1 files changed, 32 insertions, 0 deletions
diff --git a/sysdeps/libm-ieee754/s_signbit.c b/sysdeps/libm-ieee754/s_signbit.c
new file mode 100644
index 0000000000..ee340035fb
--- /dev/null
+++ b/sysdeps/libm-ieee754/s_signbit.c
@@ -0,0 +1,32 @@
+/* Return nonzero value if number is negative.
+   Copyright (C) 1997 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <math.h>
+
+#include "math_private.h"
+
+int
+__signbit (double x)
+{
+  int32_t hx;
+
+  GET_HIGH_WORD (hx, x);
+  return hx & 0x80000000;
+}