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Map to $_FF_ instead of $_DFF_P_ to prevent recursion issues

This commit is contained in:
Eddie Hung 2019-06-15 09:34:48 -07:00
parent 7a3c403ba0
commit ac18a76beb
3 changed files with 15 additions and 15 deletions
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26
passes/techmap/abc9.cc
View File

@ -242,7 +242,7 @@ struct abc_output_filter
};
void abc9_module(RTLIL::Design *design, RTLIL::Module *current_module, std::string script_file, std::string exe_file,
bool cleanup, vector<int> lut_costs, bool dff_mode, std::string clk_str,
bool cleanup, vector<int> lut_costs, bool retime_mode, std::string clk_str,
bool /*keepff*/, std::string delay_target, std::string /*lutin_shared*/, bool fast_mode,
bool show_tempdir, std::string box_file, std::string lut_file,
std::string wire_delay)
@ -285,7 +285,7 @@ void abc9_module(RTLIL::Design *design, RTLIL::Module *current_module, std::stri
clk_sig = assign_map(RTLIL::SigSpec(module->wires_.at(RTLIL::escape_id(clk_str)), 0));
}
if (dff_mode && clk_sig.empty())
if (retime_mode && clk_sig.empty())
log_cmd_error("Clock domain %s not found.\n", clk_str.c_str());
std::string tempdir_name = "/tmp/yosys-abc-XXXXXX";
@ -359,7 +359,7 @@ void abc9_module(RTLIL::Design *design, RTLIL::Module *current_module, std::stri
fprintf(f, "%s\n", abc_script.c_str());
fclose(f);
if (dff_mode || !clk_str.empty())
if (retime_mode || !clk_str.empty())
{
if (clk_sig.size() == 0)
log("No%s clock domain found. Not extracting any FF cells.\n", clk_str.empty() ? "" : " matching");
@ -511,7 +511,7 @@ void abc9_module(RTLIL::Design *design, RTLIL::Module *current_module, std::stri
// Remove all AND, NOT, and ABC box instances
// in preparation for stitching mapped_mod in
// Short $_DFF_[NP]_ cells used by ABC (FIXME)
// Short $_FF_ cells used by ABC (FIXME)
dict<IdString, decltype(RTLIL::Cell::parameters)> erased_boxes;
for (auto it = module->cells_.begin(); it != module->cells_.end(); ) {
RTLIL::Cell* cell = it->second;
@ -519,7 +519,7 @@ void abc9_module(RTLIL::Design *design, RTLIL::Module *current_module, std::stri
it = module->cells_.erase(it);
continue;
}
else if (cell->type.in("$_DFF_N_", "$_DFF_P_")) {
else if (cell->type.in("$_FF_")) {
SigBit D = cell->getPort("\\D");
SigBit Q = cell->getPort("\\Q");
module->connect(Q, D);
@ -842,7 +842,7 @@ struct Abc9Pass : public Pass {
#endif
std::string script_file, clk_str, box_file, lut_file;
std::string delay_target, lutin_shared = "-S 1", wire_delay;
bool fast_mode = false, dff_mode = false, keepff = false, cleanup = true;
bool fast_mode = false, retime_mode = false, keepff = false, cleanup = true;
bool show_tempdir = false;
vector<int> lut_costs;
markgroups = false;
@ -933,13 +933,13 @@ struct Abc9Pass : public Pass {
fast_mode = true;
continue;
}
//if (arg == "-dff") {
// dff_mode = true;
// continue;
//}
if (arg == "-retime") {
retime_mode = true;
continue;
}
//if (arg == "-clk" && argidx+1 < args.size()) {
// clk_str = args[++argidx];
// dff_mode = true;
// retime_mode = true;
// continue;
//}
//if (arg == "-keepff") {
@ -1003,8 +1003,8 @@ struct Abc9Pass : public Pass {
}
}
if (!dff_mode || !clk_str.empty()) {
abc9_module(design, mod, script_file, exe_file, cleanup, lut_costs, dff_mode, clk_str, keepff,
if (!retime_mode || !clk_str.empty()) {
abc9_module(design, mod, script_file, exe_file, cleanup, lut_costs, retime_mode, clk_str, keepff,
delay_target, lutin_shared, fast_mode, show_tempdir,
box_file, lut_file, wire_delay);
continue;

2
techlibs/xilinx/ff_map.v
View File

@ -29,7 +29,7 @@ module \$_DFF_P_ (input D, C, output Q);
`else
wire Q_next;
\$__ABC_FDRE #(/*.INIT(|0)*/) _TECHMAP_REPLACE_ (.D(D), .Q(Q_next), .Q_past(Q), .C(C), .CE(1'b1), .R(1'b0));
\$_DFF_P_ abc_dff (.D(Q_next), .Q(Q), .C(C));
\$_FF_ abc_dff (.D(Q_next), .Q(Q));
`endif
endmodule

2
techlibs/xilinx/synth_xilinx.cc
View File

@ -277,7 +277,7 @@ struct SynthXilinxPass : public ScriptPass
if (check_label("map_cells")) {
run("techmap -map +/techmap.v -map +/xilinx/cells_map.v");
if (abc == "abc9")
run("techmap -max_iter 1 -D _ABC -map +/xilinx/ff_map.v");
run("techmap -D _ABC -map +/xilinx/ff_map.v t:$_DFF*");
run("clean");
}