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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>

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          --- old/usr/src/lib/libm/i386/src/exp2f.s
          +++ new/usr/src/lib/libm/i386/src/exp2f.s
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  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 "exp2f.s"
  30   30  
  31   31  #include "libm.h"
  32   32  LIBM_ANSI_PRAGMA_WEAK(exp2f,function)
  33      -#include "libm_synonyms.h"
  34   33  
  35   34          ENTRY(exp2f)
  36   35          movl    4(%esp),%ecx            / ecx <-- x
  37   36          andl    $0x7fffffff,%ecx        / ecx <-- |x|
  38   37          cmpl    $0x3f800000,%ecx        / Is |x| <= 1?
  39   38          jbe     .shortcut               / If so, take a shortcut.
  40   39          cmpl    $0x7f800000,%ecx        / |x| >= INF?
  41   40          jae     .not_finite             / if so, x is not finite
  42   41          flds    4(%esp)                 / push arg
  43   42          fld     %st(0)                  / duplicate stack top
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