| .\" Copyright (c) 2004 David Schultz <das@FreeBSD.org> |
| .\" All rights reserved. |
| .\" |
| .\" Redistribution and use in source and binary forms, with or without |
| .\" modification, are permitted provided that the following conditions |
| .\" are met: |
| .\" 1. Redistributions of source code must retain the above copyright |
| .\" notice, this list of conditions and the following disclaimer. |
| .\" 2. Redistributions in binary form must reproduce the above copyright |
| .\" notice, this list of conditions and the following disclaimer in the |
| .\" documentation and/or other materials provided with the distribution. |
| .\" |
| .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| .\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| .\" SUCH DAMAGE. |
| .\" |
| .\" $FreeBSD: src/lib/msun/man/fegetround.3,v 1.2 2005/01/14 09:12:05 ru Exp $ |
| .\" |
| .Dd May 8, 2004 |
| .Dt FEGETROUND 3 |
| .Os |
| .Sh NAME |
| .Nm fegetround , |
| .Nm fesetround |
| .Nd floating-point rounding control |
| .Sh LIBRARY |
| .Lb libm |
| .Sh SYNOPSIS |
| .In fenv.h |
| .Fd "#pragma STDC FENV_ACCESS ON" |
| .Ft int |
| .Fn fegetround void |
| .Ft int |
| .Fn fesetround "int round" |
| .Sh DESCRIPTION |
| The |
| .Fn fegetround |
| function determines the current floating-point rounding mode, |
| and the |
| .Fn fesetround |
| function sets the current rounding mode to |
| .Fa round . |
| The rounding mode is one of |
| .Dv FE_TONEAREST , FE_DOWNWARD , FE_UPWARD , |
| or |
| .Dv FE_TOWARDZERO , |
| as described in |
| .Xr fenv 3 . |
| .Sh RETURN VALUES |
| The |
| .Fn fegetround |
| routine returns the current rounding mode. |
| The |
| .Fn fesetround |
| function returns 0 on success and non-zero otherwise; |
| however, the present implementation always succeeds. |
| .Sh SEE ALSO |
| .Xr fenv 3 , |
| .Xr fpgetround 3 , |
| .Xr fpsetround 3 |
| .Sh STANDARDS |
| The |
| .Fn fegetround |
| and |
| .Fn fesetround |
| functions conform to |
| .St -isoC-99 . |
| .Sh HISTORY |
| These routines first appeared in |
| .Fx 5.3 . |
| They supersede the non-standard |
| .Xr fpgetround 3 |
| and |
| .Xr fpsetround 3 |
| functions. |