Answers Database

M1.4 LOGIBLOX: MAP may convert 5K Logiblox adder CY_MUX's to FG muxes and leaves buffers in.


Record #3831

Product Family:  Software

Product Line:  FPGA Implementation

Problem Title:
M1.4 LOGIBLOX: MAP may convert 5K Logiblox adder CY_MUX's to FG muxes
and leaves buffers in.



Problem Description:
Keywords: logiblox, adder, carry, cy_mux, fg, xc5200, 5k

Urgency: standard

General Description:
MAP may convert XC5200 Logiblox adder CY_MUX's to FG muxes.

There is currently a known problem with Map converting
CY_MUX's to FG muxes.  This occurs after the CY_MUX used for
carry chain initialization has been optimized away.



Solution 1:

A solution is currently under investigation.

As a workaround, you may use a similar component from the
Xilinx Unified Library instead.



End of Record #3831