/* Store current floating-point environment and clear exceptions.
- Copyright (C) 1997, 1999, 2003, 2004, 2005 Free Software Foundation, Inc.
+ 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.
int
feholdexcept (fenv_t *envp)
{
- unsigned short int work;
+ fenv_t temp;
/* Store the environment. */
- __asm__ ("fnstenv %0" : "=m" (*envp));
+ __asm__ ("fnstenv %0" : "=m" (temp));
+ *envp = temp;
/* Now set all exceptions to non-stop. */
- work = envp->__control_word | 0x3f;
- __asm__ ("fldcw %0" : : "m" (*&work));
+ temp.__control_word |= 0x3f;
+
+ /* And clear all exceptions. */
+ temp.__status_word &= ~0x3f;
+
+ __asm__ ("fldenv %0" : : "m" (temp));
/* If the CPU supports SSE we set the MXCSR as well. */
if ((GLRO(dl_hwcap) & HWCAP_I386_XMM) != 0)
/* Get the current control word. */
__asm__ ("stmxcsr %0" : "=m" (*&xwork));
- /* Set all exceptions to non-stop. */
- xwork |= 0x1f80;
+ /* Set all exceptions to non-stop and clear them. */
+ xwork = (xwork | 0x1f80) & ~0x3f;
__asm__ ("ldmxcsr %0" : : "m" (*&xwork));
}