Revert of Remove SIMD.js from V8.

src/heap/heap.cc

 // 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.
 
 #include "src/heap/heap.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/ast/context-slot-cache.h"
 #include "src/base/bits.h"
@@ skipping 2249 matching lines @@
 
     ALLOCATE_VARSIZE_MAP(FIXED_ARRAY_TYPE, scope_info)
     ALLOCATE_VARSIZE_MAP(FIXED_ARRAY_TYPE, module_info)
     ALLOCATE_VARSIZE_MAP(FIXED_ARRAY_TYPE, feedback_vector)
     ALLOCATE_PRIMITIVE_MAP(HEAP_NUMBER_TYPE, HeapNumber::kSize, heap_number,
                            Context::NUMBER_FUNCTION_INDEX)
     ALLOCATE_MAP(MUTABLE_HEAP_NUMBER_TYPE, HeapNumber::kSize,
                  mutable_heap_number)
     ALLOCATE_PRIMITIVE_MAP(SYMBOL_TYPE, Symbol::kSize, symbol,
                            Context::SYMBOL_FUNCTION_INDEX)
+#define ALLOCATE_SIMD128_MAP(TYPE, Type, type, lane_count, lane_type) \
+  ALLOCATE_PRIMITIVE_MAP(SIMD128_VALUE_TYPE, Type::kSize, type,       \
+                         Context::TYPE##_FUNCTION_INDEX)
+    SIMD128_TYPES(ALLOCATE_SIMD128_MAP)
+#undef ALLOCATE_SIMD128_MAP
     ALLOCATE_MAP(FOREIGN_TYPE, Foreign::kSize, foreign)
 
     ALLOCATE_PRIMITIVE_MAP(ODDBALL_TYPE, Oddball::kSize, boolean,
                            Context::BOOLEAN_FUNCTION_INDEX);
     ALLOCATE_MAP(ODDBALL_TYPE, Oddball::kSize, uninitialized);
     ALLOCATE_MAP(ODDBALL_TYPE, Oddball::kSize, arguments_marker);
     ALLOCATE_MAP(ODDBALL_TYPE, Oddball::kSize, no_interceptor_result_sentinel);
     ALLOCATE_MAP(ODDBALL_TYPE, Oddball::kSize, exception);
     ALLOCATE_MAP(ODDBALL_TYPE, Oddball::kSize, termination_exception);
     ALLOCATE_MAP(ODDBALL_TYPE, Oddball::kSize, optimized_out);
@@ skipping 145 matching lines @@
   {
     AllocationResult allocation = AllocateRaw(size, space, kDoubleUnaligned);
     if (!allocation.To(&result)) return allocation;
   }
 
   Map* map = mode == MUTABLE ? mutable_heap_number_map() : heap_number_map();
   HeapObject::cast(result)->set_map_no_write_barrier(map);
   return result;
 }
 
+#define SIMD_ALLOCATE_DEFINITION(TYPE, Type, type, lane_count, lane_type) \
+  AllocationResult Heap::Allocate##Type(lane_type lanes[lane_count],      \
+                                        PretenureFlag pretenure) {        \
+    int size = Type::kSize;                                               \
+    STATIC_ASSERT(Type::kSize <= kMaxRegularHeapObjectSize);              \
+                                                                          \
+    AllocationSpace space = SelectSpace(pretenure);                       \
+                                                                          \
+    HeapObject* result = nullptr;                                         \
+    {                                                                     \
+      AllocationResult allocation =                                       \
+          AllocateRaw(size, space, kSimd128Unaligned);                    \
+      if (!allocation.To(&result)) return allocation;                     \
+    }                                                                     \
+                                                                          \
+    result->set_map_no_write_barrier(type##_map());                       \
+    Type* instance = Type::cast(result);                                  \
+    for (int i = 0; i < lane_count; i++) {                                \
+      instance->set_lane(i, lanes[i]);                                    \
+    }                                                                     \
+    return result;                                                        \
+  }
+SIMD128_TYPES(SIMD_ALLOCATE_DEFINITION)
+#undef SIMD_ALLOCATE_DEFINITION
+
+
 AllocationResult Heap::AllocateCell(Object* value) {
   int size = Cell::kSize;
   STATIC_ASSERT(Cell::kSize <= kMaxRegularHeapObjectSize);
 
   HeapObject* result = nullptr;
   {
     AllocationResult allocation = AllocateRaw(size, OLD_SPACE);
     if (!allocation.To(&result)) return allocation;
   }
   result->set_map_no_write_barrier(cell_map());
@@ skipping 4065 matching lines @@
 }
 
 
 // static
 int Heap::GetStaticVisitorIdForMap(Map* map) {
   return StaticVisitorBase::GetVisitorId(map);
 }
 
 }  // namespace internal
 }  // namespace v8