[PATCH] Fix implementation for Thumb ADR instruction

[Tim Northover]

Hi Mihail,

> I think that my template method will actually work for all offsets. Let's
> take a case study: ldr r0, [r1, #-4]

I mean the one in the AsmParser, not in the decoder, the decoder one
is versatile but unnecessary if we stick to pre-encoded MCOperands
(where sane).

The problem is more "ldr r0, [r1, #-4096]" for the LDRi12 instruction.
This should not be allowed, but it looks like your "Min" would get set
to -4096 because a 13-bit 2s complement integer can accept that
immediate.

> Regarding the shifting of the immediate for ADR's PC-relative operand, I can
> of course have it shifted in the MCOperand if you insist.

I think that would be better.

Cheers.

Tim.