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ice40: Use memory_libmap pass.

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This commit is contained in:
Marcelina Kościelnicka 2022-02-27 09:29:26 +01:00
parent 3b2f95953c
commit d7dc2313b9
9 changed files with 285 additions and 506 deletions
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27
techlibs/ice40/synth_ice40.cc
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@ -90,6 +90,9 @@ struct SynthIce40Pass : public ScriptPass
log(" -nobram\n");
log(" do not use SB_RAM40_4K* cells in output netlist\n");
log("\n");
log(" -spram\n");
log(" enable automatic inference of SB_SPRAM256KA\n");
log("\n");
log(" -dsp\n");
log(" use iCE40 UltraPlus DSP cells for large arithmetic\n");
log("\n");
@ -116,7 +119,7 @@ struct SynthIce40Pass : public ScriptPass
}
string top_opt, blif_file, edif_file, json_file, device_opt;
bool nocarry, nodffe, nobram, dsp, flatten, retime, noabc, abc2, vpr, abc9, dff, flowmap;
bool nocarry, nodffe, nobram, spram, dsp, flatten, retime, noabc, abc2, vpr, abc9, dff, flowmap;
int min_ce_use;
void clear_flags() override
@ -129,6 +132,7 @@ struct SynthIce40Pass : public ScriptPass
nodffe = false;
min_ce_use = -1;
nobram = false;
spram = false;
dsp = false;
flatten = true;
retime = false;
@ -204,6 +208,10 @@ struct SynthIce40Pass : public ScriptPass
nobram = true;
continue;
}
if (args[argidx] == "-spram") {
spram = true;
continue;
}
if (args[argidx] == "-dsp") {
dsp = true;
continue;
@ -322,19 +330,24 @@ struct SynthIce40Pass : public ScriptPass
run("opt_clean");
}
if (!nobram && check_label("map_bram", "(skip if -nobram)"))
if (check_label("map_ram"))
{
run("memory_bram -rules +/ice40/brams.txt");
run("techmap -map +/ice40/brams_map.v");
std::string args = "";
if (!spram)
args += " -no-auto-huge";
if (nobram)
args += " -no-auto-block";
if (help_mode)
args += " [-no-auto-huge] [-no-auto-block]";
run("memory_libmap -lib +/ice40/brams.txt -lib +/ice40/spram.txt" + args, "(-no-auto-huge unless -spram, -no-auto-block if -nobram)");
run("techmap -map +/ice40/brams_map.v -map +/ice40/spram_map.v");
run("ice40_braminit");
}
if (check_label("map_ffram"))
{
run("opt -fast -mux_undef -undriven -fine");
run("memory_map -iattr -attr !ram_block -attr !rom_block -attr logic_block "
"-attr syn_ramstyle=auto -attr syn_ramstyle=registers "
"-attr syn_romstyle=auto -attr syn_romstyle=logic");
run("memory_map");
run("opt -undriven -fine");
}