1 files changed, 28 insertions, 12 deletions
diff --git a/nuttx/lib/math/lib_pow.c b/nuttx/lib/math/lib_pow.c
index b353359eb..66f6a2d2e 100644
--- a/nuttx/lib/math/lib_pow.c
+++ b/nuttx/lib/math/lib_pow.c
@@ -1,4 +1,14 @@
-/*
+/************************************************************************
+ * lib/math/lib_pow.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, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
  * 
  * Permission to use, copy, modify, and distribute this software for any
@@ -12,19 +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 powf(float b, float e) {
-	return expf(e * logf(b));
-}
+#include <nuttx/config.h>
+#include <nuttx/compiler.h>
 
-double pow(double b, double e) {
-	return exp(e * log(b));
-}
+#include <math.h>
+
+/************************************************************************
+ * Public Functions
+ ************************************************************************/
 
-long double powl(long double b, long double e) {
-	return expl(e * logl(b));
+#if CONFIG_HAVE_DOUBLE
+double pow(double b, double e)
+{
+  return exp(e * log(b));
 }
+#endif