initial check-in, version 0.5.0 v0.5.0

1 files changed, 31 insertions, 0 deletions

diff --git a/src/math/e_scalbf.c b/src/math/e_scalbf.c
new file mode 100644
index 00000000..de7d7f67
--- /dev/null
+++ b/src/math/e_scalbf.c
@@ -0,0 +1,31 @@
+/* e_scalbf.c -- float version of e_scalb.c.
+ * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
+ */
+
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+#include <math.h>
+#include "math_private.h"
+
+float
+scalbf(float x, float fn)
+{
+        if (isnan(x)||isnan(fn)) return x*fn;
+        if (!isfinite(fn)) {
+            if(fn>(float)0.0) return x*fn;
+            else       return x/(-fn);
+        }
+        if (rintf(fn)!=fn) return (fn-fn)/(fn-fn);
+        if ( fn > (float)65000.0) return scalbnf(x, 65000);
+        if (-fn > (float)65000.0) return scalbnf(x,-65000);
+        return scalbnf(x,(int)fn);
+}