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assemblymipsmachine-codeinstruction-set

How to convert MIPS instructions to machine code?

I'm stuck at converting the below MIPS instruction to machine code

  sb $t3, 40($s2)
  beq $s0, $s1, Lab1
  j Lab1

  jr $s0

So far, I have

101000  10010       01011       101000
000100  10000       10001       0x00400000

How do I go from here? Since 0x00400000 is address not value, I don't think I translate it into binary. And so on... I can't really find an example to go on from here.

Solution

  • Ah I think I'm getting a better idea now by looking at MIPS: Calculating BEQ into Hexadecimal Machine Code and Lưu's answer.

      beq $s0, $s1, Lab1
=>000100 10000 10001 0x00400000
=>0001 0010 0001 0001 (0x004000040 + 1 away instruction)
=>0001 0010 0001 0001 0000 0000 0000 0101
=12110001
  j Lab1
=>0000 1000 0001 0000 0000 0000 0000 0000
=08100000
  jr $s0
=>0000 0000 0000 0000 0000 0000 0000 1000
=02000008

    So this is what I got. If any error please let me know.