1.\" $NetBSD: fegetround.3,v 1.1 2010/07/31 21:47:53 joerg Exp $ 2.\" Copyright (c) 2004 David Schultz <das@FreeBSD.org> 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.Dd May 8, 2004 27.Dt FEGETROUND 3 28.Os 29.Sh NAME 30.Nm fegetround , 31.Nm fesetround 32.Nd floating-point rounding control 33.Sh LIBRARY 34.Lb libm 35.Sh SYNOPSIS 36.In fenv.h 37.Fd "#pragma STDC FENV_ACCESS ON" 38.Ft int 39.Fn fegetround void 40.Ft int 41.Fn fesetround "int round" 42.Sh DESCRIPTION 43The 44.Fn fegetround 45function determines the current floating-point rounding mode, 46and the 47.Fn fesetround 48function sets the current rounding mode to 49.Fa round . 50The rounding mode is one of 51.Dv FE_TONEAREST , FE_DOWNWARD , FE_UPWARD , 52or 53.Dv FE_TOWARDZERO , 54as described in 55.Xr fenv 3 . 56.Sh RETURN VALUES 57The 58.Fn fegetround 59routine returns the current rounding mode. 60The 61.Fn fesetround 62function returns 0 on success and non-zero otherwise; 63however, the present implementation always succeeds. 64.Sh SEE ALSO 65.Xr fenv 3 , 66.Xr fpgetround 3 , 67.Xr fpsetround 3 68.Sh STANDARDS 69The 70.Fn fegetround 71and 72.Fn fesetround 73functions conform to 74.St -isoC-99 . 75.Sh HISTORY 76These routines first appeared in 77.Fx 5.3 78and 79.Nx 6.0 . 80They supersede the non-standard 81.Xr fpgetround 3 82and 83.Xr fpsetround 3 84functions. 85