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56 lines
1.1 KiB
56 lines
1.1 KiB
5 years ago
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# Simple input/output in MIIPS assembly
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# From: http://labs.cs.upt.ro/labs/so2/html/resources/nachos-doc/mipsf.html
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# Start .text segment (program code)
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.text
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.globl main
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main:
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# Print string msg1
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li $v0,4 # print_string syscall code = 4
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la $a0, msg1 # load the address of msg
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syscall
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# Get input A from user and save
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li $v0,5 # read_int syscall code = 5
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syscall
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move $t0,$v0 # syscall results returned in $v0
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# Print string msg2
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li $v0,4 # print_string syscall code = 4
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la $a0, msg2 # load the address of msg2
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syscall
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# Get input B from user and save
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li $v0,5 # read_int syscall code = 5
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syscall
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move $t1,$v0 # syscall results returned in $v0
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# Math!
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add $t0, $t0, $t1 # A = A + B
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# Print string msg3
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li $v0, 4
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la $a0, msg3
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syscall
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# Print sum
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li $v0,1 # print_int syscall code = 1
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move $a0, $t0 # int to print must be loaded into $a0
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syscall
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# Print \n
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li $v0,4 # print_string syscall code = 4
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la $a0, newline
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syscall
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li $v0,10 # exit
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syscall
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# Start .data segment (data!)
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.data
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msg1: .asciiz "Enter A: "
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msg2: .asciiz "Enter B: "
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msg3: .asciiz "A + B = "
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newline: .asciiz "\n"
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