Re: port-amd64/45391: pow(3) wrong result for x = 0.0 and y < 0

[Taylor R Campbell <campbell+netbsd-tech-userlevel%mumble.net@localhost>]

The following reply was made to PR port-amd64/45391; it has been noted by GNATS.

From: Taylor R Campbell <campbell+netbsd-tech-userlevel%mumble.net@localhost>
To: David Holland <dholland-tech%netbsd.org@localhost>
Cc: gnats-bugs%netbsd.org@localhost, tech-userlevel%netbsd.org@localhost
Subject: Re: port-amd64/45391: pow(3) wrong result for x = 0.0 and y < 0
Date: Tue, 8 Sep 2015 16:13:33 +0000

    Date: Tue, 8 Sep 2015 16:03:54 +0000
    From: David Holland <dholland-tech%netbsd.org@localhost>
 
    On Tue, Sep 08, 2015 at 08:41:55AM +0000, David Holland wrote:
     > Also, what's pow(+/-0, non-integer) supposed to produce?
 
    Erm, that was supposed to be "negative non-integer"...
 
 IEEE 754-2008, Sec. 9.2.1 `Special values', p. 45:
 
 > For the pow function (integral exponents get special treatment):
 >     ...
 >     pow(+/-0, y) is +infinity and signals the divideByZero exception for =
 finite y<0 and not an odd integer