src/cpu/sparc/vm/macroAssembler_sparc.cpp
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rev 5353 : [mq]: filtering.diff
@@ -3750,24 +3750,30 @@
CodeBuffer buf(bb);
MacroAssembler masm(&buf);
#define __ masm.
address start = __ pc();
- Label not_already_dirty, restart, refill;
+ Label not_already_dirty, restart, refill, young_card;
#ifdef _LP64
__ srlx(O0, CardTableModRefBS::card_shift, O0);
#else
__ srl(O0, CardTableModRefBS::card_shift, O0);
#endif
AddressLiteral addrlit(byte_map_base);
__ set(addrlit, O1); // O1 := <card table base>
__ ldub(O0, O1, O2); // O2 := [O0 + O1]
+ __ cmp_and_br_short(O2, G1SATBCardTableModRefBS::g1_young_card_val(), Assembler::equal, Assembler::pt, young_card);
+
+ __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad));
+ __ ldub(O0, O1, O2); // O2 := [O0 + O1]
+
assert(CardTableModRefBS::dirty_card_val() == 0, "otherwise check this code");
__ cmp_and_br_short(O2, G0, Assembler::notEqual, Assembler::pt, not_already_dirty);
+ __ bind(young_card);
// We didn't take the branch, so we're already dirty: return.
// Use return-from-leaf
__ retl();
__ delayed()->nop();