Question

Batch numeric conversion: Using the code from Pgm2, create a batch conversion process which reads input data (input type, input data, and output type) from a file but still outputs to the console window. For MARS, the input files are expected in the same directory (folder) where MARS resides, by default. Since the input values are not naturally displayed in the console, this program needs to reflect the input from the file as well as outputting the converted value.

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Here's the program 2 description for reference:

Write a MIPS Assembly Language program which runs interactively to convert between decimal, binary, and hexadecimal.

1. Request input data type.

2. Request input data.

3. Request output data type.

4. Output the data.

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Answer 1

# convert between decimal and hexadecimal.

data

prompt: .asciiz "Enter the decimal number to convert: "

ans: .asciiz "\nHexadecimal equivalent: "

result: .space 8

.text

.globl main

main:

la $a0, prompt

li $v0, 4

syscall

li $v0, 5

syscall

move $t2, $v0 la $a0, ans

li $v0, 4

syscall

li $t0, 8 # counter

la $t3, result # where answer will be stored

Loop: beqz $t0, Exit # branch to exit if counter is equal to zero

rol $t2, $t2, 4 # rotate 4 bits to the left

and $t4, $t2, 0xf # mask with 1111

ble $t4, 9, Sum # if less than or equal to nine, branch to sum addi $t4, $t4, 55

# if greater than nine, add 55

b End

Sum: addi $t4, $t4, 48 # add 48 to result

End: sb $t4, 0($t3) #store hex digit into result

addi $t3, $t3, 1 # increment address counter

addi $t0, $t0, -1 # decrement loop counter

j Loop
Exit:

la $a0, result li $v0, 4

syscall

la $v0, 10

syscall