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 scalbln = __scalbln
31
32 #include "libm.h"
33 #include <float.h> /* DBL_MAX, DBL_MIN */
34
35 static const double twom54 = 5.5511151231257827021181583404541015625e-17;
36 #if defined(__x86)
37 static const double two52 = 4503599627370496.0;
38 #else
39 /*
40 * Normalize non-zero subnormal x and return biased exponent of x in [-51,0]
41 */
42 static int
43 ilogb_biased(unsigned *px) {
44 int s = 52;
45 unsigned v = px[HIWORD] & ~0x80000000, w = px[LOWORD], t = v;
46
47 if (t)
48 s -= 32;
49 else
50 t = w;
|
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 __scalbln = scalbln
31
32 #include "libm.h"
33 #include <float.h> /* DBL_MAX, DBL_MIN */
34
35 static const double twom54 = 5.5511151231257827021181583404541015625e-17;
36 #if defined(__x86)
37 static const double two52 = 4503599627370496.0;
38 #else
39 /*
40 * Normalize non-zero subnormal x and return biased exponent of x in [-51,0]
41 */
42 static int
43 ilogb_biased(unsigned *px) {
44 int s = 52;
45 unsigned v = px[HIWORD] & ~0x80000000, w = px[LOWORD], t = v;
46
47 if (t)
48 s -= 32;
49 else
50 t = w;
|