From b7d03293a799db93437fecb152edcce956f7fb3d Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Thu, 19 Jul 2001 14:18:08 +0000 Subject: (Normalization Functions): Remove duplicated description of logb. --- manual/arith.texi | 29 ++--------------------------- 1 file changed, 2 insertions(+), 27 deletions(-) (limited to 'manual/arith.texi') diff --git a/manual/arith.texi b/manual/arith.texi index d5339141c9..fd02a617ed 100644 --- a/manual/arith.texi +++ b/manual/arith.texi @@ -1262,33 +1262,8 @@ For example, @code{ldexp (0.8, 4)} returns @code{12.8}. @end deftypefun The following functions, which come from BSD, provide facilities -equivalent to those of @code{ldexp} and @code{frexp}. - -@comment math.h -@comment BSD -@deftypefun double logb (double @var{x}) -@comment math.h -@comment BSD -@deftypefunx float logbf (float @var{x}) -@comment math.h -@comment BSD -@deftypefunx {long double} logbl (long double @var{x}) -These functions return the integer part of the base-2 logarithm of -@var{x}, an integer value represented in type @code{double}. This is -the highest integer power of @code{2} contained in @var{x}. The sign of -@var{x} is ignored. For example, @code{logb (3.5)} is @code{1.0} and -@code{logb (4.0)} is @code{2.0}. - -When @code{2} raised to this power is divided into @var{x}, it gives a -quotient between @code{1} (inclusive) and @code{2} (exclusive). - -If @var{x} is zero, the return value is minus infinity if the machine -supports infinities, and a very small number if it does not. If @var{x} -is infinity, the return value is infinity. - -For finite @var{x}, the value returned by @code{logb} is one less than -the value that @code{frexp} would store into @code{*@var{exponent}}. -@end deftypefun +equivalent to those of @code{ldexp} and @code{frexp}. See also the +@w{ISO C} function @code{logb} which originally also appeared in BSD. @comment math.h @comment BSD -- cgit 1.4.1