[Flow] Add comments to clarify the limitations

2021-10-30 19:17:11 -07:00 · 2021-10-30 19:17:11 -07:00 · 0d14aa4cb8
parent 7f999d03c6
commit 0d14aa4cb8
1 changed files with 1 additions and 0 deletions
--- a/openfpga_flow/misc/ys_tmpl_yosys_vpr_bram_flow.ys
+++ b/openfpga_flow/misc/ys_tmpl_yosys_vpr_bram_flow.ys
@ -45,6 +45,7 @@ share
 opt -nodffe -nosdff
 fsm
 # Run a quick follow-up optimization to sweep out unused nets/signals
+# FIXME: In Yosys v0.10, when options '-nodffe' and '-nosdff' is on, some dual-port ram cannot be inferred correctly
 opt -fast #-nodffe -nosdff
 # Optimize any memory cells by merging share-able ports and collecting all the ports belonging to memorcy cells  
 memory -nomap