Revert of Remove SIMD.js from V8.

src/ppc/interface-descriptors-ppc.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.
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/interface-descriptors.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 177 matching lines @@
   Register registers[] = {r3, r4};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void AllocateHeapNumberDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   data->InitializePlatformSpecific(0, nullptr, nullptr);
 }
 
+#define SIMD128_ALLOC_DESC(TYPE, Type, type, lane_count, lane_type) \
+  void Allocate##Type##Descriptor::InitializePlatformSpecific(      \
+      CallInterfaceDescriptorData* data) {                          \
+    data->InitializePlatformSpecific(0, nullptr, nullptr);          \
+  }
+SIMD128_TYPES(SIMD128_ALLOC_DESC)
+#undef SIMD128_ALLOC_DESC
+
 void ArrayConstructorDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // kTarget, kNewTarget, kActualArgumentsCount, kAllocationSite
   Register registers[] = {r4, r6, r3, r5};
   data->InitializePlatformSpecific(arraysize(registers), registers, NULL);
 }
 
 void ArrayNoArgumentConstructorDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // register state
@@ skipping 189 matching lines @@
   Register registers[] = {
       r4,  // loaded new FP
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC