1 files changed, 52 insertions, 0 deletions
diff --git a/usr/src/lib/libm/common/R/atan2pif.c b/usr/src/lib/libm/common/R/atan2pif.c
new file mode 100644
index 0000000000..76f104db17
--- /dev/null
+++ b/usr/src/lib/libm/common/R/atan2pif.c
@@ -0,0 +1,52 @@
+/*
+ * 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 atan2pif = __atan2pif
+
+#include "libm.h"
+
+static const double invpi = 0.3183098861837906715377675;
+
+float
+atan2pif(float y, float x) {
+	int	ix, iy, hx, hy;
+
+	ix = *(int *)&x;
+	iy = *(int *)&y;
+	hx = ix & ~0x80000000;
+	hy = iy & ~0x80000000;
+	if (hx > 0x7f800000 || hy > 0x7f800000) /* x or y is nan */
+		return (x * y);
+	if ((hx | hy) == 0) {
+		/* x and y are both zero */
+		if (ix == 0)
+			return (y);
+		return ((iy == 0)? 1.0f : -1.0f);
+	}
+	return ((float)(invpi * atan2((double)y, (double)x)));
+}