codegen: added mul instruction
codegen: added mul instruction

riginding/dora,riginding/dora,riginding/dora,riginding/dora,dinfuehr/dora,riginding/dora,riginding/dora,dinfuehr/dora,riginding/dora,dinfuehr/dora,dinfuehr/dora,dinfuehr/dora,dinfuehr/dora