Update fpu.s to add coverage for negative denormalized numbers (!267) · Merge requests · OpenHW Group / backup-20241120 / cvw

Created by: Dygore

I added a test for negative denormalized numbers in the FPU.s

This increased the coverage of fclassify from 85% to 100%

It's similar to a previous PR I did, I just added a test for the sign bit being negative and denorm to be true.

Update fpu.s to add coverage for negative denormalized numbers