📄 第七章 keil c51的代码效率.htm
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<P class=MsoBodyTextFirstIndent>再如<SPAN lang=EN-US>if(
),while( )，等语句也是代码相对较低的语句，但编译以后比switch-case要高得多。</SPAN></P>
<P class=MsoBodyTextFirstIndent>因此建议设计者尽量少用<SPAN
lang=EN-US>switch-case之类语句来控制程序结构，以提高代码率。</SPAN></P>
<P class=MsoBodyTextFirstIndent>除以上两点外，其它因素也会对代码率产生影响，例如：</P>
<P class=MsoBodyTextIndent
style="MARGIN-LEFT: 36.75pt">是否用寄存器传递参数<SPAN lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>即NOAREGS选项是否有</SPAN></P>
<P class=MsoBodyTextIndent
style="MARGIN-LEFT: 36.75pt">是否包括调试信息：即<SPAN
lang=EN-US>DEBUG选项</SPAN></P>
<P class=MsoBodyTextIndent
style="MARGIN-LEFT: 36.75pt">是否包括扩展的调试信息：即<SPAN
lang=EN-US>BJECTEXTEND</SPAN></P></TD></TR>
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