Implements the ARM-mode variants of the CRC32 instructions introduced
within ARMv8. This is also one of the instruction cases where there is
UNPREDICTABLE behavior that is constrained (we must do one of the
options indicated by the reference manual).
In both documented cases of constrained unpredictable behavior, we treat
the instructions as unpredictable in order to allow library users to
hook the unpredictable exception to provide the intended behavior they
desire.
Replaces type aliases of raw integral types with the more type-safe Imm
template, like how the AArch64 frontend has been using it.
This makes the two frontends more consistent with one another.
Provides basic implementations of the barrier instruction introduced
within ARMv7. Currently these simply mirror the behavior of the AArch64
equivalents.
We already have RotateRight() in our common code, so we can remove this
function and replace it with it. We can also implement ArmExpandImm_C()
in terms of ArmExpandImm().
