NAME
fegetround,
fesetround —
floating-point rounding
control
LIBRARY
library “libm”
SYNOPSIS
#include
<fenv.h>
#pragma STDC FENV_ACCESS ON
int
fegetround(void);
int
fesetround(int
round);
DESCRIPTION
Thefegetround()
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
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.