From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marc Lehmann <pcg@goof.com>
To: egcs@cygnus.com
Subject: Re: [EGCS] Re: min/max macros
Date: Thu, 11 Dec 1997 17:57:00 -0000
Message-id: <19971212025753.58271@cerebro.laendle>
References: <01BD0625.FDFCC640@bill.icdata.com> <Pine.GSO.3.96.971211223837.23637C-100000@alcyone.dbai.tuwien.ac.at>
X-SW-Source: 1997-12/msg00686.html

> > #define max(a,b)	(((a) > (b)) ? (a) : (b))
> > #define min(a,b)	(((a) < (b)) ? (a) : (b))
> 
> That is a big no-no: Absolutely no performance benefits with any decent
> compiler but nasty side effects.

so egcs isn't a decent compiler?

for example, the macro-max(2,3) will be evaluated at compile time,
while the function-max(2,3) won't...

this get's even worse on things like:

int mult(int a, int b) { return a*b; };

mult(a,3) will result in an "imul 3" on x86... definitely
slower than a lea, for example.

      -----==-                                              |
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      ---==---(_)__  __ ____  __       Marc Lehmann       +--
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    The choice of a GNU generation                        |
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