2 files changed, 89 insertions, 0 deletions
diff --git a/gnulib b/gnulib
deleted file mode 160000
-Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1
diff --git a/gnulib/lib/ldexpl.c b/gnulib/lib/ldexpl.c
new file mode 100644
index 0000000..7fb3a7d
--- /dev/null
+++ b/gnulib/lib/ldexpl.c
@@ -0,0 +1,89 @@
+/* Emulation for ldexpl.
+   Contributed by Paolo Bonzini
+
+   Copyright 2002-2003, 2007-2011 Free Software Foundation, Inc.
+
+   This file is part of gnulib.
+
+   This program 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 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <math.h>
+
+#if HAVE_SAME_LONG_DOUBLE_AS_DOUBLE
+
+long double
+ldexpl (long double x, int exp)
+{
+  return ldexp (x, exp);
+}
+
+#else
+
+# include <float.h>
+# include "fpucw.h"
+
+long double
+ldexpl (long double x, int exp)
+{
+  long double factor;
+  int bit;
+  DECL_LONG_DOUBLE_ROUNDING
+
+  BEGIN_LONG_DOUBLE_ROUNDING ();
+
+  /* Check for zero, nan and infinity. */
+  if (!(isnanl (x) || x + x == x))
+    {
+      if (exp < 0)
+        {
+          exp = -exp;
+          factor = 0.5L;
+        }
+      else
+        factor = 2.0L;
+
+      if (exp > 0)
+        for (bit = 1;;)
+          {
+            /* Invariant: Here bit = 2^i, factor = 2^-2^i or = 2^2^i,
+               and bit <= exp.  */
+            if (exp & bit)
+              x *= factor;
+            bit <<= 1;
+            if (bit > exp)
+              break;
+            factor = factor * factor;
+          }
+    }
+
+  END_LONG_DOUBLE_ROUNDING ();
+
+  return x;
+}
+
+#endif
+
+#if 0
+int
+main (void)
+{
+  long double x;
+  int y;
+  for (y = 0; y < 29; y++)
+    printf ("%5d %.16Lg %.16Lg\n", y, ldexpl (0.8L, y), ldexpl (0.8L, -y) * ldexpl (0.8L, y));
+}
+#endif