1 files changed, 33 insertions, 0 deletions
diff --git a/sysdeps/x86_64/fpu/fegetround.c b/sysdeps/x86_64/fpu/fegetround.c
new file mode 100644
index 0000000000..f237b18d1d
--- /dev/null
+++ b/sysdeps/x86_64/fpu/fegetround.c
@@ -0,0 +1,33 @@
+/* Return current rounding direction.
+   Copyright (C) 1997, 2001 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>
+
+int
+fegetround (void)
+{
+  int cw;
+  /* We only check the x87 FPU unit.  The SSE unit should be the same
+     - and if it's not the same there's no way to signal it.  */
+
+  __asm__ ("fnstcw %0" : "=m" (*&cw));
+
+  return cw & 0xc00;
+}