MIPS: ES6 symbols: Implement Symbol intrinsic and basic functionality

src/mips/stub-cache-mips.cc

Index: src/mips/stub-cache-mips.cc
diff --git a/src/mips/stub-cache-mips.cc b/src/mips/stub-cache-mips.cc
index 6247510afb30a52a059cdf95e8d8dafc368c5238..caf7fa7321271396ccafc4450f3c650504318910 100644
--- a/src/mips/stub-cache-mips.cc
+++ b/src/mips/stub-cache-mips.cc
@@ -2431,6 +2431,12 @@ void CallStubCompiler::CompileHandlerFrontend(Handle<Object> object,
           a0, holder, a3, a1, t0, name, &miss);
       break;
 
+    case SYMBOL_CHECK:
+      // Check that the object is a symbol.
+      __ GetObjectType(a1, a1, a3);
+      __ Branch(&miss, ne, a3, Operand(SYMBOL_TYPE));
+      break;
+
     case NUMBER_CHECK: {
       Label fast;
       // Check that the object is a smi or a heap number.