diff options
Diffstat (limited to 'techlibs')
| -rw-r--r-- | techlibs/xilinx/synth_xilinx.cc | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/techlibs/xilinx/synth_xilinx.cc b/techlibs/xilinx/synth_xilinx.cc index bde95c638..a0e77021a 100644 --- a/techlibs/xilinx/synth_xilinx.cc +++ b/techlibs/xilinx/synth_xilinx.cc @@ -241,10 +241,10 @@ struct SynthXilinxPass : public ScriptPass run("dff2dffe"); run("opt -full"); - if (!vpr || help_mode) - run("techmap -map +/xilinx/arith_map.v"); - else + if (vpr && !nocarry && !help_mode) run("techmap -map +/xilinx/arith_map.v -D _EXPLICIT_CARRY"); + else if (!nocarry || help_mode) + run("techmap -map +/xilinx/arith_map.v", "(skip if '-nocarry')"); if (!nosrl || help_mode) { // shregmap operates on bit-level flops, not word-level, |