急救：：：如何编写一个编译器？！~~

jinli218 2011-04-04 01:15:39

哪位牛人知道L1吗？我需要编一个L1 -> x86 的编译器，什么语言编的都行，希望大家能给点提示，给我讲讲编译器是怎么回事都行~！~ 我是一大菜鸟！~~~

下面是L1的一个代码，结果得89：

(((esi <- 89) ;; size of the array to create
(eax <- (allocate esi 3))
(edi <- eax) ;; save this register for the array base pointer
(ebx <- edi) ;; - loop index variable is now a pointer into
(ebx += 12) ;; the array; it starts at the 2nd word.

(esi *= 2) ;; - convert esi so it is the location of
(esi += 2) ;; the word just past the end of
(esi += edi) ;; the array

:loop
(cjump ebx < esi :keep_going :done)
:keep_going

(edx <- (mem ebx -8))
(ecx <- (mem ebx -4))
(edx += ecx)
(edx -= 1)
((mem ebx 0) <- edx)

(ebx += 4)

;; go back to the loop test
(goto :loop)

:done
(eax <- (print edi))))

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