90 lines
1.4 KiB
ArmAsm
90 lines
1.4 KiB
ArmAsm
# THIS ASSEMBLY FILE CONTAINS THE CALCULATOR'S CODE OF TWO NUMBERS
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.section .rodata
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prompt_msg: .string "Calculator:\n Type [+]: SUM\n Type [-]: SUB\n Type [*]: MUL\n"
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prompt_size: .byte .-prompt_msg
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first_number: .string "Type the first number:\n"
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second_number: .string "Type the second number:\n"
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second_number_size: .byte .-second_number
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first_number_size: .byte .-first_number
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buffer_size: .byte .-buffer
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buffer_first_number_size: .byte .-buffer_first_number
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buffer_second_number_size: .byte .-buffer_second_number_size
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.section .bss
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buffer: .space 255
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buffer_first_number: .space 255
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buffer_second_number: .space 255
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.section .text
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.global _start
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_start:
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la a1, prompt_msg
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lbu a2, prompt_size
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call prompt
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la a1, buffer
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lbu a2, buffer_size
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call read
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la a1, first_number
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lbu a2, first_number_size
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call prompt
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la a1, buffer_first_number
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lbu a2, buffer_first_number_size
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call read
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la a1, second_number
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lbu a2, second_number_size
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call prompt
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la a1, buffer_second_number
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lbu a2, buffer_second_number_size
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call read
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#call switch_case
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#call print
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call exit
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#print:
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# addi a0, zero, 1
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# mov a1, t0
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# add a2, zero, t1
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# addi a7, zero, 64
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# ecall
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# ret
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read:
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addi a0, zero, 0
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addi a7, zero, 63
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ecall
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ret
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prompt:
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addi a0, zero, 1
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addi a7, zero, 64
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ecall
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ret
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#switch_case:
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exit:
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add a0, zero, zero
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addi a7, zero, 93
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ecall
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ret
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