+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.
+
1999-11-01 Wolfram Gloger <wg@malloc.de>
* malloc/malloc.h: Describe __malloc_initialize_hook.
GLIBC_2.0
GLIBC_2.1 GLIBC_2.0
GLIBC_2.1.3 GLIBC_2.1
+ GLIBC_2.2 GLIBC_2.1.3
}
libmachuser {
GLIBC_2.0
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
libm-support = k_standard s_lib_version s_matherr s_signgam \
fclrexcpt fgetexcptflg fraiseexcpt fsetexcptflg \
ftestexcept fegetround fesetround fegetenv feholdexcpt \
- fesetenv feupdateenv t_exp
+ fesetenv feupdateenv t_exp fedisblxcpt feenablxcpt \
+ fegetexcept
libm-calls = e_acos e_acosh e_asin e_atan2 e_atanh e_cosh e_exp e_fmod \
e_hypot e_j0 e_j1 e_jn e_lgamma_r e_log e_log10 e_pow \
e_rem_pio2 e_remainder e_scalb e_sinh e_sqrt e_gamma_r \
feclearexcept; fegetenv; fegetexceptflag; feraiseexcept;
fesetenv; fesetexceptflag; feupdateenv;
}
+ GLIBC_2.2 {
+ # fp environment function
+ feenableexcept; fedisableexcept; fegetexcept;
+ }
}
# include <bits/fenvinline.h>
#endif
+#ifdef __USE_GNU
+
+/* Enable individual exceptions. Will not enable more exceptions than
+ EXCEPTS specifies. Returns the previous enabled exceptions if all
+ exceptions are successfull set, otherwise returns -1. */
+extern int feenableexcept (int __excepts) __THROW;
+
+/* Disable individual exceptions. Will not disable more exceptions than
+ EXCEPTS specifies. Returns the previous enabled exceptions if all
+ exceptions are successfull disabled, otherwise returns -1. */
+extern int fedisableexcept (int __excepts) __THROW;
+
+/* Return enabled exceptions. */
+extern int fegetexcept (void) __THROW;
+#endif
+
__END_DECLS
#endif /* fenv.h */
--- /dev/null
+/* Disable floating-point exceptions.
+ Copyright (C) 1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Andreas Jaeger <aj@suse.de>, 1999.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <fenv.h>
+
+int
+fedisableexcept (int excepts)
+{
+ /* Signal failure. */
+ return -1;
+}
+stub_warning (fedisableexcept)
+#include <stub-tag.h>
--- /dev/null
+/* Enable floating-point exceptions.
+ Copyright (C) 1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Andreas Jaeger <aj@suse.de>, 1999.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <fenv.h>
+
+int
+feenableexcept (int excepts)
+{
+ /* Signal failure. */
+ return -1;
+}
+stub_warning (feenableexcept)
+#include <stub-tag.h>
--- /dev/null
+/* Get floating-point exceptions.
+ Copyright (C) 1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Andreas Jaeger <aj@suse.de>, 1999.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <fenv.h>
+
+int
+fegetexcept (void)
+{
+ /* Signal failure. */
+ return -1;
+}
+stub_warning (fegetexcept)
+#include <stub-tag.h>
--- /dev/null
+/* Disable floating-point exceptions.
+ Copyright (C) 1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Andreas Jaeger <aj@suse.de>, 1999.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <fenv.h>
+
+int
+fedisableexcept (int excepts)
+{
+ unsigned short int new_exc, old_exc;
+
+ /* Get the current control word. */
+ __asm__ ("fstcw %0" : "=m" (*&new_exc));
+
+ old_exc = new_exc & FE_ALL_EXCEPT;
+
+ excepts &= FE_ALL_EXCEPT;
+
+ new_exc &= ~excepts;
+ __asm__ ("fldcw %0" : : "m" (*&new_exc));
+
+ return old_exc;
+}
--- /dev/null
+/* Enable floating-point exceptions.
+ Copyright (C) 1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Andreas Jaeger <aj@suse.de>, 1999.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <fenv.h>
+
+int
+feenableexcept (int excepts)
+{
+ unsigned short int new_exc, old_exc;
+
+ /* Get the current control word. */
+ __asm__ ("fstcw %0" : "=m" (*&new_exc));
+
+ excepts &= FE_ALL_EXCEPT;
+ old_exc = new_exc & FE_ALL_EXCEPT;
+
+ new_exc |= excepts;
+ __asm__ ("fldcw %0" : : "m" (*&new_exc));
+
+ return old_exc;
+}
--- /dev/null
+/* Get enabled floating-point exceptions.
+ Copyright (C) 1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Andreas Jaeger <aj@suse.de>, 1999.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <fenv.h>
+
+int
+fegetexcept (void)
+{
+ unsigned short int exc;
+
+ /* Get the current control word. */
+ __asm__ ("fstcw %0" : "=m" (*&exc));
+
+ return exc & FE_ALL_EXCEPT;
+}
projects / external / glibc.git / commitdiff