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xilinx/ecp5: disable abc9's "&mfs" optimisation

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Can sometimes fire an assertion, e.g. #1962
This commit is contained in:
Eddie Hung 2020-04-20 10:30:10 -07:00
parent ae115fa3aa
commit a998a4155d
3 changed files with 8 additions and 0 deletions
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2
techlibs/ecp5/synth_ecp5.cc
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@ -324,6 +324,8 @@ struct SynthEcp5Pass : public ScriptPass
if (abc9) {
run("read_verilog -icells -lib -specify +/abc9_model.v +/ecp5/abc9_model.v");
if (!help_mode && !active_design->scratchpad.count("abc9.nomfs"))
active_design->scratchpad_set_bool("abc9.nomfs", true);
if (nowidelut)
run("abc9 -maxlut 4 -W 200");
else

2
techlibs/xilinx/synth_xilinx.cc
View file

@ -613,6 +613,8 @@ struct SynthXilinxPass : public ScriptPass
if (family != "xc7")
log_warning("'synth_xilinx -abc9' not currently supported for the '%s' family, "
"will use timing for 'xc7' instead.\n", family.c_str());
if (!help_mode && !active_design->scratchpad.count("abc9.nomfs"))
active_design->scratchpad_set_bool("abc9.nomfs", true);
std::string techmap_args = "-map +/xilinx/abc9_map.v -max_iter 1";
if (dff_mode)
techmap_args += " -D DFF_MODE";