Copyright (c) 2004 David Schultz <das@FreeBSD.org>
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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$FreeBSD$
.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 n 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.
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.
$FreeBSD$
.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 n 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.