fegetround(3) - NetBSD Manual Pages

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FEGETROUND(3)           NetBSD 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; how-
     ever, 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 and NetBSD 6.0.  They super-
     sede the non-standard fpgetround(3) and fpsetround(3) functions.

NetBSD 8.2                        May 8, 2004                       NetBSD 8.2