Convert SIMD wasm ops to runtime function calls

src/wasm/wasm-opcodes.cc

Index: src/wasm/wasm-opcodes.cc
diff --git a/src/wasm/wasm-opcodes.cc b/src/wasm/wasm-opcodes.cc
index a08fa8dbe6bc458f6ea0993881ed0f20d6bb9491..7d4e82f79e6b9b48f830fd8cb81f6b0f2112d2eb 100644
--- a/src/wasm/wasm-opcodes.cc
+++ b/src/wasm/wasm-opcodes.cc
@@ -79,6 +79,20 @@ static void InitSigTable() {
 #undef SET_SIG_TABLE
 }
 
+bool WasmOpcodes::IsSimd(WasmOpcode opcode) {
+  switch (opcode) {
+#define IS_SIMD_OPCODE(name, opcode, sig) \
+  case kExpr##name:                       \
+    if (kExpr##name == opcode) {          \
+      return true;                        \
+    }
+    FOREACH_SIMD_OPCODE(IS_SIMD_OPCODE)
+#undef IS_SIMD_OPCODE
+    default:
+      return false;
+  }
+}
+
 class SigTable {
  public:
   SigTable() {