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| author | Ulrich Drepper <drepper@redhat.com> | 1999-11-12 17:23:30 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 1999-11-12 17:23:30 +0000 |
| commit | 05ef7ce90dbb9125cdcd6ea2525efad6d1c585b7 (patch) | |
| tree | 5102b915804cf59ef63ca6a05a2cba1127cfe649 /manual/arith.texi | |
| parent | b2f46c3c0e2119545e52a01e1d73a93d21ebbc0d (diff) | |
| download | glibc-05ef7ce90dbb9125cdcd6ea2525efad6d1c585b7.tar glibc-05ef7ce90dbb9125cdcd6ea2525efad6d1c585b7.tar.gz glibc-05ef7ce90dbb9125cdcd6ea2525efad6d1c585b7.tar.bz2 glibc-05ef7ce90dbb9125cdcd6ea2525efad6d1c585b7.zip | |
Update.
1999-11-02 Andreas Jaeger <aj@suse.de>
* Versions.def: Add version GLIBC_2.2 for libm.
* math/fenv.h: Add prototypes for fegetexcept, feenableexcept and
fedisableexcept.
* sysdeps/generic/feenablxcpt.c: Stub file.
* sysdeps/generic/fedisblxcpt.c: Stub file.
* sysdeps/generic/fegetexcept.c: Stub file.
* sysdeps/i386/fpu/fedisblxcpt.c: New file.
* sysdeps/i386/fpu/feenablxcpt.c: New file.
* sysdeps/i386/fpu/fegetexcept.c: New file.
* math/Makefile (libm-support): Add new files.
* math/Versions: Add new functions with version GLIBC_2.2.
* manual/arith.texi (Control Functions): Document fegetexcept,
feenableexcept and fedisableexcept.
Diffstat (limited to 'manual/arith.texi')
| -rw-r--r-- | manual/arith.texi | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/manual/arith.texi b/manual/arith.texi index 51d67a99d1..a7d6944b1f 100644 --- a/manual/arith.texi +++ b/manual/arith.texi @@ -828,6 +828,42 @@ The function returns zero in case the operation was successful, a non-zero value otherwise. @end deftypefun +@noindent +To control for individual exceptions if raising them causes a trap to +occur, you can use the following two functions. + +@strong{Portability Note:} These functions are all GNU extensions. + +@comment fenv.h +@comment GNU +@deftypefun int feenableexcept (int @var{excepts}) +This functions enables traps for each of the exceptions as indicated by +the parameter @var{except}. The individual excepetions are described in +@ref{Examining the FPU status word}. Only the specified exceptions are +enabled, the status of the other exceptions is not changed. + +The function returns the previous enabled exceptions in case the +operation was successful, @code{-1} otherwise. +@end deftypefun + +@comment fenv.h +@comment GNU +@deftypefun int fedisableexcept (int @var{excepts}) +This functions disables traps for each of the exceptions as indicated by +the parameter @var{except}. The individual excepetions are described in +@ref{Examining the FPU status word}. Only the specified exceptions are +disabled, the status of the other exceptions is not changed. + +The function returns the previous enabled exceptions in case the +operation was successful, @code{-1} otherwise. +@end deftypefun + +@comment fenv.h +@comment GNU +@deftypefun int fegetexcept (int @var{excepts}) +The function returns a bitmask of all currently enabled exceptions. It +returns @code{-1} in case of failure. + @node Arithmetic Functions @section Arithmetic Functions |