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 significand = __significand
31
32 #include "libm.h"
33
34 double
35 significand(double x) {
36 int ix = ((int *) &x)[HIWORD] & ~0x80000000;
37
38 /* weed out 0/+-Inf/NaN because C99 ilogb raises invalid on them */
39 if ((ix | ((int *) &x)[LOWORD]) == 0 || ix >= 0x7ff00000)
40 #if defined(FPADD_TRAPS_INCOMPLETE_ON_NAN)
41 return ((ix & 0x80000) != 0 ? x : x + x);
42 /* assumes sparc-like QNaN */
43 #else
44 return (x + x);
45 #endif
46 else
47 return (scalbn(x, -ilogb(x)));
48 }
|
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 __significand = significand
31
32 #include "libm.h"
33
34 double
35 significand(double x) {
36 int ix = ((int *) &x)[HIWORD] & ~0x80000000;
37
38 /* weed out 0/+-Inf/NaN because C99 ilogb raises invalid on them */
39 if ((ix | ((int *) &x)[LOWORD]) == 0 || ix >= 0x7ff00000)
40 #if defined(FPADD_TRAPS_INCOMPLETE_ON_NAN)
41 return ((ix & 0x80000) != 0 ? x : x + x);
42 /* assumes sparc-like QNaN */
43 #else
44 return (x + x);
45 #endif
46 else
47 return (scalbn(x, -ilogb(x)));
48 }
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