How can I locate inferred latches in Xilinx ISE?

Question

I have a big design in Xilinx ISE, there are 3 inferred latches which I would like to remove. Threre is no IP core or Microblaze and I have written all the code myself. I have problem locating the latches in my design. I have searched through report files but non helped me. Is there a method to quickly find them??? Thanks

Answer 1

You can search your synthesis report (*.syr file) for the XST warning 737:

WARNING:Xst:737 - Found <n>-bit latch for signal <name>.

<n> and <name> should be replaced by proper wildcards :)

The BEL report at the end of your synthesis report will list L* primitives (e.g. LD) in the flip-flop section. Normal flip-flops are named FD* (e.g. FDRCE).