Date: Fri, 12 Oct 2001 21:21:48 -0400
Message-Id: <200110130121.f9D1LmY19834@envy.delorie.com>
From: DJ Delorie <dj AT delorie DOT com>
To: djgpp AT delorie DOT com
In-reply-to: <9q8418$23s$00$1@news.t-online.com> (bkausbk@web.de)
Subject: Re: extended assembler
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> I want to define a assembler function which set EDX Register with
> first argument.

Why?

> If I do following I got error message "warning: call-clobbered register
> used for global register variable"

Pretty much *any* function is going to change the value of %edx, so
gcc is warning you that explicitly using %edx is asking for trouble.
Especially when you create a global %edx register variable, since gcc
can't guarantee that it has the right value at all times.