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 ilogb = __ilogb
31
32 #include "libm.h"
33 #include "xpg6.h" /* __xpg6 */
34
35 #if defined(__x86)
36 static const double two52 = 4503599627370496.0;
37 #else
38 /*
39 * v: high part of a non-zero subnormal |x|; w: low part of |x|
40 */
41 static int
42 ilogb_subnormal(unsigned v, unsigned w) {
43 int r = -1022 - 52;
44
45 if (v)
46 r += 32;
47 else
48 v = w;
49 if (v & 0xffff0000)
50 r += 16, v >>= 16;
|
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 __ilogb = ilogb
31
32 #include "libm.h"
33 #include "xpg6.h" /* __xpg6 */
34
35 #if defined(__x86)
36 static const double two52 = 4503599627370496.0;
37 #else
38 /*
39 * v: high part of a non-zero subnormal |x|; w: low part of |x|
40 */
41 static int
42 ilogb_subnormal(unsigned v, unsigned w) {
43 int r = -1022 - 52;
44
45 if (v)
46 r += 32;
47 else
48 v = w;
49 if (v & 0xffff0000)
50 r += 16, v >>= 16;
|