--- a/hotspot/src/cpu/sparc/vm/macroAssembler_sparc.cpp Fri Oct 04 13:33:02 2013 +0200
+++ b/hotspot/src/cpu/sparc/vm/macroAssembler_sparc.cpp Tue Oct 08 17:35:51 2013 +0200
@@ -3752,7 +3752,7 @@
#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);
@@ -3763,9 +3763,15 @@
__ 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();