我正在嘗試為我的作業優化我的代碼。我需要將總能量輸出減少至少 5%。我在下面包含了我的代碼。到目前為止，我只能將能量輸出減少 2%。這是通過調整我的子 $t0,$t0, 32 并引入另一個初始化為 -32 的暫存器（$t8）并將上面的代碼替換為 add $t0,$t0,$t8 來實作的。這行代碼在標簽下小寫點。
該代碼的目的是輸入一個句子并計算特定字母的字符數，然后以數字和井號顯示該計數。
我一直盯著我的代碼幾個小時，試圖弄清楚我能做什么，但沒有什么是跳出來的。任何幫助，將不勝感激。
謝謝
#NAme
#Comp Org
#Homework 2A
.data
string: .asciiz "\nEnter A String:" #prompts the user to input a string
input: .space 1000
.text
li $v0,4 #printing the string
la $a0,string #prompt for the string
syscall #executing
li $v0,8
la $a0,input #prompting for the users input
li $a1,1000 #loading 1000 into the register
syscall
move $s0,$a0 #moving the data into the new register
li $t0,0 #this register will be used for the count of c
li $t1,0 #this register will be used for the count of h
li $t2,0 #this register will be used for the count of a
li $t3,0 #this register will be used for the count of r
li $t4,0 #this register will be used for the count of e
li $t5,0 #this register will be used for the count of o
li $t6,0 #this register will be used for the count of n
li $t7,0 #this register will be used for the count of g
li $t8,-32 #this will be used for the addition
loop: #loop for the string
lb $a0,0($s0) #load the first character into $a0
addi $s0,$s0,1 #used as an index and increments by 1
beq $a0,$zero,done #used as the else clause
sge $s5,$a0,'a' #checks for the lowercase range
sle $s6,$a0,'z' #checks for the lowercase range
and $s5,$s5,$s6 #and condition used to check between the range of lowercase
beq $s5,1,lowercaseCount #branch to lowercase label
j calculate #jump to calculate label
lowercaseCount:
add $a0,$a0,$t8 #subtracts 32 from the value stored in $a0
calculate:
beq $a0,'C',cCount #branching and checking for capital occurences for each one
beq $a0,'H',hCount
beq $a0,'A',aCount
beq $a0,'R',rCount
beq $a0,'E',eCount
beq $a0,'O',oCount
beq $a0,'G',gCount
beq $a0,'N',nCount
j exitCount
gCount:
add $t7,$t7,1 #incrementing gCount by 1
j exitCount
cCount:
add $t0,$t0,1 #Incrementing cCount by 1
j exitCount
hCount:
add $t1,$t1,1 #incrementing hCount by 1
j exitCount
aCount:
add $t2,$t2,1 #Incrementing aCount by 1
j exitCount
rCount:
add $t3,$t3,1 #incrementing rCount by 1
j exitCount
eCount:
add $t4,$t4,1 #Incrementing eCount by 1
j exitCount
oCount:
add $t5,$t5,1 #incrementing oCount by 1
j exitCount
nCount:
add $t6,$t6,1 #incrementing nCount by 1
exitCount:
j loop
done:
li $a0,'C' #checks for the uppercase letter and moves into the new register
move $a1,$t0 #and moves into the new register
jal printCount
li $a0,'H' #checks for the uppercase letter and moves into the new register
move $a1,$t1 #and moves into the new register
jal printCount
li $a0,'A' #checks for the uppercase letter and moves into the new register
move $a1,$t2 #and moves into the new register
jal printCount
li $a0,'R' #checks for the uppercase letter and moves into the new register
move $a1,$t3 #and moves into the new register
jal printCount
#li $a0,'G' #checks for the uppercase letter and moves into the new register
#move $a1,$t7 #and moves into the new register
#jal printCount
li $a0,'E' #checks for the uppercase letter and moves into the new register
move $a1,$t4 #and moves into the new register
jal printCount
li $a0,'O' #checks for the uppercase letter and moves into the new register
move $a1,$t5 #and moves into the new register
jal printCount
li $a0,'N' #checks for the uppercase letter and moves into the new register
move $a1,$t6 #and moves into the new register
jal printCount
li $a0,'G' #checks for the uppercase letter and moves into the new register
move $a1,$t7 #and moves into the new register
jal printCount
move $v0,$a0 #moves the register
li $v0,11 #prints the character
syscall
li $a0, 'C' #loads C into register
move $a1,$t0 #moves value of $t0 into a1
syscall
jal printhash #jump and link to printhash
li $a0, 'H' #loads H into register
move $a1,$t1 #moves value of $t1 into $a1
syscall
jal printhash #jump n link to printhash
li $a0, 'A' #loads A into register
move $a1,$t2 #move the register from $t2 into $a1
syscall
jal printhash
li $a0, 'R' #loads R into register
move $a1,$t3 #move the register from $t3 into $a1
syscall
jal printhash #jumps to printhash
li $a0,'E' #loads E into register
move $a1,$t4 #move the register from $t4 into $a1
syscall
jal printhash #jumps to printhash
li $a0, 'O' #loads O into register
move $a1,$t5 #move the register from $t5 into $a1
syscall
jal printhash #jumps to print hash
li $a0,'N' #loads N into register
move $a1,$t6 #move the register from $t6 into $a1
syscall
jal printhash #jumps to printhash
li $a0, 'G' #loads G into register
move $a1,$t7 #move the register from $t7 into $a1
syscall
jal printhash #jumps to printhash
li $v0,10 #syscall to terminate the program once this loop has been executed
syscall
printCount:
move $v0,$a0 #prints the character
li $v0,11
syscall
li $a0,':' #prints the character
li $v0,11
syscall
move $a0,$a1 #prints the current count
li $v0,1
syscall
li $a0,'\n' #prints the newline
li $v0,11
syscall
jr $ra
printhash:
#move $v0,$a0 #prints the character
#li $v0,11
#syscall
li $a0,':' #prints the character
li $v0,11
syscall
move $a0,$a1 #prints the current count
li $s7,0 #indexing for the loop
hash:
bge $s7,$a1,exithash #loop condition branch to exit loop if equal
li $a0,'#' #loads # into the register
syscall
addi $s7,$s7,1 #adding 1 to the value in the register $s7
j hash #jumping back to the start of the loop
exithash: #label of exit loop
li $a0,'\n' #loading new line
li $v0,11 #printing the new line
syscall #executing syscal
jr $ra #jumping back to register $t1
uj5u.com熱心網友回復：
你有：
beq .... lowercaseCount
j calculate
lowercaseCount:
...
calculate:
這beq圍繞單個跳轉指令進行分支。那可以優化去除跳轉，如下：分支代替計算，在相反的條件下！
bne calculate
...
calculate:
此外，您擁有j exitCount并且確實如此j loop。
這是到另一個無條件分支的無條件分支，可以對其進行優化。更換所有j exit有j loop跳過不必要的一跳。
轉載請註明出處，本文鏈接：https://www.uj5u.com/houduan/357365.html
上一篇：我應該如何在IBMz/OS匯編器中獲取輸入和列印輸出？
下一篇：匯編跳轉后是否清除比較標志？