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 atanhl = __atanhl
31
32 #include "libm.h"
33
34 /*
35 * 1 2x x
36 * atanhl(x) = --- * LOG(1 + -------) = 0.5 * log1pl(2 * --------)
37 * 2 1 - x 1 - x
38 * Note: to guarantee atanhl(-x) = -atanhl(x), we use
39 * sign(x) |x|
40 * atanhl(x) = ------- * log1pl(2*-------).
41 * 2 1 - |x|
42 *
43 * Special cases:
44 * atanhl(x) is NaN if |x| > 1 with signal;
45 * atanhl(NaN) is that NaN with no signal;
46 * atanhl(+-1) is +-INF with signal.
47 *
48 */
49
50 static const long double zero = 0.0L, half = 0.5L, one = 1.0L;
|
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 __atanhl = atanhl
31
32 #include "libm.h"
33
34 /*
35 * 1 2x x
36 * atanhl(x) = --- * LOG(1 + -------) = 0.5 * log1pl(2 * --------)
37 * 2 1 - x 1 - x
38 * Note: to guarantee atanhl(-x) = -atanhl(x), we use
39 * sign(x) |x|
40 * atanhl(x) = ------- * log1pl(2*-------).
41 * 2 1 - |x|
42 *
43 * Special cases:
44 * atanhl(x) is NaN if |x| > 1 with signal;
45 * atanhl(NaN) is that NaN with no signal;
46 * atanhl(+-1) is +-INF with signal.
47 *
48 */
49
50 static const long double zero = 0.0L, half = 0.5L, one = 1.0L;
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