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From: mju@mudos.pc.cc.cmu.edu (Marc Unangst)
Newsgroups: comp.os.386bsd.apps,comp.os.386bsd.bugs
Subject: Re: Bugs in FP emulator (was Re: Perl-4.036?)
Date: 13 Sep 1993 12:55:48 -0400
Organization: The Programmers' Pit Stop, Pittsburgh, PA
Lines: 22
Message-ID: <2728n2$bsn@mudos.pc.cc.cmu.edu>
References: <26fptu$1q1@terminator.rs.itd.umich.edu> <26g7srINNppg@xs4all.hacktic.nl> <CD9Dy6.B51@hippo.ru.ac.za> <2724fl$8fd@pdq.coe.montana.edu>
NNTP-Posting-Host: localhost.pc.cc.cmu.edu
nate@bsd.coe.montana.edu (Nate Williams) writes:
>Hmm, never had a problem with the 'exp' tests.. See below.
I believe the problem with the 'exp' tests under Perl is related
to problems in the floating-point emulator. On a system without
hardware floating-point (486SLC/25), the following program prints
"sqrt(2) = 2.000000". On a system with hardware floating-point
(486DX/33), it prints "sqrt(2) = 1.414214". Both systems are running
NetBSD 0.9 with the distributed versions of gcc 2.4.5 and npx.
/* test program to demonstrate bug in FP emulator */
#include <stdio.h>
#include <math.h>
main() {
printf("sqrt(2) = %lf\n", sqrt(2.0));
}
--
Marc Unangst, N8VRH | "Free software is NOT the same thing as
mju@mudos.pc.cc.cmu.edu | free beer."
| -Philip Knapp in comp.os.linux