5261 libm should stop using synonyms.h

          --- old/usr/src/lib/libm/amd64/src/exp2l.s
          +++ new/usr/src/lib/libm/amd64/src/exp2l.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 2005 Sun Microsystems, Inc.  All rights reserved.
  26   26   * Use is subject to license terms.
  27   27   */
  28   28  
  29   29          .file "exp2l.s"
  30   30  
  31   31  #include "libm.h"
  32   32  LIBM_ANSI_PRAGMA_WEAK(exp2l,function)
  33      -#include "libm_synonyms.h"
  34   33  
  35   34          ENTRY(exp2l)
  36   35          movl    16(%rsp),%ecx           / cx <--sign&bexp(x)
  37   36          andl    $0x7fff,%ecx            / ecx <-- zero_xtnd(bexp(x))
  38   37          cmpl    $0x3fff,%ecx            / Is |x| <= 1?
  39   38          jb      .shortcut               / If so, take a shortcut.
  40   39          je      .check_tail             / |x| may be slightly > 1
  41   40  .general_case:                          / Here, |x| > 1 or x is NaN
  42   41          cmpl    $0x7fff,%ecx            / bexp(|x|) = bexp(INF)?
  43   42          je      .not_finite             / if so, x is not finite

  44   43  .finite_non_special:                    / Here, 1 < |x| < INF
  45   44          fldt    8(%rsp)                 / push arg
  46   45          fld     %st(0)                  / duplicate stack top
  47   46          frndint                         / [x],x
  48   47          fucomi  %st(1),%st              / x integral?
  49   48          je      .x_integral             / branch if x integral
  50   49          fxch                            / x, [x]
  51   50          fsub    %st(1),%st              / x-[x], [x]
  52   51          f2xm1                           / 2**(x-[x])-1, [x]
  53   52          fld1                            / 1,2**(x-[x])-1, [x]
  54   53          faddp   %st,%st(1)              / 2**(x-[x]), [x]
  55   54          fscale                          / 2**x = 2**(arg), [x]
  56   55          fstp    %st(1)
  57   56          ret
  58   57  
  59   58  .x_integral:
  60   59          fstp    %st(0)                  / ,x
  61   60          fld1                            / 1 = 2**0, x
  62   61          fscale                          / 2**(0 + x) = 2**x, x
  63   62          fstp    %st(1)                  / 2**x
  64   63          ret
  65   64  
  66   65  .check_tail:
  67   66          movl    12(%rsp),%ecx           / ecx <-- hi_32(sgnfcnd(x))
  68   67          cmpl    $0x80000000,%ecx        / Is |x| <= 1?
  69   68          ja      .finite_non_special
  70   69          movl    8(%rsp),%edx            / edx <-- lo_32(sgnfcnd(x))
  71   70          cmpl    $0x0,%edx               / Is |x| slightly > 1?
  72   71          ja      .finite_non_special     / branch if |x| slightly > 1
  73   72  .shortcut:
  74   73          / Here, |x| < 1,
  75   74          / whence x is in f2xm1's domain.
  76   75          fldt    8(%rsp)                 / push x
  77   76          f2xm1                           / 2**x - 1
  78   77          fld1                            / 1,2**x - 1
  79   78          faddp   %st,%st(1)              / 2**x
  80   79          ret
  81   80  
  82   81  .not_finite:
  83   82          movl    12(%rsp),%ecx           / ecx <-- hi_32(sgnfcnd(x))
  84   83          cmpl    $0x80000000,%ecx        / hi_32(|x|) = hi_32(INF)?
  85   84          jne     .NaN_or_pinf            / if not, x is NaN 
  86   85          movl    8(%rsp),%edx            / edx <-- lo_32(x)
  87   86          cmpl    $0,%edx                 / lo_32(x) = 0?
  88   87          jne     .NaN_or_pinf            / if not, x is NaN
  89   88          movl    16(%rsp),%eax           / ax <-- sign&bexp((x))
  90   89          andl    $0x8000,%eax            / here, x is infinite, but +/-?
  91   90          jz      .NaN_or_pinf            / branch if x = +INF
  92   91          fldz                            / Here, x = -inf, so return 0
  93   92          ret
  94   93  
  95   94  .NaN_or_pinf:
  96   95          / Here, x = NaN or +inf, so load x and return immediately.
  97   96          fldt    8(%rsp)
  98   97          ret
  99   98          .align  16
 100   99          SET_SIZE(exp2l)

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