From:	Bill Currie <bcurrie AT tssc DOT co DOT nz>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Inline asm
Date:	Thu, 11 Dec 1997 11:52:22 +1300
Organization:	Telecommunication Systems Support Centre
Lines:	17
Message-ID:	<348F1D26.527A@tssc.co.nz>
References:	<199712040055 DOT QAA21354 AT adit DOT ap DOT net>
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Nate Eldredge wrote:
> Not quite. You will have to (save/restore) or (tell the compiler that you
> clobbered) registers which it expects to be preserved across function calls.
> Last I checked, this was %ebx, %esi, %edi and %ebp. IMHO, you should inform

This is correct, though you also have to preserve %ds and %es and
unfortuanatly, there is no way of telling gcc about clobbered segment
registers.

> the compiler about clobbering every register that you change, and it will
> then take appropriate action if necessary.

This is especially true if you start useing inline, __inline__ or -O3.

Bill
-- 
Leave others their otherness

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