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 #if defined(ELFOBJ)
  31 #pragma weak nearbyint = __nearbyint
  32 #endif
  33 
  34 /*
  35  * nearbyint(x) returns the nearest fp integer to x in the direction
  36  * corresponding to the current rounding direction without raising
  37  * the inexact exception.
  38  *
  39  * nearbyint(x) is x unchanged if x is +/-0 or +/-inf.  If x is NaN,
  40  * nearbyint(x) is also NaN.
  41  */
  42 
  43 #include "libm.h"
  44 #include "fenv_synonyms.h"
  45 #include <fenv.h>
  46 
  47 double
  48 __nearbyint(double x) {
  49         union {
  50                 unsigned i[2];
  51                 double d;
  52         } xx;
  53         unsigned hx, sx, i, frac;
  54         int rm, j;
  55 
  56         xx.d = x;
  57         sx = xx.i[HIWORD] & 0x80000000;
  58         hx = xx.i[HIWORD] & ~0x80000000;
  59 
  60         /* handle trivial cases */
  61         if (hx >= 0x43300000) {      /* x is nan, inf, or already integral */
  62                 if (hx >= 0x7ff00000)        /* x is inf or nan */
  63 #if defined(FPADD_TRAPS_INCOMPLETE_ON_NAN)
  64                         return (hx >= 0x7ff80000 ? x : x + x);

  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 nearbyint = __nearbyint

  31 
  32 /*
  33  * nearbyint(x) returns the nearest fp integer to x in the direction
  34  * corresponding to the current rounding direction without raising
  35  * the inexact exception.
  36  *
  37  * nearbyint(x) is x unchanged if x is +/-0 or +/-inf.  If x is NaN,
  38  * nearbyint(x) is also NaN.
  39  */
  40 
  41 #include "libm.h"

  42 #include <fenv.h>
  43 
  44 double
  45 __nearbyint(double x) {
  46         union {
  47                 unsigned i[2];
  48                 double d;
  49         } xx;
  50         unsigned hx, sx, i, frac;
  51         int rm, j;
  52 
  53         xx.d = x;
  54         sx = xx.i[HIWORD] & 0x80000000;
  55         hx = xx.i[HIWORD] & ~0x80000000;
  56 
  57         /* handle trivial cases */
  58         if (hx >= 0x43300000) {      /* x is nan, inf, or already integral */
  59                 if (hx >= 0x7ff00000)        /* x is inf or nan */
  60 #if defined(FPADD_TRAPS_INCOMPLETE_ON_NAN)
  61                         return (hx >= 0x7ff80000 ? x : x + x);