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/Q/ieee_funcl.c
          +++ new/usr/src/lib/libm/common/Q/ieee_funcl.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 isinfl = __isinfl
  32      -#pragma weak isnormall = __isnormall
  33      -#pragma weak issubnormall = __issubnormall
  34      -#pragma weak iszerol = __iszerol
  35      -#pragma weak signbitl = __signbitl
  36      -#endif
  37      -
  38   30  #include "libm.h"
  39   31  
  40   32  #if defined(__sparc)
  41   33  int
  42   34  isinfl(long double x) {
  43   35          int *px = (int *) &x;
  44   36          return ((px[0] & ~0x80000000) == 0x7fff0000 && px[1] == 0 &&
  45   37                  px[2] == 0 && px[3] == 0);
  46   38  }
  47   39  

  48   40  int
  49   41  isnormall(long double x) {
  50   42          int *px = (int *) &x;
  51   43          return ((unsigned) ((px[0] & 0x7fff0000) - 0x10000) < 0x7ffe0000);
  52   44  }
  53   45  
  54   46  int
  55   47  issubnormall(long double x) {
  56   48          int *px = (int *) &x;
  57   49          px[0] &= ~0x80000000;
  58   50          return (px[0] < 0x00010000 && (px[0] | px[1] | px[2] | px[3]) != 0);
  59   51  }
  60   52  
  61   53  int
  62   54  iszerol(long double x) {
  63   55          int *px = (int *) &x;
  64   56          return (((px[0] & ~0x80000000) | px[1] | px[2] | px[3]) == 0);
  65   57  }
  66   58  
  67   59  int
  68   60  signbitl(long double x) {
  69   61          unsigned *px = (unsigned *) &x;
  70   62          return (px[0] >> 31);
  71   63  }
  72   64  #elif defined(__x86)
  73   65  int
  74   66  isinfl(long double x) {
  75   67          int *px = (int *) &x;
  76   68  #if defined(HANDLE_UNSUPPORTED)
  77   69          return ((px[2] & 0x7fff) == 0x7fff &&
  78   70                  ((px[1] ^ 0x80000000) | px[0]) == 0);
  79   71  #else
  80   72          return ((px[2] & 0x7fff) == 0x7fff &&
  81   73                  ((px[1] & ~0x80000000) | px[0]) == 0);
  82   74  #endif
  83   75  }
  84   76  
  85   77  int
  86   78  isnormall(long double x) {
  87   79          int *px = (int *) &x;
  88   80  #if defined(HANDLE_UNSUPPORTED)
  89   81          return ((unsigned) ((px[2] & 0x7fff) - 1) < 0x7ffe &&
  90   82                  (px[1] & 0x80000000) != 0);
  91   83  #else
  92   84          return ((unsigned) ((px[2] & 0x7fff) - 1) < 0x7ffe);
  93   85  #endif
  94   86  }
  95   87  
  96   88  int
  97   89  issubnormall(long double x) {
  98   90          int *px = (int *) &x;
  99   91          return ((px[2] & 0x7fff) == 0 && (px[0] | px[1]) != 0);
 100   92  }
 101   93  
 102   94  int
 103   95  iszerol(long double x) {
 104   96          int *px = (int *) &x;
 105   97          return (((px[2] & 0x7fff) | px[0] | px[1]) == 0);
 106   98  }
 107   99  
 108  100  int
 109  101  signbitl(long double x) {
 110  102          unsigned *px = (unsigned *) &x;
 111  103          return ((px[2] >> 15) & 1);
 112  104  }
 113  105  #endif  /* defined(__sparc) || defined(__x86) */

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