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/cexpf.c
          +++ new/usr/src/lib/libm/common/complex/cexpf.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   * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  23   23   */
  24   24  /*
  25   25   * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  26   26   * Use is subject to license terms.
  27   27   */
  28   28  
  29      -#pragma weak cexpf = __cexpf
       29 +#pragma weak __cexpf = cexpf
  30   30  
  31   31  #include "libm.h"
  32   32  #include "complex_wrapper.h"
  33   33  
  34   34  #if defined(__i386) && !defined(__amd64)
  35   35  extern int __swapRP(int);
  36   36  #endif
  37   37  
  38   38  static const float zero = 0.0F;
  39   39  

  40   40  fcomplex
  41   41  cexpf(fcomplex z) {
  42   42          fcomplex        ans;
  43   43          float           x, y, c, s;
  44   44          double          t;
  45   45          int             n, ix, iy, hx, hy;
  46   46  
  47   47          x = F_RE(z);
  48   48          y = F_IM(z);
  49   49          hx = THE_WORD(x);
  50   50          hy = THE_WORD(y);
  51   51          ix = hx & 0x7fffffff;
  52   52          iy = hy & 0x7fffffff;
  53   53          if (iy == 0) {          /* y = 0 */
  54   54                  F_RE(ans) = expf(x);
  55   55                  F_IM(ans) = y;
  56   56          } else if (ix == 0x7f800000) {  /* x is +-inf */
  57   57                  if (hx < 0) {
  58   58                          if (iy >= 0x7f800000) {
  59   59                                  F_RE(ans) = zero;
  60   60                                  F_IM(ans) = zero;
  61   61                          } else {
  62   62                                  sincosf(y, &s, &c);
  63   63                                  F_RE(ans) = zero * c;
  64   64                                  F_IM(ans) = zero * s;
  65   65                          }
  66   66                  } else {
  67   67                          if (iy >= 0x7f800000) {
  68   68                                  F_RE(ans) = x;
  69   69                                  F_IM(ans) = y - y;
  70   70                          } else {
  71   71                                  sincosf(y, &s, &c);
  72   72                                  F_RE(ans) = x * c;
  73   73                                  F_IM(ans) = x * s;
  74   74                          }
  75   75                  }
  76   76          } else {
  77   77                  sincosf(y, &s, &c);
  78   78                  if (ix >= 0x42B171AA) { /* |x| > 88.722... ~ log(2**128) */
  79   79  #if defined(__i386) && !defined(__amd64)
  80   80                          int     rp = __swapRP(fp_extended);
  81   81  #endif
  82   82                          t = __k_cexp(x, &n);
  83   83                          F_RE(ans) = (float)scalbn(t * (double)c, n);
  84   84                          F_IM(ans) = (float)scalbn(t * (double)s, n);
  85   85  #if defined(__i386) && !defined(__amd64)
  86   86                          if (rp != fp_extended)
  87   87                                  (void) __swapRP(rp);
  88   88  #endif
  89   89                  } else {
  90   90                          t = expf(x);
  91   91                          F_RE(ans) = t * c;
  92   92                          F_IM(ans) = t * s;
  93   93                  }
  94   94          }
  95   95          return (ans);
  96   96  }

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