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Add femode_t functions.

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TS 18661-1 defines a type femode_t to represent the set of dynamic
floating-point control modes (such as the rounding mode and trap
enablement modes), and functions fegetmode and fesetmode to manipulate
those modes (without affecting other state such as the raised
exception flags) and a corresponding macro FE_DFL_MODE.

This patch series implements those interfaces for glibc.  This first
patch adds the architecture-independent pieces, the x86 and x86_64
implementations, and the <bits/fenv.h> and ABI baseline updates for
all architectures so glibc keeps building and passing the ABI tests on
all architectures.  Subsequent patches add the fegetmode and fesetmode
implementations for other architectures.

femode_t is generally an integer type - the same type as fenv_t, or as
the single element of fenv_t where fenv_t is a structure containing a
single integer (or the single relevant element, where it has elements
for both status and control registers) - except where architecture
properties or consistency with the fenv_t implementation indicate
otherwise.  FE_DFL_MODE follows FE_DFL_ENV in whether it's a magic
pointer value (-1 cast to const femode_t *), a value that can be
distinguished from valid pointers by its high bits but otherwise
contains a representation of the desired register contents, or a
pointer to a constant variable (the powerpc case; __fe_dfl_mode is
added as an exported constant object, an alias to __fe_dfl_env).

Note that where architectures (that share a register between control
and status bits) gain definitions of new floating-point control or
status bits in future, the implementations of fesetmode for those
architectures may need updating (depending on whether the new bits are
control or status bits and what the implementation does with
previously unknown bits), just like existing implementations of
<fenv.h> functions that take care not to touch reserved bits may need
updating when the set of reserved bits changes.  (As any new bits are
outside the scope of ISO C, that's just a quality-of-implementation
issue for supporting them, not a conformance issue.)

As with fenv_t, femode_t should properly include any software DFP
rounding mode (and for both fenv_t and femode_t I'd consider that
fragment of DFP support appropriate for inclusion in glibc even in the
absence of the rest of libdfp; hardware DFP rounding modes should
already be included if the definitions of which bits are status /
control bits are correct).

Tested for x86_64, x86, mips64 (hard float, and soft float to test the
fallback version), arm (hard float) and powerpc (hard float, soft
float and e500).  Other architecture versions are untested.

	* math/fegetmode.c: New file.
	* math/fesetmode.c: Likewise.
	* sysdeps/i386/fpu/fegetmode.c: Likewise.
	* sysdeps/i386/fpu/fesetmode.c: Likewise.
	* sysdeps/x86_64/fpu/fegetmode.c: Likewise.
	* sysdeps/x86_64/fpu/fesetmode.c: Likewise.
	* math/fenv.h: Update comment on inclusion of <bits/fenv.h>.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (fegetmode): New function
	declaration.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (fesetmode): Likewise.
	* bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New
	typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/aarch64/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/alpha/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/arm/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/hppa/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/ia64/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/m68k/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/microblaze/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/mips/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/nios2/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/powerpc/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (__fe_dfl_mode): New variable
	declaration.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/s390/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/sh/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/sparc/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/tile/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/x86/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* manual/arith.texi (FE_DFL_MODE): Document macro.
	(fegetmode): Document function.
	(fesetmode): Likewise.
	* math/Versions (fegetmode): New libm symbol at version
	GLIBC_2.25.
	(fesetmode): Likewise.
	* math/Makefile (libm-support): Add fegetmode and fesetmode.
	(tests): Add test-femode and test-femode-traps.
	* math/test-femode-traps.c: New file.
	* math/test-femode.c: Likewise.
	* sysdeps/powerpc/fpu/fenv_const.c (__fe_dfl_mode): Declare as
	alias for __fe_dfl_env.
	* sysdeps/powerpc/nofpu/fenv_const.c (__fe_dfl_mode): Likewise.
	* sysdeps/powerpc/powerpc32/e500/nofpu/fenv_const.c
	(__fe_dfl_mode): Likewise.
	* sysdeps/powerpc/Versions (__fe_dfl_mode): New libm symbol at
	version GLIBC_2.25.
	* sysdeps/nacl/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
This commit is contained in:
Joseph Myers 2016-09-07 16:40:09 +00:00
parent fb0f7a6755
commit ec94343f59
61 changed files with 978 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

113
ChangeLog
View File

@ -1,3 +1,116 @@
2016-09-07 Joseph Myers <joseph@codesourcery.com>
* math/fegetmode.c: New file.
* math/fesetmode.c: Likewise.
* sysdeps/i386/fpu/fegetmode.c: Likewise.
* sysdeps/i386/fpu/fesetmode.c: Likewise.
* sysdeps/x86_64/fpu/fegetmode.c: Likewise.
* sysdeps/x86_64/fpu/fesetmode.c: Likewise.
* math/fenv.h: Update comment on inclusion of <bits/fenv.h>.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (fegetmode): New function
declaration.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (fesetmode): Likewise.
* bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New
typedef.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
* sysdeps/aarch64/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
(femode_t): New typedef.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
* sysdeps/alpha/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
(femode_t): New typedef.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
* sysdeps/arm/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
(femode_t): New typedef.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
* sysdeps/hppa/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
(femode_t): New typedef.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
* sysdeps/ia64/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
(femode_t): New typedef.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
* sysdeps/m68k/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
(femode_t): New typedef.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
* sysdeps/microblaze/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
(femode_t): New typedef.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
* sysdeps/mips/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
(femode_t): New typedef.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
* sysdeps/nios2/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
(femode_t): New typedef.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
* sysdeps/powerpc/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
(femode_t): New typedef.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (__fe_dfl_mode): New variable
declaration.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
* sysdeps/s390/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
(femode_t): New typedef.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
* sysdeps/sh/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
(femode_t): New typedef.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
* sysdeps/sparc/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
(femode_t): New typedef.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
* sysdeps/tile/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
(femode_t): New typedef.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
* sysdeps/x86/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
(femode_t): New typedef.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
* manual/arith.texi (FE_DFL_MODE): Document macro.
(fegetmode): Document function.
(fesetmode): Likewise.
* math/Versions (fegetmode): New libm symbol at version
GLIBC_2.25.
(fesetmode): Likewise.
* math/Makefile (libm-support): Add fegetmode and fesetmode.
(tests): Add test-femode and test-femode-traps.
* math/test-femode-traps.c: New file.
* math/test-femode.c: Likewise.
* sysdeps/powerpc/fpu/fenv_const.c (__fe_dfl_mode): Declare as
alias for __fe_dfl_env.
* sysdeps/powerpc/nofpu/fenv_const.c (__fe_dfl_mode): Likewise.
* sysdeps/powerpc/powerpc32/e500/nofpu/fenv_const.c
(__fe_dfl_mode): Likewise.
* sysdeps/powerpc/Versions (__fe_dfl_mode): New libm symbol at
version GLIBC_2.25.
* sysdeps/nacl/libm.abilist: Update.
* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-09-06 H.J. Lu <hongjiu.lu@intel.com>
[BZ #20495]

5
NEWS
View File

@ -32,8 +32,9 @@ Version 2.25
presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
problem.
* The fesetexcept and fetestexceptflag functions from TS 18661-1:2014 are
added to libm.
* New <fenv.h> features from TS 18661-1:2014 are added to libm: the
fesetexcept, fetestexceptflag, fegetmode and fesetmode functions,
the femode_t type and the FE_DFL_MODE macro.
* The <sys/quota.h> header now includes the <linux/quota.h> header. Support
for the Linux quota interface which predates kernel version 2.4.22 has

8
bits/fenv.h
View File

@ -53,3 +53,11 @@ fenv_t;
/* If the default argument is used we use this value. */
#define FE_DFL_ENV ((const fenv_t *) -1l)
#if __GLIBC_USE (IEC_60559_BFP_EXT)
/* Type representing floating-point control modes. */
typedef unsigned int femode_t;
/* Default floating-point control modes. */
# define FE_DFL_MODE ((const femode_t *) -1L)
#endif

33
manual/arith.texi
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@ -1126,6 +1126,39 @@ The function returns zero in case the operation was successful, a
non-zero value otherwise.
@end deftypefun
@noindent
TS 18661-1:2014 defines additional functions to save and restore
floating-point control modes (such as the rounding mode and whether
traps are enabled) while leaving other status (such as raised flags)
unchanged.
@vindex FE_DFL_MODE
The special macro @code{FE_DFL_MODE} may be passed to
@code{fesetmode}. It represents the floating-point control modes at
program start.
@comment fenv.h
@comment ISO
@deftypefun int fegetmode (femode_t *@var{modep})
@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
Store the floating-point control modes in the variable pointed to by
@var{modep}.
The function returns zero in case the operation was successful, a
non-zero value otherwise.
@end deftypefun
@comment fenv.h
@comment ISO
@deftypefun int fesetmode (const femode_t *@var{modep})
@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
Set the floating-point control modes to those described by
@var{modep}.
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.

6
math/Makefile
View File

@ -41,7 +41,8 @@ libm-support = s_lib_version s_matherr s_signgam \
fclrexcpt fgetexcptflg fraiseexcpt fsetexcptflg \
ftestexcept fegetround fesetround fegetenv feholdexcpt \
fesetenv feupdateenv t_exp fedisblxcpt feenablxcpt \
fegetexcept fesetexcept fetestexceptflag
fegetexcept fesetexcept fetestexceptflag fegetmode \
fesetmode
# Wrappers for these functions generated per type using a file named
# <func>_template.c and the appropriate math-type-macros-<TYPE>.h.
@ -152,7 +153,8 @@ tests = test-matherr test-fenv atest-exp atest-sincos atest-exp2 basic-test \
test-signgam-uint test-signgam-uint-init test-signgam-ullong \
test-signgam-ullong-init test-nan-overflow test-nan-payload \
test-fexcept test-fexcept-traps test-fesetexcept \
test-fesetexcept-traps test-fetestexceptflag $(tests-static)
test-fesetexcept-traps test-fetestexceptflag test-femode \
test-femode-traps $(tests-static)
tests-static = test-fpucw-static test-fpucw-ieee-static \
test-signgam-uchar-static test-signgam-uchar-init-static \
test-signgam-uint-static test-signgam-uint-init-static \

2
math/Versions
View File

@ -215,6 +215,6 @@ libm {
nextdown; nextdownf; nextdownl;
}
GLIBC_2.25 {
fesetexcept; fetestexceptflag;
fesetexcept; fetestexceptflag; fegetmode; fesetmode;
}
}

27
math/fegetmode.c Normal file
View File

@ -0,0 +1,27 @@
/* Store current floating-point control modes.
Copyright (C) 2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <fenv.h>
int
fegetmode (femode_t *modep)
{
/* Nothing to do. */
return 0;
}
stub_warning (fegetmode)

18
math/fenv.h
View File

@ -38,6 +38,12 @@
fexcept_t type for object representing the floating-point exception
flags including status associated with the flags
femode_t type for object representing floating-point control modes
FE_DFL_MODE macro of type pointer to const femode_t to be used as the
argument to fesetmode; in this case the default control
modes will be used
The following macros are defined iff the implementation supports this
kind of exception.
FE_INEXACT inexact result
@ -122,6 +128,18 @@ extern int fesetenv (const fenv_t *__envp) __THROW;
extern int feupdateenv (const fenv_t *__envp) __THROW;
/* Control modes. */
#if __GLIBC_USE (IEC_60559_BFP_EXT)
/* Store the current floating-point control modes in the object
pointed to by MODEP. */
extern int fegetmode (femode_t *__modep) __THROW;
/* Establish the floating-point control modes represented by the
object pointed to by MODEP. */
extern int fesetmode (const femode_t *__modep) __THROW;
#endif
/* Include optimization. */
#ifdef __OPTIMIZE__
# include <bits/fenvinline.h>

27
math/fesetmode.c Normal file
View File

@ -0,0 +1,27 @@
/* Install given floating-point control modes.
Copyright (C) 2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <fenv.h>
int
fesetmode (const femode_t *modep)
{
/* Nothing to do. */
return 0;
}
stub_warning (fesetmode)

149
math/test-femode-traps.c Normal file
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@ -0,0 +1,149 @@
/* Test femode_t functions: test handling of exception traps.
Copyright (C) 2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <fenv.h>
#include <stdio.h>
#include <math-tests.h>
static int
test_ee (int exc1, int exc2)
{
int result = 0;
printf ("testing %x %x\n", (unsigned int) exc1, (unsigned int) exc2);
fedisableexcept (FE_ALL_EXCEPT);
int ret = feenableexcept (exc1);
if (ret == -1)
{
if (EXCEPTION_ENABLE_SUPPORTED (exc1))
{
puts ("first feenableexcept failed unexpectedly");
result = 1;
}
else
puts ("first feenableexcept failed, cannot test");
return result;
}
femode_t saved;
ret = fegetmode (&saved);
if (ret != 0)
{
puts ("fegetmode failed");
result = 1;
return result;
}
fedisableexcept (FE_ALL_EXCEPT);
ret = feenableexcept (exc2);
if (ret == -1)
{
if (EXCEPTION_ENABLE_SUPPORTED (exc2))
{
puts ("second feenableexcept failed unexpectedly");
result = 1;
}
else
puts ("second feenableexcept failed, cannot test");
return result;
}
ret = fesetmode (&saved);
if (ret != 0)
{
puts ("fesetmode failed");
result = 1;
return result;
}
/* Verify that the set of enabled traps was restored. */
ret = fegetexcept ();
if (ret != exc1)
{
printf ("restored enabled traps %x not %x\n", (unsigned int) ret,
(unsigned int) exc1);
result = 1;
}
/* Likewise, with default modes. */
ret = fesetmode (FE_DFL_MODE);
if (ret != 0)
{
puts ("fesetmode (FE_DFL_MODE) failed");
result = 1;
return result;
}
ret = fegetexcept ();
if (ret != 0)
{
printf ("FE_DFL_MODE enabled traps %x not 0\n", (unsigned int) ret);
result = 1;
}
return result;
}
static int
test_e (int exc1)
{
int result = 0;
result |= test_ee (exc1, 0);
result |= test_ee (exc1, FE_ALL_EXCEPT);
#ifdef FE_DIVBYZERO
result |= test_ee (exc1, FE_DIVBYZERO);
#endif
#ifdef FE_INEXACT
result |= test_ee (exc1, FE_INEXACT);
#endif
#ifdef FE_INVALID
result |= test_ee (exc1, FE_INVALID);
#endif
#ifdef FE_OVERFLOW
result |= test_ee (exc1, FE_OVERFLOW);
#endif
#ifdef FE_UNDERFLOW
result |= test_ee (exc1, FE_UNDERFLOW);
#endif
return result;
}
static int
do_test (void)
{
int result = 0;
result |= test_e (0);
result |= test_e (FE_ALL_EXCEPT);
#ifdef FE_DIVBYZERO
result |= test_e (FE_DIVBYZERO);
#endif
#ifdef FE_INEXACT
result |= test_e (FE_INEXACT);
#endif
#ifdef FE_INVALID
result |= test_e (FE_INVALID);
#endif
#ifdef FE_OVERFLOW
result |= test_e (FE_OVERFLOW);
#endif
#ifdef FE_UNDERFLOW
result |= test_e (FE_UNDERFLOW);
#endif
return result;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"

231
math/test-femode.c Normal file
View File

@ -0,0 +1,231 @@
/* Test femode_t functions.
Copyright (C) 2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <fenv.h>
#include <stdio.h>
#include <math-tests.h>
static int
test_mmee (int mode1, int mode2, int exc1, int exc2)
{
int result = 0;
printf ("testing %x %x %x %x\n", (unsigned int) mode1, (unsigned int) mode2,
(unsigned int) exc1, (unsigned int) exc2);
feclearexcept (FE_ALL_EXCEPT);
int ret = fesetround (mode1);
if (ret != 0)
{
if (ROUNDING_TESTS (float, mode1))
{
puts ("first fesetround failed unexpectedly");
result = 1;
}
else
puts ("first fesetround failed, cannot test");
return result;
}
ret = fesetexcept (exc1);
if (ret != 0)
{
if (EXCEPTION_TESTS (float) || exc1 == 0)
{
puts ("first fesetexcept failed unexpectedly");
result = 1;
}
else
puts ("first fesetexcept failed, cannot test");
return result;
}
femode_t saved;
ret = fegetmode (&saved);
if (ret != 0)
{
puts ("fegetmode failed");
result = 1;
return result;
}
feclearexcept (FE_ALL_EXCEPT);
ret = fesetround (mode2);
if (ret != 0)
{
if (ROUNDING_TESTS (float, mode2))
{
puts ("second fesetround failed unexpectedly");
result = 1;
}
else
puts ("second fesetround failed, cannot test");
return result;
}
ret = fesetexcept (exc2);
if (ret != 0)
{
if (EXCEPTION_TESTS (float) || exc2 == 0)
{
puts ("second fesetexcept failed unexpectedly");
result = 1;
}
else
puts ("second fesetexcept failed, cannot test");
return result;
}
ret = fesetmode (&saved);
if (ret != 0)
{
puts ("fesetmode failed");
result = 1;
return result;
}
/* Verify that the rounding mode was restored but the exception
flags remain unchanged. */
ret = fegetround ();
if (ret != mode1)
{
printf ("restored rounding mode %x not %x\n", (unsigned int) ret,
(unsigned int) mode1);
result = 1;
}
ret = fetestexcept (FE_ALL_EXCEPT);
if (ret != exc2)
{
printf ("exceptions %x not %x\n", (unsigned int) ret,
(unsigned int) exc2);
result = 1;
}
/* Likewise, with default modes. */
ret = fesetmode (FE_DFL_MODE);
if (ret != 0)
{
puts ("fesetmode (FE_DFL_MODE) failed");
result = 1;
return result;
}
ret = fegetround ();
if (ret != FE_TONEAREST)
{
printf ("FE_DFL_MODE rounding mode %x not %x\n", (unsigned int) ret,
(unsigned int) FE_TONEAREST);
result = 1;
}
ret = fetestexcept (FE_ALL_EXCEPT);
if (ret != exc2)
{
printf ("FE_DFL_MODE exceptions %x not %x\n", (unsigned int) ret,
(unsigned int) exc2);
result = 1;
}
return result;
}
static int
test_mme (int mode1, int mode2, int exc1)
{
int result = 0;
result |= test_mmee (mode1, mode2, exc1, 0);
result |= test_mmee (mode1, mode2, exc1, FE_ALL_EXCEPT);
#ifdef FE_DIVBYZERO
result |= test_mmee (mode1, mode2, exc1, FE_DIVBYZERO);
#endif
#ifdef FE_INEXACT
result |= test_mmee (mode1, mode2, exc1, FE_INEXACT);
#endif
#ifdef FE_INVALID
result |= test_mmee (mode1, mode2, exc1, FE_INVALID);
#endif
#ifdef FE_OVERFLOW
result |= test_mmee (mode1, mode2, exc1, FE_OVERFLOW);
#endif
#ifdef FE_UNDERFLOW
result |= test_mmee (mode1, mode2, exc1, FE_UNDERFLOW);
#endif
return result;
}
static int
test_mm (int mode1, int mode2)
{
int result = 0;
result |= test_mme (mode1, mode2, 0);
result |= test_mme (mode1, mode2, FE_ALL_EXCEPT);
#ifdef FE_DIVBYZERO
result |= test_mme (mode1, mode2, FE_DIVBYZERO);
#endif
#ifdef FE_INEXACT
result |= test_mme (mode1, mode2, FE_INEXACT);
#endif
#ifdef FE_INVALID
result |= test_mme (mode1, mode2, FE_INVALID);
#endif
#ifdef FE_OVERFLOW
result |= test_mme (mode1, mode2, FE_OVERFLOW);
#endif
#ifdef FE_UNDERFLOW
result |= test_mme (mode1, mode2, FE_UNDERFLOW);
#endif
return result;
}
static int
test_m (int mode1)
{
int result = 0;
#ifdef FE_DOWNWARD
result |= test_mm (mode1, FE_DOWNWARD);
#endif
#ifdef FE_TONEAREST
result |= test_mm (mode1, FE_TONEAREST);
#endif
#ifdef FE_TOWARDZERO
result |= test_mm (mode1, FE_TOWARDZERO);
#endif
#ifdef FE_UPWARD
result |= test_mm (mode1, FE_UPWARD);
#endif
return result;
}
static int
do_test (void)
{
int result = 0;
#ifdef FE_DOWNWARD
result |= test_m (FE_DOWNWARD);
#endif
#ifdef FE_TONEAREST
result |= test_m (FE_TONEAREST);
#endif
#ifdef FE_TOWARDZERO
result |= test_m (FE_TOWARDZERO);
#endif
#ifdef FE_UPWARD
result |= test_m (FE_UPWARD);
#endif
return result;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"

8
sysdeps/aarch64/bits/fenv.h
View File

@ -72,3 +72,11 @@ fenv_t;
/* Floating-point environment where none of the exceptions are masked. */
# define FE_NOMASK_ENV ((const fenv_t *) -2)
#endif
#if __GLIBC_USE (IEC_60559_BFP_EXT)
/* Type representing floating-point control modes. */
typedef unsigned int femode_t;
/* Default floating-point control modes. */
# define FE_DFL_MODE ((const femode_t *) -1L)
#endif

8
sysdeps/alpha/fpu/bits/fenv.h
View File

@ -131,3 +131,11 @@ typedef unsigned long int fenv_t;
/* The system calls to talk to the kernel's FP code. */
extern unsigned long int __ieee_get_fp_control (void) __THROW;
extern void __ieee_set_fp_control (unsigned long int __value) __THROW;
#if __GLIBC_USE (IEC_60559_BFP_EXT)
/* Type representing floating-point control modes. */
typedef unsigned long int femode_t;
/* Default floating-point control modes. */
# define FE_DFL_MODE ((const femode_t *) 0x8800000000000000UL)
#endif

8
sysdeps/arm/bits/fenv.h
View File

@ -80,3 +80,11 @@ fenv_t;
/* Floating-point environment where none of the exceptions are masked. */
# define FE_NOMASK_ENV ((const fenv_t *) -2)
#endif
#if __GLIBC_USE (IEC_60559_BFP_EXT)
/* Type representing floating-point control modes. */
typedef unsigned int femode_t;
/* Default floating-point control modes. */
# define FE_DFL_MODE ((const femode_t *) -1L)
#endif

8
sysdeps/hppa/fpu/bits/fenv.h
View File

@ -89,3 +89,11 @@ typedef struct
/* Floating-point environment where none of the exceptions are masked. */
# define FE_NOMASK_ENV ((const fenv_t *) -2)
#endif
#if __GLIBC_USE (IEC_60559_BFP_EXT)
/* Type representing floating-point control modes. */
typedef unsigned int femode_t;
/* Default floating-point control modes. */
# define FE_DFL_MODE ((const femode_t *) -1L)
#endif

32
sysdeps/i386/fpu/fegetmode.c Normal file
View File

@ -0,0 +1,32 @@
/* Store current floating-point control modes. i386 version.
Copyright (C) 2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <fenv.h>
#include <fpu_control.h>
#include <unistd.h>
#include <ldsodefs.h>
#include <dl-procinfo.h>
int
fegetmode (femode_t *modep)
{
_FPU_GETCW (modep->__control_word);
if ((GLRO(dl_hwcap) & HWCAP_I386_XMM) != 0)
__asm__ ("stmxcsr %0" : "=m" (modep->__mxcsr));
return 0;
}

54
sysdeps/i386/fpu/fesetmode.c Normal file
View File

@ -0,0 +1,54 @@
/* Install given floating-point control modes. i386 version.
Copyright (C) 2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <fenv.h>
#include <fpu_control.h>
#include <unistd.h>
#include <ldsodefs.h>
#include <dl-procinfo.h>
/* All exceptions, including the x86-specific "denormal operand"
exception. */
#define FE_ALL_EXCEPT_X86 (FE_ALL_EXCEPT | __FE_DENORM)
int
fesetmode (const femode_t *modep)
{
fpu_control_t cw;
if (modep == FE_DFL_MODE)
cw = _FPU_DEFAULT;
else
cw = modep->__control_word;
_FPU_SETCW (cw);
if ((GLRO(dl_hwcap) & HWCAP_I386_XMM) != 0)
{
unsigned int mxcsr;
__asm__ ("stmxcsr %0" : "=m" (mxcsr));
/* Preserve SSE exception flags but restore other state in
MXCSR. */
mxcsr &= FE_ALL_EXCEPT_X86;
if (modep == FE_DFL_MODE)
/* Default MXCSR state has all bits zero except for those
masking exceptions. */
mxcsr |= FE_ALL_EXCEPT_X86 << 7;
else
mxcsr |= modep->__mxcsr & ~FE_ALL_EXCEPT_X86;
__asm__ ("ldmxcsr %0" : : "m" (mxcsr));
}
return 0;
}

8
sysdeps/ia64/bits/fenv.h
View File

@ -94,3 +94,11 @@ typedef unsigned long int fenv_t;
s0, s2, and s3. */
# define FE_NONIEEE_ENV ((const fenv_t *) 0xc009a04d0270037fUL)
#endif
#if __GLIBC_USE (IEC_60559_BFP_EXT)
/* Type representing floating-point control modes. */
typedef unsigned long int femode_t;
/* Default floating-point control modes. */
# define FE_DFL_MODE ((const femode_t *) 0xc009804c0270033fUL)
#endif

8
sysdeps/m68k/fpu/bits/fenv.h
View File

@ -85,3 +85,11 @@ fenv_t;
/* Floating-point environment where none of the exceptions are masked. */
# define FE_NOMASK_ENV ((const fenv_t *) -2)
#endif
#if __GLIBC_USE (IEC_60559_BFP_EXT)
/* Type representing floating-point control modes. */
typedef unsigned int femode_t;
/* Default floating-point control modes. */
# define FE_DFL_MODE ((const femode_t *) -1L)
#endif

8
sysdeps/microblaze/bits/fenv.h
View File

@ -40,3 +40,11 @@ typedef unsigned int fenv_t;
/* If the default argument is used we use this value. */
#define FE_DFL_ENV ((const fenv_t *) -1l)
#if __GLIBC_USE (IEC_60559_BFP_EXT)
/* Type representing floating-point control modes. */
typedef unsigned int femode_t;
/* Default floating-point control modes. */
# define FE_DFL_MODE ((const femode_t *) -1L)
#endif

8
sysdeps/mips/bits/fenv.h
View File

@ -83,3 +83,11 @@ fenv_t;
/* Floating-point environment where none of the exception is masked. */
# define FE_NOMASK_ENV ((const fenv_t *) -2)
#endif
#if __GLIBC_USE (IEC_60559_BFP_EXT)
/* Type representing floating-point control modes. */
typedef unsigned int femode_t;
/* Default floating-point control modes. */
# define FE_DFL_MODE ((const femode_t *) -1L)
#endif

2
sysdeps/nacl/libm.abilist
View File

@ -380,5 +380,7 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F

8
sysdeps/nios2/bits/fenv.h
View File

@ -42,3 +42,11 @@ typedef unsigned int fenv_t;
/* If the default argument is used we use this value. */
#define FE_DFL_ENV ((const fenv_t *) -1)
#if __GLIBC_USE (IEC_60559_BFP_EXT)
/* Type representing floating-point control modes. */
typedef unsigned int femode_t;
/* Default floating-point control modes. */
# define FE_DFL_MODE ((const femode_t *) -1L)
#endif

3
sysdeps/powerpc/Versions
View File

@ -3,6 +3,9 @@ libm {
# symbols used in macros from sysdeps/powerpc/bits/fenv.h
__fe_dfl_env; __fe_enabled_env; __fe_nonieee_env; __fe_nomask_env;
}
GLIBC_2.25 {
__fe_dfl_mode;
}
}
libc {

9
sysdeps/powerpc/bits/fenv.h
View File

@ -169,3 +169,12 @@ extern const fenv_t __fe_nonieee_env;
# define FE_MASK_ENV FE_DFL_ENV
#endif
#if __GLIBC_USE (IEC_60559_BFP_EXT)
/* Type representing floating-point control modes. */
typedef double femode_t;
/* Default floating-point control modes. */
extern const femode_t __fe_dfl_mode;
# define FE_DFL_MODE (&__fe_dfl_mode)
#endif

4
sysdeps/powerpc/fpu/fenv_const.c
View File

@ -23,6 +23,10 @@
const unsigned long long __fe_dfl_env __attribute__ ((aligned (8))) =
0xfff8000000000000ULL;
/* The same representation is used for femode_t. */
extern const unsigned long long __fe_dfl_mode
__attribute__ ((aligned (8), alias ("__fe_dfl_env")));
/* Floating-point environment where none of the exceptions are masked. */
const unsigned long long __fe_enabled_env __attribute__ ((aligned (8))) =
0xfff80000000000f8ULL;

4
sysdeps/powerpc/nofpu/fenv_const.c
View File

@ -25,6 +25,10 @@
const unsigned long long __fe_dfl_env __attribute__ ((aligned (8))) =
0x000000003e000000ULL;
/* The same representation is used for femode_t. */
extern const unsigned long long __fe_dfl_mode
__attribute__ ((aligned (8), alias ("__fe_dfl_env")));
/* Floating-point environment where none of the exceptions are masked. */
const unsigned long long __fe_enabled_env __attribute__ ((aligned (8))) =
0x0000000000000000ULL;

4
sysdeps/powerpc/powerpc32/e500/nofpu/fenv_const.c
View File

@ -28,6 +28,10 @@
const unsigned long long __fe_dfl_env __attribute__ ((aligned (8))) =
0x3cULL;
/* The same representation is used for femode_t. */
extern const unsigned long long __fe_dfl_mode
__attribute__ ((aligned (8), alias ("__fe_dfl_env")));
/* Floating-point environment where none of the exceptions are masked. */
const unsigned long long __fe_enabled_env __attribute__ ((aligned (8))) =
(((unsigned long long) (PR_FP_EXC_DIV

8
sysdeps/s390/fpu/bits/fenv.h
View File

@ -90,3 +90,11 @@ typedef struct
/* Floating-point environment where none of the exceptions are masked. */
# define FE_NOMASK_ENV ((const fenv_t *) -2)
#endif
#if __GLIBC_USE (IEC_60559_BFP_EXT)
/* Type representing floating-point control modes. */
typedef unsigned int femode_t;
/* Default floating-point control modes. */
# define FE_DFL_MODE ((const femode_t *) -1L)
#endif

8
sysdeps/sh/bits/fenv.h
View File

@ -74,3 +74,11 @@ fenv_t;
/* If the default argument is used we use this value. */
#define FE_DFL_ENV ((const fenv_t *) -1)
#if __GLIBC_USE (IEC_60559_BFP_EXT)
/* Type representing floating-point control modes. */
typedef unsigned int femode_t;
/* Default floating-point control modes. */
# define FE_DFL_MODE ((const femode_t *) -1L)
#endif

8
sysdeps/sparc/fpu/bits/fenv.h
View File

@ -91,3 +91,11 @@ typedef unsigned long int fenv_t;
# define __fenv_stfsr(X) __asm__ __volatile__ ("st %%fsr,%0" : "=m" (X))
# define __fenv_ldfsr(X) __asm__ __volatile__ ("ld %0,%%fsr" : : "m" (X))
#endif
#if __GLIBC_USE (IEC_60559_BFP_EXT)
/* Type representing floating-point control modes. */
typedef unsigned long int femode_t;
/* Default floating-point control modes. */
# define FE_DFL_MODE ((const femode_t *) -1L)
#endif

8
sysdeps/tile/bits/fenv.h
View File

@ -43,3 +43,11 @@ typedef unsigned int fenv_t;
/* If the default argument is used we use this value. */
#define FE_DFL_ENV ((const fenv_t *) -1l)
#if __GLIBC_USE (IEC_60559_BFP_EXT)
/* Type representing floating-point control modes. */
typedef unsigned int femode_t;
/* Default floating-point control modes. */
# define FE_DFL_MODE ((const femode_t *) -1L)
#endif

2
sysdeps/unix/sysv/linux/aarch64/libm.abilist
View File

@ -411,5 +411,7 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F

2
sysdeps/unix/sysv/linux/alpha/libm.abilist
View File

@ -421,7 +421,9 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F
GLIBC_2.3.4 GLIBC_2.3.4 A
GLIBC_2.3.4 __c1_cabsf F

2
sysdeps/unix/sysv/linux/arm/libm.abilist
View File

@ -69,7 +69,9 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F
GLIBC_2.4 GLIBC_2.4 A
GLIBC_2.4 _LIB_VERSION D 0x4

2
sysdeps/unix/sysv/linux/hppa/libm.abilist
View File

@ -381,7 +381,9 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F
GLIBC_2.4 GLIBC_2.4 A
GLIBC_2.4 exp2l F

2
sysdeps/unix/sysv/linux/i386/libm.abilist
View File

@ -423,6 +423,8 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F
GLIBC_2.4 GLIBC_2.4 A

2
sysdeps/unix/sysv/linux/ia64/libm.abilist
View File

@ -352,6 +352,8 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F
GLIBC_2.4 GLIBC_2.4 A

2
sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist
View File

@ -69,7 +69,9 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F
GLIBC_2.4 GLIBC_2.4 A
GLIBC_2.4 _LIB_VERSION D 0x4

2
sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist
View File

@ -421,6 +421,8 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F
GLIBC_2.4 GLIBC_2.4 A

2
sysdeps/unix/sysv/linux/microblaze/libm.abilist
View File

@ -380,5 +380,7 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F

2
sysdeps/unix/sysv/linux/mips/mips32/libm.abilist
View File

@ -382,7 +382,9 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F
GLIBC_2.4 GLIBC_2.4 A
GLIBC_2.4 exp2l F

2
sysdeps/unix/sysv/linux/mips/mips64/libm.abilist
View File

@ -413,6 +413,8 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F
GLIBC_2.4 GLIBC_2.4 A

2
sysdeps/unix/sysv/linux/nios2/libm.abilist
View File

@ -380,5 +380,7 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F

3
sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist
View File

@ -422,7 +422,10 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 __fe_dfl_mode D 0x8
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F
GLIBC_2.4 GLIBC_2.4 A
GLIBC_2.4 __clog10l F

3
sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist
View File

@ -421,7 +421,10 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 __fe_dfl_mode D 0x8
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F
GLIBC_2.4 GLIBC_2.4 A
GLIBC_2.4 __clog10l F

3
sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist
View File

@ -416,5 +416,8 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 __fe_dfl_mode D 0x8
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F

3
sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist
View File

@ -97,7 +97,10 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 __fe_dfl_mode D 0x8
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F
GLIBC_2.3 GLIBC_2.3 A
GLIBC_2.3 _LIB_VERSION D 0x4

2
sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist
View File

@ -411,7 +411,9 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F
GLIBC_2.4 GLIBC_2.4 A
GLIBC_2.4 __clog10l F

2
sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist
View File

@ -409,7 +409,9 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F
GLIBC_2.4 GLIBC_2.4 A
GLIBC_2.4 __clog10l F

2
sysdeps/unix/sysv/linux/sh/libm.abilist
View File

@ -381,7 +381,9 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F
GLIBC_2.4 GLIBC_2.4 A
GLIBC_2.4 exp2l F

2
sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist
View File

@ -414,7 +414,9 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F
GLIBC_2.4 GLIBC_2.4 A
GLIBC_2.4 __clog10l F

2
sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist
View File

@ -412,6 +412,8 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F
GLIBC_2.4 GLIBC_2.4 A

2
sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist
View File

@ -381,5 +381,7 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F

2
sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist
View File

@ -381,5 +381,7 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F

2
sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist
View File

@ -381,5 +381,7 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F

2
sysdeps/unix/sysv/linux/x86_64/64/libm.abilist
View File

@ -412,6 +412,8 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F
GLIBC_2.4 GLIBC_2.4 A

2
sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist
View File

@ -411,5 +411,7 @@ GLIBC_2.24 nextup F
GLIBC_2.24 nextupf F
GLIBC_2.24 nextupl F
GLIBC_2.25 GLIBC_2.25 A
GLIBC_2.25 fegetmode F
GLIBC_2.25 fesetexcept F
GLIBC_2.25 fesetmode F
GLIBC_2.25 fetestexceptflag F

14
sysdeps/x86/fpu/bits/fenv.h
View File

@ -101,6 +101,20 @@ fenv_t;
# define FE_NOMASK_ENV ((const fenv_t *) -2)
#endif
#if __GLIBC_USE (IEC_60559_BFP_EXT)
/* Type representing floating-point control modes. */
typedef struct
{
unsigned short int __control_word;
unsigned short int __glibc_reserved;
unsigned int __mxcsr;
}
femode_t;
/* Default floating-point control modes. */
# define FE_DFL_MODE ((const femode_t *) -1L)
#endif
#ifdef __USE_EXTERN_INLINES
__BEGIN_DECLS

28
sysdeps/x86_64/fpu/fegetmode.c Normal file
View File

@ -0,0 +1,28 @@
/* Store current floating-point control modes. x86_64 version.
Copyright (C) 2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <fenv.h>
#include <fpu_control.h>
int
fegetmode (femode_t *modep)
{
_FPU_GETCW (modep->__control_word);
__asm__ ("stmxcsr %0" : "=m" (modep->__mxcsr));
return 0;
}

50
sysdeps/x86_64/fpu/fesetmode.c Normal file
View File

@ -0,0 +1,50 @@
/* Install given floating-point control modes. x86_64 version.
Copyright (C) 2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <fenv.h>
#include <fpu_control.h>
/* All exceptions, including the x86-specific "denormal operand"
exception. */
#define FE_ALL_EXCEPT_X86 (FE_ALL_EXCEPT | __FE_DENORM)
int
fesetmode (const femode_t *modep)
{
fpu_control_t cw;
unsigned int mxcsr;
__asm__ ("stmxcsr %0" : "=m" (mxcsr));
/* Preserve SSE exception flags but restore other state in
MXCSR. */
mxcsr &= FE_ALL_EXCEPT_X86;
if (modep == FE_DFL_MODE)
{
cw = _FPU_DEFAULT;
/* Default MXCSR state has all bits zero except for those
masking exceptions. */
mxcsr |= FE_ALL_EXCEPT_X86 << 7;
}
else
{
cw = modep->__control_word;
mxcsr |= modep->__mxcsr & ~FE_ALL_EXCEPT_X86;
}
_FPU_SETCW (cw);
__asm__ ("ldmxcsr %0" : : "m" (mxcsr));
return 0;
}