WIP Atomics

src/compiler/x64/instruction-selector-x64.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <algorithm>
 
 #include "src/base/adapters.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
@@ skipping 128 matching lines @@
   outputs[0] = g.DefineAsRegister(node);
   InstructionOperand inputs[3];
   size_t input_count = 0;
   AddressingMode mode =
       g.GetEffectiveAddressMemoryOperand(node, inputs, &input_count);
   InstructionCode code = opcode | AddressingModeField::encode(mode);
   Emit(code, 1, outputs, input_count, inputs);
 }
 
 
+void InstructionSelector::VisitLoadAtomic(Node* node) {
+  MachineType rep = RepresentationOf(OpParameter<LoadRepresentation>(node));
+  MachineType typ = TypeOf(OpParameter<LoadRepresentation>(node));
+  X64OperandGenerator g(this);
+
+  ArchOpcode opcode;
+  switch (rep) {
+    case kRepFloat32:
+      opcode = kX64Movss;
+      break;
+    case kRepFloat64:
+      opcode = kX64Movsd;
+      break;
+    case kRepBit:  // Fall through.
+    case kRepWord8:
+      opcode = typ == kTypeInt32 ? kX64Movsxbl : kX64Movzxbl;
+      break;
+    case kRepWord16:
+      opcode = typ == kTypeInt32 ? kX64Movsxwl : kX64Movzxwl;
+      break;
+    case kRepWord32:
+      opcode = kX64Movl;
+      break;
+    case kRepTagged:
+    case kRepWord64:
+    default:
+      UNREACHABLE();
+      return;
+  }
+
+  InstructionOperand outputs[1];
+  outputs[0] = g.DefineAsRegister(node);
+  InstructionOperand inputs[3];
+  size_t input_count = 0;
+  AddressingMode mode =
+      g.GetEffectiveAddressMemoryOperand(node, inputs, &input_count);
+  InstructionCode code = opcode | AddressingModeField::encode(mode);
+  Emit(code, 1, outputs, input_count, inputs);
+}
+
+
 void InstructionSelector::VisitStore(Node* node) {
   X64OperandGenerator g(this);
   Node* base = node->InputAt(0);
   Node* index = node->InputAt(1);
   Node* value = node->InputAt(2);
 
   StoreRepresentation store_rep = OpParameter<StoreRepresentation>(node);
   MachineType rep = RepresentationOf(store_rep.machine_type());
   if (store_rep.write_barrier_kind() == kFullWriteBarrier) {
     DCHECK_EQ(kRepTagged, rep);
@@ skipping 1468 matching lines @@
   if (CpuFeatures::IsSupported(SSE4_1)) {
     flags |= MachineOperatorBuilder::kFloat64RoundDown |
              MachineOperatorBuilder::kFloat64RoundTruncate;
   }
   return flags;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8