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 <mattst88@xxxxxxxxx> --- 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@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
