1 files changed, 41 insertions, 0 deletions
diff --git a/sysdeps/x86_64/fpu/feholdexcpt.c b/sysdeps/x86_64/fpu/feholdexcpt.c
new file mode 100644
index 0000000000..db53d0f07f
--- /dev/null
+++ b/sysdeps/x86_64/fpu/feholdexcpt.c
@@ -0,0 +1,41 @@
+/* Store current floating-point environment and clear exceptions.
+   Copyright (C) 2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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>
+
+int
+feholdexcept (fenv_t *envp)
+{
+  unsigned short int work;
+  unsigned int mxcsr;
+
+  /* Store the environment.  */
+  __asm__ ("fnstenv %0\n"
+	   "stmxcsr %1" : "=m" (*envp), "=m" (envp->__mxcsr));
+
+  /* Now set all exceptions to non-stop, first the x87 FPU.  */
+  work = envp->__control_word | 0x3f;
+  __asm__ ("fldcw %0" : : "m" (*&work));
+
+  /* Set the SSE MXCSR register.  */
+  mxcsr = envp->__mxcsr | 0x1f80;
+  __asm__ ("ldmxcsr %0" : : "m" (*&mxcsr));
+
+  return 0;
+}