[Atomics] Make Atomics.store a builtin using TF

src/compiler/arm/instruction-selector-arm.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 "src/base/adapters.h"
 #include "src/base/bits.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 
@@ skipping 1817 matching lines @@
       opcode = kAtomicLoadWord32;
       break;
     default:
       UNREACHABLE();
       return;
   }
   Emit(opcode | AddressingModeField::encode(kMode_Offset_RR),
        g.DefineAsRegister(node), g.UseRegister(base), g.UseRegister(index));
 }
 
+void InstructionSelector::VisitAtomicStore(Node* node) {
+  MachineRepresentation rep = AtomicStoreRepresentationOf(node->op());
+  ArmOperandGenerator g(this);
+  Node* base = node->InputAt(0);
+  Node* index = node->InputAt(1);
+  Node* value = node->InputAt(2);
+  ArchOpcode opcode = kArchNop;
+  switch (rep) {
+    case MachineRepresentation::kWord8:
+      opcode = kAtomicStoreWord8;
+      break;
+    case MachineRepresentation::kWord16:
+      opcode = kAtomicStoreWord16;
+      break;
+    case MachineRepresentation::kWord32:
+      opcode = kAtomicStoreWord32;
+      break;
+    default:
+      UNREACHABLE();
+      return;
+  }
+
+  AddressingMode addressing_mode = kMode_Offset_RR;
+  InstructionOperand inputs[4];
+  size_t input_count = 0;
+  inputs[input_count++] = g.UseUniqueRegister(base);
+  inputs[input_count++] = g.UseUniqueRegister(index);
+  inputs[input_count++] = g.UseUniqueRegister(value);
+  InstructionCode code = opcode | AddressingModeField::encode(addressing_mode);
+  Emit(code, 0, nullptr, input_count, inputs);
+}
+
 // static
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {
   MachineOperatorBuilder::Flags flags =
       MachineOperatorBuilder::kInt32DivIsSafe |
       MachineOperatorBuilder::kUint32DivIsSafe;
   if (CpuFeatures::IsSupported(ARMv7)) {
     flags |= MachineOperatorBuilder::kWord32ReverseBits;
   }
   if (CpuFeatures::IsSupported(ARMv8)) {
@@ skipping 10 matching lines @@
              MachineOperatorBuilder::kFloat32Max |
              MachineOperatorBuilder::kFloat64Min |
              MachineOperatorBuilder::kFloat64Max;
   }
   return flags;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8