diff options
Diffstat (limited to 'techlibs/gowin/synth_gowin.cc')
| -rw-r--r-- | techlibs/gowin/synth_gowin.cc | 53 |
1 files changed, 44 insertions, 9 deletions
diff --git a/techlibs/gowin/synth_gowin.cc b/techlibs/gowin/synth_gowin.cc index ac3dbfb29..6cf058f29 100644 --- a/techlibs/gowin/synth_gowin.cc +++ b/techlibs/gowin/synth_gowin.cc @@ -64,6 +64,15 @@ struct SynthGowinPass : public ScriptPass log(" -retime\n"); log(" run 'abc' with -dff option\n"); log("\n"); + log(" -nowidelut\n"); + log(" do not use muxes to implement LUTs larger than LUT4s\n"); + log("\n"); + log(" -noiopads\n"); + log(" do not emit IOB at top level ports\n"); + log("\n"); + log(" -abc9\n"); + log(" use new ABC9 flow (EXPERIMENTAL)\n"); + log("\n"); log("\n"); log("The following commands are executed by this synthesis command:\n"); help_script(); @@ -71,7 +80,7 @@ struct SynthGowinPass : public ScriptPass } string top_opt, vout_file; - bool retime, nobram, nodram, flatten, nodffe; + bool retime, nobram, nodram, flatten, nodffe, nowidelut, abc9, noiopads; void clear_flags() YS_OVERRIDE { @@ -82,6 +91,9 @@ struct SynthGowinPass : public ScriptPass nobram = false; nodffe = false; nodram = false; + nowidelut = false; + abc9 = false; + noiopads = false; } void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE @@ -128,6 +140,18 @@ struct SynthGowinPass : public ScriptPass flatten = false; continue; } + if (args[argidx] == "-nowidelut") { + nowidelut = true; + continue; + } + if (args[argidx] == "-abc9") { + abc9 = true; + continue; + } + if (args[argidx] == "-noiopads") { + noiopads = true; + continue; + } break; } extra_args(args, argidx, design); @@ -163,8 +187,8 @@ struct SynthGowinPass : public ScriptPass { run("synth -run coarse"); } - - if (!nobram && check_label("bram", "(skip if -nobram)")) + + if (!nobram && check_label("bram", "(skip if -nobram)")) { run("memory_bram -rules +/gowin/bram.txt"); run("techmap -map +/gowin/brams_map.v -map +/gowin/cells_sim.v"); @@ -186,12 +210,13 @@ struct SynthGowinPass : public ScriptPass run("techmap -map +/techmap.v"); if (retime || help_mode) run("abc -dff", "(only if -retime)"); + run("splitnets"); } if (check_label("map_ffs")) { run("dffsr2dff"); - run("dff2dffs"); + run("dff2dffs -match-init"); run("opt_clean"); if (!nodffe) run("dff2dffe -direct-match $_DFF_* -direct-match $__DFFS_*"); @@ -202,16 +227,26 @@ struct SynthGowinPass : public ScriptPass if (check_label("map_luts")) { - run("abc -lut 4"); + if (nowidelut && abc9) { + run("abc9 -lut 4"); + } else if (nowidelut && !abc9) { + run("abc -lut 4"); + } else if (!nowidelut && abc9) { + run("abc9 -lut 4:8"); + } else if (!nowidelut && !abc9) { + run("abc -lut 4:8"); + } run("clean"); } if (check_label("map_cells")) { run("techmap -map +/gowin/cells_map.v"); - run("hilomap -hicell VCC V -locell GND G"); - run("iopadmap -bits -inpad IBUF O:I -outpad OBUF I:O", "(unless -noiopads)"); - run("dffinit -ff DFF Q INIT"); + run("setundef -undriven -params -zero"); + run("hilomap -singleton -hicell VCC V -locell GND G"); + if (!noiopads || help_mode) + run("iopadmap -bits -inpad IBUF O:I -outpad OBUF I:O " + "-toutpad TBUF OEN:I:O -tinoutpad IOBUF OEN:O:I:IO", "(unless -noiopads)"); run("clean"); } @@ -226,7 +261,7 @@ struct SynthGowinPass : public ScriptPass if (check_label("vout")) { if (!vout_file.empty() || help_mode) - run(stringf("write_verilog -nodec -attr2comment -defparam -renameprefix gen %s", + run(stringf("write_verilog -decimal -attr2comment -defparam -renameprefix gen %s", help_mode ? "<file-name>" : vout_file.c_str())); } } |