I'm working on a program using MIPS native instructions, that will allow user to input three decimal numbers as null terminated strings.
Each number can't exceed six digits. If the user inputs a comma (e.g 123,456) remove the comma from memory.
The first number stored in memory address 0x10000000, the second in 0x10000008, and the third in 0x10000010.
My code just keeps looping over and over again at the
firstNumCounterChrCode doesn't increment $t0
- Code doesn't increment next byte in address
My code is inefficient. I know that already, but I find it easier like this than using subroutines cause I hardly understand MIPS.
Please suggest.
Code
.globl main
.globl main2
.globl main3
.globl firstNumCountChr
.globl firstIncremincrem
.globl secondNumCountChr
.globl secondNumIncrem
.globl thirdNumCountChr
.globl thirdNumInCrem
.data
.text
# 0x10000000 will store first number
# 0x10000008 will store second number
# 0x10000010 will store third number
main:
#Input first number
lui $a0, 0x1000
ori $a0, 0x0000 #reads number into memory(0x10000000)
addi $a1, $0, 8 #7 characters
addi $v0, $0, 8
syscall
#removing comma of first number
addi $t1, 0 #$t1 is the counter set to 0
add $t3, 0x2c # 0x2c is acsii of "," in hex
firstNumCountChr:
lb $t2, 0($a0) #load first byte from address in $a0
beq $t2, $0, end #if $t2 == 0 go to end
or $0, $0, $0 #NOP
bne $t2, $t3, firstNumIncrem #branch if symbol doesn't equal ","
or $0, $0, $0
add $t4, $a0, $0 #$t4 will save position of ","
firstNumIncrem:
addi $t0, $0, 1 #increment address
addi $t1, $t1, 1 #increment counter
j firstNumCountChr #loop
main2:
#inputing second number
lui $a0, 0x1000
ori $a0, 0x0008 #reads number into memory(0x10000008)
addi $a1,$0, 8 #7 characters
addi $v0, $0, 8
syscall
#removing comma of second number
addi $t1, 0 # $t1 is the counter set to 0
add $t3, 0x2c # 0x2c is acsii of "," in hex
secondNumCountChr:
lb $t2, 0($a0) # load first byte from address in $a0
beq $t2, $0, end # if $t2 == 0 go to end
or $0, $0, $0 # NOP
bne $t2, $t3, secondNumIncrem # branch if symbol doesn't equal ","
or $0, $0, $0 # NOP
add $t4, $a0, $0 # $t4 will save position of ","
secondNumIncrem:
addi $t0, $0, 1 #increment address
addi $t1, $t1, 1 #increment counter
j secondNumCountChr #loop
main3:
#inputting third number
lui $a0, 0x1000
ori $a0, 0x0010 #reads number into memory(0x10000010)
addi $a1, $0, 8 #7 characters
addi $v0,$0, 8
syscall
#removing comma of third number
addi $t1, 0 #$t1 is the counter set to 0
add $t3, 0x2c # 0x2c is acsii of "," in hex
thirdNumCountChr:
lb $t2, 0($a0) #load first byte from address in $a0
beq $t2, $0, end # if $t2 == 0 go to end
or $0, $0, $0
bne $t2, $t3, thirdNumIncrem #branch if symbol doesn't equal ","
or $0, $0, $0
add $t4, $a0, $0 # $t4 will save position of ","
thirdNumIncrem:
addi $t0, $0, 1 #increment address
addi $t1, $t1, 1 #increment counter
j thirdNumIncrem #loop
end:
add $0, $0, $0
