这个代码用于反转字符串
.386
.model flat,stdcall
.stack 4096
ExitProcess proto,dwExitCode:dword
.data
source BYTE "This is the source string",0
target BYTE SIZEOF source DUP('#')
.code
main PROC
; Point ESI to the last character in the source string:
mov esi,OFFSET target - 2
; Point EDI to the beginning of the target string:
; We do not copy the null terminator byte.
mov edi,OFFSET target
mov ecx,SIZEOF source-1 ; loop counter
L1: mov al,[esi] ; get a character from source
mov [edi],al ; …