1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
24 */
25 /*
26 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
27 * Use is subject to license terms.
28 */
29
30 #pragma weak __hypotf = hypotf
31
32 #include "libm.h"
33
34 float
hypotf(float x,float y)35 hypotf(float x, float y) {
36 double dx, dy;
37 float w;
38 int ix, iy;
39
40 ix = (*(int *) &x) & 0x7fffffff;
41 iy = (*(int *) &y) & 0x7fffffff;
42 if (ix >= 0x7f800000) {
43 if (ix == 0x7f800000)
44 *(int *) &w = x == y ? iy : ix; /* w = |x| = inf */
45 else if (iy == 0x7f800000)
46 *(int *) &w = x == y ? ix : iy; /* w = |y| = inf */
47 else
48 w = fabsf(x) * fabsf(y); /* + -> * for Cheetah */
49 } else if (iy >= 0x7f800000) {
50 if (iy == 0x7f800000)
51 *(int *) &w = x == y ? ix : iy; /* w = |y| = inf */
52 else
53 w = fabsf(x) * fabsf(y); /* + -> * for Cheetah */
54 } else if (ix == 0)
55 *(int *) &w = iy; /* w = |y| */
56 else if (iy == 0)
57 *(int *) &w = ix; /* w = |x| */
58 else {
59 dx = (double) x;
60 dy = (double) y;
61 w = (float) sqrt(dx * dx + dy * dy);
62 }
63 return (w);
64 }
65