Instruction: Divide
div rA, rB
div $3, $4
div $0, rA, rB
div rA, IMM32
div $3, 0x12345678
li $at, IMM32 div rA, $at
div rC, rA, IMM32
div $2, $3, 0x12345678
LI $AT, IMM32 div rC, rA, $at