From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matt Turner Subject: [patch] rint.3: Document that halfway cases are rounded to even. Date: Thu, 12 Mar 2015 18:43:27 -0700 Message-ID: <1426211007-9986-1-git-send-email-mattst88@gmail.com> References: Return-path: In-Reply-To: Sender: linux-man-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org Cc: linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Matt Turner List-Id: linux-man@vger.kernel.org Per IEEE-754 rounding rules. The round(3) page describes the behavior of rint and nearbyint in the halfway cases by saying: These functions round x to the nearest integer, but round halfway cases away from zero [...], instead of to the nearest even integer like rint(3) Signed-off-by: Matt Turner --- man3/rint.3 | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/man3/rint.3 b/man3/rint.3 index d1bd302..59402a7 100644 --- a/man3/rint.3 +++ b/man3/rint.3 @@ -94,7 +94,9 @@ format, using the current rounding direction (see .BR fesetround (3)) and without raising the .I inexact -exception. +exception. When the current rounding direction is to nearest, these +functions round halfway cases to the even integer in accordance with +IEEE-754. .LP The .BR rint (), -- 2.0.5 -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html