5261 libm should stop using synonyms.h

          --- old/usr/src/lib/libm/common/m9x/lround.c
          +++ new/usr/src/lib/libm/common/m9x/lround.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 lround = __lround
       30 +#pragma weak __lround = lround
  31   31  
  32   32  /*
  33   33   * lround(x) rounds its argument to the nearest integer, rounding ties
  34   34   * away from zero, and converts the result to a 32 bit signed integer.
  35   35   *
  36   36   * If x is NaN, infinite, or so large that the nearest integer
  37   37   * would exceed 32 bits, the invalid operation exception is raised.
  38   38   */
  39   39  
  40   40  #include <sys/isa_defs.h>       /* _ILP32 */

  41   41  #include "libm.h"
  42   42  
  43   43  #if defined(_ILP32)
  44   44  long
  45   45  lround(double x) {
  46   46          union {
  47   47                  unsigned i[2];
  48   48                  double d;
  49   49          } xx;
  50   50          unsigned hx, sx, i;
  51   51  
  52   52          xx.d = x;
  53   53          hx = xx.i[HIWORD] & ~0x80000000;
  54   54          sx = xx.i[HIWORD] & 0x80000000;
  55   55          if (hx < 0x43300000) {  /* |x| < 2^52 */
  56   56                  if (hx < 0x3ff00000) {  /* |x| < 1 */
  57   57                          if (hx >= 0x3fe00000)
  58   58                                  return (sx ? -1L : 1L);
  59   59                          return (0L);
  60   60                  }
  61   61  
  62   62                  /* round x at the integer bit */
  63   63                  if (hx < 0x41300000) {
  64   64                          i = 1 << (0x412 - (hx >> 20));
  65   65                          xx.i[HIWORD] = (xx.i[HIWORD] + i) & ~(i | (i - 1));
  66   66                          xx.i[LOWORD] = 0;
  67   67                  } else {
  68   68                          i = 1 << (0x432 - (hx >> 20));
  69   69                          xx.i[LOWORD] += i;
  70   70                          if (xx.i[LOWORD] < i)
  71   71                                  xx.i[HIWORD]++;
  72   72                          xx.i[LOWORD] &= ~(i | (i - 1));
  73   73                  }
  74   74          }
  75   75  
  76   76          /* now x is nan, inf, or integral */
  77   77          return ((long) xx.d);
  78   78  }
  79   79  #else
  80   80  #error Unsupported architecture
  81   81  #endif  /* defined(_ILP32) */

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