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-rw-r--r--libm/i386/feholdexcpt.c59
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diff --git a/libm/i386/feholdexcpt.c b/libm/i386/feholdexcpt.c
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+/* Store current floating-point environment and clear exceptions.
+ Copyright (C) 1997, 1999, 2003, 2004, 2005, 2007
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <fenv.h>
+#include <unistd.h>
+
+int
+feholdexcept (fenv_t *envp)
+{
+ fenv_t temp;
+
+ /* Store the environment. */
+ __asm__ ("fnstenv %0" : "=m" (temp));
+ *envp = temp;
+
+ /* Now set all exceptions to non-stop. */
+ temp.__control_word |= 0x3f;
+
+ /* And clear all exceptions. */
+ temp.__status_word &= ~0x3f;
+
+ __asm__ ("fldenv %0" : : "m" (temp));
+
+#if 0
+ /* 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" (*&xwork));
+
+ /* Set all exceptions to non-stop and clear them. */
+ xwork = (xwork | 0x1f80) & ~0x3f;
+
+ __asm__ ("ldmxcsr %0" : : "m" (*&xwork));
+ }
+#endif
+
+ return 0;
+}