Re: lib/49240: Some corner cases for pow() fail to work correctly

[Havard Eidnes <he%NetBSD.org@localhost>]

The following reply was made to PR lib/49240; it has been noted by GNATS.

From: Havard Eidnes <he%NetBSD.org@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: lib/49240: Some corner cases for pow() fail to work correctly
Date: Tue, 30 Sep 2014 17:23:27 +0200 (CEST)

 >  I've dug some more, and it looks like the following four tests:
 >
 >  	assertEquals(NaN, pow(1, Infinity));
 >  	assertEquals(NaN, pow(1, -Infinity));
 >  	assertEquals(NaN, pow(-1, Infinity));
 >  	assertEquals(NaN, pow(-1, -Infinity));
 >
 >  are in fact erroneous, at least reportedly if one is to follow
 >  C99, and some (FreeBSD commit messages) claim the revised IEEE
 >  754 of 2008.  These are now all defined to give +1.0 as result.
 >  I'll follow that up with Google's V8 project.
 
 The feedback I received there is that ECMAscript is specific
 about mandating the old IEEE 754 rules in these 4 test cases.
 I'm currently testing a wrapper patch for this issue in v8, so
 that C99 systems also can do this "correctly".
 
 Regards,
 
 - Havard