Problems when simulate the floating point functions Intel FPGA IP

Hi,

Thanks for your reply.

I am using the quartus prime pro 19.2 and the name of the IP core is Floating Point Functions Intel FPGA IP.

I attached the .ip file I am using and as well as the test bench and top-level design wrap.

I use a simple add_sub ip as an example, and the simulation results are shown in the below figure.

the result as sum is 0 all the time, I try different value of inputs. No idea on what is wrong with this IP core.

However, I try the max and min function in the same IP core category, which works perfect.

It would be of great help if you could help me to figure out what is wrong with the arithmetic calculation.

Thanks,