[llvm] [RISCV] Correctly Decode Unsigned Immediates with Ranges (PR #128584)

[Craig Topper via llvm-commits]

topperc wrote:

> it really helps if i write the test so it checks what i intended

I guess I only glanced at it and didn't think too hard about it.

https://github.com/llvm/llvm-project/pull/128584