整数序列1,2,3,6,9,18,27,54

Question

我试图生成一个整数序列：1,2,3,6,9,18,27,54,81，依此类推。如果它是奇数，则通过将值添加到自身来计算该序列，如果它是偶数则通过将值添加到它来计算。 我已经多次浏览过我的代码了。我甚至试图在那里放置数字来手工测试。但是，我无法弄清楚我的程序有什么问题。机器仍然无法正确读取。请赐教我这个。我非常感谢你的帮助。非常感谢你。

这是我的代码：

.text
.globl main

 main:
 add $t0,$zero,$zero # initial index
 add $t1,$zero,1000  # terminate loop condition

        addi $at, $at, 1 #1
        add $v0,$at, $at #2
        add $v1,$v0,$at   #3
 L:     andi $a0,$v1,0x01 # check if 1 -> odd, 0 --> even
        beq $a0,$zero,isEven # check to see if it is even
        add $a1, $v1,$v1   # if it is odd, add to itself 
 isEven: add $a1, $v1,$v0     # add value of previous one
        add $v0,$zero,$v1 #v0 =3
        add $v1,$zero,$a1 #6
        addi $t0, $t0,1 # increase index
        bne $t0,$t1,L

Answer 1

以下是MIPS中的工作解决方案：

.data
space: .asciiz ", "
.text
li $t1, 1       #Start at 1
li $t2, 1       #Store last value
li $t4, 1000    #terminate at 1000
li $t7, 2       #For division (divide by 2)

loop:
li $v0, 1
add $a0, $t1, $zero #print $t1
syscall

div $t1, $t7      #divide $t1 by 2
mfhi $t5          #get the remainder
move $t6, $t1     #hang on to what $t1 was originally
beqz $t5, even    #if the remainder is 0, it's even

add $t1,$t1,$t1    #it's odd, so add to itself
move $t2, $t6      #store what $t1 was originally to last value
bgt $t1, $t4, done #if the number is over 1000, we're done
li $v0, 4           #Print a comma and space
la $a0, space
syscall
j loop
even:
add $t1,$t1,$t2    #set $t1 = $t1 + Last value ($t2)
move $t2, $t6      #store what $t1 was originally to last value
bgt $t1, $t4, done #if the number is over 1000, we're done
li $v0, 4           #Print a comma and space
la $a0, space
syscall
j loop
done: