1 files changed, 60 insertions, 0 deletions
diff --git a/ports/sysdeps/m68k/m680x0/fpu/e_scalb.c b/ports/sysdeps/m68k/m680x0/fpu/e_scalb.c
new file mode 100644
index 0000000000..db49fdf097
--- /dev/null
+++ b/ports/sysdeps/m68k/m680x0/fpu/e_scalb.c
@@ -0,0 +1,60 @@
+/* Copyright (C) 1997, 1999, 2011 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>.
+
+   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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <math.h>
+#include <math_private.h>
+#include "mathimpl.h"
+
+#ifndef SUFF
+#define SUFF
+#endif
+#ifndef float_type
+#define float_type double
+#endif
+
+#define CONCATX(a,b) __CONCAT(a,b)
+#define s(name) CONCATX(name,SUFF)
+#define m81(func) __m81_u(s(func))
+
+float_type
+s(__ieee754_scalb) (float_type x, float_type fn)
+{
+  float_type retval;
+  unsigned long x_cond = __m81_test (x);
+  unsigned long fn_cond = __m81_test (fn);
+
+  if ((x_cond | fn_cond) & __M81_COND_NAN)
+    return x * fn;
+
+  if (fn_cond & __M81_COND_INF)
+    {
+      if (!(fn_cond & __M81_COND_NEG))
+	return x * fn;
+      else if (x_cond & __M81_COND_ZERO)
+	return x;
+      else
+	return x / -fn;
+    }
+
+  if (m81(__rint) (fn) != fn)
+    return (x - x) / (x - x);
+
+  __asm ("fscale%.x %1, %0" : "=f" (retval) : "f" (fn), "0" (x));
+  return retval;
+}
+strong_alias (s(__ieee754_scalb), CONCATX (s(__scalb), _finite))