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<title>8.6的解答</title>
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<body background="../images/background.gif">

<center><font class="title2"><b>练习8.6</b></font></center><br>

<p align="left">解：</p>

<p align="left"><span lang="EN-US">&nbsp;&nbsp;&nbsp; （a)</span><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;
mso-hansi-font-family:&quot;Times New Roman&quot;"> 
MOV&nbsp;&nbsp;&nbsp; b&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; R<sub>0</sub><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MUL&nbsp;&nbsp;&nbsp; c 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; R<sub>0</sub><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ADD&nbsp;&nbsp;&nbsp; a 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; R<sub>0</sub><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MOV&nbsp;&nbsp;&nbsp; R<sub>0</sub> 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; x</span></p>

<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp; （b)</span><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;"> 
MOV&nbsp;&nbsp;&nbsp; #0&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; R<sub>0</sub><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SUB&nbsp;&nbsp;&nbsp; b 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; R</span><sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;
mso-hansi-font-family:&quot;Times New Roman&quot;">0</span></sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;"><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MUL&nbsp;&nbsp;&nbsp; a 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; R</span><sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;
mso-hansi-font-family:&quot;Times New Roman&quot;">0</span></sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;"><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MOV&nbsp;&nbsp;&nbsp; d 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; R<sub>1</sub><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ADD&nbsp;&nbsp;&nbsp; e 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; R<sub>1</sub><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MOV&nbsp;&nbsp;&nbsp; c 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; R<sub>2</sub><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SUB&nbsp;&nbsp;&nbsp; R<sub>1</sub> 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; R<sub>2</sub><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ADD&nbsp;&nbsp;&nbsp; R</span><sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;
mso-hansi-font-family:&quot;Times New Roman&quot;">0</span></sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;"> 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; R<sub>2</sub><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MOV&nbsp;&nbsp;&nbsp; R<sub>2</sub> 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; x</span></p>

<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp; （c)</span><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;"> 
MOV&nbsp;&nbsp;&nbsp; a &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; R<sub>0</sub><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; DIV&nbsp;&nbsp;&nbsp; b 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; R</span><sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;
mso-hansi-font-family:&quot;Times New Roman&quot;">0</span></sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;"><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SUB&nbsp;&nbsp;&nbsp; c 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; R</span><sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;
mso-hansi-font-family:&quot;Times New Roman&quot;">0</span></sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;"><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; DIV&nbsp;&nbsp;&nbsp; d 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; R</span><sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;
mso-hansi-font-family:&quot;Times New Roman&quot;">0</span></sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;"><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MOV&nbsp;&nbsp;&nbsp; R</span><sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;
mso-hansi-font-family:&quot;Times New Roman&quot;">0</span></sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;"> 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; x<br>
</span><span lang="EN-US"></span></p>

<p class="MsoNormal"><span lang="EN-US">&nbsp;&nbsp;&nbsp; （d)</span><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;"> 
MOV&nbsp;&nbsp;&nbsp; c&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; R<sub>0</sub><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; DIV&nbsp;&nbsp;&nbsp; d 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; R</span><sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;
mso-hansi-font-family:&quot;Times New Roman&quot;">0</span></sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;"><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MUL&nbsp;&nbsp;&nbsp; e&nbsp;&nbsp;&nbsp; 
&nbsp;&nbsp;&nbsp;&nbsp; R</span><sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;
mso-hansi-font-family:&quot;Times New Roman&quot;">0</span></sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;"><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ADD&nbsp;&nbsp;&nbsp; b&nbsp;&nbsp;&nbsp;&nbsp; 
&nbsp;&nbsp;&nbsp; R</span><sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;
mso-hansi-font-family:&quot;Times New Roman&quot;">0</span></sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;"><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MOV&nbsp;&nbsp;&nbsp; f&nbsp;&nbsp;&nbsp;&nbsp; 
&nbsp;&nbsp;&nbsp; R<sub>1</sub><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MUL&nbsp;&nbsp;&nbsp; g&nbsp;&nbsp;&nbsp;&nbsp; 
&nbsp;&nbsp;&nbsp; R<sub>1</sub><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MOV&nbsp;&nbsp;&nbsp; h&nbsp;&nbsp;&nbsp;&nbsp; 
&nbsp;&nbsp;&nbsp; R<sub>2</sub><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MUL&nbsp;&nbsp;&nbsp; i&nbsp;&nbsp;&nbsp;&nbsp; 
&nbsp;&nbsp;&nbsp; R<sub>2</sub><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SUB&nbsp;&nbsp;&nbsp; R<sub>2</sub>&nbsp;&nbsp;&nbsp; 
&nbsp;&nbsp;&nbsp; R<sub>1</sub><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; DIV&nbsp;&nbsp;&nbsp; R<sub>1</sub>&nbsp;&nbsp;&nbsp; 
&nbsp;&nbsp;&nbsp; R</span><sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;
mso-hansi-font-family:&quot;Times New Roman&quot;">0</span></sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;"><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ADD&nbsp;&nbsp;&nbsp; a&nbsp;&nbsp;&nbsp;&nbsp; 
&nbsp;&nbsp;&nbsp; R</span><sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;
mso-hansi-font-family:&quot;Times New Roman&quot;">0</span></sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;"><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MOV&nbsp;&nbsp;&nbsp; R</span><sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;
mso-hansi-font-family:&quot;Times New Roman&quot;">0</span></sub><span
style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;">
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