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 exp2l = __exp2l
31
32 #include "libm.h"
33 #include "longdouble.h"
34
35 /*
36 * exp2l(x) = 2**x = 2**((x-anint(x))+anint(x))
37 * = 2**anint(x)*2**(x-anint(x))
38 * = 2**anint(x)*exp((x-anint(x))*ln2)
39 */
40
41 #define TINY 1.0e-20L /* single: 1e-5, double: 1e-10, quad: 1e-20 */
42 #define OVFLEXP 16400 /* single: 130, double 1030, quad: 16400 */
43 #define UNFLEXP -16520 /* single:-155, double -1080, quad:-16520 */
44
45 static const long double
46 zero = 0.0L,
47 tiny = TINY * TINY,
48 half = 0.5L,
49 ln2 = 6.931471805599453094172321214581765680755e-0001L,
50 one = 1.0L;
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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 __exp2l = exp2l
31
32 #include "libm.h"
33 #include "longdouble.h"
34
35 /*
36 * exp2l(x) = 2**x = 2**((x-anint(x))+anint(x))
37 * = 2**anint(x)*2**(x-anint(x))
38 * = 2**anint(x)*exp((x-anint(x))*ln2)
39 */
40
41 #define TINY 1.0e-20L /* single: 1e-5, double: 1e-10, quad: 1e-20 */
42 #define OVFLEXP 16400 /* single: 130, double 1030, quad: 16400 */
43 #define UNFLEXP -16520 /* single:-155, double -1080, quad:-16520 */
44
45 static const long double
46 zero = 0.0L,
47 tiny = TINY * TINY,
48 half = 0.5L,
49 ln2 = 6.931471805599453094172321214581765680755e-0001L,
50 one = 1.0L;
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