runtime/interpreter/mterp/mips/op_iput_quick.S

%def op_iput_quick(store="sw"):
    /* For: iput-quick, iput-object-quick */
    /* op vA, vB, offset@CCCC */
    GET_OPB(a2)                            #  a2 <- B
    GET_VREG(a3, a2)                       #  a3 <- fp[B], the object pointer
    FETCH(a1, 1)                           #  a1 <- field byte offset
    GET_OPA4(a2)                           #  a2 <- A(+)
    beqz      a3, common_errNullObject     #  object was null
    GET_VREG(a0, a2)                       #  a0 <- fp[A]
    FETCH_ADVANCE_INST(2)                  #  advance rPC, load rINST
    addu      t0, a3, a1
    GET_INST_OPCODE(t1)                    #  extract opcode from rINST
    GET_OPCODE_TARGET(t1)
    $store    a0, 0(t0)                    #  obj.field (8/16/32 bits) <- a0
    JR(t1)                                 #  jump to next instruction