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>

          --- old/usr/src/lib/libm/common/R/erff.c
          +++ new/usr/src/lib/libm/common/R/erff.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   * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  23   23   */
  24   24  /*
  25   25   * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  26   26   * Use is subject to license terms.
  27   27   */
  28   28  
  29      -#pragma weak erff = __erff
  30      -#pragma weak erfcf = __erfcf
       29 +#pragma weak __erff = erff
       30 +#pragma weak __erfcf = erfcf
  31   31  
  32   32  #include "libm.h"
  33   33  
  34   34  #if defined(__i386) && !defined(__amd64)
  35   35  extern int __swapRP(int);
  36   36  #endif
  37   37  
  38   38  float
  39   39  erff(float x) {
  40   40          int     ix;

  41   41  
  42   42          ix = *(int *)&x & ~0x80000000;
  43   43          if (ix > 0x7f800000)    /* x is NaN */
  44   44                  return (x * x);
  45   45          return ((float)erf((double)x));
  46   46  }
  47   47  
  48   48  float
  49   49  erfcf(float x) {
  50   50          float   f;
  51   51          int     ix;
  52   52  #if defined(__i386) && !defined(__amd64)
  53   53          int     rp;
  54   54  #endif
  55   55  
  56   56          ix = *(int *)&x & ~0x80000000;
  57   57          if (ix > 0x7f800000)    /* x is NaN */
  58   58                  return (x * x);
  59   59  
  60   60  #if defined(__i386) && !defined(__amd64)
  61   61          rp = __swapRP(fp_extended);
  62   62  #endif
  63   63          f = (float)erfc((double)x);
  64   64  #if defined(__i386) && !defined(__amd64)
  65   65          if (rp != fp_extended)
  66   66                  (void) __swapRP(rp);
  67   67  #endif
  68   68          return (f);
  69   69  }

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