Convert SIMD wasm ops to runtime function calls

src/compiler/wasm-compiler.h

 // Copyright 2015 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_COMPILER_WASM_COMPILER_H_
 #define V8_COMPILER_WASM_COMPILER_H_
 
 // Clients of this interface shouldn't depend on lots of compiler internals.
 // Do not include anything from src/compiler here!
 #include "src/wasm/wasm-opcodes.h"
@@ skipping 115 matching lines @@
   Node* CallIndirect(uint32_t index, Node** args,
                      wasm::WasmCodePosition position);
   void BuildJSToWasmWrapper(Handle<Code> wasm_code, wasm::FunctionSig* sig);
   void BuildWasmToJSWrapper(Handle<JSFunction> function,
                             wasm::FunctionSig* sig);
 
   Node* ToJS(Node* node, Node* context, wasm::LocalType type);
   Node* FromJS(Node* node, Node* context, wasm::LocalType type);
   Node* Invert(Node* node);
   Node* FunctionTable();
+  Node* BuildChangeInt32ToTagged(Node* value);
+  Node* BuildChangeTaggedToInt32(Node* value);
+  Node* BuildChangeFloat64ToTagged(Node* value);
+  Node* BuildChangeTaggedToFloat64(Node* value);
 
   //-----------------------------------------------------------------------
   // Operations that concern the linear memory.
   //-----------------------------------------------------------------------
   Node* MemSize(uint32_t offset);
   Node* LoadGlobal(uint32_t index);
   Node* StoreGlobal(uint32_t index, Node* val);
   Node* LoadMem(wasm::LocalType type, MachineType memtype, Node* index,
                 uint32_t offset, wasm::WasmCodePosition position);
   Node* StoreMem(MachineType type, Node* index, uint32_t offset, Node* val,
                  wasm::WasmCodePosition position);
 
   static void PrintDebugName(Node* node);
 
   Node* Control() { return *control_; }
   Node* Effect() { return *effect_; }
 
   void set_module(wasm::ModuleEnv* module) { this->module_ = module; }
 
   void set_control_ptr(Node** control) { this->control_ = control; }
 
   void set_effect_ptr(Node** effect) { this->effect_ = effect; }
 
   wasm::FunctionSig* GetFunctionSignature() { return function_signature_; }
 
   void Int64LoweringForTesting();
 
   void SetSourcePosition(Node* node, wasm::WasmCodePosition position);
 
+  //-----------------------------------------------------------------------
+  // SIMD operations.
+  //-----------------------------------------------------------------------
+  Node* DefaultS128Value();
+  void set_is_simd_function(bool simd) { this->is_simd_function_ = simd; }

[titzer, 2016/05/19 09:43:27]

I think this should be "has simd ops" and should be hidden in the private
implementation details (i.e. only set when internally a SIMD operation is
detected).

[gdeepti, 2016/07/01 22:24:48]

Changed to HasSimdOps, and is now only set internally in the compiler. 

+  bool is_simd_function() { return is_simd_function_; }
+
  private:
   static const int kDefaultBufferSize = 16;
   friend class WasmTrapHelper;
 
   Zone* zone_;
   JSGraph* jsgraph_;
   wasm::ModuleEnv* module_;
   Node* mem_buffer_;
   Node* mem_size_;
   Node* function_table_;
   Node** control_;
   Node** effect_;
   Node** cur_buffer_;
   size_t cur_bufsize_;
   Node* def_buffer_[kDefaultBufferSize];
 
   WasmTrapHelper* trap_;
   wasm::FunctionSig* function_signature_;
+  bool is_simd_function_;
   SetOncePointer<const Operator> allocate_heap_number_operator_;
 
   compiler::SourcePositionTable* source_position_table_ = nullptr;
 
   // Internal helper methods.
   JSGraph* jsgraph() { return jsgraph_; }
   Graph* graph();
 
   Node* String(const char* string);
   Node* MemBuffer(uint32_t offset);
@@ skipping 77 matching lines @@
   Node* BuildI64DivS(Node* left, Node* right, wasm::WasmCodePosition position);
   Node* BuildI64RemS(Node* left, Node* right, wasm::WasmCodePosition position);
   Node* BuildI64DivU(Node* left, Node* right, wasm::WasmCodePosition position);
   Node* BuildI64RemU(Node* left, Node* right, wasm::WasmCodePosition position);
   Node* BuildDiv64Call(Node* left, Node* right, ExternalReference ref,
                        MachineType result_type, int trap_zero,
                        wasm::WasmCodePosition position);
 
   Node* BuildJavaScriptToNumber(Node* node, Node* context, Node* effect,
                                 Node* control);
-  Node* BuildChangeInt32ToTagged(Node* value);
-  Node* BuildChangeFloat64ToTagged(Node* value);
-  Node* BuildChangeTaggedToFloat64(Node* value);
 
   Node* BuildChangeInt32ToSmi(Node* value);
   Node* BuildChangeSmiToInt32(Node* value);
   Node* BuildChangeSmiToFloat64(Node* value);
   Node* BuildTestNotSmi(Node* value);
   Node* BuildSmiShiftBitsConstant();
 
   Node* BuildAllocateHeapNumberWithValue(Node* value, Node* control);
   Node* BuildLoadHeapNumberValue(Node* value, Node* control);
   Node* BuildHeapNumberValueIndexConstant();
@@ skipping 14 matching lines @@
     Node** buf = Buffer(new_count);
     if (buf != buffer) memcpy(buf, buffer, old_count * sizeof(Node*));
     return buf;
   }
 };
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_WASM_COMPILER_H_