1*05a0b428SJohn Marino.\" $OpenBSD: ilogb.3,v 1.6 2013/06/05 03:40:26 tedu Exp $ 2*05a0b428SJohn Marino.\" Copyright (c) 1985, 1991 Regents of the University of California. 3*05a0b428SJohn Marino.\" All rights reserved. 4*05a0b428SJohn Marino.\" 5*05a0b428SJohn Marino.\" Redistribution and use in source and binary forms, with or without 6*05a0b428SJohn Marino.\" modification, are permitted provided that the following conditions 7*05a0b428SJohn Marino.\" are met: 8*05a0b428SJohn Marino.\" 1. Redistributions of source code must retain the above copyright 9*05a0b428SJohn Marino.\" notice, this list of conditions and the following disclaimer. 10*05a0b428SJohn Marino.\" 2. Redistributions in binary form must reproduce the above copyright 11*05a0b428SJohn Marino.\" notice, this list of conditions and the following disclaimer in the 12*05a0b428SJohn Marino.\" documentation and/or other materials provided with the distribution. 13*05a0b428SJohn Marino.\" 3. Neither the name of the University nor the names of its contributors 14*05a0b428SJohn Marino.\" may be used to endorse or promote products derived from this software 15*05a0b428SJohn Marino.\" without specific prior written permission. 16*05a0b428SJohn Marino.\" 17*05a0b428SJohn Marino.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18*05a0b428SJohn Marino.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19*05a0b428SJohn Marino.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20*05a0b428SJohn Marino.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21*05a0b428SJohn Marino.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22*05a0b428SJohn Marino.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23*05a0b428SJohn Marino.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24*05a0b428SJohn Marino.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25*05a0b428SJohn Marino.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26*05a0b428SJohn Marino.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27*05a0b428SJohn Marino.\" SUCH DAMAGE. 28*05a0b428SJohn Marino.\" 29*05a0b428SJohn Marino.\" from: @(#)ieee.3 6.4 (Berkeley) 5/6/91 30*05a0b428SJohn Marino.\" 31*05a0b428SJohn Marino.Dd $Mdocdate: June 5 2013 $ 32*05a0b428SJohn Marino.Dt ILOGB 3 33*05a0b428SJohn Marino.Os 34*05a0b428SJohn Marino.Sh NAME 35*05a0b428SJohn Marino.Nm ilogb , 36*05a0b428SJohn Marino.Nm ilogbf , 37*05a0b428SJohn Marino.Nm ilogbl 38*05a0b428SJohn Marino.Nd extract exponent 39*05a0b428SJohn Marino.Sh SYNOPSIS 40*05a0b428SJohn Marino.In math.h 41*05a0b428SJohn Marino.Ft int 42*05a0b428SJohn Marino.Fn ilogb "double x" 43*05a0b428SJohn Marino.Ft int 44*05a0b428SJohn Marino.Fn ilogbf "float x" 45*05a0b428SJohn Marino.Ft int 46*05a0b428SJohn Marino.Fn ilogbl "long double x" 47*05a0b428SJohn Marino.Sh DESCRIPTION 48*05a0b428SJohn Marino.Fn ilogb 49*05a0b428SJohn Marinoreturns 50*05a0b428SJohn Marino.Fa x Ns 's exponent 51*05a0b428SJohn Marino.Fa n , 52*05a0b428SJohn Marinoin integer format. 53*05a0b428SJohn Marino.Fn ilogb \*(Pm\*(If 54*05a0b428SJohn Marinoreturns 55*05a0b428SJohn Marino.Dv INT_MAX 56*05a0b428SJohn Marinoand 57*05a0b428SJohn Marino.Fn ilogb 0 58*05a0b428SJohn Marinoreturns 59*05a0b428SJohn Marino.Dv INT_MIN . 60*05a0b428SJohn MarinoThe 61*05a0b428SJohn Marino.Fn ilogbf 62*05a0b428SJohn Marinofunction is a single precision version of 63*05a0b428SJohn Marino.Fn ilogb . 64*05a0b428SJohn MarinoThe 65*05a0b428SJohn Marino.Fn ilogbl 66*05a0b428SJohn Marinofunction is an extended precision version of 67*05a0b428SJohn Marino.Fn ilogb . 68*05a0b428SJohn Marino.Sh SEE ALSO 69*05a0b428SJohn Marino.Xr ffs 3 , 70*05a0b428SJohn Marino.Xr frexp 3 71*05a0b428SJohn Marino.Sh STANDARDS 72*05a0b428SJohn Marino.St -ieee754 73*05a0b428SJohn Marino.Sh HISTORY 74*05a0b428SJohn MarinoThe 75*05a0b428SJohn Marino.Nm ilogb , 76*05a0b428SJohn Marino.Nm ilogbf 77*05a0b428SJohn Marinoand 78*05a0b428SJohn Marino.Nm ilogbl 79*05a0b428SJohn Marinofunctions appeared in 80*05a0b428SJohn Marino.Bx 4.3 , 81*05a0b428SJohn Marino.Nx 1.1 82*05a0b428SJohn Marinoand 83*05a0b428SJohn Marino.Ox 4.5 , 84*05a0b428SJohn Marinorespectively. 85