fegetround(3) [freebsd man page]

FEGETROUND(3)						   BSD 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.

BSD
								    May 8, 2004 							       BSD

FEGETROUND(3)						   BSD Library Functions Manual 					     FEGETROUND(3)

NAME

     fegetround, fesetround -- functions providing access to the floating-point rounding mode.

SYNOPSIS

     #include <fenv.h>
     #pragma STDC FENV_ACCESS ON

     int
     fegetround(void);

     int
     fesetround(int round);

DESCRIPTION

     These functions provide control of floating-point rounding direction modes.

     The fegetround() function gets the current rounding direction.  It returns the value of the rounding direction macro representing the current
     rounding direction, or a negative value if either there is no corresponding macro or if the rounding direction is not determinable.

     The fesetround() function sets the rounding direction to be that specified by the argument round.	If the argument is not equal to the value
     of one of the rounding direction macros, the rounding direction is not changed.  It returns zero if and only if the requested rounding direc-
     tion was established.

SEE ALSO

     fenv(3), feclearexcept(3), fegetenv(3), fegetexceptflag(3), feholdexcept(3), fesetenv(3), feraiseexcept(3), fesetexceptflag(3),
     feraiseexcept(3), feupdateenv(3)

STANDARDS

     These functions conform to ISO/IEC 9899:TC3.

BSD
								    May 9, 2011 							       BSD