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-rw-r--r--techlibs/ecp5/synth_ecp5.cc5
1 files changed, 4 insertions, 1 deletions
diff --git a/techlibs/ecp5/synth_ecp5.cc b/techlibs/ecp5/synth_ecp5.cc
index 3b4185930..8e243f7a6 100644
--- a/techlibs/ecp5/synth_ecp5.cc
+++ b/techlibs/ecp5/synth_ecp5.cc
@@ -2,7 +2,7 @@
* yosys -- Yosys Open SYnthesis Suite
*
* Copyright (C) 2012 Clifford Wolf <clifford@clifford.at>
- * Copyright (C) 2018 Clifford Wolf <dave@ds0.me>
+ * Copyright (C) 2018 David Shah <dave@ds0.me>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@@ -207,6 +207,9 @@ struct SynthEcp5Pass : public ScriptPass
if (!design->full_selection())
log_cmd_error("This command only operates on fully selected designs!\n");
+ if (abc9 && retime)
+ log_cmd_error("-retime option not currently compatible with -abc9!\n");
+
log_header(design, "Executing SYNTH_ECP5 pass.\n");
log_push();