mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-22 10:50:07 +00:00
ef9faf1385
Continuing the fixes for C90 libm functions calling C99 fe* functions, this patch fixes the case of feholdexcept by making it a weak alias of __feholdexcept and making the affected code call __feholdexcept. Tested for x86_64 (testsuite, and that disassembly of installed shared libraries is unchanged by the patch). Also tested for ARM (soft-float) that feholdexcept failures disappear from the linknamespace test failures (fesetenv, fsetround and feupdateenv remain to be addressed to complete fixing bug 17748). [BZ #17748] * include/fenv.h (__feholdexcept): Declare. Use libm_hidden_proto. * math/feholdexcpt.c (feholdexcept): Rename to __feholdexcept and define as weak alias of __feholdexcept. Use libm_hidden_weak. * sysdeps/aarch64/fpu/feholdexcpt.c (feholdexcept): Likewise. * sysdeps/alpha/fpu/feholdexcpt.c (feholdexcept): Likewise. * sysdeps/arm/feholdexcpt.c (feholdexcept): Likewise. * sysdeps/hppa/fpu/feholdexcpt.c (feholdexcept): Likewise. * sysdeps/i386/fpu/feholdexcpt.c (feholdexcept): Likewise. * sysdeps/ia64/fpu/feholdexcpt.c (feholdexcept): Likewise. * sysdeps/m68k/fpu/feholdexcpt.c (feholdexcept): Likewise. * sysdeps/mips/fpu/feholdexcpt.c (feholdexcept): Likewise. * sysdeps/powerpc/fpu/feholdexcpt.c (feholdexcept): Likewise. * sysdeps/powerpc/nofpu/feholdexcpt.c (feholdexcept): Likewise. * sysdeps/powerpc/powerpc32/e500/nofpu/feholdexcpt.c (feholdexcept): Likewise. * sysdeps/s390/fpu/feholdexcpt.c (feholdexcept): Likewise. * sysdeps/sh/sh4/fpu/feholdexcpt.c (feholdexcept): Likewise. * sysdeps/sparc/fpu/feholdexcpt.c (feholdexcept): Likewise. * sysdeps/x86_64/fpu/feholdexcpt.c (feholdexcept): Likewise. * sysdeps/generic/math_private.h (default_libc_feholdexcept): Use __feholdexcept instead of feholdexcept. (default_libc_feholdexcept_setround): Likewise.
51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
/* Store current floating-point environment and clear exceptions.
|
|
Copyright (C) 1997-2015 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
|
|
|
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 <unistd.h>
|
|
#include <ldsodefs.h>
|
|
#include <dl-procinfo.h>
|
|
|
|
int
|
|
__feholdexcept (fenv_t *envp)
|
|
{
|
|
/* Store the environment. Recall that fnstenv has a side effect of
|
|
masking all exceptions. Then clear all exceptions. */
|
|
__asm__ volatile ("fnstenv %0; fnclex" : "=m" (*envp));
|
|
|
|
/* If the CPU supports SSE we set the MXCSR as well. */
|
|
if ((GLRO(dl_hwcap) & HWCAP_I386_XMM) != 0)
|
|
{
|
|
unsigned int xwork;
|
|
|
|
/* Get the current control word. */
|
|
__asm__ ("stmxcsr %0" : "=m" (envp->__eip));
|
|
|
|
/* Set all exceptions to non-stop and clear them. */
|
|
xwork = (envp->__eip | 0x1f80) & ~0x3f;
|
|
|
|
__asm__ ("ldmxcsr %0" : : "m" (*&xwork));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
libm_hidden_def (__feholdexcept)
|
|
weak_alias (__feholdexcept, feholdexcept)
|
|
libm_hidden_weak (feholdexcept)
|