--- 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   30  #if defined(ELFOBJ)
  31   31  #pragma weak cbrtl = __cbrtl
  32   32  #endif
  33   33  
  34   34  #include "libm.h"
       35 +#include "longdouble.h"
  35   36  
  36   37  static const double d_one = 1.0;
  37   38  
  38   39  long double
  39   40  cbrtl(long double x) {
  40   41          long double s, t, r, w, y;
  41   42          double dx, dy;
  42   43          int *py = (int *) &dy;
  43   44          int n, m, m3, n0, sx;
  44   45  

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

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