5261 libm should stop using synonyms.h

          --- old/usr/src/lib/libm/common/Q/cbrtl.c
          +++ new/usr/src/lib/libm/common/Q/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      -#pragma weak cbrtl = __cbrtl
       30 +#pragma weak __cbrtl = cbrtl
  31   31  
  32   32  #include "libm.h"
  33   33  #include "longdouble.h"
  34   34  
  35   35  #define n0      0
  36   36  
  37   37  long double
  38   38  cbrtl(long double x) {
  39   39          long double s, t, r, w, y;
  40   40          double dx, dy;

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

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