From:	"John M. Aldrich" <fighteer AT cs DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Help! Random is not working right
Date:	Sun, 13 Apr 1997 02:38:47 -0700
Organization:	Two pounds of chaos and a pinch of salt
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Message-ID:	<3350A9A7.6C3D@cs.com>
References:	<3349B612 DOT 68C AT ucsu DOT Colorado DOT edu> <860484279 DOT 79294 AT red DOT parallax DOT co DOT uk> <33509CB8 DOT EFFF98A AT alcyone DOT com>
Reply-To:	fighteer AT cs DOT com
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To:	djgpp AT delorie DOT com
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Erik Max Francis wrote:
> 
> It should be noted for people who are wondering why they've seen masks
> used this way is that masking is equivalent to a modulus operation (and
> much faster) when the modulo (one greater than the mask) is an even power
> of two.

It should also be noted that gcc is very smart when it comes to
optimizations, and will probably convert modulus operators into masks
when you're modding with powers of two.  It's okay to trust the
compiler!  ;)

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