about summary refs log tree commit diff
path: root/sysdeps/libm-ieee754/s_finitel.c
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/libm-ieee754/s_finitel.c')
-rw-r--r--sysdeps/libm-ieee754/s_finitel.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/sysdeps/libm-ieee754/s_finitel.c b/sysdeps/libm-ieee754/s_finitel.c
new file mode 100644
index 0000000000..02487c610d
--- /dev/null
+++ b/sysdeps/libm-ieee754/s_finitel.c
@@ -0,0 +1,40 @@
+/* s_finitel.c -- long double version of s_finite.c.
+ * Conversion to long double by Ulrich Drepper,
+ * Cygnus Support, drepper@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.
+ * ====================================================
+ */
+
+#if defined(LIBM_SCCS) && !defined(lint)
+static char rcsid[] = "$NetBSD: $";
+#endif
+
+/*
+ * finitel(x) returns 1 is x is finite, else 0;
+ * no branching!
+ */
+
+#include "math.h"
+#include "math_private.h"
+
+#ifdef __STDC__
+	int __finite(long double x)
+#else
+	int __finite(x)
+	long double x;
+#endif
+{
+	int32_t exp;
+	GET_LDOUBLE_EXP(exp,x);
+	return (int)((u_int32_t)((exp&0x7fff)-0x7fff)>>15);
+}
+weak_alias (__finitel, finitel)