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/fmax.c
          +++ new/usr/src/lib/libm/common/m9x/fmax.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 fmax = __fmax
  32      -#endif
  33   31  
  34   32  /*
  35   33   * fmax(x,y) returns the larger of x and y.  If just one of the
  36   34   * arguments is NaN, fmax returns the other argument.  If both
  37   35   * arguments are NaN, fmax returns NaN.
  38   36   *
  39   37   * See fmaxf.c for a discussion of implementation trade-offs.
  40   38   */
  41   39  
  42   40  #include "libm.h"       /* for isgreaterequal macro */

  43   41  #include <fenv.h>
  44   42  
  45   43  double
  46   44  __fmax(double x, double y) {
  47   45          union {
  48   46                  unsigned i[2];
  49   47                  double d;
  50   48          } xx, yy;
  51   49          unsigned s;
  52   50  
  53   51          /* if y is nan, replace it by x */
  54   52          if (y != y)
  55   53                  y = x;
  56   54  
  57   55          /* if x is nan, replace it by y */
  58   56          if (x != x)
  59   57                  x = y;
  60   58  
  61   59          /* At this point, x and y are either both numeric, or both NaN */
  62   60          if (!isnan(x) && !isgreaterequal(x, y))
  63   61                  x = y;
  64   62  
  65   63          /*
  66   64           * clear the sign of the result if either x or y has its sign clear
  67   65           */
  68   66          xx.d = x;
  69   67          yy.d = y;
  70   68  #if defined(__sparc)
  71   69          s = ~(xx.i[0] & yy.i[0]) & 0x80000000;
  72   70          xx.i[0] &= ~s;
  73   71  #elif defined(__x86)
  74   72          s = ~(xx.i[1] & yy.i[1]) & 0x80000000;
  75   73          xx.i[1] &= ~s;
  76   74  #else
  77   75  #error Unknown architecture
  78   76  #endif
  79   77  
  80   78          return (xx.d);
  81   79  }

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX