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📁 加密与解密,软件加密保护技术与解决方案,看雪文档!
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<p><a href="../catalog.htm">目录</a>＞＞第2章</p>
<p align="center" class="shadow1Copy"><b class="p3">第2章 基础知识</b><span class="p9">　</span></p>
<table width="80%" border="0" cellspacing="0" cellpadding="3" align="center" bgcolor="#bcbcbc" bordercolor="#111111" class="shadow1">
  <tr> 
    <td class="shadow1"> 
      <div align="center"><span class="p9">第一节 <a href="Chap2-1.htm"><font color="#FFFFFF">软件保护</font></a><font color="#FFFFFF"></font></span></div>
    </td>
    <td class="shadow1"> 
      <div align="center"><span class="p9">第二节 <a href="Chap2-2.htm"><font color="#FFFFFF">汇编语言</font></a></span></div>
    </td>
    <td class="shadow1"> 
      <div align="center"><span class="p9">第三节 <a href="Chap2-3.htm"><font color="#FFFFFF">汇编跳转</font></a></span></div>
    </td>
    <td class="shadow1"> 
      <div align="center"><span class="p9">第四节 <a href="Chap2-4.htm"><font color="#FFFFFF">浮点指令</font></a></span></div>
    </td>
    <td class="shadow1"> 
      <div align="center"><span class="p9">第五节 <a href="Chap2-5.htm"><font color="#FFFFFF">分析技术</font></a></span></div>
    </td>
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</table>
<blockquote> 
  <p align="center"><b>第四节 浮点指令</b></p>
</blockquote>
<p>　　对下面的指令先做一些说明： <br>
  st(i)：代表浮点寄存器，所说的出栈、入栈操作都是对st(i)的影响 <br>
  src,dst,dest,op等都是指指令的操作数，src表示源操作数，dst/dest表示目的操作数 <br>
  mem8,mem16,mem32,mem64,mem80等表示是内存操作数，后面的数值表示该操作数的内存位数（8位为一字节） <br>
  x &lt;- y 表示将y的值放入x，例st(0) &lt;- st(0) - st(1)表示将st(0)-st(1)的值放入浮点寄存器st(0) </p>
<p> 
  <![if !supportLists]>
  <span lang=EN-US>1．<span
style='font:7.0pt "Times New Roman"'>&nbsp; </span></span> 
  <![endif]>
  <span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>数据传递和对常量的操作指令</span></p>
<blockquote> 
  <table border=1 cellspacing=0 cellpadding=0 style='border-collapse:collapse;
 border:none;mso-border-top-alt:solid windowtext .5pt;mso-border-bottom-alt:
 solid windowtext .5pt;mso-padding-alt:0cm 5.4pt 0cm 5.4pt'>
    <tr> 
      <td width=119 valign=top style='width:89.4pt;border:solid windowtext .5pt;
  border-left:none;background:#E5E5E5;mso-shading:white;mso-pattern:gray-10 auto;
  padding:0cm 5.4pt 0cm 5.4pt'> 
        <p class=MsoNormal align=center style='text-align:center'><span
  style='font-size:9.0pt;mso-bidi-font-size:10.0pt;font-family:宋体;mso-ascii-font-family:
  "Times New Roman";mso-hansi-font-family:"Times New Roman"'>指令格式</span><span
  lang=EN-US style='font-size:9.0pt;mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
      </td>
      <td width=168 valign=top style='width:126.0pt;border:solid windowtext .5pt;
  border-left:none;mso-border-left-alt:solid windowtext .5pt;background:#E5E5E5;
  mso-shading:white;mso-pattern:gray-10 auto;padding:0cm 5.4pt 0cm 5.4pt'> 
        <p class=MsoNormal align=center style='text-align:center'><span
  style='font-size:9.0pt;mso-bidi-font-size:10.0pt;font-family:宋体;mso-ascii-font-family:
  "Times New Roman";mso-hansi-font-family:"Times New Roman"'>指令含义</span><span
  lang=EN-US style='font-size:9.0pt;mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
      </td>
      <td width=283 valign=top style='width:211.95pt;border-top:solid windowtext .5pt;
  border-left:none;border-bottom:solid windowtext .5pt;border-right:none;
  mso-border-left-alt:solid windowtext .5pt;background:#E5E5E5;mso-shading:
  white;mso-pattern:gray-10 auto;padding:0cm 5.4pt 0cm 5.4pt'> 
        <p class=MsoNormal align=center style='text-align:center'><span
  style='font-size:9.0pt;mso-bidi-font-size:10.0pt;font-family:宋体;mso-ascii-font-family:
  "Times New Roman";mso-hansi-font-family:"Times New Roman"'>执行的操作</span><span
  lang=EN-US style='font-size:9.0pt;mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
      </td>
    </tr>
    <tr> 
      <td width=119 valign=top style='width:89.4pt;border-top:none;border-left:
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
  mso-border-top-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'> 
        <p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;mso-bidi-font-size:
  10.0pt'>FLD src<o:p></o:p></span></p>
      </td>
      <td width=168 valign=top style='width:126.0pt;border-top:none;border-left:
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'> 
        <p class=MsoNormal><span style='font-size:9.0pt;mso-bidi-font-size:10.0pt;
  font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
  "Times New Roman"'>装入实数到</span><span lang=EN-US style='font-size:9.0pt;
  mso-bidi-font-size:10.0pt'>st(0)<o:p></o:p></span></p>
      </td>
      <td width=283 valign=top style='width:211.95pt;border:none;border-bottom:
  solid windowtext .5pt;mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'> 
        <p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;mso-bidi-font-size:
  10.0pt'>st(0) </span><span lang=EN-US>&lt;- </span><span lang=EN-US
  style='font-size:9.0pt;mso-bidi-font-size:10.0pt'>src (mem32/mem64/mem80) <o:p></o:p></span></p>
      </td>
    </tr>
    <tr> 
      <td width=119 valign=top style='width:89.4pt;border-top:none;border-left:
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
  mso-border-top-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'> 
        <p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;mso-bidi-font-size:
  10.0pt'>FILD src<o:p></o:p></span></p>
      </td>
      <td width=168 valign=top style='width:126.0pt;border-top:none;border-left:
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'> 
        <p class=MsoNormal><span style='font-size:9.0pt;mso-bidi-font-size:10.0pt;
  font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
  "Times New Roman"'>装入整数到</span><span lang=EN-US style='font-size:9.0pt;
  mso-bidi-font-size:10.0pt'>st(0) <o:p></o:p></span></p>
      </td>
      <td width=283 valign=top style='width:211.95pt;border:none;border-bottom:
  solid windowtext .5pt;mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'> 
        <p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;mso-bidi-font-size:
  10.0pt'>st(0)</span><span lang=EN-US> &lt;- </span><span lang=EN-US
  style='font-size:9.0pt;mso-bidi-font-size:10.0pt'>src (mem16/mem32/mem64)<o:p></o:p></span></p>
      </td>
    </tr>
    <tr> 
      <td width=119 valign=top style='width:89.4pt;border-top:none;border-left:
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
  mso-border-top-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'> 
        <p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;mso-bidi-font-size:
  10.0pt'>FBLD src<span style="mso-spacerun: yes">&nbsp; </span><o:p></o:p></span></p>
      </td>
      <td width=168 valign=top style='width:126.0pt;border-top:none;border-left:
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'> 
        <p class=MsoNormal><span style='font-size:9.0pt;mso-bidi-font-size:10.0pt;
  font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
  "Times New Roman"'>装入</span><span lang=EN-US style='font-size:9.0pt;
  mso-bidi-font-size:10.0pt'>BCD</span><span style='font-size:9.0pt;mso-bidi-font-size:
  10.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
  "Times New Roman"'>数到</span><span lang=EN-US style='font-size:9.0pt;
  mso-bidi-font-size:10.0pt'>st(0)<o:p></o:p></span></p>
      </td>
      <td width=283 valign=top style='width:211.95pt;border:none;border-bottom:
  solid windowtext .5pt;mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'> 
        <p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;mso-bidi-font-size:
  10.0pt'>st(0) </span><span lang=EN-US>&lt;-</span><span lang=EN-US
  style='font-size:9.0pt;mso-bidi-font-size:10.0pt'> src (mem80)<o:p></o:p></span></p>
      </td>
    </tr>
    <tr> 
      <td width=570 colspan=3 valign=top style='width:427.35pt;border:none;
  border-bottom:solid windowtext .5pt;mso-border-top-alt:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'> 
        <p class=MsoNormal> 
          <![if !supportEmptyParas]>
          &nbsp; 
          <![endif]>
          <span
  lang=EN-US style='font-size:9.0pt;mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
      </td>
    </tr>
    <tr> 
      <td width=119 valign=top style='width:89.4pt;border-top:none;border-left:
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
  mso-border-top-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'> 
        <p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;mso-bidi-font-size:
  10.0pt'>FLDZ<o:p></o:p></span></p>
      </td>
      <td width=168 valign=top style='width:126.0pt;border-top:none;border-left:
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'> 
        <p class=MsoNormal><span style='font-size:9.0pt;mso-bidi-font-size:10.0pt;
  font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
  "Times New Roman"'>将</span><span lang=EN-US style='font-size:9.0pt;
  mso-bidi-font-size:10.0pt'>0.0</span><span style='font-size:9.0pt;mso-bidi-font-size:
  10.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
  "Times New Roman"'>装入</span><span lang=EN-US style='font-size:9.0pt;
  mso-bidi-font-size:10.0pt'>st(0)<o:p></o:p></span></p>
      </td>
      <td width=283 valign=top style='width:211.95pt;border:none;border-bottom:
  solid windowtext .5pt;mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'> 
        <p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;mso-bidi-font-size:
  10.0pt'>st(0) </span><span lang=EN-US>&lt;-</span><span lang=EN-US
  style='font-size:9.0pt;mso-bidi-font-size:10.0pt'> 0.0 <o:p></o:p></span></p>
      </td>
    </tr>
    <tr> 
      <td width=119 valign=top style='width:89.4pt;border-top:none;border-left:
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
  mso-border-top-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'> 
        <p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;mso-bidi-font-size:
  10.0pt'>FLD1<o:p></o:p></span></p>
      </td>
      <td width=168 valign=top style='width:126.0pt;border-top:none;border-left:
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'> 
        <p class=MsoNormal><span style='font-size:9.0pt;mso-bidi-font-size:10.0pt;
  font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
  "Times New Roman"'>将</span><span lang=EN-US style='font-size:9.0pt;
  mso-bidi-font-size:10.0pt'>1.0</span><span style='font-size:9.0pt;mso-bidi-font-size:
  10.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
  "Times New Roman"'>装入</span><span lang=EN-US style='font-size:9.0pt;
  mso-bidi-font-size:10.0pt'>st(0)<o:p></o:p></span></p>
      </td>
      <td width=283 valign=top style='width:211.95pt;border:none;border-bottom:
  solid windowtext .5pt;mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'> 
        <p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;mso-bidi-font-size:
  10.0pt'>st(0) </span><span lang=EN-US>&lt;-</span><span lang=EN-US
  style='font-size:9.0pt;mso-bidi-font-size:10.0pt'> 1.0 <o:p></o:p></span></p>
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