DSP48E2 Subtraction output wrong

[randolph.brandon@icloud.com]

I have configured a DSP48E2 slice (through the IP catalog) to perform a CONCAT - PCIN operation. In an Aldec simulation, I am getting the pcout and p outputs to be different. pcout gives the desired output whereas p is set to 0. I was wondering if anyone had any issues like this in using the DPS48E2 through the IP Catalog.

[nathanx]

Try not to customize the P output width, leave P output the default setting - full precision, see what happens. 

The P should be always identical to Pcout.