Convert SIMD wasm ops to runtime function calls

src/wasm/wasm-opcodes.cc

 // 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.
 
 #include "src/wasm/wasm-opcodes.h"
 #include "src/messages.h"
 #include "src/signature.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 61 matching lines @@
 
 // Initialize the signature table.
 static void InitSigTable() {
 #define SET_SIG_TABLE(name, opcode, sig) \
   kSimpleExprSigTable[opcode] = static_cast<int>(kSigEnum_##sig) + 1;
   FOREACH_SIMPLE_OPCODE(SET_SIG_TABLE);
   FOREACH_ASMJS_COMPAT_OPCODE(SET_SIG_TABLE);
 #undef SET_SIG_TABLE
 }
 
+bool WasmOpcodes::IsSimd(WasmOpcode opcode) {

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

Could we make this into a range check instead of a switch?

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

Converted to a prefix check. 

+  switch (opcode) {
+#define IS_SIMD_OPCODE(name, opcode, sig) \
+  case kExpr##name:                       \
+    if (kExpr##name == opcode) {          \

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

The if here is redundant.

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

Function now removed. 

+      return true;                        \
+    }
+    FOREACH_SIMD_OPCODE(IS_SIMD_OPCODE)
+#undef IS_SIMD_OPCODE
+    default:
+      return false;
+  }
+}
+
 class SigTable {
  public:
   SigTable() {
     // TODO(ahaas): Move {InitSigTable} into the class.
     InitSigTable();
   }
   FunctionSig* Signature(WasmOpcode opcode) const {
     return const_cast<FunctionSig*>(
         kSimpleExprSigs[kSimpleExprSigTable[static_cast<byte>(opcode)]]);
   }
@@ skipping 23 matching lines @@
       return MessageTemplate::kNone;
   }
 }
 
 const char* WasmOpcodes::TrapReasonMessage(TrapReason reason) {
   return MessageTemplate::TemplateString(TrapReasonToMessageId(reason));
 }
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8