Message-ID: <32EEE110.20FC@rangenet.com>
Date: Tue, 28 Jan 1997 23:33:04 -0600
From: Dan Hedlund <markiv AT rangenet DOT com>
Reply-To: markiv AT rangenet DOT com
Organization: Range Net
MIME-Version: 1.0
To: nikki AT gameboutique DOT co
CC: djgpp AT delorie DOT com
Subject: Re: assembler question
References: <5cltef$2l1 AT flex DOT uunet DOT pipex DOT com>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

nikki wrote:
> 
> i'm trying to code the following line in inline assembler, but i made a booboo.
> 
> a=*((unsigned short *)(EBX<<1));
> 
> where EBX is an unsigned long and a is an unsigned short
> EBX<<1 points to a correct memory location incidentally, that line is supposed to
> look like that ;)
> 
> i coded this as..
> 
> asm ("movw (%%ebx,2),%%ax"
>         : "=a" (a)
>         : "b" (EBX)
>         : "%eax");
> 
> but it has the effect of doing a=*((unsigned short *)(EBX)); instead.
> it's ignoring the ,2 bit totally and i can't see why. how should i be doing this?
> movw ($0,%%ebx,2),%%ax won't work either ;(
> 
> nik
> 
> --
> Graham Tootell           GameBoutique Ltd. - THE online gaming experience
> nikki AT gameboutique DOT com   http://www.gameboutique.com

try : movw (,%%ebx,2),%%ax

-- 

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