1 files changed, 54 insertions, 0 deletions
diff --git a/usr/src/lib/libm/common/LD/isnanl.c b/usr/src/lib/libm/common/LD/isnanl.c
new file mode 100644
index 0000000000..eb94eb32b9
--- /dev/null
+++ b/usr/src/lib/libm/common/LD/isnanl.c
@@ -0,0 +1,54 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
+ */
+/*
+ * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#if defined(ELFOBJ)
+#pragma weak isnanl = __isnanl
+#endif
+
+#include "libm.h"
+
+#if defined(__sparc)
+int
+isnanl(long double x) {
+	int *px = (int *) &x;
+	return ((px[0] & ~0x80000000) >= 0x7fff0000 &&
+		((px[0] & ~0xffff0000) | px[1] | px[2] | px[3]) != 0);
+}
+#elif defined(__x86)
+int
+isnanl(long double x) {
+	int *px = (int *) &x, t = px[2] & 0x7fff;
+#if defined(HANDLE_UNSUPPORTED)
+	return ((t == 0x7fff && ((px[1] & ~0x80000000) | px[0]) != 0) ||
+		(t != 0 && (px[1] & 0x80000000) == 0));
+#else
+	return (t == 0x7fff && ((px[1] & ~0x80000000) | px[0]) != 0);
+#endif
+}
+#endif	/* defined(__sparc) || defined(__x86) */