Janet,
I have experienced many situations that resulted in divide by zero. I have
never had the floating point operation (itself) cause the system to hang. It
simply returns a result of "nan". But often they way MY code reacts to a
returned "nan" has caused system hang-up (insert embarrassed smirk here).
Todd Gearheart
Software Engineer Dept 041
FlightSafety International
Simulation Systems Division
[EMAIL PROTECTED]
(316) 612-5356
-----Original Message-----
From: Estabridis, Janet P [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, October 02, 2001 10:05 PM
To: 'Norm Dresner '; '[EMAIL PROTECTED] '; Estabridis, Janet P
Subject: RE: [rtl] More questions about floating point
I'll be waiting. Maybe you can answer this for me. Does the system hang
or crash if you do get an overflow on a divide ? I am experiencing some
problems and I'm trying to track it down. I am not always sure my numbers
will be well bounded when I do the operations (coordinate translation and
rotation) due to the fact that I am receiving the data via a remote site.
Janet
-----Original Message-----
From: Norm Dresner
To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Sent: 10/2/01 4:55 PM
Subject: Re: [rtl] More questions about floating point
I assume we're talking about x86 architecture. What you
want to do is to read the status register of the FPU. IIRC
there are FPU-instructions for doing just that.
Unfortunately I don't know the linux assembler well enough
to come up with a Q&D means of doing that but hopefully one
of the gurus will jump in and save the day.
Norm
----- Original Message -----
From: Estabridis, Janet P <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, October 02, 2001 4:49 PM
Subject: [rtl] More questions about floating point
> Hi,
>
> Can you check for a floating point overflow if you are
using floating point
> in a kernel thread ?
>
> Janet Estabridis
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