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/frexpl.c
          +++ new/usr/src/lib/libm/common/m9x/frexpl.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   30  #pragma weak frexpl = __frexpl
  32      -#endif
  33   31  
  34   32  #include "libm.h"
  35   33  
  36   34  #if defined(__sparc)
  37   35  
  38   36  long double
  39   37  __frexpl(long double x, int *exp) {
  40   38          union {
  41   39                  unsigned i[4];
  42   40                  long double q;

  43   41          } xx;
  44   42          unsigned hx;
  45   43          int e, s;
  46   44  
  47   45          xx.q = x;
  48   46          hx = xx.i[0] & ~0x80000000;
  49   47  
  50   48          if (hx >= 0x7fff0000) { /* x is infinite or NaN */
  51   49                  *exp = 0;
  52   50                  return (x);
  53   51          }
  54   52  
  55   53          e = 0;
  56   54          if (hx < 0x00010000) {  /* x is subnormal or zero */
  57   55                  if ((hx | xx.i[1] | xx.i[2] | xx.i[3]) == 0) {
  58   56                          *exp = 0;
  59   57                          return (x);
  60   58                  }
  61   59  
  62   60                  /* normalize x */
  63   61                  s = xx.i[0] & 0x80000000;
  64   62                  while ((hx | (xx.i[1] & 0xffff0000)) == 0) {
  65   63                          hx = xx.i[1];
  66   64                          xx.i[1] = xx.i[2];
  67   65                          xx.i[2] = xx.i[3];
  68   66                          xx.i[3] = 0;
  69   67                          e -= 32;
  70   68                  }
  71   69                  while (hx < 0x10000) {
  72   70                          hx = (hx << 1) | (xx.i[1] >> 31);
  73   71                          xx.i[1] = (xx.i[1] << 1) | (xx.i[2] >> 31);
  74   72                          xx.i[2] = (xx.i[2] << 1) | (xx.i[3] >> 31);
  75   73                          xx.i[3] <<= 1;
  76   74                          e--;
  77   75                  }
  78   76                  xx.i[0] = s | hx;
  79   77          }
  80   78  
  81   79          /* now xx.q is normal */
  82   80          xx.i[0] = (xx.i[0] & ~0x7fff0000) | 0x3ffe0000;
  83   81          *exp = e + (hx >> 16) - 0x3ffe;
  84   82          return (xx.q);
  85   83  }
  86   84  
  87   85  #elif defined(__x86)
  88   86  
  89   87  long double
  90   88  __frexpl(long double x, int *exp) {
  91   89          union {
  92   90                  unsigned i[3];
  93   91                  long double e;
  94   92          } xx;
  95   93          unsigned hx;
  96   94          int e;
  97   95  
  98   96          xx.e = x;
  99   97          hx = xx.i[2] & 0x7fff;
 100   98  
 101   99          if (hx >= 0x7fff) {     /* x is infinite or NaN */
 102  100                  *exp = 0;
 103  101                  return (x);
 104  102          }
 105  103  
 106  104          e = 0;
 107  105          if (hx < 0x0001) {      /* x is subnormal or zero */
 108  106                  if ((xx.i[0] | xx.i[1]) == 0) {
 109  107                          *exp = 0;
 110  108                          return (x);
 111  109                  }
 112  110  
 113  111                  /* normalize x */
 114  112                  xx.e *= 18446744073709551616.0L;        /* 2^64 */
 115  113                  hx = xx.i[2] & 0x7fff;
 116  114                  e = -64;
 117  115          }
 118  116  
 119  117          /* now xx.e is normal */
 120  118          xx.i[2] = (xx.i[2] & 0x8000) | 0x3ffe;
 121  119          *exp = e + hx - 0x3ffe;
 122  120          return (xx.e);
 123  121  }
 124  122  
 125  123  #else
 126  124  #error Unknown architecture
 127  125  #endif

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