reduced register set runtime incorrectly calculates modulo with __umodsi3

[iguryanov]

Hi,

I was running some tests with em_mini 16registers target, took libgcc.a from 2021.03 release candidate.

At least em_mini has issues with calculating unsinged int modulo with __umodsi3().
for unsigned int X bigger than 0xa000_0000 "x % 10" is always equals x.

I tested only em_mini, only unsigned integers and only 10 on right side.
And to make test faster I checked only for results bigger than 9, not for absolute correctness.

Regards,
Igor.

[claziss]

Thanks for this one. The mask used in udivmodsi4 was wrong. Fixed by this commit:

foss-for-synopsys-dwc-arc-processors/gcc@55a92c9