stage2: create generic lowering fns for MI, RM, and MR encodings

This way I am hopeful they can be reused for every MIR lowering
function which follows a given encoding. Currently, support MI,
RM and MR encodings without SIB scaling.
2b5de9403dJakub Konka committed on 12/22/2021, 5:10:52 PMparent5156ccd
3 files changedLine totals unavailable