48 lines
943 B
ArmAsm
48 lines
943 B
ArmAsm
# print(hex(0b11001))
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.text
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main:
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li $t0, 25 # t0 = 0b11001
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li $t1, 0 # t1 = 0
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li $t9, 9 # t9 = 9
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reverse:
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beqz $t0, done # if (!t0) goto done
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andi $t2, $t0, 0xf # t2 = t0 & 0xf
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sra $t0, $t0, 4 # t0 >>= 4
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sll $t1, $t1, 4 # t1 <<= 4
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add $t1, $t1, $t2 # t1 += t2
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j reverse # goto reverse
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done:
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li $v0, 11 # print character
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li $a0, 48 # 0
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syscall
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li $v0, 11 # print character
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li $a0, 120 # x
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syscall
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bnez $t1, print # if (!t1) goto print
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li $v0, 11 # print character
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li $a0, 48 # 0
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syscall
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j end # goto end
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print:
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beqz $t1, end # if (!t1) goto end
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andi $t2, $t1, 0xf # t2 = t1 & 0xf
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sra $t1, $t1, 4 # t1 >>= 4
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addi $a0, $t2, 48 # a0 = chr(t2), sort of
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ble $t2, $t9, put # if (t2 <= 9) goto put
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addi $a0, $a0, 7 # a0 += 7
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put:
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li $v0, 11 # print character at a0
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syscall
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j print # goto print
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end:
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li $v0, 11 # print character
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li $a0, 10 # newline
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syscall
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li $v0, 10 # terminate
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syscall
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