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FEGETROUND(3) FreeBSD Library Functions Manual FEGETROUND(3)
NAME
fegetround, fesetround - floating-point rounding control
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <fenv.h>
#pragma STDC FENV_ACCESS ON
int
fegetround(void);
int
fesetround(int round);
DESCRIPTION
The fegetround() function determines the current floating-point rounding
mode, and the fesetround() function sets the current rounding mode to
round. The rounding mode is one of FE_TONEAREST, FE_DOWNWARD, FE_UPWARD,
or FE_TOWARDZERO, as described in fenv(3).
RETURN VALUES
The fegetround() routine returns the current rounding mode. The
fesetround() function returns 0 on success and non-zero otherwise;
however, the present implementation always succeeds.
SEE ALSO
fenv(3), fpgetround(3), fpsetround(3)
STANDARDS
The fegetround() and fesetround() functions conform to ISO/IEC 9899:1999
("ISO C99").
HISTORY
These routines first appeared in FreeBSD 5.3. They supersede the non-
standard fpgetround(3) and fpsetround(3) functions.
FreeBSD 14.0-RELEASE-p6 May 8, 2004 FreeBSD 14.0-RELEASE-p6