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/R/nextafterf.c
          +++ new/usr/src/lib/libm/common/R/nextafterf.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 nextafterf = __nextafterf
  32      -#endif
       30 +#pragma weak __nextafterf = nextafterf
  33   31  
  34   32  #include "libm.h"
  35   33  
  36   34  float
  37   35  nextafterf(float x, float y) {
  38   36          float w;
  39   37          int *pw = (int *) &w;
  40   38          int *px = (int *) &x;
  41   39          int *py = (int *) &y;
  42   40          int ix, iy, iz;

  43   41  
  44   42          ix = px[0];
  45   43          iy = py[0];
  46   44          if ((ix & ~0x80000000) > 0x7f800000)
  47   45                  return (x * y);         /* + -> * for Cheetah */
  48   46          if ((iy & ~0x80000000) > 0x7f800000)
  49   47                  return (y * x);         /* + -> * for Cheetah */
  50   48          if (ix == iy || (ix | iy) == 0x80000000)
  51   49                  return (y);             /* C99 requirement */
  52   50          if ((ix & ~0x80000000) == 0)
  53   51                  iz = 1 | (iy & 0x80000000);
  54   52          else if (ix > 0) {
  55   53                  if (ix > iy)
  56   54                          iz = ix - 1;
  57   55                  else
  58   56                          iz = ix + 1;
  59   57          } else {
  60   58                  if (iy < 0 && ix < iy)
  61   59                          iz = ix + 1;
  62   60                  else
  63   61                          iz = ix - 1;
  64   62          }
  65   63          pw[0] = iz;
  66   64          ix = iz & 0x7f800000;
  67   65          if (ix == 0x7f800000) {
  68   66                  /* raise overflow */
  69   67                  volatile float t;
  70   68  
  71   69                  *(int *) &t = 0x7f7fffff;
  72   70                  t *= t;
  73   71          } else if (ix == 0) {
  74   72                  /* raise underflow */
  75   73                  volatile float t;
  76   74  
  77   75                  *(int *) &t = 0x00800000;
  78   76                  t *= t;
  79   77          }
  80   78          return (w);
  81   79  }

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX