1 files changed, 51 insertions, 0 deletions
diff --git a/usr/src/lib/libm/common/C/atan2pi.c b/usr/src/lib/libm/common/C/atan2pi.c
new file mode 100644
index 0000000000..759dd1f489
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+++ b/usr/src/lib/libm/common/C/atan2pi.c
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+/*
+ * 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 2005 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma weak atan2pi = __atan2pi
+
+/*
+ * atan2pi(x) = atan2(x)/pi
+ */
+
+#include "libm.h"
+
+static const double invpi = 0.3183098861837906715377675;
+
+double
+atan2pi(double y, double x) {
+	int	ix, iy;
+
+	if (x == 0.0 && y == 0.0) {
+		ix = ((int *)&x)[HIWORD];
+		iy = ((int *)&y)[HIWORD];
+		if (ix >= 0)
+			return (y);
+		return ((iy >= 0)? 1.0 : -1.0);
+	}
+	return (atan2(y, x) * invpi);
+}