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From:	challier AT news DOT irit DOT fr (Jean-Marc CHALLIER)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: DJGPP: Inline assembly?
Date:	3 Jan 1996 11:55:33 GMT
Organization:	IRIT-UPS, Toulouse, France
Lines:	27
Message-ID:	<4cdqrl$ie@orphee.irit.fr>
References:	<4apphs$las AT micro DOT internexus DOT net> <Pine DOT SUN DOT 3 DOT 91 DOT 951215145127 DOT 728B-100000 AT t3b> <4b65md$ol0 AT orphee DOT irit DOT fr> <4b9n8n$93q AT stealth DOT mindspring DOT com>
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To:	djgpp AT delorie DOT com
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Thomas Sames (tsames AT atl DOT mindspring DOT com) wrote:
: You can also use an offset from the stack to obtain the passed
: parameter to the function.  This is faster for a 386 but for the 486
: and pentuim, use the local variable.

True but be careful about that : the compiler may "push" a few
registers on the stack before the function code itself, thus
destroying your knowledge of "what's-where" relative to ESP. If you
meant EBP, it's quite more safe, but your program won't be able to
compile both with and with out the "-fomit-frame-pointer" option. I
know it's a bit buggy (specially with C++), but for for small
functions that can't be inlined (like those that are called via a
pointer) it can dramatically improve speed. The point in what I wrote
was : Leave to GCC as much work as possible : it's almost the only one
who knows how to play in its mud... :-)

Hope this helps...

			Igx, The dreaming drummer...

-----------------------------------------------------------------------------
Igx, The dreaming drummer... in real(???) life : Jean-Marc CHALLIER
email : challier AT irit DOT fr		| J-M CHALLIER,
pmail : IR1-17, UPS, 18 rte de Narbonne | 18, Bd Griffoul Dorval
	31000 Toulouse - FRANCE		| 31400 Toulouse - FRANCE
phone : (33) 61-55-63-57		| Tel : (33) 62-16-35-92

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