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From: guy%gorodish@Sun.COM (Guy Harris)
Newsgroups: comp.lang.c
Subject: Re: Optimizing Floating-Point Expression Evaluation
Message-ID: <16675@sun.uucp>
Date: Tue, 14-Apr-87 13:18:02 EST
Article-I.D.: sun.16675
Posted: Tue Apr 14 13:18:02 1987
Date-Received: Sun, 19-Apr-87 04:18:17 EST
References: <16646@sun.uucp>
Sender: news@sun.uucp
Reply-To: guy@sun.UUCP (Guy Harris)
Organization: Sun Microsystems, Mountain View
Lines: 12
Keywords: float point expression

>	I am NOT talking about integer expression evaluation.
>In C, I can readily believe that there is a significant body of
>code that was written with the expectation that constants would
>be combined despite parentheses.  I don't think it was wise to
>code that way,

Given that a lot of code was written in this fashion because it used
macros, what's your alternative?  Macros provide a good facility for
isolating various abstractions (e.g., the number of disk blocks
required to hold N bytes), and many times an expression involving
several such macros can be evaluated more efficiently if constants
are combined despite parentheses.