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-rw-r--r--techlibs/xilinx/synth_xilinx.cc6
1 files changed, 5 insertions, 1 deletions
diff --git a/techlibs/xilinx/synth_xilinx.cc b/techlibs/xilinx/synth_xilinx.cc
index 97464ffe4..e316c268e 100644
--- a/techlibs/xilinx/synth_xilinx.cc
+++ b/techlibs/xilinx/synth_xilinx.cc
@@ -277,7 +277,11 @@ struct SynthXilinxPass : public ScriptPass
if (!nomux || help_mode)
run("techmap -map +/xilinx/cells_map.v");
- run("techmap");
+ if (!vpr || help_mode)
+ run("techmap -map +/techmap.v -map +/xilinx/arith_map.v");
+ else
+ run("techmap -map +/techmap.v +/xilinx/arith_map.v -D _EXPLICIT_CARRY");
+
run("opt -fast");
}