In ISE Design Suite 13.x and 14.x, when customizing the FIR v6.2 block, if the user has a coefficient vector that is not negative-symmetric and if they choose Implementation -> Coeff Structure=negative-symmetric, an error appears.
However, in ISE Design Suite 13.2 and later, this error does not pop up anymore. I am incorrectly allowed to save my module that has non negative-symmetric coefficients.
Other coefficient DRCs are still present.
If the CORE Generator software is run in debug mode (-d option), the following message is generated:
DEBUG [ipmodel] - Parameter Coefficient_Structure was detected to be invalid while updating Coefficient Vector. Issue: Coefficients provided do not match
coefficient structure 'Negative Symmetric'
However, the pop-up window is no longer present for FIR v6.2.
NOTE: The DRC pop-up is displayed for the FIFO v6.1 IP.