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>
5262 libm needs to be carefully unifdef'd
5268 libm doesn't need to hide symbols which are already local
Reviewed by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
Reviewed by: Igor Kozhukhov <ikozhukhov@gmail.com>
Reviewed by: Gordon Ross <gwr@nexenta.com>
Approved by: Gordon Ross <gwr@nexenta.com>

          --- old/usr/src/lib/libm/common/m9x/llroundf.c
          +++ new/usr/src/lib/libm/common/m9x/llroundf.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      -#if defined(ELFOBJ)
  31      -#pragma weak llroundf = __llroundf
       30 +#pragma weak __llroundf = llroundf
  32   31  #if defined(__sparcv9) || defined(__amd64)
  33      -#pragma weak lroundf = __llroundf
  34      -#pragma weak __lroundf = __llroundf
  35      -#endif
       32 +#pragma weak lroundf = llroundf
       33 +#pragma weak __lroundf = llroundf
  36   34  #endif
  37   35  
  38   36  #include "libm.h"
  39   37  
  40   38  long long
  41   39  llroundf(float x) {
  42   40          union {
  43   41                  unsigned i;
  44   42                  float f;
  45   43          } xx;

  46   44          unsigned hx, sx, i;
  47   45  
  48   46          xx.f = x;
  49   47          hx = xx.i & ~0x80000000;
  50   48          sx = xx.i & 0x80000000;
  51   49  
  52   50          if (hx < 0x4b000000) { /* |x| < 2^23 */
  53   51                  /* handle |x| < 1 */
  54   52                  if (hx < 0x3f800000) {
  55   53                          if (hx >= 0x3f000000)
  56   54                                  return (sx ? -1LL : 1LL);
  57   55                          return (0LL);
  58   56                  }
  59   57  
  60   58                  /* round x at the integer bit */
  61   59                  i = 1 << (0x95 - (hx >> 23));
  62   60                  xx.i = (xx.i + i) & ~((i << 1) - 1);
  63   61  
  64   62                  /*
  65   63                   * on LP32 architectures, we can just convert x to a 32-bit
  66   64                   * integer and sign-extend it
  67   65                   */
  68   66                  return ((long) xx.f);
  69   67          }
  70   68  
  71   69          /* now x is nan, inf, or integral */
  72   70          return ((long long) x);
  73   71  }

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