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machxo2: Initial support for carry chains (CCU2D)

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This commit is contained in:
Miodrag Milanovic 2023-03-31 13:36:36 +02:00 • committed by myrtle
parent 53c0a6b780
commit 6e12da3956
4 changed files with 127 additions and 5 deletions
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21
techlibs/machxo2/synth_machxo2.cc
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@ -69,6 +69,9 @@ struct SynthMachXO2Pass : public ScriptPass
log(" -noiopad\n");
log(" do not insert IO buffers\n");
log("\n");
log(" -ccu2\n");
log(" use CCU2 cells in output netlist\n");
log("\n");
log(" -vpr\n");
log(" generate an output netlist (and BLIF file) suitable for VPR\n");
log(" (this feature is experimental and incomplete)\n");
@ -80,7 +83,7 @@ struct SynthMachXO2Pass : public ScriptPass
}
string top_opt, blif_file, edif_file, json_file;
bool nobram, nolutram, flatten, vpr, noiopad;
bool ccu2, nobram, nolutram, flatten, vpr, noiopad;
void clear_flags() override
{
@ -88,6 +91,7 @@ struct SynthMachXO2Pass : public ScriptPass
blif_file = "";
edif_file = "";
json_file = "";
ccu2 = false;
nobram = false;
nolutram = false;
flatten = true;
@ -147,6 +151,10 @@ struct SynthMachXO2Pass : public ScriptPass
noiopad = true;
continue;
}
if (args[argidx] == "-ccu2") {
ccu2 = true;
continue;
}
if (args[argidx] == "-vpr") {
vpr = true;
continue;
@ -204,14 +212,17 @@ struct SynthMachXO2Pass : public ScriptPass
if (check_label("fine"))
{
run("opt -fast -mux_undef -undriven -fine");
run("memory_map");
run("opt -full");
run("techmap -map +/techmap.v");
run("opt -fast");
run("opt -undriven -fine");
}
if (check_label("map_ios", "(unless -noiopad)"))
if (check_label("map_gates", "(unless -noiopad)"))
{
if (!ccu2)
run("techmap");
else
run("techmap -map +/techmap.v -map +/machxo2/arith_map.v");
if (!noiopad || help_mode)
{
run("iopadmap -bits -outpad OB I:O -inpad IB O:I -toutpad OBZ ~T:I:O -tinoutpad BB ~T:O:I:B A:top", "(only if '-iopad')");