MIPS: Make the speed of incremental marking depend also on the rate at which we are...

Port r12618 (c621b025)

BUG=
TEST=

Review URL: https://codereview.chromium.org/10977070
Patch from Akos Palfi <palfia@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12740 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

diff --git a/src/mips/code-stubs-mips.cc b/src/mips/code-stubs-mips.cc
index 0b551fb..73b37a0 100644 (file)
--- a/src/mips/code-stubs-mips.cc
+++ b/src/mips/code-stubs-mips.cc
@@ -7633,6 +7633,16 @@ void RecordWriteStub::CheckNeedsToInformIncrementalMarker(
   Label need_incremental;
   Label need_incremental_pop_scratch;
 
+  __ And(regs_.scratch0(), regs_.object(), Operand(~Page::kPageAlignmentMask));
+  __ lw(regs_.scratch1(),
+        MemOperand(regs_.scratch0(),
+                   MemoryChunk::kWriteBarrierCounterOffset));
+  __ Subu(regs_.scratch1(), regs_.scratch1(), Operand(1));
+  __ sw(regs_.scratch1(),
+         MemOperand(regs_.scratch0(),
+                    MemoryChunk::kWriteBarrierCounterOffset));
+  __ Branch(&need_incremental, lt, regs_.scratch1(), Operand(zero_reg));
+
   // Let's look at the color of the object:  If it is not black we don't have
   // to inform the incremental marker.
   __ JumpIfBlack(regs_.object(), regs_.scratch0(), regs_.scratch1(), &on_black);