ALERT: egcs bug in cast unsigned->double (fwd)

[Fred Bacon <bacon at aerodyne dot com>]

This may be a duplicate report, but I'm concerned that it may not have
been sent to you.  Anyway, the attached code shows a problem with the ppc
implementation of egcs on multiple machines and operating systems.

The original report came from Albrecht Dress.  If this is a duplication, I
apologize.

> I second that. Incidently it also happens with egcs 1.1b in AIX 3.2.5 on
a
> RS/6000 box. It definitely looks like a bug in all ppc egcs ports since
> the code works perfectly with native the AIX compiler. BTW, the address
> for submitting bug report is egcs-bugs@cygnus.com.
> 
> ---
> Amal Phadke
> Department of Ocean Engineering
> University of Hawaii at Manoa
> 
> e-mail: phadke@kewalo.eng.hawaii.edu (MkLinux DR3)   

Fred Bacon

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---------- Forwarded message ----------
Date: Thu, 5 Nov 1998 18:07:35 +0100 (MET)
From: Albrecht Dress <ad@Speckle.mpifr-bonn.mpg.de>
To: MkLinux Setup <mklinux-setup@public.lists.apple.com>
Cc: LinuxPPC <linux-pmac@samba.anu.edu.au>
Subject: ALERT: egcs bug in cast unsigned->double

Hi all,

	I would like to warn all programmers about a bug in egcs-2.90.25 
980302 (egcs-1.0.2 prerelease) on MkLinux/PowerPC G3 (and possibly other 
ppc platforms).  Save the two files below, chmod 755 Check.sh, and run 
Check.sh.  On my system (Apple PowerBook G3/300, MkLinux DR3), the Check 
program failes on casting the unsigned types.  I don't have the address 
of the egcs bug list, could someone forward this mail to them?

Thanks and happy hacking,

	Albrecht.
---Snip here and save as "Check.sh"---
#!/bin/bash
for type in INT UINT SHORT USHORT ; do
        echo "$type:"
        gcc -D$type -O3 Check.c -o Check
        Check
done
-----------------
---Snip here and save as "Check.c"---
#include <stdio.h>

#ifdef INT
typedef int chktype;
#elif  USHORT
typedef unsigned short chktype;
#elif  UINT
typedef unsigned int chktype;
#elif  SHORT
typedef short chktype;
#else
#error "no type defined!"
#endif

int main (void)
{
        chktype a [512][512];
        double b;

        a [123][456] = 1009;
        b = (double)a [123][456];
        printf ("%d == %g ?????\n", a [123][456], b);
        return 0;
}
----------------------