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/cexpl.c
          +++ new/usr/src/lib/libm/common/complex/cexpl.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 cexpl = __cexpl
       30 +#pragma weak __cexpl = cexpl
  31   31  
  32   32  #include "libm.h"               /* expl/isinfl/iszerol/scalbnl/sincosl */
  33   33  #include "complex_wrapper.h"
  34   34  
  35   35  extern int isinfl(long double);
  36   36  extern int iszerol(long double);
  37   37  
  38   38  /* INDENT OFF */
  39   39  static const long double zero = 0.0L;
  40   40  /* INDENT ON */

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

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