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Date: Fri, 05 Apr 2002 00:07:00 -0000
From: Martin Kahlert <martin.kahlert@infineon.com>
To: Atanas Uzunov <mcubg@mail.bg>
Cc: gcc@gcc.gnu.org
Subject: Re: Assembler in GCC
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Reply-To: martin.kahlert@infineon.com
References: <003901c1dc2d$12d87820$c99d74d4@atanas>
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In-Reply-To: <003901c1dc2d$12d87820$c99d74d4@atanas>; from mcubg@mail.bg on Fri, Apr 05, 2002 at 02:04:23AM +0300
X-SW-Source: 2002-04/txt/msg00184.txt.bz2

Hi,

On Fri, Apr 05, 2002 at 02:04:23AM +0300, Atanas Uzunov wrote:
> Hi,
> I need to know how to implement simple assembler instructions in C for
> example:
> 
> mov ah, 2
> 
> when i wrte this (asm ("mov ah, 2"::)) i get the message: Error: suffix or
> operands invalid for `mov'

Try this links:
http://www-106.ibm.com/developerworks/linux/library/l-ia.html?dwzone=linux
http://www.cs.virginia.edu/~clc5q/links.html

Based on that, i would suggest something like that:

int main (int argc, char **argv)
{
 asm volatile ("movb $2, %%ah" : : :"eax");
}

Read gcc's info page about extended inline assembly, too.

Hope that helps,
Martin.

-- 
The early bird catches the worm. If you want something else for       
breakfast, get up later.