459 /////////////////////////////////////////////////////////////////////////////

   460 #ifndef SERIALGC

   461 

   462 void G1PreBarrierStub::emit_code(LIR_Assembler* ce) {

   463 

   464   // At this point we know that marking is in progress

   465 

   466   __ bind(_entry);

   467   assert(pre_val()->is_register(), "Precondition.");

   468 

   469   Register pre_val_reg = pre_val()->as_register();

   470 

   471   ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false);

   472 

   473   __ cmpptr(pre_val_reg, (int32_t) NULL_WORD);

   474   __ jcc(Assembler::equal, _continuation);

   475   ce->store_parameter(pre_val()->as_register(), 0);

   476   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_pre_barrier_slow_id)));

   477   __ jmp(_continuation);

   478 

   479 }

   480 

   481 jbyte* G1PostBarrierStub::_byte_map_base = NULL;

   482 

   483 jbyte* G1PostBarrierStub::byte_map_base_slow() {

   484   BarrierSet* bs = Universe::heap()->barrier_set();

   485   assert(bs->is_a(BarrierSet::G1SATBCTLogging),

   486          "Must be if we're using this.");

   487   return ((G1SATBCardTableModRefBS*)bs)->byte_map_base;

   488 }

   489 

   490 void G1PostBarrierStub::emit_code(LIR_Assembler* ce) {

   491   __ bind(_entry);

   492   assert(addr()->is_register(), "Precondition.");

   493   assert(new_val()->is_register(), "Precondition.");

   494   Register new_val_reg = new_val()->as_register();

   495   __ cmpptr(new_val_reg, (int32_t) NULL_WORD);

   496   __ jcc(Assembler::equal, _continuation);

   497   ce->store_parameter(addr()->as_register(), 0);

   498   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_post_barrier_slow_id)));

   499   __ jmp(_continuation);

   500 }

   501 

   502 #endif // SERIALGC

   503 /////////////////////////////////////////////////////////////////////////////