optimized bit ops for GP bits

com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/RBaseObject.java

 /*
- * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -48,16 +48,16 @@ abstract class RBaseObject implements RTypedValue {
 
     @Override
     public final boolean isS4() {
-        return (getGPBits() & S4_MASK) == S4_MASK;
+        return (getTypedValueInfo() & S4_MASK_SHIFTED) != 0;
     }
 
     @Override
     public final void setS4() {
-        setGPBits(getGPBits() | S4_MASK);
+        setTypedValueInfo(getTypedValueInfo() | S4_MASK_SHIFTED);
     }
 
     @Override
     public final void unsetS4() {
-        setGPBits(getGPBits() & ~S4_MASK);
+        setTypedValueInfo(getTypedValueInfo() & ~S4_MASK_SHIFTED);
     }
 }

com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/RTypedValue.java

@@ -27,6 +27,8 @@ public interface RTypedValue extends RTruffleObject {
     int GP_BITS_MASK_SHIFT = 8;
     int GP_BITS_MASK = 0xFFFF << GP_BITS_MASK_SHIFT;
 
+    int S4_MASK_SHIFTED = 1 << (4 + GP_BITS_MASK_SHIFT);
+
     RType getRType();
 
     int getTypedValueInfo();
@@ -42,14 +44,14 @@ public interface RTypedValue extends RTruffleObject {
     }
 
     default boolean isS4() {
-        return (getGPBits() & S4_MASK) == S4_MASK;
+        return (getTypedValueInfo() & S4_MASK_SHIFTED) != 0;
     }
 
     default void setS4() {
-        setGPBits(getGPBits() | S4_MASK);
+        setTypedValueInfo(getTypedValueInfo() | S4_MASK_SHIFTED);
     }
 
     default void unsetS4() {
-        setGPBits(getGPBits() & ~S4_MASK);
+        setTypedValueInfo(getTypedValueInfo() & ~S4_MASK_SHIFTED);
     }
 }