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Re: GCC beaten by ICC in stupid trig test!

From: Robert Dewar <dewar at gnat dot com>
To: Dave Korn <dk at artimi dot com>
Cc: gcc at gcc dot gnu dot org
Date: Thu, 25 Mar 2004 00:31:53 -0500
Subject: Re: GCC beaten by ICC in stupid trig test!
References: <NUTMEGdqVvPdLFYxc9N0000021d@NUTMEG.CAM.ARTIMI.COM>

Dave Korn wrote:

  IIUIC the fact that the + operator is specified in the standard as binding
left-to-right imply that "a + b + c" with no brackets *has* to be
interpreted as "(a + b) + c".

Either that, or I'm being dumb.

In Fortran, this is an incorrect interpretation, the standard definitely differentiates between (a+b)+c and a+b+c. So a Fortran compiler is allowed to reassociate the second expression (but it is a bad idea, and it is desirable to have a mode in which this freedom is not taken advangtage of).

Follow-Ups:
- Re: GCC beaten by ICC in stupid trig test!
  - From: Scott Robert Ladd

References:
- RE: GCC beaten by ICC in stupid trig test!
  - From: Dave Korn

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