041.64bit除法运算

32位除法示例

最新推荐文章于 2024-03-10 23:20:11 发布

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本示例展示了如何使用32位除法指令处理64位整数被除数，通过将被除数分为高32位和低32位，然后与32位除数进行除法运算，得到32位的商和余数。

Title 32-bit Division Example             (Divide32.asm)

; This program divides a 64-bit integer dividend
; by a 32-bit divisor. The quotient and remainder
; are each 32 bits.

INCLUDE Irvine32.inc

.data
dividend  QWORD   0000000800300020h
divisor   DWORD   00000100h

.code
main PROC

   mov  edx,dword ptr dividend + 4     ; dividend, high  00000008
   mov  eax,dword ptr dividend         ; dividend, low   00300020
   div  divisor

; quotient(EAX) = 08003000h, remainder(EDX) = 00000020h

   exit
main ENDP
END main