Design, write, and test a program which is capable of disassembling MIPS machine

Question

Design, write, and test a program which is capable of disassembling MIPS machine code into the assembly language code for any of your proceeding programs. Input the machine code from one file and output the assembly language code to another file. If you program read "0x3c011001" then your program should output "lui $1.4097" or something similar like "lui $at, 4097" (the first line of code in the figure). Your code should then continue to read in the code value column from the file and interpret them to match the basic column. Addresses can simply be output as addresses, not labels. When your program is no longer able to read code values from the input file, your program should close both files and terminate.

Explanation / Answer

Solution:

Start:
   add $t5, $t5, $zero #ival=zero
   add $t0, $t0, $zero #jval=zero
  
Main:

lp1:
   slt $t1, $t5, $s3 #ival
   beq $t1, $zero, EXIT #if $t1==zero, Exit
   add $t0, $zero, $zero #jval=0
   add $t5, $t5,one #ival++
endlp1

lp2:
   slt $t2, $t0, $s0 #jval<bval
   beq $t2, $zero, lp1 #if $t2 ==zero, goto lp1
   add $t3, $t5, $t0 #$t3=ival+jval
   multi $t4, $t0, four #$t4=$t0 * four
   sll $t4, $t4, two #$t4<two
   add $t4, $t4, $s1 #Dval + $t4
   sw $t3, $t4($s1) # store the word
   addi $t5, $t0, one #jval++
   jval lp2
endlp2
endmain
end

Related Questions

Navigate

• Browse (All)
• Browse D
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.