Bug 720316 - Introduce GET_UINT8 and SET_UINT8 helpers for bytecode immediate examination/setting. r=luke

js/src/jsopcode.h

@@ -151,6 +151,18 @@ typedef enum JSOp {
  * Immediate operand getters, setters, and bounds.
  */
 
+static JS_ALWAYS_INLINE uint8_t
+GET_UINT8(jsbytecode *pc)
+{
+    return (uint8_t) pc[1];
+}
+
+static JS_ALWAYS_INLINE void
+SET_UINT8(jsbytecode *pc, uint8_t u)
+{
+    pc[1] = (jsbytecode) u;
+}
+
 /* Common uint16_t immediate format helpers. */
 #define UINT16_LEN              2
 #define UINT16_HI(i)            ((jsbytecode)((i) >> 8))