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/fminf.c
          +++ new/usr/src/lib/libm/common/m9x/fminf.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 fminf = __fminf
  32      -#endif
  33   31  
  34   32  #include "libm.h"       /* for islessequal macro */
  35   33  
  36   34  float
  37   35  __fminf(float x, float y) {
  38   36          /*
  39   37           * On SPARC v8plus/v9, this could be implemented as follows
  40   38           * (assuming %f0 = x, %f1 = y, return value left in %f0):
  41   39           *
  42   40           * fcmps        %fcc0,%f1,%f1

  43   41           * fmovsu       %fcc0,%f0,%f1
  44   42           * fcmps        %fcc0,%f0,%f1
  45   43           * fmovsug      %fcc0,%f1,%f0
  46   44           * st           %f0,[x]
  47   45           * st           %f1,[y]
  48   46           * ld           [x],%l0
  49   47           * ld           [y],%l1
  50   48           * or           %l0,%l1,%l2
  51   49           * sethi        %hi(0x80000000),%l3
  52   50           * and          %l3,%l2,%l2
  53   51           * or           %l0,%l2,%l0
  54   52           * st           %l0,[x]
  55   53           * ld           [x],%f0
  56   54           *
  57   55           * If VIS instructions are available, use this code instead:
  58   56           *
  59   57           * fcmps        %fcc0,%f1,%f1
  60   58           * fmovsu       %fcc0,%f0,%f1
  61   59           * fcmps        %fcc0,%f0,%f1
  62   60           * fmovsug      %fcc0,%f1,%f0
  63   61           * fors         %f0,%f1,%f2
  64   62           * fzeros       %f3
  65   63           * fnegs        %f3,%f3
  66   64           * fands        %f3,%f2,%f2
  67   65           * fors         %f0,%f2,%f0
  68   66           *
  69   67           * If VIS 3.0 instructions are available, use this:
  70   68           *
  71   69           * flcmps       %fcc0,%f0,%f1
  72   70           * fmovsge      %fcc0,%f1,%f0   ! move if %fcc0 is 0 or 2
  73   71           */
  74   72  
  75   73          union {
  76   74                  unsigned i;
  77   75                  float f;
  78   76          } xx, yy;
  79   77          unsigned s;
  80   78  
  81   79          /* if y is nan, replace it by x */
  82   80          if (y != y)
  83   81                  y = x;
  84   82  
  85   83          /* if x is nan, replace it by y */
  86   84          if (x != x)
  87   85                  x = y;
  88   86  
  89   87          /* At this point, x and y are either both numeric, or both NaN */
  90   88          if (!isnan(x) && !islessequal(x, y))
  91   89                  x = y;
  92   90  
  93   91          /*
  94   92           * set the sign of the result if either x or y has its sign set
  95   93           */
  96   94          xx.f = x;
  97   95          yy.f = y;
  98   96          s = (xx.i | yy.i) & 0x80000000;
  99   97          xx.i |= s;
 100   98  
 101   99          return (xx.f);
 102  100  }

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