8/7/2019 [ASM] Tinh tong mang 1 chieu
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F:\My ASM CODE\[ASM] Tinh tong mang 1 chieu.asm Thursday, March
31, 2011 1:36 PM
1 # Tinh tong mang 1 chieu
2 # Author: huahongquan2007
3 .data
4 insert:
5 .space 160 # tao khong gian cho 40 phan tu mang
6 prompt:
7 .ascii "Hay nhap cac phan tu cua mang can tinh\n"
8 .asciiz "De ket thuc qua trinh nhap hay nhap so 0 "
9 output:
10 .asciiz "Tong cac phan tu la : \n"
11 .text
12 main:
13 la $a0,prompt # Xuat cau prompt
14 add $v0,$0,4 # PRINT STRING
15 syscall
16
17 la $a0,insert # Load address insert vao $a0
18 addi $t1,$t1,40 # bien COUNT
19 Nhap:
20 add $v0,$0,5 # READ INT
21 syscall
22 sw $v0,0($a0) # Luu gia tri vua nhap vao vi tri $a0 tro
toi
23 addi $a0,$a0,4 # Tang $a0 len 4
24 addi $t1,$t1,-1 # Giam bien COUNT di 1
25 beqz $v0,exit # Neu nhap vao 0 thi ket thuc nhap
26 bnez $t1,Nhap # Neu COUNT != 0 thi lap lai Nhap
27 exit:
28 la $a0,insert # Load address insert vao $a0
29 addi $a1,$a1,40
30 sub $a1,$a1,$t1 # count
31 jal ting_tong
32 addi $s0,$v0,0 # Luu gia tri tong vao $s0
33
34 la $a0,output # Xuat cau output
35 add $v0,$0,4 # PRINT STRING
36 syscall
37 addi $a0,$s0,0
38 addi $v0,$0,1 # PRINT INT
39 syscall
40
41 addi $v0,$0,10 # exit
42 syscall
43 #---------------------------------------------
44 # Ham tinh tong
45 # Su dung bien v0 de luu gia tri tong
46 # Sau moi lan lap se giam $a1 xuong 1 don vi
47 # Neu $a1 = 0 thi ket thuc lap
48 #---------------------------------------------
49 ting_tong:
50 addi $v0,$0,0 # SUM = 0
51 vong_lap:
52 beqz $a1,ket_thuc # Neu count = 0 thi ket_thuc
53 lw $t0,0($a0) # Load gia tri vao #t0
54 add $v0,$v0,$t0 # v0 = v0 + t0
55 addi $a0,$a0,4 # tang a0 len 4
56 addi $a1,$a1,-1 # giam count xuong 1
57 j vong_lap
58
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