Manual Pages for UNIX Operating System command usage for man fegetround

Mathematical Library Functions                     fegetround(3M)



NAME
     fegetround, fesetround - get and set current rounding direc-
     tion

SYNOPSIS
     c99 [ flag... ] file... -lm [ library... ]
     #include 

     int fegetround(void);


     int fesetround(int round);


DESCRIPTION
     The fegetround function gets the current rounding direction.


     The fesetround function establishes the  rounding  direction
     represented  by  its  argument round. If the argument is not
     equal to the value of a rounding direction macro, the round-
     ing direction is not changed.

RETURN VALUES
     The fegetround function returns the value  of  the  rounding
     direction macro representing the current rounding direction,
     or a negative value if there is no such  rounding  direction
     macro or the current rounding direction is not determinable.


     The fesetround function returns a 0 value if and only if the
     requested rounding direction was established.

ERRORS
     No errors are defined.

EXAMPLES
     The following example saves, sets, and restores the rounding
     direction,  reporting  an  error and aborting if setting the
     rounding direction fails:

     Example 1 Save, set, and restore the rounding direction.

       #include 
       #include 
       void f(int round_dir)
       {
             #pragma STDC FENV_ACCESS ON
             int save_round;
             int setround_ok;
             save_round = fegetround();
             setround_ok = fesetround(round_dir);



SunOS 5.11          Last change: 12 Jul 2006                    1






Mathematical Library Functions                     fegetround(3M)



             assert(setround_ok == 0);
             /* ... */
             fesetround(save_round);
             /* ... */
       }


ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|
    | MT-Level                    | MT-Safe                     |
    |_____________________________|_____________________________|
    | Standard                    | See standards(5).           |
    |_____________________________|_____________________________|


SEE ALSO
     fenv.h(3HEAD), attributes(5), standards(5)





























SunOS 5.11          Last change: 12 Jul 2006                    2