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machxo2: Hardcode a rule for emitting U_/D_ or G_ prefixes in ASCII output.

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This commit is contained in:
William D. Jones 2021-02-22 22:33:47 -05:00
parent b1f25d4b33
commit ec239c8c35
1 changed files with 17 additions and 2 deletions
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19
machxo2/bitstream.cc
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@ -71,9 +71,24 @@ static std::string get_trellis_wirename(Context *ctx, Location loc, WireId wire)
name.find("JINCK") != std::string::npos); name.find("JINCK") != std::string::npos);
}; };
if (prefix2 == "G_" || prefix2 == "L_" || prefix2 == "R_" || prefix2 == "U_" || prefix2 == "D_" || if (prefix2 == "G_" || prefix2 == "L_" || prefix2 == "R_" || prefix7 == "BRANCH_")
prefix7 == "BRANCH_")
return basename; return basename;
if (prefix2 == "U_" || prefix2 == "D_") {
// We needded to keep U_ and D_ prefixes to generate the routing
// graph connections properly, but in truth they are not relevant
// outside of the center row of tiles as far as the database is
// concerned. So convert U_/D_ prefixes back to G_ if not in the
// center row.
// FIXME: This is hardcoded to 1200HC coordinates for now. Perhaps
// add a center row/col field to chipdb?
if (loc.y == 6)
return basename;
else
return "G_" + basename.substr(2);
}
if (loc == wire.location) { if (loc == wire.location) {
// TODO: JINCK is not currently handled by this. // TODO: JINCK is not currently handled by this.
if (is_pio_wire(basename)) { if (is_pio_wire(basename)) {