Fixed invalid mpy instruction being generated
Fixed byte order of 32 bit values when emitted to the elf file
Support for addv/subv to modify 16 bit registers directly
Support for move 8bit immediate
Support for tst0 instruction
Support for directly adding p0 to an ab register after mpy
Support for 8 bit immediate multiply
Support for modr instruction
Support for post increase/decrement for loads and stores
Use copy instruction for a to a register moves
