5261 libm should stop using synonyms.h 5298 fabs is 0-sized, confuses dis(1) and others Reviewed by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net> Approved by: Gordon Ross <gwr@nexenta.com> 5262 libm needs to be carefully unifdef'd 5268 libm doesn't need to hide symbols which are already local Reviewed by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net> Reviewed by: Igor Kozhukhov <ikozhukhov@gmail.com> Reviewed by: Gordon Ross <gwr@nexenta.com> Approved by: Gordon Ross <gwr@nexenta.com>

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 #if defined(ELFOBJ) 31 #pragma weak tanhl = __tanhl 32 #endif 33 34 /* 35 * tanhl(x) returns the hyperbolic tangent of x 36 * 37 * Method : 38 * 1. reduce x to non-negative: tanhl(-x) = - tanhl(x). 39 * 2. 40 * 0 < x <= small : tanhl(x) := x 41 * -expm1l(-2x) 42 * small < x <= 1 : tanhl(x) := -------------- 43 * expm1l(-2x) + 2 44 * 2 45 * 1 <= x <= threshold : tanhl(x) := 1 - --------------- 46 * expm1l(2x) + 2 47 * threshold < x <= INF : tanhl(x) := 1. 48 * 49 * where 50 * single : small = 1.e-5 threshold = 11.0 51 * double : small = 1.e-10 threshold = 22.0 52 * quad : small = 1.e-20 threshold = 45.0 | ```
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 __tanhl = tanhl
31
32 /*
33 * tanhl(x) returns the hyperbolic tangent of x
34 *
35 * Method :
36 * 1. reduce x to non-negative: tanhl(-x) = - tanhl(x).
37 * 2.
38 * 0 < x <= small : tanhl(x) := x
39 * -expm1l(-2x)
40 * small < x <= 1 : tanhl(x) := --------------
41 * expm1l(-2x) + 2
42 * 2
43 * 1 <= x <= threshold : tanhl(x) := 1 - ---------------
44 * expm1l(2x) + 2
45 * threshold < x <= INF : tanhl(x) := 1.
46 *
47 * where
48 * single : small = 1.e-5 threshold = 11.0
49 * double : small = 1.e-10 threshold = 22.0
50 * quad : small = 1.e-20 threshold = 45.0
``` |