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-rw-r--r--techlibs/xilinx/synth_xilinx.cc6
1 files changed, 3 insertions, 3 deletions
diff --git a/techlibs/xilinx/synth_xilinx.cc b/techlibs/xilinx/synth_xilinx.cc
index f2a9ae982..2f4c503f2 100644
--- a/techlibs/xilinx/synth_xilinx.cc
+++ b/techlibs/xilinx/synth_xilinx.cc
@@ -111,7 +111,7 @@ struct SynthXilinxPass : public ScriptPass
log(" run 'abc9' with -dff option\n");
log("\n");
log(" -retime\n");
- log(" run 'abc' with -dff option\n");
+ log(" run 'abc' with '-dff -D 1' options\n");
log("\n");
log(" -abc9\n");
log(" use new ABC9 flow (EXPERIMENTAL)\n");
@@ -564,9 +564,9 @@ struct SynthXilinxPass : public ScriptPass
}
else {
if (nowidelut)
- run("abc -luts 2:2,3,6:5" + string(retime ? " -dff" : ""));
+ run("abc -luts 2:2,3,6:5" + string(retime ? " -dff -D 1" : ""));
else
- run("abc -luts 2:2,3,6:5,10,20" + string(retime ? " -dff" : ""));
+ run("abc -luts 2:2,3,6:5,10,20" + string(retime ? " -dff -D 1" : ""));
}
run("clean");