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-rw-r--r--techlibs/xilinx/synth_xilinx.cc2
1 files changed, 2 insertions, 0 deletions
diff --git a/techlibs/xilinx/synth_xilinx.cc b/techlibs/xilinx/synth_xilinx.cc
index e9a3b53a0..ec7768ffe 100644
--- a/techlibs/xilinx/synth_xilinx.cc
+++ b/techlibs/xilinx/synth_xilinx.cc
@@ -261,6 +261,8 @@ struct SynthXilinxPass : public ScriptPass
if (vpr && !nocarry && !help_mode)
run("techmap -map +/xilinx/arith_map.v -D _EXPLICIT_CARRY");
+ else if (abc == "abc9" && !nocarry && !help_mode)
+ run("techmap -map +/xilinx/arith_map.v -D _CLB_CARRY", "(skip if '-nocarry')");
else if (!nocarry || help_mode)
run("techmap -map +/xilinx/arith_map.v", "(skip if '-nocarry')");