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/frexpf.c
          +++ new/usr/src/lib/libm/common/m9x/frexpf.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 frexpf = __frexpf
  32      -#endif
  33   31  
  34   32  #include "libm.h"
  35   33  
  36   34  float
  37   35  __frexpf(float x, int *exp) {
  38   36          union {
  39   37                  unsigned i;
  40   38                  float f;
  41   39          } xx;
  42   40          unsigned hx;

  43   41          int e;
  44   42  
  45   43          xx.f = x;
  46   44          hx = xx.i & ~0x80000000;
  47   45  
  48   46          if (hx >= 0x7f800000) { /* x is infinite or NaN */
  49   47                  *exp = 0;
  50   48                  return (x);
  51   49          }
  52   50  
  53   51          e = 0;
  54   52          if (hx < 0x00800000) { /* x is subnormal or zero */
  55   53                  if (hx == 0) {
  56   54                          *exp = 0;
  57   55                          return (x);
  58   56                  }
  59   57  
  60   58                  /* normalize x by regarding it as an integer */
  61   59                  xx.f = (int) xx.i < 0 ? -(int) hx : (int) hx;
  62   60                  hx = xx.i & ~0x80000000;
  63   61                  e = -149;
  64   62          }
  65   63  
  66   64          /* now xx.f is normal */
  67   65          xx.i = (xx.i & ~0x7f800000) | 0x3f000000;
  68   66          *exp = e + (hx >> 23) - 0x7e;
  69   67          return (xx.f);
  70   68  }

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