xref: /illumos-gate/usr/src/lib/libmvec/common/__vz_exp.c (revision 1ed6b69a5ca1ca3ee5e9a4931f74e2237c7e1c9f)
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 
36 extern void __vexp(int, double *, int, double *, int);
37 extern void __vsincos(int, double *, int, double *, int, double *, int);
38 
39 void
40 __vz_exp(int n, double * restrict x, int stridex, double * restrict y,
41 	int stridey, double * restrict tmp)
42 {
43 	int		i, j;
44 
45 	stridex <<= 1;
46 	stridey <<= 1;
47 	__vexp(n, x, stridex, tmp, 1);
48 	__vsincos(n, x + 1, stridex, y + 1, stridey, y, stridey);
49 	for (i = j = 0; i < n; i++, j += stridey)
50 	{
51 		y[j] *= tmp[i];
52 		y[j+1] *= tmp[i];
53 	}
54 }
55