1 files changed, 48 insertions, 0 deletions
diff --git a/gcc-4.2.1/libstdc++-v3/libmath/signbitl.c b/gcc-4.2.1/libstdc++-v3/libmath/signbitl.c
new file mode 100644
index 000000000..52cbfbad4
--- /dev/null
+++ b/gcc-4.2.1/libstdc++-v3/libmath/signbitl.c
@@ -0,0 +1,48 @@
+/* Return nonzero value if number is negative. */
+
+/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
+
+   This file is part of the GNU ISO C++ Library.  This library is free
+   software; you can redistribute it and/or modify it under the
+   terms of the GNU General Public License as published by the
+   Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License along
+   with this library; see the file COPYING.  If not, write to the Free
+   Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+   USA.
+
+   As a special exception, you may use this file as part of a free software
+   library without restriction.  Specifically, if other files instantiate
+   templates or use macros or inline functions from this file, or you compile
+   this file and link it with other files to produce an executable, this
+   file does not by itself cause the resulting executable to be covered by
+   the GNU General Public License.  This exception does not however
+   invalidate any other reasons why the executable file might be covered by
+   the GNU General Public License.  */
+
+#include <float.h>
+#include <math.h>
+#include "mathconf.h"
+
+int
+__signbitl (long double x)
+{
+#if LDBL_MANT_DIG == 113
+  Int64_t msw;
+
+  GET_LDOUBLE_MSW64 (msw, x);
+  return msw < 0;
+#else
+  Int32_t e;
+
+  GET_LDOUBLE_EXP (e, x);
+  return e & 0x8000;
+#endif
+}