Home Database Mysql Tutorial Red编译器阅读笔记(2)

Red编译器阅读笔记(2)

Jun 07, 2016 pm 03:18 PM
red generate programming notes translater language read advanced

高级程序设计语言生成的中间代码一般有两种:基于栈的和基于寄存器的。 一般来说,基于寄存器的实现方式比较高效,因为我们现实中的机器基本上都是使用基于寄存器的指令集,所以从高级语言映射到机器码会相对容易和高效。但是采用基于寄存器的方式,完成同一

高级程序设计语言生成的中间代码一般有两种:基于栈的和基于寄存器的。

一般来说,基于寄存器的实现方式比较高效,因为我们现实中的机器基本上都是使用基于寄存器的指令集,所以从高级语言映射到机器码会相对容易和高效。但是采用基于寄存器的方式,完成同一个命令,需要使用较多的指令,实现上会比较复杂。

基于栈的方式,也就是构建一台虚拟的栈机器,需要的指令集很少,实现也简单。所以很多编程语言最初会选用这种方式来实现。特别是动态语言,毕竟效率不是他们的首要追求。

Red也是使用了基于栈的方式来实现运行时的。下面的PPT展示了各个操作的执行过程。

PPT: Red Call Stack (可能需翻墙,这应该难不倒作为程序员的聪明的你吧!Red编译器阅读笔记(2)

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