1 files changed, 35 insertions, 0 deletions
diff --git a/libm/s_finite.c b/libm/s_finite.c
new file mode 100644
index 000000000..91711db55
--- /dev/null
+++ b/libm/s_finite.c
@@ -0,0 +1,35 @@
+/* @(#)s_finite.c 5.1 93/09/24 */
+/*
+ * ====================================================
+ * 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.
+ * ====================================================
+ */
+
+#if defined(LIBM_SCCS) && !defined(lint)
+static char rcsid[] = "$NetBSD: s_finite.c,v 1.8 1995/05/10 20:47:17 jtc Exp $";
+#endif
+
+/*
+ * finite(x) returns 1 is x is finite, else 0;
+ * no branching!
+ */
+
+#include "math.h"
+#include "math_private.h"
+
+#ifdef __STDC__
+	int finite(double x)
+#else
+	int finite(x)
+	double x;
+#endif
+{
+	int32_t hx;
+	GET_HIGH_WORD(hx,x);
+	return (int)((u_int32_t)((hx&0x7fffffff)-0x7ff00000)>>31);
+}