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/i386/src/isnanl.s
          +++ new/usr/src/lib/libm/i386/src/isnanl.s

   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 2006 Sun Microsystems, Inc.  All rights reserved.
  26   26   * Use is subject to license terms.
  27   27   */
  28   28  
  29   29          .file "isnanl.s"
  30   30  
  31   31  #include "libm.h"
  32   32  LIBM_ANSI_PRAGMA_WEAK(isnanl,function)
  33      -#include "libm_synonyms.h"
  34   33  
  35   34          ENTRY(isnanl)
  36   35          movl    12(%esp),%eax           / ax <-- sign bit and exp
  37   36          andl    $0x00007fff,%eax
  38   37          jz      .not_nan                / jump if exp is all 0
  39   38          xorl    $0x00007fff,%eax
  40   39          jz      .nan_or_inf             / jump if exp is all 1
  41   40          testl   $0x80000000,8(%esp)
  42   41          jz      .got_nan                / jump if leading bit is 0
  43   42          movl    $0,%eax

  44   43  .not_nan:
  45   44          ret
  46   45  .nan_or_inf:                            / note that %eax = 0 from before
  47   46          cmpl    $0x80000000,8(%esp)     / what is first half of significand?
  48   47          jnz     .got_nan                / jump if not equal to 0x80000000
  49   48          testl   $0xffffffff,4(%esp)     / is second half of significand 0?
  50   49          jnz     .got_nan                / jump if not equal to 0
  51   50          ret
  52   51  .got_nan:
  53   52          movl    $1,%eax
  54   53          ret
  55   54          .align  4
  56   55          SET_SIZE(isnanl)

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