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#ifdef __RESTRICT
31#define restrict _Restrict
32#else
33#define restrict
34#endif
35
36extern void __vc_exp(int, float *, int, float *, int, float *);
37extern void __vc_log(int, float *, int, float *, int);
38
39void
40__vc_pow(int n, float * restrict x, int stridex, float * restrict y,
41	int stridey, float * restrict z, int stridez, float * restrict tmp)
42{
43	float	r;
44	int		i, j, k;
45
46	__vc_log(n, x, stridex, tmp, 1);
47	stridey <<= 1;
48	for (i = j = 0; i < n; i++, j += stridey)
49	{
50		k = i << 1;
51		r = y[j] * tmp[k] - y[j+1] * tmp[k+1];
52		tmp[k+1] = y[j+1] * tmp[k] + y[j] * tmp[k+1];
53		tmp[k] = r;
54	}
55	__vc_exp(n, tmp, 1, z, stridez, tmp + n + n);
56}
57