几个c++语句的汇编实现(H1指令)

最新推荐文章于 2025-06-25 22:43:08 发布

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#汇编 #c++

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本文通过具体的汇编指令展示了如何进行内存地址的加载、存储及运算等基本操作，并演示了间接寻址的方式。

;*p = 5
  ldc 5   ;
  push
  ld p ;load p's value
  sti  ;save 5 to mem[p's value]
  ldi  ;get the value
  dout
  ldc '/n'
  aout
;*** q = 10
  ldc 10
  push
  ld q  ;ac = 17 *q's addr
  ldi   ;ac = 18 **q's addr
  ldi   ;ac = 19 ***q's addr
  sti   ;save 10 to ***q,this address is result
;x = ***q
  ldi   ;ld result,***q's value
  st x  ;x = ***q;
  ld x  ;
  dout
  ldc '/n'
  aout
;*(p+1) = 6
  ldc 6
  push
  ld p + 1 ;load (p+1)'s value,should be 81
  sti   ; save 6 to *(p+1)
  ldi   ;*(p+1).value,get the value
  dout  ;check the value if 6
  ldc '/n'
  aout
;*p = *p +1

  ld p  ;80
  ldi   ;addr 80 value: should be 5
  add @1
  push
  ld p
  sti   ;save *p+1 to *p
  ld p
  ldi   ;addr 80 value: should be 6
  dout
  ldc '/n'
  aout
;r = p
  ld p ;ac = p's addr
  st r
  ld r
  dout
  halt
p:  dw 80
  dw 81
q:  dw * + 1; *q is next address.(* + 1)
  dw * + 1; **q is next address.(* + 1)
  dw * + 1; ***q is next address.(* + 1 = result)
result: dw 0
x:  dw 0
r:  dw 0
@1:  dw 1