%default { "load":"lw", "barrier":" # noop", "sqnum":"0" } %verify "executed" %verify "null object" %verify "field already resolved" %verify "field not yet resolved" %verify "field cannot be resolved" /* * General 32-bit instance field get. * * for: iget, iget-object, iget-boolean, iget-byte, iget-char, iget-short */ # op vA, vB, field /* CCCC */ GET_OPB(a0) # a0 <- B LOAD_rSELF_methodClassDex(a3) # a3 <- DvmDex FETCH(a1, 1) # a1 <- field ref CCCC LOAD_base_offDvmDex_pResFields(a2, a3) # a2 <- pDvmDex->pResFields GET_VREG(rOBJ, a0) # rOBJ <- fp[B], the object pointer LOAD_eas2(a0, a2, a1) # a0 <- resolved InstField ptr # is resolved entry null? bnez a0, .L${opcode}_finish # no, already resolved LOAD_rSELF_method(a2) # a2 <- current method EXPORT_PC() # resolve() could throw LOAD_base_offMethod_clazz(a0, a2) # a0 <- method->clazz JAL(dvmResolveInstField) # v0 <- resolved InstField ptr # test results move a0, v0 bnez v0, .L${opcode}_finish b common_exceptionThrown %break /* * Currently: * v0 holds resolved field * rOBJ holds object (caller saved) */ .L${opcode}_finish: #BAL(common_squeak${sqnum}) LOAD_base_offInstField_byteOffset(a3, a0) # a3 <- byte offset of field # check object for null beqz rOBJ, common_errNullObject # object was null addu a3, a3, rOBJ # form address $load a0, (a3) # a0 <- obj.field (8/16/32 bits) $barrier # acquiring load GET_OPA4(a2) # a2 <- A+ FETCH_ADVANCE_INST(2) # advance rPC, load rINST GET_INST_OPCODE(t0) # extract opcode from rINST SET_VREG(a0, a2) # fp[A] <- a0 GOTO_OPCODE(t0) # jump to next instruction