Thread-local store buffers, v2

runtime/vm/stub_code_arm64.cc

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/assembler.h"
 #include "vm/code_generator.h"
 #include "vm/compiler.h"
@@ skipping 1017 matching lines @@
 
   __ Bind(&add_to_buffer);
   // Save values being destroyed.
   __ Push(R1);
   __ Push(R2);
   __ Push(R3);
 
   __ orri(R2, TMP, Immediate(1 << RawObject::kRememberedBit));
   __ StoreFieldToOffset(R2, R0, Object::tags_offset(), kNoPP);
 
-  // Load the isolate.
-  // Spilled: R1, R2, R3.
-  // R0: address being stored.
-  __ LoadIsolate(R1, kNoPP);
-
-  // Load the StoreBuffer block out of the isolate. Then load top_ out of the
+  // Load the StoreBuffer block out of the thread. Then load top_ out of the
   // StoreBufferBlock and add the address to the pointers_.
-  // R1: isolate.
-  __ LoadFromOffset(R1, R1, Isolate::store_buffer_offset(), kNoPP);
+  __ LoadFromOffset(R1, THR, Thread::store_buffer_block_offset(), kNoPP);
   __ LoadFromOffset(R2, R1, StoreBufferBlock::top_offset(),
                     kNoPP, kUnsignedWord);
   __ add(R3, R1, Operand(R2, LSL, 3));
   __ StoreToOffset(R0, R3, StoreBufferBlock::pointers_offset(), kNoPP);
 
   // Increment top_ and check for overflow.
   // R2: top_.
   // R1: StoreBufferBlock.
   Label L;
   __ add(R2, R2, Operand(1));
   __ StoreToOffset(R2, R1, StoreBufferBlock::top_offset(),
                    kNoPP, kUnsignedWord);
   __ CompareImmediate(R2, StoreBufferBlock::kSize, kNoPP);
   // Restore values.
   __ Pop(R3);
   __ Pop(R2);
   __ Pop(R1);
   __ b(&L, EQ);
   __ ret();
 
   // Handle overflow: Call the runtime leaf function.
   __ Bind(&L);
   // Setup frame, push callee-saved registers.
 
   __ EnterCallRuntimeFrame(0 * kWordSize);
-  __ LoadIsolate(R0, kNoPP);
+  __ mov(R0, THR);
   __ CallRuntime(kStoreBufferBlockProcessRuntimeEntry, 1);
   // Restore callee-saved registers, tear down frame.
   __ LeaveCallRuntimeFrame();
   __ ret();
 }
 
 
 // Called for inline allocation of objects.
 // Input parameters:
 //   LR : return address.
@@ skipping 1070 matching lines @@
 // Result:
 //  R1: entry point.
 void StubCode::GenerateMegamorphicLookupStub(Assembler* assembler) {
   EmitMegamorphicLookup(assembler, R0, R1, R1);
   __ ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64