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Re: F77 FP screwup (i386 cross-compiler -> vax)

From: Toon Moene <toon at moene dot indiv dot nluug dot nl>
To: Matt Thomas <matt at 3am-software dot com>
Cc: gcc-bugs at gcc dot gnu dot org
Date: Sat, 21 Sep 2002 12:55:26 +0200
Subject: Re: F77 FP screwup (i386 cross-compiler -> vax)
Organization: Moene Computational Physics, Maartensdijk, The Netherlands
References: <5.1.1.6.2.20020827114539.037e8e88@3am-software.com>

Matt Thomas wrote:

I've been trying to figure out why the g77 testsuite has so
many failures for a VAX target when my host is running
NetBSD/i386.  Briefly, it comes down to g771 emitting
incorrect floating point numbers.

Given the following two small programs:

        foo = acos(0.54030231)
        end

And

        x(void) { acos(0.54030231); }

I would expect them to generate approx. the same code.

...

Before I dig into the f77 sources, I was hoping this might trigger
someone who knows f77 to fix it for me. :)

Is this still a problem after Richard Henderson's recent overhaul of real.c ?

--
Toon Moene - mailto:toon@moene.indiv.nluug.nl - phoneto: +31 346 214290
Saturnushof 14, 3738 XG Maartensdijk, The Netherlands
Maintainer, GNU Fortran 77: http://gcc.gnu.org/onlinedocs/g77_news.html
Join GNU Fortran 95: http://g95.sourceforge.net/ (under construction)

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