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 acoshl = __acoshl
32 #endif
33
34 #include "libm.h"
35
36 static const long double
37 zero = 0.0L,
38 ln2 = 6.931471805599453094172321214581765680755e-0001L,
39 one = 1.0L,
40 big = 1.e+20L;
41
42 long double
43 acoshl(long double x) {
44 long double t;
45
46 if (isnanl(x))
47 return (x + x);
48 else if (x > big)
49 return (logl(x) + ln2);
50 else if (x > one) {
51 t = sqrtl(x - one);
52 return (log1pl(t * (t + sqrtl(x + one))));
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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 __acoshl = acoshl
31
32 #include "libm.h"
33
34 static const long double
35 zero = 0.0L,
36 ln2 = 6.931471805599453094172321214581765680755e-0001L,
37 one = 1.0L,
38 big = 1.e+20L;
39
40 long double
41 acoshl(long double x) {
42 long double t;
43
44 if (isnanl(x))
45 return (x + x);
46 else if (x > big)
47 return (logl(x) + ln2);
48 else if (x > one) {
49 t = sqrtl(x - one);
50 return (log1pl(t * (t + sqrtl(x + one))));
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