With the addition of checks to ensure that operands have a strict ordering
it has become tricky to manage the order in the way I originally intended.
This patch linearizes the ordering which simplifies the implementation but
requires an order that is arbitrary in places. Here are some examples:
- uimm4 < uimm5 < uimm6
- simm4 < uimm4 < simm5 < uimm5
- uimm5 < uimm5_plus1 (1..32) < uimm5_plus32 (32..63) < uimm6 The term 'superset' starts to break down here since the *_plus* classes are not true supersets of uimm5 (but they are still subsets of uimm6).
- uimm5 < uimm5_64, and uimm5 < vsplat_uimm5 This is entirely arbitrary. We need an ordering and what we pick is unimportant since only one is possible for a given mnemonic.
Depends on D17291