From:	"Benjamin Kalytta" <bkausbk AT web DOT de>
Newsgroups:	comp.os.msdos.djgpp
Subject:	extended assembler
Date:	Sat, 13 Oct 2001 03:03:10 +0200
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I just can understand how extended assembly work in gcc. I want to
define a assembler function which set EDX Register with first
argument.

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

register int _edx asm("%edx");
#define SetError(x)  (_edx=x)

I think extended assembler like asm("movl %0,%%edx": "=p" (x)); should
be used, but how ? It just doesn't work.

benjamin

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