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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.
This commit is contained in:
Ulrich Drepper 1999-11-12 17:23:30 +00:00
parent b2f46c3c0e
commit 05ef7ce90d
12 changed files with 274 additions and 1 deletions
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16
ChangeLog
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@ -1,3 +1,19 @@
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.

1
Versions.def
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@ -26,6 +26,7 @@ libm {
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

36
manual/arith.texi
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@ -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

3
math/Makefile
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@ -39,7 +39,8 @@ extra-libs-others = $(extra-libs)
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 \

4
math/Versions
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@ -158,4 +158,8 @@ libm {
feclearexcept; fegetenv; fegetexceptflag; feraiseexcept;
fesetenv; fesetexceptflag; feupdateenv;
}
GLIBC_2.2 {
# fp environment function
feenableexcept; fedisableexcept; fegetexcept;
}
}

16
math/fenv.h
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@ -115,6 +115,22 @@ extern int feupdateenv (__const fenv_t *__envp) __THROW;
# 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 */

30
sysdeps/generic/fedisblxcpt.c Normal file
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@ -0,0 +1,30 @@
/* 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>

30
sysdeps/generic/feenablxcpt.c Normal file
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@ -0,0 +1,30 @@
/* 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>

30
sysdeps/generic/fegetexcept.c Normal file
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@ -0,0 +1,30 @@
/* 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>

39
sysdeps/i386/fpu/fedisblxcpt.c Normal file
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@ -0,0 +1,39 @@
/* 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;
}

38
sysdeps/i386/fpu/feenablxcpt.c Normal file
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@ -0,0 +1,38 @@
/* 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;
}

32
sysdeps/i386/fpu/fegetexcept.c Normal file
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@ -0,0 +1,32 @@
/* 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;
}