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From: blarson@castor.usc.edu (Bob Larson)
Newsgroups: comp.lang.c
Subject: Constant expression to round down to power of 2 desired
Message-ID: <1265@castor.usc.edu>
Date: Sun, 22-Mar-87 20:25:07 EST
Article-I.D.: castor.1265
Posted: Sun Mar 22 20:25:07 1987
Date-Received: Tue, 24-Mar-87 01:45:27 EST
Reply-To: blarson@castor.usc.edu
Distribution: world
Organization: USC AIS, Los Angeles
Lines: 13

Does anyone have an expression that can be computed at compile time to
round a constant down to a power of 2?  (Conversions from round-up and
the boundary case are trivial.)

I'm currently using a run-time iterative solution, but I'll probably
convert it to nested ?: operations before the code is released.

Please reply directly to me, I'll summarize if there is interest.
-- 
Bob Larson
Arpa: Blarson@Usc-Eclb.Arpa
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