LLE JIT: Added an ASM dispatcher. Should help pave the way for future optimisation.
In the command processor when FIFO_READ_POINTER is reading Is better return fifo.CPWritePointer instead fifo.CPReadPointer.
In this way it prevents wrong fifo.CPReadWriteDistance in the future. That should fix RE0 Issue 2846 and others «Warning: GFX FIFO: Unknown Opcode (0x4d)» in dual core mode.
Core/DSPCore: Implement jit emitters for lris and mrr.
Also add the mask for ADPCM predictor, like r6480 does.
Tested 64 bit linux/windows. At least compiles for 32 bit windows, but
with these binaries most of my guest software fails with
DSPLLE(interpreted and jit) when it gets to do actual work.