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-rw-r--r--libm/i386/fsetexcptflg.c62
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diff --git a/libm/i386/fsetexcptflg.c b/libm/i386/fsetexcptflg.c
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+/* Set floating-point environment exception handling.
+ Copyright (C) 1997,99,2000,01, 2004 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 <math.h>
+#include <unistd.h>
+
+int
+fesetexceptflag (const fexcept_t *flagp, int excepts)
+{
+ fenv_t temp;
+
+ /* Get the current environment. We have to do this since we cannot
+ separately set the status word. */
+ __asm__ ("fnstenv %0" : "=m" (*&temp));
+
+ temp.__status_word &= ~(excepts & FE_ALL_EXCEPT);
+ temp.__status_word |= *flagp & excepts & FE_ALL_EXCEPT;
+
+ /* Store the new status word (along with the rest of the environment.
+ Possibly new exceptions are set but they won't get executed unless
+ the next floating-point instruction. */
+ __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 xnew_exc;
+
+ /* Get the current MXCSR. */
+ __asm__ ("stmxcsr %0" : "=m" (*&xnew_exc));
+
+ /* Set the relevant bits. */
+ xnew_exc &= ~(excepts & FE_ALL_EXCEPT);
+ xnew_exc |= *flagp & excepts & FE_ALL_EXCEPT;
+
+ /* Put the new data in effect. */
+ __asm__ ("ldmxcsr %0" : : "m" (*&xnew_exc));
+ }
+#endif
+
+ /* Success. */
+ return 0;
+}