5261 libm should stop using synonyms.h
5298 fabs is 0-sized, confuses dis(1) and others
Reviewed by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
Approved by: Gordon Ross <gwr@nexenta.com>
5262 libm needs to be carefully unifdef'd
5268 libm doesn't need to hide symbols which are already local
Reviewed by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
Reviewed by: Igor Kozhukhov <ikozhukhov@gmail.com>
Reviewed by: Gordon Ross <gwr@nexenta.com>
Approved by: Gordon Ross <gwr@nexenta.com>

          --- old/usr/src/lib/libm/common/m9x/trunc.c
          +++ new/usr/src/lib/libm/common/m9x/trunc.c

   1    1  /*
   2    2   * CDDL HEADER START
   3    3   *
   4    4   * The contents of this file are subject to the terms of the
   5    5   * Common Development and Distribution License (the "License").
   6    6   * You may not use this file except in compliance with the License.
   7    7   *
   8    8   * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9    9   * or http://www.opensolaris.org/os/licensing.
  10   10   * See the License for the specific language governing permissions
  11   11   * and limitations under the License.
  12   12   *
  13   13   * When distributing Covered Code, include this CDDL HEADER in each
  14   14   * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15   15   * If applicable, add the following below this CDDL HEADER, with the
  16   16   * fields enclosed by brackets "[]" replaced with your own identifying
  17   17   * information: Portions Copyright [yyyy] [name of copyright owner]
  18   18   *
  19   19   * CDDL HEADER END

  20   20   */
  21   21  
  22   22  /*
  23   23   * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  24   24   */
  25   25  /*
  26   26   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  27   27   * Use is subject to license terms.
  28   28   */
  29   29  
  30      -#if defined(ELFOBJ)
  31      -#pragma weak trunc = __trunc
  32      -#endif
       30 +#pragma weak __trunc = trunc
  33   31  
  34   32  #include "libm.h"
  35   33  
  36   34  double
  37   35  trunc(double x) {
  38   36          union {
  39   37                  unsigned i[2];
  40   38                  double d;
  41   39          } xx;
  42   40          unsigned hx, sx, i;

  43   41  
  44   42          xx.d = x;
  45   43          hx = xx.i[HIWORD] & ~0x80000000;
  46   44          sx = xx.i[HIWORD] & 0x80000000;
  47   45          if (hx < 0x43300000) {  /* |x| < 2^52 */
  48   46                  if (hx < 0x3ff00000)    /* |x| < 1 */
  49   47                          return (sx ? -0.0 : 0.0);
  50   48  
  51   49                  /* chop x at the integer bit */
  52   50                  if (hx < 0x41300000) {
  53   51                          i = 1 << (0x412 - (hx >> 20));
  54   52                          xx.i[HIWORD] &= ~(i | (i - 1));
  55   53                          xx.i[LOWORD] = 0;
  56   54                  } else {
  57   55                          i = 1 << (0x432 - (hx >> 20));
  58   56                          xx.i[LOWORD] &= ~(i | (i - 1));
  59   57                  }
  60   58                  return (xx.d);
  61   59          } else if (hx < 0x7ff00000)
  62   60                  return (x);
  63   61          else
  64   62  #if defined(FPADD_TRAPS_INCOMPLETE_ON_NAN)
  65   63                  return (hx >= 0x7ff80000 ? x : x + x);
  66   64                  /* assumes sparc-like QNaN */
  67   65  #else
  68   66                  return (x + x);
  69   67  #endif
  70   68  }

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX