Revert of Remove SIMD.js from V8.

src/code-stubs.h

 // Copyright 2012 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.
 
 #ifndef V8_CODE_STUBS_H_
 #define V8_CODE_STUBS_H_
 
 #include "src/allocation.h"
 #include "src/assembler.h"
 #include "src/codegen.h"
@@ skipping 48 matching lines @@
   /* --- HydrogenCodeStubs --- */             \
   /* These should never be ported to TF */    \
   /* because they are either used only by */  \
   /* FCG/Crankshaft or are deprecated */      \
   V(BinaryOpIC)                               \
   V(BinaryOpWithAllocationSite)               \
   V(ToBooleanIC)                              \
   V(TransitionElementsKind)                   \
   /* --- TurboFanCodeStubs --- */             \
   V(AllocateHeapNumber)                       \
+  V(AllocateFloat32x4)                        \
+  V(AllocateInt32x4)                          \
+  V(AllocateUint32x4)                         \
+  V(AllocateBool32x4)                         \
+  V(AllocateInt16x8)                          \
+  V(AllocateUint16x8)                         \
+  V(AllocateBool16x8)                         \
+  V(AllocateInt8x16)                          \
+  V(AllocateUint8x16)                         \
+  V(AllocateBool8x16)                         \
   V(ArrayNoArgumentConstructor)               \
   V(ArraySingleArgumentConstructor)           \
   V(ArrayNArgumentsConstructor)               \
   V(CreateAllocationSite)                     \
   V(CreateWeakCell)                           \
   V(StringLength)                             \
   V(AddWithFeedback)                          \
   V(SubtractWithFeedback)                     \
   V(MultiplyWithFeedback)                     \
   V(DivideWithFeedback)                       \
@@ skipping 1472 matching lines @@
  public:
   explicit AllocateHeapNumberStub(Isolate* isolate)
       : TurboFanCodeStub(isolate) {}
 
   void InitializeDescriptor(CodeStubDescriptor* descriptor) override;
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(AllocateHeapNumber);
   DEFINE_TURBOFAN_CODE_STUB(AllocateHeapNumber, TurboFanCodeStub);
 };
 
+#define SIMD128_ALLOC_STUB(TYPE, Type, type, lane_count, lane_type)            \
+  class Allocate##Type##Stub : public TurboFanCodeStub {                       \
+   public:                                                                     \
+    explicit Allocate##Type##Stub(Isolate* isolate)                            \
+        : TurboFanCodeStub(isolate) {}                                         \
+                                                                               \
+    void InitializeDescriptor(CodeStubDescriptor* descriptor) override;        \
+    void GenerateAssembly(compiler::CodeAssemblerState* state) const override; \
+                                                                               \
+    DEFINE_CALL_INTERFACE_DESCRIPTOR(Allocate##Type);                          \
+    DEFINE_CODE_STUB(Allocate##Type, TurboFanCodeStub);                        \
+  };
+SIMD128_TYPES(SIMD128_ALLOC_STUB)
+#undef SIMD128_ALLOC_STUB
+
 class CommonArrayConstructorStub : public TurboFanCodeStub {
  protected:
   CommonArrayConstructorStub(Isolate* isolate, ElementsKind kind,
                              AllocationSiteOverrideMode override_mode)
       : TurboFanCodeStub(isolate) {
     // It only makes sense to override local allocation site behavior
     // if there is a difference between the global allocation site policy
     // for an ElementsKind and the desired usage of the stub.
     DCHECK(override_mode != DISABLE_ALLOCATION_SITES ||
            AllocationSite::GetMode(kind) == TRACK_ALLOCATION_SITE);
@@ skipping 151 matching lines @@
       return ::v8::internal::UNINITIALIZED;
     } else {
       return MONOMORPHIC;
     }
   }
 
  private:
   ToBooleanICStub(Isolate* isolate, InitializationState init_state)
       : HydrogenCodeStub(isolate, init_state) {}
 
-  static const int kNumHints = 8;
+  static const int kNumHints = 9;
   STATIC_ASSERT(static_cast<int>(ToBooleanHint::kAny) ==
                 ((1 << kNumHints) - 1));
   class HintsBits : public BitField<uint16_t, 0, kNumHints> {};
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(TypeConversion);
   DEFINE_HYDROGEN_CODE_STUB(ToBooleanIC, HydrogenCodeStub);
 };
 
 class ElementsTransitionAndStoreStub : public TurboFanCodeStub {
  public:
@@ skipping 106 matching lines @@
 #undef DEFINE_PLATFORM_CODE_STUB
 #undef DEFINE_HANDLER_CODE_STUB
 #undef DEFINE_HYDROGEN_CODE_STUB
 #undef DEFINE_CODE_STUB
 #undef DEFINE_CODE_STUB_BASE
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CODE_STUBS_H_