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 logbl = __logbl
  31 
  32 #include "libm.h"
  33 #include "xpg6.h"       /* __xpg6 */
  34 #define _C99SUSv3_logb  _C99SUSv3_logb_subnormal_is_like_ilogb
  35 
  36 #if defined(__sparc)
  37 #define ISNORMALL(k, x) (k != 0x7fff)                   /* assuming k != 0 */
  38 #define X86PDNRM(k, x)
  39 #define XSCALE_OFFSET   0x406f                          /* 0x3fff + 112 */
  40 static const long double xscale = 5192296858534827628530496329220096.0L;
  41                                                                 /* 2^112 */
  42 #elif defined(__x86)
  43 /*
  44  * if pseudo-denormal, replace by the equivalent normal
  45  */
  46 #define X86PDNRM(k, x)  if (k == 0 && (((int *) &x)[1] & 0x80000000) != 0) \
  47                                 ((int *) &x)[2] |= k = 1
  48 #if defined(HANDLE_UNSUPPORTED)                         /* assuming k != 0 */
  49 #define ISNORMALL(k, x) (k != 0x7fff && (((int *) &x)[1] & 0x80000000) != 0)
  50 #else

  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 __logbl = logbl
  31 
  32 #include "libm.h"
  33 #include "xpg6.h"       /* __xpg6 */
  34 #define _C99SUSv3_logb  _C99SUSv3_logb_subnormal_is_like_ilogb
  35 
  36 #if defined(__sparc)
  37 #define ISNORMALL(k, x) (k != 0x7fff)                   /* assuming k != 0 */
  38 #define X86PDNRM(k, x)
  39 #define XSCALE_OFFSET   0x406f                          /* 0x3fff + 112 */
  40 static const long double xscale = 5192296858534827628530496329220096.0L;
  41                                                                 /* 2^112 */
  42 #elif defined(__x86)
  43 /*
  44  * if pseudo-denormal, replace by the equivalent normal
  45  */
  46 #define X86PDNRM(k, x)  if (k == 0 && (((int *) &x)[1] & 0x80000000) != 0) \
  47                                 ((int *) &x)[2] |= k = 1
  48 #if defined(HANDLE_UNSUPPORTED)                         /* assuming k != 0 */
  49 #define ISNORMALL(k, x) (k != 0x7fff && (((int *) &x)[1] & 0x80000000) != 0)
  50 #else