Architecture Wizard, XtremeDSP Slice - Why does the Multiplier Architecture Wizard set the A_IN port width to the wrong size when targeting Virtex-5?
The problem is that the A_IN bus size is wrong. It should be 25, as selected in the GUI, but instead it is set to 30.
This is a known bug in the XtremeDSP Slice Multiply Architecture Wizard output.
For a list of alternative solutions to using the Architecture Wizard, see (Xilinx Answer 30101).