers  Sun Oct 28  7:51:33 2001
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Date: 28 Oct 2001 07:51:28 -0800
Date: Sun, 28 Oct 2001 07:51:28 -0800
From: Seth Kingsley <sethk@meowfishies.com>
To: Matthew Emmerton <matt@gsicomp.on.ca>
Cc: hackers@freebsd.org
Subject: Re: Simple x86 assembler question
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In-Reply-To: <003901c15f3c$5bdef760$1200a8c0@gsicomp.on.ca>; from matt@gsicomp.on.ca on Sat, Oct 27, 2001 at 07:08:58PM -0400
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On Sat, Oct 27, 2001 at 07:08:58PM -0400, Matthew Emmerton wrote:
> In particular, am I interpreting these instructions correctly?
>=20
> 0x80839fb <uttstrbyt+43>:       movzbl (%edx,%eax,1),%eax
>=20
>=20
> Takes %eax + %edx, obtains the byte value in memory at that address,
> zero-extends and places into %eax
>=20
> 0x80839ff <uttstrbyt+47>:       movzwl 0xe90(%ebx,%eax,2),%edx
>=20
> Takes %eax + %ebx + 0xe90, obtains the word value in memory at that addre=
ss,
> zero-extends and places in %edx.

http://www.baldwin.cx/386htm/toc.htm

Specifically:

http://www.baldwin.cx/386htm/MOVZX.htm

--=20
|| Seth Kingsley || Meow Meow Fluff Fluff || sethk@meowfishies.com ||
|| rndcontrol -s 0                                                 ||

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