693 Opensource replacement of sunwlibm

Reviewed by: Igor Kozhukhov ikozhukhov@gmail.com
Reviewed by: Keith M Wesolowski <keith.wesolowski@joyent.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Approved by: Dan McDonald <danmcd@omniti.com>

1 files changed, 64 insertions, 0 deletions

diff --git a/usr/src/lib/libm/common/R/hypotf.c b/usr/src/lib/libm/common/R/hypotf.c
new file mode 100644
index 0000000000..87729c5344
--- /dev/null
+++ b/usr/src/lib/libm/common/R/hypotf.c
@@ -0,0 +1,64 @@
+/*
+ * 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.
+ */
+
+#pragma weak hypotf = __hypotf
+
+#include "libm.h"
+
+float
+hypotf(float x, float y) {
+	double dx, dy;
+	float w;
+	int ix, iy;
+
+	ix = (*(int *) &x) & 0x7fffffff;
+	iy = (*(int *) &y) & 0x7fffffff;
+	if (ix >= 0x7f800000) {
+		if (ix == 0x7f800000)
+			*(int *) &w = x == y ? iy : ix;	/* w = |x| = inf */
+		else if (iy == 0x7f800000)
+			*(int *) &w = x == y ? ix : iy;	/* w = |y| = inf */
+		else
+			w = fabsf(x) * fabsf(y);	/* + -> * for Cheetah */
+	} else if (iy >= 0x7f800000) {
+		if (iy == 0x7f800000)
+			*(int *) &w = x == y ? ix : iy;	/* w = |y| = inf */
+		else
+			w = fabsf(x) * fabsf(y);	/* + -> * for Cheetah */
+	} else if (ix == 0)
+		*(int *) &w = iy;	/* w = |y|  */
+	else if (iy == 0)
+		*(int *) &w = ix;	/* w = |x|  */
+	else {
+		dx = (double) x;
+		dy = (double) y;
+		w = (float) sqrt(dx * dx + dy * dy);
+	}
+	return (w);
+}