Assembly �[�o��I -- ¹q¸£ºô¸ô°Q½×ªO

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Date Posted: 23:05:14 12/04/01 Tue
Author: Richard In Texas
Subject: Assembly �[�o��I

(Use Stack to pass the parameters)
�g�@�ӰƵ{��Calc_Num�h�p��
Number = (Var_A * Var_A) - (Var_B * 2) + Var_C - 16

push Var_A
push Var_B
push Var_C
push offset number
call Calc_Num

Answer:
;��]�]�Ҧ��p�⤣�W�Lone word�A�_�h�N��״N��D�F
Calc_num proc
push bp
mov bp, sp
push ax
push bx

mov ax, 8[bp] ;AX = Var_B
mov bx, 2
mul bx ;AX * 2 = DX:AX
mov 8[bp], ax ;2 * Var_B

mov ax, 10[bp] ;AX = Var_A
mov bx, 10[bp] ;BX = Var_A
mul bx ;DX:AX = Var_A * Var_A

sub ax, 8[bp]
add ax, 6[bp] ;AX += Var_C
sub ax, 16

mov bx, 4[bp]
mov [bx], ax

pop bx
pop ax
ret 8 ;sp -= 8 because of 4 parameters
Calc_num endp

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