FreeBSD 7.0 manual page repository

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fegetround, fesetround - floating-point rounding control

 

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).
      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.
      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.
 

Sections

Based on BSD UNIX
FreeBSD is an advanced operating system for x86 compatible (including Pentium and Athlon), amd64 compatible (including Opteron, Athlon64, and EM64T), UltraSPARC, IA-64, PC-98 and ARM architectures. It is derived from BSD, the version of UNIX developed at the University of California, Berkeley. It is developed and maintained by a large team of individuals. Additional platforms are in various stages of development.