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/csinhl.c
          +++ new/usr/src/lib/libm/common/complex/csinhl.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 csinhl = __csinhl
       30 +#pragma weak __csinhl = csinhl
  31   31  
  32   32  #include "libm.h"       /* coshl/expl/fabsl/scalbnl/sincosl/sinhl/__k_cexpl */
  33   33  #include "complex_wrapper.h"
  34   34  
  35   35  /* INDENT OFF */
  36   36  static const long double zero = 0.0L, half = 0.5L;
  37   37  /* INDENT ON */
  38   38  
  39   39  ldcomplex
  40   40  csinhl(ldcomplex z) {

  41   41          long double t, x, y, S, C;
  42   42          int hx, ix, hy, iy, n;
  43   43          ldcomplex ans;
  44   44  
  45   45          x = LD_RE(z);
  46   46          y = LD_IM(z);
  47   47          hx = HI_XWORD(x);
  48   48          ix = hx & 0x7fffffff;
  49   49          hy = HI_XWORD(y);
  50   50          iy = hy & 0x7fffffff;
  51   51          x = fabsl(x);
  52   52          y = fabsl(y);
  53   53  
  54   54          (void) sincosl(y, &S, &C);
  55   55          if (ix >= 0x4004e000) { /* |x| > 60 = prec/2 (14,28,34,60) */
  56   56                  if (ix >= 0x400C62E4) { /* |x| > 11356.52... ~ log(2**16384) */
  57   57                          if (ix >= 0x7fff0000) { /* |x| is inf or NaN */
  58   58                                  if (y == zero) {
  59   59                                          LD_RE(ans) = x;
  60   60                                          LD_IM(ans) = y;
  61   61                                  } else if (iy >= 0x7fff0000) {
  62   62                                          LD_RE(ans) = x;
  63   63                                          LD_IM(ans) = x - y;
  64   64                                  } else {
  65   65                                          LD_RE(ans) = C * x;
  66   66                                          LD_IM(ans) = S * x;
  67   67                                  }
  68   68                          } else {
  69   69                                  /* return exp(x)=t*2**n */
  70   70                                  t = __k_cexpl(x, &n);
  71   71                                  LD_RE(ans) = scalbnl(C * t, n - 1);
  72   72                                  LD_IM(ans) = scalbnl(S * t, n - 1);
  73   73                          }
  74   74                  } else {
  75   75                          t = expl(x) * half;
  76   76                          LD_RE(ans) = C * t;
  77   77                          LD_IM(ans) = S * t;
  78   78                  }
  79   79          } else {
  80   80                  if (x == zero) {        /* x = 0, return (0,S) */
  81   81                          LD_RE(ans) = zero;
  82   82                          LD_IM(ans) = S;
  83   83                  } else {
  84   84                          LD_RE(ans) = C * sinhl(x);
  85   85                          LD_IM(ans) = S * coshl(x);
  86   86                  }
  87   87          }
  88   88          if (hx < 0)
  89   89                  LD_RE(ans) = -LD_RE(ans);
  90   90          if (hy < 0)
  91   91                  LD_IM(ans) = -LD_IM(ans);
  92   92          return (ans);
  93   93  }

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