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>
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/LD/cbrtl.c
          +++ new/usr/src/lib/libm/common/LD/cbrtl.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      -#pragma weak cbrtl = __cbrtl
  32      -#endif
       30 +#pragma weak __cbrtl = cbrtl
  33   31  
  34   32  #include "libm.h"
  35   33  #include "longdouble.h"
  36   34  
  37   35  static const double d_one = 1.0;
  38   36  
  39   37  long double
  40   38  cbrtl(long double x) {
  41   39          long double s, t, r, w, y;
  42   40          double dx, dy;

  43   41          int *py = (int *) &dy;
  44   42          int n, m, m3, n0, sx;
  45   43  
  46   44          if (!finitel(x))
  47   45                  return (x + x);
  48   46          if (iszerol(x))
  49   47                  return (x);
  50   48          n0 = 0;
  51   49          if (*((int *) &d_one) == 0)
  52   50                  n0 = 1;
  53   51          sx = signbitl(x);
  54   52          x = fabsl(x);
  55   53          n = ilogbl(x);
  56   54          m = n / 3;
  57   55          m3 = m + m + m;
  58   56          y = scalbnl(x, -m3);
  59   57          dx = (double) y;
  60   58          dy = cbrt(dx);
  61   59          py[1 - n0] += 2;
  62   60          if (py[1 - n0] == 0)
  63   61                  py[n0] += 1;
  64   62  
  65   63          /* one step newton iteration to 113 bits with error < 0.667ulps */
  66   64          t = (long double) dy;
  67   65          t = scalbnl(t, m);
  68   66          s = t * t;
  69   67          r = x / s;
  70   68          w = t + t;
  71   69          r = (r - t) / (w + r);
  72   70          t += t * r;
  73   71  
  74   72          return (sx == 0 ? t : -t);
  75   73  }

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX