1 files changed, 28 insertions, 13 deletions
diff --git a/nuttx/lib/math/lib_ldexp.c b/nuttx/lib/math/lib_ldexp.c
index 2ca79221a..ca428dc07 100644
--- a/nuttx/lib/math/lib_ldexp.c
+++ b/nuttx/lib/math/lib_ldexp.c
@@ -1,4 +1,14 @@
-/*
+/************************************************************************
+ * lib/math/lib_ldexp.c
+ *
+ * This file is a part of NuttX:
+ *
+ *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+ *   Ported by: Darcy Gong
+ *
+ * It derives from the Rhombs OS math library by Nick Johnson which has
+ * a compatibile, MIT-style license:
+ *
  * Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
  * 
  * Permission to use, copy, modify, and distribute this software for any
@@ -12,20 +22,25 @@
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
+ *
+ ************************************************************************/
 
-#include <apps/math.h>
-#include <float.h>
+/************************************************************************
+ * Included Files
+ ************************************************************************/
 
-float ldexpf(float x, int n) {
-	return (x * powf(2.0, (float) n));
-}
+#include <nuttx/config.h>
+#include <nuttx/compiler.h>
 
-double ldexp(double x, int n) {
-	return (x * pow(2.0, (double) n));
-}
+#include <math.h>
 
-long double ldexpl(long double x, int n) {
-	return (x * powl(2.0, (long double) n));
-}
+/************************************************************************
+ * Public Functions
+ ************************************************************************/
 
+#if CONFIG_HAVE_DOUBLE
+double ldexp(double x, int n)
+{
+  return (x * pow(2.0, (double)n));
+}
+#endif