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authorUlrich Drepper <drepper@redhat.com>2007-04-16 20:15:57 +0000
committerUlrich Drepper <drepper@redhat.com>2007-04-16 20:15:57 +0000
commita8c79c4088e8c04e4297936efa0dee6c8e6e974d (patch)
treeeff01fb1edcb8dbd7a3b40feeffc2137a5a9a00a /sysdeps/i386
parent34317254127a027848079aabdd17efa1deb9279f (diff)
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[BZ #3427]
2007-03-22 Jakub Jelinek <jakub@redhat.com> [BZ #3427] * sysdeps/x86_64/fpu/feholdexcpt.c (feholdexcept): Clear all exceptions both in SW and MXCSR. * sysdeps/x86_64/fpu/feupdateenv.c: New file. * sysdeps/x86_64/fpu/feenablxcpt.c (feenableexcept): Remove dead code. * sysdeps/x86_64/fpu/fedisblxcpt.c (fedisableexcept): Likewise. * sysdeps/i386/fpu/feholdexcpt.c (feholdexcept): Clear all exceptions in MXCSR if SSE is available. * sysdeps/i386/fpu/feupdateenv.c: Include unistd.h, dl-procinfo.h and ldsodefs.h. (__feupdateenv): Query exceptions also from MXCSR if SSE is available. Fix comment typo. * sysdeps/ia64/fpu/feholdexcpt.c (feholdexcept): Clear all exceptions. Return 0 rather than 1. * sysdeps/ia64/fpu/feupdateenv.c (feupdateenv): Fix comment typo. Remove incorrect part of a comment. Fix argument to feraiseexcept. * math/test-fenv.c (feholdexcept_tests): New function. (main): Call it. 2007-01-05 Richard B. Kreckel <kreckel@ginac.de> [BZ #3427] * sysdeps/i386/fpu/feholdexcpt.c (feholdexcept): Clear all exceptions in SW.
Diffstat (limited to 'sysdeps/i386')
-rw-r--r--sysdeps/i386/fpu/feupdateenv.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/sysdeps/i386/fpu/feupdateenv.c b/sysdeps/i386/fpu/feupdateenv.c
index a443f500bc..a58963837f 100644
--- a/sysdeps/i386/fpu/feupdateenv.c
+++ b/sysdeps/i386/fpu/feupdateenv.c
@@ -1,5 +1,5 @@
/* Install given floating-point environment and raise exceptions.
- Copyright (C) 1997,99,2000,01 Free Software Foundation, Inc.
+ Copyright (C) 1997,99,2000,01,07 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
@@ -20,20 +20,29 @@
#include <fenv.h>
#include <bp-sym.h>
+#include <unistd.h>
+#include <dl-procinfo.h>
+#include <ldsodefs.h>
int
__feupdateenv (const fenv_t *envp)
{
fexcept_t temp;
+ unsigned int xtemp = 0;
/* Save current exceptions. */
__asm__ ("fnstsw %0" : "=m" (*&temp));
- temp &= FE_ALL_EXCEPT;
+
+ /* If the CPU supports SSE we test the MXCSR as well. */
+ if ((GLRO(dl_hwcap) & HWCAP_I386_XMM) != 0)
+ __asm__ ("stmxcsr %0" : "=m" (*&xtemp));
+
+ temp = (temp | xtemp) & FE_ALL_EXCEPT;
/* Install new environment. */
fesetenv (envp);
- /* Raise the safed exception. Incidently for us the implementation
+ /* Raise the saved exception. Incidently for us the implementation
defined format of the values in objects of type fexcept_t is the
same as the ones specified using the FE_* constants. */
feraiseexcept ((int) temp);