Date: Wed, 22 Feb 1995 13:06:47 +0100
From: "Christoph P. Kukulies" <kuku AT gilberto DOT physik DOT rwth-aachen DOT de>
Subject: strange fp exception
To: djgpp AT sun DOT soe DOT clarkson DOT edu


I'm running dj112 maint4 and a program that used to work under MSC (NT/WIN95)
and which I ported back to DGJPP/GRX suddenly has problems for
a reason I don't understand:

go32 version 1.12.maint3 Copyright (C) 1994 DJ Delorie
236340+20480+217724 = 474544
412 Kb conventional, 1024 Kb expanded - 1436 Kb total RAM available
eax=00000c7a  ebx=00068e1c  ecx=0003fbdc  edx=00000000
esi=00000000  edi=00000000  ebp=7ffffda4     RF       UP IE    PL NZ    PE NC
ds=0048 es=0048 fs=0048 gs=0038 ss:esp=0048:7ffffd20 cs=00d8
Numeric Exception (invalid operation) at eip=0x00001780
00001780: db5d88         fistp   [ebp-120]           
00001783: d96de0         fldcw   [ebp-32]            mebp=7ffffda4 
where
0x00001783 _vci_, line 606 in file vci.c
0x0000bb83 _dline2_, line 3263 in file vci.c
0x000004e4 _MAIN__+770
0x0002b7f5 _main+177
 
And line 606 has the following:
		    
points[i].y = window.y_size - (int) realout[i];

I can only suspect that the cast (int) could cause the problem.
All variables are int in that assignment.


Any clues? Were there problems like this in djgpp/gcc 2.6.0 ?

--Chris Christoph P. U. Kukulies kuku AT gil DOT physik DOT rwth-aachen DOT de
FreeBSD blues 2.1.0-Development FreeBSD 2.1.0-Development #0: Fri Feb 17
18:32:16  1995     root AT blues:/usr/src/sys/compile/BLUES  i386