[8u] RFR 8248901: Signed immediate support in .../share/assembler.hpp is broken.

[Zhengyu Gu]

Hi Andrew,


On 6/23/21 7:15 AM, Andrew Haley wrote:
> 
> I'm not convinced we need this backport at all. It doesn't fix any bugs,
> and is only used for the one-liner is_uimm12 in the fix for 8247766. This
> patch is harmless, but we should at least think about the churn in 8u.
>

Yes, I backport this as a prerequisition of JDK-8247766.

Thanks,

-Zhengyu