Date: Sun, 29 Apr 2007 00:20:10 GMT From: Bruce Evans <bde@zeta.org.au> To: freebsd-standards@FreeBSD.org Subject: Re: standards/112180: tgamma on negative integers returns Inf instead of NaN Message-ID: <200704290020.l3T0KA0e069040@freefall.freebsd.org>
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The following reply was made to PR standards/112180; it has been noted by GNATS. From: Bruce Evans <bde@zeta.org.au> To: =?X-UNKNOWN?Q?Vincent_Lef=E8vre?= <vincent@vinc17.org> Cc: freebsd-gnats-submit@FreeBSD.org, freebsd-standards@FreeBSD.org Subject: Re: standards/112180: tgamma on negative integers returns Inf instead of NaN Date: Sun, 29 Apr 2007 10:14:55 +1000 (EST) This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --0-200284211-1177805695=:17746 Content-Type: TEXT/PLAIN; charset=X-UNKNOWN; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE On Fri, 27 Apr 2007, Vincent Lef=E8vre wrote: > Though POSIX allows an implementation-defined value to be returned, this = is mainly in the case where NaN is not supported, and NaN is the best choic= e and is what tgamma returns on other platforms (Linux, HP-UX, Mac OS X). Also, Annex F of C99 (about the IEEE-754/IEC-mumble binding) requires a NaN plus the "invalid" exception. Bruce --0-200284211-1177805695=:17746--
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