X87: [Atomics] Make Atomics.store a builtin using TF.

src/compiler/x87/code-generator-x87.cc

 // Copyright 2013 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/compiler/code-generator.h"
 
 #include "src/ast/scopes.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 1680 matching lines @@
       break;
     case kX87Poke: {
       int const slot = MiscField::decode(instr->opcode());
       if (HasImmediateInput(instr, 0)) {
         __ mov(Operand(esp, slot * kPointerSize), i.InputImmediate(0));
       } else {
         __ mov(Operand(esp, slot * kPointerSize), i.InputRegister(0));
       }
       break;
     }
+    case kX87Xchgb: {
+      size_t index = 0;
+      Operand operand = i.MemoryOperand(&index);
+      __ xchg_b(i.InputRegister(index), operand);
+      break;
+    }
+    case kX87Xchgw: {
+      size_t index = 0;
+      Operand operand = i.MemoryOperand(&index);
+      __ xchg_w(i.InputRegister(index), operand);
+      break;
+    }
+    case kX87Xchgl: {
+      size_t index = 0;
+      Operand operand = i.MemoryOperand(&index);
+      __ xchg(i.InputRegister(index), operand);
+      break;
+    }
     case kX87PushFloat32:
       __ lea(esp, Operand(esp, -kFloatSize));
       if (instr->InputAt(0)->IsDoubleStackSlot()) {
         __ fld_s(i.InputOperand(0));
         __ fstp_s(MemOperand(esp, 0));
       } else if (instr->InputAt(0)->IsDoubleRegister()) {
         __ fst_s(MemOperand(esp, 0));
       } else {
         UNREACHABLE();
       }
@@ skipping 53 matching lines @@
     }
     case kCheckedLoadWord64:
     case kCheckedStoreWord64:
       UNREACHABLE();  // currently unsupported checked int64 load/store.
       break;
     case kAtomicLoadInt8:
     case kAtomicLoadUint8:
     case kAtomicLoadInt16:
     case kAtomicLoadUint16:
     case kAtomicLoadWord32:
+    case kAtomicStoreWord8:
+    case kAtomicStoreWord16:
+    case kAtomicStoreWord32:
       UNREACHABLE();  // Won't be generated by instruction selector.
       break;
   }
   return kSuccess;
 }  // NOLINT(readability/fn_size)
 
 
 // Assembles a branch after an instruction.
 void CodeGenerator::AssembleArchBranch(Instruction* instr, BranchInfo* branch) {
   X87OperandConverter i(this, instr);
@@ skipping 684 matching lines @@
     int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc;
     __ Nop(padding_size);
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8