vm/mterp/mips/OP_IPUT_OBJECT_JUMBO.S

   1 %default { "store":"sw", "postbarrier":"    #  noop", "prebarrier":"    #  noop", "sqnum":"0" }
   2 %verify "executed"
   3 %verify "null object"
   4 %verify "field already resolved"
   5 %verify "field not yet resolved"
   6 %verify "field cannot be resolved"
   7     /*
   8      * Jumbo 32-bit instance field put.
   9      */
  10     /* iput-object/jumbo vBBBB, vCCCC, field@AAAAAAAA */
  11     FETCH(a1, 1)                           # a1<- aaaa (lo)
  12     FETCH(a2, 2)                           # a2<- AAAA (hi)
  13     FETCH(a0, 4)                           # a0<- CCCC
  14     LOAD_rSELF_methodClassDex(a3)          #  a3 <- DvmDex
  15     sll      a1,a1,16
  16     or       a1, a1, a2                    # a1<- AAAAaaaa
  17     LOAD_base_offDvmDex_pResFields(a2, a3) #  a2 <- pDvmDex->pResFields
  18     GET_VREG(rOBJ, a0)                     #  rOBJ <- fp[B], the object pointer
  19     LOAD_eas2(a0, a2, a1)                  #  a0 <- resolved InstField ptr
  20     # is resolved entry null?
  21     bnez      a0, .L${opcode}_finish       #  no, already resolved
  22     LOAD_rSELF_method(a2)                  #  a2 <- current method
  23     EXPORT_PC()                            #  resolve() could throw
  24     LOAD_base_offMethod_clazz(a0, a2)      #  a0 <- method->clazz
  25     JAL(dvmResolveInstField)               #  v0 <- resolved InstField ptr
  26     b         .L${opcode}_resolved
  27
  28 %break
  29
  30     /*
  31      * Currently:
  32      *  a0 holds resolved field
  33      *  rOBJ holds object
  34      */
  35 .L${opcode}_resolved:
  36     move      a0, v0
  37     beqz      a0, common_exceptionThrown
  38     # fall through to ${opcode}_finish
  39
  40 .L${opcode}_finish:
  41     #BAL(common_squeak${sqnum})
  42     LOAD_base_offInstField_byteOffset(a3, a0) #  a3 <- byte offset of field
  43     FETCH(a1, 3)                              # a1<- BBBB
  44     GET_VREG(a0, a1)                       #  a0 <- fp[BBBB]
  45     lw        a2, offThread_cardTable(rSELF) #  a2 <- card table base
  46     # check object for null
  47     beqz      rOBJ, common_errNullObject   #  object was null
  48     FETCH_ADVANCE_INST(5)                  #  advance rPC, load rINST
  49     GET_INST_OPCODE(t0)                    #  extract opcode from rINST
  50     addu      t2, rOBJ, a3                 #  form address
  51     $prebarrier                            #  releasing store
  52     $store a0, (t2)                        #  obj.field (32 bits) <- a0
  53     $postbarrier
  54     beqz      a0, 1f                       #  stored a null reference?
  55     srl       t1, rOBJ, GC_CARD_SHIFT
  56     addu      t2, a2, t1
  57     sb        a2, (t2)                     #  mark card if not
  58 1:
  59     GOTO_OPCODE(t0)                        #  jump to next instruction
  60