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/lrintf.c
          +++ new/usr/src/lib/libm/common/m9x/lrintf.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 lrintf = __lrintf
  32      -#endif
       30 +#pragma weak __lrintf = lrintf
  33   31  
  34   32  #include <sys/isa_defs.h>       /* _ILP32 */
  35   33  #include "libm.h"
  36   34  
  37   35  #if defined(_ILP32)
  38   36  long
  39   37  lrintf(float x) {
  40   38          /*
  41   39           * Note: The following code works on x86 (in the default rounding
  42   40           * precision mode), but one should just use the fistpl instruction

  43   41           * instead.
  44   42           */
  45   43          union {
  46   44                  unsigned i;
  47   45                  float f;
  48   46          } xx, yy;
  49   47          unsigned hx;
  50   48  
  51   49          xx.f = x;
  52   50          hx = xx.i & ~0x80000000;
  53   51          if (hx < 0x4b000000) {  /* |x| < 2^23 */
  54   52                  /* add and subtract a power of two to round x to an integer */
  55   53  #if defined(__sparc)
  56   54                  yy.i = (xx.i & 0x80000000) | 0x4b000000;
  57   55  #elif defined(__x86)
  58   56                  /* assume 64-bit precision */
  59   57                  yy.i = (xx.i & 0x80000000) | 0x5f000000;
  60   58  #else
  61   59  #error Unknown architecture
  62   60  #endif
  63   61                  x = (x + yy.f) - yy.f;
  64   62                  return ((long) x);
  65   63          }
  66   64  
  67   65          /* now x is nan, inf, or integral */
  68   66          return ((long) x);
  69   67  }
  70   68  #else
  71   69  #error Unsupported architecture
  72   70  #endif  /* defined(_ILP32) */

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