Core: Refactor core to use only one function for execution.

Core: Cleaned up comment to be more readable.

Citra: Changed loop to be more readable.

src/core/core.h

@@ -19,8 +19,15 @@ extern ARM_Interface*   g_sys_core;     ///< ARM11 system (OS) core
 /// Start the core
 void Start();
 
-/// Run the core CPU loop
-void RunLoop();
+/**
+ * Run the core CPU loop
+ * This function loops for 100 instructions in the CPU before trying to update hardware. This is a
+ * little bit faster than SingleStep, and should be pretty much equivalent. The number of
+ * instructions chosen is fairly arbitrary, however a large number will more drastically affect the
+ * frequency of GSP interrupts and likely break things. The point of this is to just loop in the CPU
+ * for more than 1 instruction to reduce overhead and make it a little bit faster...
+ */
+void RunLoop(int tight_loop=100);
 
 /// Step the CPU one instruction
 void SingleStep();