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 trunc = __trunc
  31 
  32 #include "libm.h"
  33 
  34 double
  35 trunc(double x) {
  36         union {
  37                 unsigned i[2];
  38                 double d;
  39         } xx;
  40         unsigned hx, sx, i;
  41 
  42         xx.d = x;
  43         hx = xx.i[HIWORD] & ~0x80000000;
  44         sx = xx.i[HIWORD] & 0x80000000;
  45         if (hx < 0x43300000) {       /* |x| < 2^52 */
  46                 if (hx < 0x3ff00000) /* |x| < 1 */
  47                         return (sx ? -0.0 : 0.0);
  48 
  49                 /* chop x at the integer bit */
  50                 if (hx < 0x41300000) {

  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 __trunc = trunc
  31 
  32 #include "libm.h"
  33 
  34 double
  35 trunc(double x) {
  36         union {
  37                 unsigned i[2];
  38                 double d;
  39         } xx;
  40         unsigned hx, sx, i;
  41 
  42         xx.d = x;
  43         hx = xx.i[HIWORD] & ~0x80000000;
  44         sx = xx.i[HIWORD] & 0x80000000;
  45         if (hx < 0x43300000) {       /* |x| < 2^52 */
  46                 if (hx < 0x3ff00000) /* |x| < 1 */
  47                         return (sx ? -0.0 : 0.0);
  48 
  49                 /* chop x at the integer bit */
  50                 if (hx < 0x41300000) {