bugGNU Common Lisp - Bugs: bug #30079, MINUSP handles float NaN...

 
 
Show feedback again

bug #30079: MINUSP handles float NaN incorrectly in compiled code

Submitted by:  None
Submitted on:  Tue 08 Jun 2010 05:07:42 AM UTC  
 
Category: NoneSeverity: 3 - Normal
Item Group: NoneStatus: None
Privacy: PublicAssigned to: None
Open/Closed: Open

Add a New Comment (Rich MarkupRich Markup):
   

You are not logged in

Please log in, so followups can be emailed to you.

 

Tue 08 Jun 2010 05:07:42 AM UTC, original submission:

In the following, X is floating point infinity, Y is NaN.
MINUSP should return NIL for NaN, and in interpreted code it does, but in compiled code it is incorrect.

(setf si:print-nans t)
(defvar x (exp (expt 2 1000)))
(defvar y (- x x))
(defun f (x) (minusp x))
(defun g (x) (minusp x))
(compile 'g)
(f y)
=> NIL (OK)
(g y)
=> T (INCORRECT !!!)

Anonymous

 

(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

Attach File(s):
   
   
Comment:
   

No files currently attached

 

Depends on the following items: None found

Items that depend on this one: None found

 

CC list is empty

 

Do you think this task is very important?
If so, you can click here to add your encouragement to it.
This task has 0 encouragements so far.

Only logged-in users can vote.

 

Please enter the title of George Orwell's famous dystopian book (it's a date):

 

 

No Changes Have Been Made to This Item
Show feedback again

Back to the top


Powered by Savane 3.1-cleanup