dalvik/vm/mterp/armv6t2/OP_IGET.S

   1 %default { "load":"ldr", "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      * General 32-bit instance field get.
   9      *
  10      * for: iget, iget-object, iget-boolean, iget-byte, iget-char, iget-short
  11      */
  12     /* op vA, vB, field@CCCC */
  13     mov     r0, rINST, lsr #12          @ r0<- B
  14     ldr     r3, [rGLUE, #offGlue_methodClassDex]    @ r3<- DvmDex
  15     FETCH(r1, 1)                        @ r1<- field ref CCCC
  16     ldr     r2, [r3, #offDvmDex_pResFields] @ r2<- pDvmDex->pResFields
  17     GET_VREG(r9, r0)                    @ r9<- fp[B], the object pointer
  18     ldr     r0, [r2, r1, lsl #2]        @ r0<- resolved InstField ptr
  19     cmp     r0, #0                      @ is resolved entry null?
  20     bne     .L${opcode}_finish          @ no, already resolved
  21 8:  ldr     r2, [rGLUE, #offGlue_method]    @ r2<- current method
  22     EXPORT_PC()                         @ resolve() could throw
  23     ldr     r0, [r2, #offMethod_clazz]  @ r0<- method->clazz
  24     bl      dvmResolveInstField         @ r0<- resolved InstField ptr
  25     cmp     r0, #0
  26     bne     .L${opcode}_finish
  27     b       common_exceptionThrown
  28 %break
  29
  30     /*
  31      * Currently:
  32      *  r0 holds resolved field
  33      *  r9 holds object
  34      */
  35 .L${opcode}_finish:
  36     @bl      common_squeak${sqnum}
  37     cmp     r9, #0                      @ check object for null
  38     ldr     r3, [r0, #offInstField_byteOffset]  @ r3<- byte offset of field
  39     beq     common_errNullObject        @ object was null
  40     $load   r0, [r9, r3]                @ r0<- obj.field (8/16/32 bits)
  41     ubfx    r2, rINST, #8, #4           @ r2<- A
  42     FETCH_ADVANCE_INST(2)               @ advance rPC, load rINST
  43     GET_INST_OPCODE(ip)                 @ extract opcode from rINST
  44     SET_VREG(r0, r2)                    @ fp[A]<- r0
  45     GOTO_OPCODE(ip)                     @ jump to next instruction