diff options
Diffstat (limited to 'techlibs/gowin/synth_gowin.cc')
| -rw-r--r-- | techlibs/gowin/synth_gowin.cc | 133 |
1 files changed, 114 insertions, 19 deletions
diff --git a/techlibs/gowin/synth_gowin.cc b/techlibs/gowin/synth_gowin.cc index 44dec265d..c5b41b503 100644 --- a/techlibs/gowin/synth_gowin.cc +++ b/techlibs/gowin/synth_gowin.cc @@ -29,7 +29,7 @@ struct SynthGowinPass : public ScriptPass { SynthGowinPass() : ScriptPass("synth_gowin", "synthesis for Gowin FPGAs") { } - virtual void help() YS_OVERRIDE + void help() YS_OVERRIDE { // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| log("\n"); @@ -49,8 +49,29 @@ struct SynthGowinPass : public ScriptPass log(" from label is synonymous to 'begin', and empty to label is\n"); log(" synonymous to the end of the command list.\n"); log("\n"); + log(" -nodffe\n"); + log(" do not use flipflops with CE in output netlist\n"); + log("\n"); + log(" -nobram\n"); + log(" do not use BRAM cells in output netlist\n"); + log("\n"); + log(" -nolutram\n"); + log(" do not use distributed RAM cells in output netlist\n"); + log("\n"); + log(" -noflatten\n"); + log(" do not flatten design before synthesis\n"); + log("\n"); log(" -retime\n"); - log(" run 'abc' with -dff option\n"); + log(" run 'abc' with '-dff -D 1' options\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"); @@ -59,16 +80,23 @@ struct SynthGowinPass : public ScriptPass } string top_opt, vout_file; - bool retime; + bool retime, nobram, nolutram, flatten, nodffe, nowidelut, abc9, noiopads; - virtual void clear_flags() YS_OVERRIDE + void clear_flags() YS_OVERRIDE { top_opt = "-auto-top"; vout_file = ""; retime = false; + flatten = true; + nobram = false; + nodffe = false; + nolutram = false; + nowidelut = false; + abc9 = false; + noiopads = false; } - virtual void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE + void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE { string run_from, run_to; clear_flags(); @@ -96,12 +124,40 @@ struct SynthGowinPass : public ScriptPass retime = true; continue; } + if (args[argidx] == "-nobram") { + nobram = true; + continue; + } + if (args[argidx] == "-nolutram" || /*deprecated*/args[argidx] == "-nodram") { + nolutram = true; + continue; + } + if (args[argidx] == "-nodffe") { + nodffe = true; + continue; + } + if (args[argidx] == "-noflatten") { + 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); if (!design->full_selection()) - log_cmd_error("This comannd only operates on fully selected designs!\n"); + log_cmd_error("This command only operates on fully selected designs!\n"); log_header(design, "Executing SYNTH_GOWIN pass.\n"); log_push(); @@ -111,7 +167,7 @@ struct SynthGowinPass : public ScriptPass log_pop(); } - virtual void script() YS_OVERRIDE + void script() YS_OVERRIDE { if (check_label("begin")) { @@ -119,7 +175,7 @@ struct SynthGowinPass : public ScriptPass run(stringf("hierarchy -check %s", help_mode ? "-top <top>" : top_opt.c_str())); } - if (check_label("flatten")) + if (flatten && check_label("flatten", "(unless -noflatten)")) { run("proc"); run("flatten"); @@ -132,31 +188,70 @@ struct SynthGowinPass : public ScriptPass run("synth -run coarse"); } - if (check_label("fine")) + if (!nobram && check_label("map_bram", "(skip if -nobram)")) + { + run("memory_bram -rules +/gowin/brams.txt"); + run("techmap -map +/gowin/brams_map.v -map +/gowin/cells_sim.v"); + } + + if (!nolutram && check_label("map_lutram", "(skip if -nolutram)")) + { + run("memory_bram -rules +/gowin/lutrams.txt"); + run("techmap -map +/gowin/lutrams_map.v"); + run("determine_init"); + } + + if (check_label("map_ffram")) { run("opt -fast -mux_undef -undriven -fine"); run("memory_map"); run("opt -undriven -fine"); - run("techmap"); - run("clean -purge"); - run("splitnets -ports"); - run("setundef -undriven -zero"); + } + + if (check_label("map_gates")) + { + run("techmap -map +/techmap.v -map +/gowin/arith_map.v"); + run("techmap -map +/techmap.v"); if (retime || help_mode) - run("abc -dff", "(only if -retime)"); + run("abc -dff -D 1", "(only if -retime)"); + run("splitnets"); + } + + if (check_label("map_ffs")) + { + run("dffsr2dff"); + run("dff2dffs -match-init"); + run("opt_clean"); + if (!nodffe) + run("dff2dffe -direct-match $_DFF_* -direct-match $__DFFS_*"); + run("techmap -map +/gowin/cells_map.v"); + run("opt_expr -mux_undef"); + run("simplemap"); } 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 -inpad IBUF O:I -outpad OBUF I:O"); - run("clean -purge"); + 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"); } if (check_label("check")) @@ -169,7 +264,7 @@ 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())); } } |