20060303a

1 files changed, 27 insertions, 0 deletions

diff --git a/libmath/fdlibm/s_finite.c b/libmath/fdlibm/s_finite.c
new file mode 100644
index 00000000..52b36f45
--- /dev/null
+++ b/libmath/fdlibm/s_finite.c
@@ -0,0 +1,27 @@
+/* derived from /netlib/fdlibm */
+
+/* @(#)s_finite.c 1.3 95/01/18 */
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunSoft, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice 
+ * is preserved.
+ * ====================================================
+ */
+
+/*
+ * finite(x) returns 1 is x is finite, else 0;
+ * no branching!
+ */
+
+#include "fdlibm.h"
+
+	int finite(double x)
+{
+	int hx; 
+	hx = __HI(x);
+	return  (unsigned)((hx&0x7fffffff)-0x7ff00000)>>31;
+}