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| Title: | Alpha Developer Support |
| Notice: | [email protected], 800-332-4786 |
| Moderator: | HYDRA::SYSTEM |
|
| Created: | Mon Jun 06 1994 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 3722 |
| Total number of notes: | 11359 |
3433.0. "visix" by HYDRA::AXPDEVELOPER (Alpha Developer support) Thu Apr 03 1997 03:02
Company Name : visix
Contact Name : Shawn Carnell
Phone :
Fax :
Email : [email protected]
Date/Time in : 3-APR-1997 02:01:47
Entered by : Ian Chamberlin
SPE center : REO
Category : unix
OS Version :
System H/W :
Brief Description of Problem:
-----------------------------
From: SMTP%"[email protected]" 2-APR-1997 17:23:56.40
To: [email protected]
CC:
Subj: HUGH_VAL and -ieee
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Date: Wed, 2 Apr 1997 16:14:24 -0500
Message-Id: <[email protected]>
From: Shawn Carnell <[email protected]>
To: [email protected]
Subject: HUGH_VAL and -ieee
Reply-To: [email protected]
Mime-Version: 1.0 (generated by tm-edit 7.100)
Content-Type: text/plain; charset=US-ASCII
Customer Code: 586962
Folks,
I'm using DEC C V5.2-033 on Digital UNIX V4.0 (Rev. 564).
Given this program:
#include <stdlib.h>
#include <math.h>
int main (int argc, char **argv)
{
double foo;
foo = HUGE_VAL;
return 0;
}
If i compile without the -ieee flag, all is well. If i compile with
-ieee, i get the following warning:
cc: Warning: foo.c, line 8: In this statement, a floating point error occurs in evaluating the expression "1.8e308".
foo = HUGE_VAL;
--------^
Please pardon my ignorance. I've read the man pages but i'm still not
sure what action i should take to avoid this warning (i want to use
-ieee).
Thanks!
Shawn
From: SMTP%"[email protected]" 2-APR-1997 17:23:56.40
To: [email protected]
CC:
Subj: HUGH_VAL and -ieee
Return-Path: [email protected]
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id AA03344; Wed, 2 Apr 1997 16:14:24 -0500
Date: Wed, 2 Apr 1997 16:14:24 -0500
Message-Id: <[email protected]>
From: Shawn Carnell <[email protected]>
To: [email protected]
Subject: HUGH_VAL and -ieee
Reply-To: [email protected]
Mime-Version: 1.0 (generated by tm-edit 7.100)
Content-Type: text/plain; charset=US-ASCII
Customer Code: 586962
Folks,
I'm using DEC C V5.2-033 on Digital UNIX V4.0 (Rev. 564).
Given this program:
#include <stdlib.h>
#include <math.h>
int main (int argc, char **argv)
{
double foo;
foo = HUGE_VAL;
return 0;
}
If i compile without the -ieee flag, all is well. If i compile with
-ieee, i get the following warning:
cc: Warning: foo.c, line 8: In this statement, a floating point error occurs in evaluating the expression "1.8e308".
foo = HUGE_VAL;
--------^
Please pardon my ignorance. I've read the man pages but i'm still not
sure what action i should take to avoid this warning (i want to use
-ieee).
Thanks!
Shawn
| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 3433.1 | with -ieee, HUGE_VAL is +infinity | HYDRA::NEWMAN | Chuck Newman, 508/467-5499 (DTN 297), MRO1-3/F26 | Thu Apr 03 1997 10:50 | 8 |
| When compiled with -ieee, HUGE_VAL is +infinity (0x7ff0000000000000)
The compiler does the assignment correctly, but issues a warning that the
value isn't a valid number.
If they want the largest valid number, use DBL_MAX instead of HUGE_VAL
-- Chuck Newman
|
| 3433.2 | asap membership # | HYDRA::SHEN | | Thu Apr 03 1997 12:21 | 56 |
| From: SMTP%"[email protected]"
To: [email protected] ([email protected])
CC:
Subj: Re: HUGH_VAL and -ieee
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Date: Thu, 3 Apr 1997 09:41:34 -0500
Message-Id: <[email protected]>
From: Shawn Carnell <[email protected]>
To: [email protected] ([email protected])
Subject: Re: HUGH_VAL and -ieee
In-Reply-To: <[email protected]>
References: <[email protected]>
Reply-To: [email protected]
Mime-Version: 1.0 (generated by tm-edit 7.100)
Content-Type: text/plain; charset=US-ASCII
[email protected] writes:
| Shawn,
|
| Thank you for your inquiry.
|
| I have passed your inquiry onto one of our engineers who shoul be
contacting
you
| shortly.
|
| However, I cannot find you as a ASAP member under your customer no
586962, Yo
ur
| company Visix or your name. My list is a bit out of date but can you
confirm
| that you are an ASAP member.
We are indeed members. That's the right number according to my
"Association of Software & Application Partners Program, How to Use
our Services" sheet. I just used the same number for an e-mail
support request about 1 week ago. Our membership should run through
December of 1997.
Is there some additional information i can give you?
Shawn
|
| 3433.3 | use DBL_MAX | RDGENG::CHAMBERLIN | Danger! Do not Reverse Polarity | Mon Apr 07 1997 05:51 | 19 |
| (Sent on 3rd April)
Shawn,
When compiled with -ieee, HUGE_VAL is +infinity (0x7ff0000000000000)
The compiler does the assignment correctly, but issues a warning that the
value isn't a valid number.
If you want the largest valid number, use DBL_MAX instead of HUGE_VAL (need to
include <limits.h>)
regards,
Ian Chamberlin,
Digital Equipment Co, Software Partner Engineering.
|