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/complex/cacoshl.c
          +++ new/usr/src/lib/libm/common/complex/cacoshl.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 cacoshl = __cacoshl
       30 +#pragma weak __cacoshl = cacoshl
  31   31  
  32   32  #include "libm.h"       /* fabsl/isnanl/isinfl/signbitl */
  33   33  #include "complex_wrapper.h"
  34   34  #include "longdouble.h"
  35   35  
  36   36  /* INDENT OFF */
  37   37  /*
  38   38   * ldcomplex cacoshl(ldcomplex z);
  39   39   *      cacosh z = +-i cacos z .
  40   40   * In order to make conj(cacosh(z))=cacosh(conj(z)),

  41   41   * we define
  42   42   *      cacosh z = sign(Im(z))*i cacos z .
  43   43   *
  44   44   */
  45   45  /* INDENT ON */
  46   46  
  47   47  ldcomplex
  48   48  cacoshl(ldcomplex z) {
  49   49          ldcomplex w, ans;
  50   50          long double x, y;
  51   51  
  52   52          w = cacosl(z);
  53   53          x = LD_RE(z);
  54   54          y = LD_IM(z);
  55   55          if (isnanl(y)) {
  56   56                  LD_IM(ans) = y + y;
  57   57                  if (isinfl(x))
  58   58                          LD_RE(ans) = fabsl(x);
  59   59                  else
  60   60                          LD_RE(ans) = y;
  61   61          } else if (signbitl(y) == 0) {
  62   62                  LD_RE(ans) = -LD_IM(w);
  63   63                  LD_IM(ans) = LD_RE(w);
  64   64          } else {
  65   65                  LD_RE(ans) = LD_IM(w);
  66   66                  LD_IM(ans) = -LD_RE(w);
  67   67          }
  68   68          return (ans);
  69   69  }

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