Manual Pages for UNIX Operating System command usage for man fex_merge_flags

Mathematical Library Functions                fex_merge_flags(3M)



NAME
     fex_merge_flags - manage the floating point environment

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

     void fex_merge_flags(const fenv_t *envp);


DESCRIPTION
     The  fex_merge_flags()  function  copies  into  the  current
     environment  those  exception  flags  that  are  set  in the
     environment represented by the object pointed  to  by  envp.
     The  argument  envp must point to an object set by a call to
     feholdexcept(3M) or  fegetenv(3M)  or  equal  to  the  macro
     FE_DFL_ENV.   The  fex_merge_flags() function does not raise
     any exceptions, but only sets its flags.

RETURN VALUES
     The fex_merge_flags function does not return a value.

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



     _____________________________________________________________
    | ATTRIBUTE TYPE                ATTRIBUTE VALUE              |
    | Availability                  system/library/math, SUNWlmsx|
    | Interface Stability           Committed                    |
    | MT-Level                      MT-Safe                      |
    |____________________________________________________________|


SEE ALSO
     feclearexcept(3M),       fegetenv(3M),       fesetround(3M),
     fesetprec(3M), fex_set_handling(3M), fex_set_log(3M), attri-
     butes(5)


     Numerical Computation Guide

NOTES
     In a multithreaded program, the  fex_merge_flags()  function
     affects  the floating point environment only for the calling
     thread.


     The fex_merge_flags() function  automatically  installs  and
     deinstalls  SIGFPE  handlers  and  sets  and clears the trap



SunOS 5.11          Last change: 12 Jul 2006                    1






Mathematical Library Functions                fex_merge_flags(3M)



     enable mode bits in the floating point  status  register  as
     needed.   If  a program uses these functions and attempts to
     install a SIGFPE handler or control  the  trap  enable  mode
     bits independently, the resulting behavior is not defined.



















































SunOS 5.11          Last change: 12 Jul 2006                    2