56 lines
1.1 KiB
NASM
56 lines
1.1 KiB
NASM
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.data
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str1: .asciiz "Introduza dois numeros: "
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str2: .asciiz "Resultado: "
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.eqv print_int, 1
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.eqv print_string, 4
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.eqv read_int, 5
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.text
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.globl main
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# Mapa de registos
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# $t0: res
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# $t1: mdor
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# $t2: mdo
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# $t3: i
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main: la $a0, str1
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li $v0, print_string
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syscall # print_string("Introduza dois numeros: ");
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li $v0, read_int
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syscall # read_int()
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move $t1, $v0 # mdor = read_int();
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andi $t1, $t1, 0x0000FFFF # mdor = mdor & 0x0000FFFF;
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li $v0, read_int
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syscall # read_int()
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move $t2, $v0 # mdo = read_int();
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andi $t2, $t2, 0x0000FFFF # mdo = mdo & 0x0000FFFF;
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li $t0, 0 # res = 0;
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li $t3, 0 # i = 0;
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while: beq $t1, 0, endw # while (mdor != 0)
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bge $t3, 16, endw # while (i < 4) {
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if: andi $t4, $t1, 0x00000001 # $t4 = mdor & 0x00000001;
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beq $t4, 0, else
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add $t0, $t0, $t2 # res = res + mdo;
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else: sll $t2, $t2, 1 # mdo = mdo << 1;
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srl $t1, $t1, 1 # mdor = mdor >> 1;
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addi $t3, $t3, 1 # i++;
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j while # }
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endw: la $a0, str2
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li $v0, print_string
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syscall # print_string("Resultado: ");
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li $v0, print_int
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move $a0, $t0 # print_int(res);
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syscall
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jr $ra # return
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