5261 libm should stop using synonyms.h

          --- old/usr/src/lib/libm/common/m9x/trunc.c
          +++ new/usr/src/lib/libm/common/m9x/trunc.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 trunc = __trunc
       30 +#pragma weak __trunc = trunc
  31   31  
  32   32  #include "libm.h"
  33   33  
  34   34  double
  35   35  trunc(double x) {
  36   36          union {
  37   37                  unsigned i[2];
  38   38                  double d;
  39   39          } xx;
  40   40          unsigned hx, sx, i;

  41   41  
  42   42          xx.d = x;
  43   43          hx = xx.i[HIWORD] & ~0x80000000;
  44   44          sx = xx.i[HIWORD] & 0x80000000;
  45   45          if (hx < 0x43300000) {  /* |x| < 2^52 */
  46   46                  if (hx < 0x3ff00000)    /* |x| < 1 */
  47   47                          return (sx ? -0.0 : 0.0);
  48   48  
  49   49                  /* chop x at the integer bit */
  50   50                  if (hx < 0x41300000) {
  51   51                          i = 1 << (0x412 - (hx >> 20));
  52   52                          xx.i[HIWORD] &= ~(i | (i - 1));
  53   53                          xx.i[LOWORD] = 0;
  54   54                  } else {
  55   55                          i = 1 << (0x432 - (hx >> 20));
  56   56                          xx.i[LOWORD] &= ~(i | (i - 1));
  57   57                  }
  58   58                  return (xx.d);
  59   59          } else if (hx < 0x7ff00000)
  60   60                  return (x);
  61   61          else
  62   62  #if defined(FPADD_TRAPS_INCOMPLETE_ON_NAN)
  63   63                  return (hx >= 0x7ff80000 ? x : x + x);
  64   64                  /* assumes sparc-like QNaN */
  65   65  #else
  66   66                  return (x + x);
  67   67  #endif
  68   68  }

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