diff options
Diffstat (limited to 'techlibs/gowin/synth_gowin.cc')
| -rw-r--r-- | techlibs/gowin/synth_gowin.cc | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/techlibs/gowin/synth_gowin.cc b/techlibs/gowin/synth_gowin.cc index 3c1426414..6cf058f29 100644 --- a/techlibs/gowin/synth_gowin.cc +++ b/techlibs/gowin/synth_gowin.cc @@ -67,6 +67,9 @@ struct SynthGowinPass : public ScriptPass 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"); @@ -77,7 +80,7 @@ struct SynthGowinPass : public ScriptPass } string top_opt, vout_file; - bool retime, nobram, nodram, flatten, nodffe, nowidelut, abc9; + bool retime, nobram, nodram, flatten, nodffe, nowidelut, abc9, noiopads; void clear_flags() YS_OVERRIDE { @@ -90,6 +93,7 @@ struct SynthGowinPass : public ScriptPass nodram = false; nowidelut = false; abc9 = false; + noiopads = false; } void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE @@ -144,6 +148,10 @@ struct SynthGowinPass : public ScriptPass abc9 = true; continue; } + if (args[argidx] == "-noiopads") { + noiopads = true; + continue; + } break; } extra_args(args, argidx, design); @@ -208,7 +216,7 @@ struct SynthGowinPass : public ScriptPass 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_*"); @@ -236,8 +244,9 @@ struct SynthGowinPass : public ScriptPass run("techmap -map +/gowin/cells_map.v"); run("setundef -undriven -params -zero"); run("hilomap -singleton -hicell VCC V -locell GND G"); - run("iopadmap -bits -inpad IBUF O:I -outpad OBUF I:O " - "-toutpad TBUF OEN:I:O -tinoutpad IOBUF OEN:O:I:IO", "(unless -noiopads)"); + 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"); } |