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Merge pull request #1423 from YosysHQ/eddie/techmap_replace_wire

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RFC: techmap to recognise wires named "_TECHMAP_REPLACE_.<suffix>"
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Eddie Hung 2019-10-02 19:40:39 -07:00 • committed by GitHub
commit 278533fe59
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14
passes/techmap/techmap.cc
View file

@ -257,6 +257,12 @@ struct TechmapWorker
w->add_strpool_attribute(ID(src), extra_src_attrs); w->add_strpool_attribute(ID(src), extra_src_attrs);
} }
design->select(module, w); design->select(module, w);
if (it.second->name.begins_with("\\_TECHMAP_REPLACE_.")) {
IdString replace_name = stringf("%s%s", orig_cell_name.c_str(), it.second->name.c_str() + strlen("\\_TECHMAP_REPLACE_"));
Wire *replace_w = module->addWire(replace_name, it.second);
module->connect(replace_w, w);
}
} }
SigMap tpl_sigmap(tpl); SigMap tpl_sigmap(tpl);
@ -378,6 +384,8 @@ struct TechmapWorker
if (techmap_replace_cell) if (techmap_replace_cell)
c_name = orig_cell_name; c_name = orig_cell_name;
else if (it.second->name.begins_with("\\_TECHMAP_REPLACE_."))
c_name = stringf("%s%s", orig_cell_name.c_str(), c_name.c_str() + strlen("\\_TECHMAP_REPLACE_"));
else else
apply_prefix(cell->name, c_name); apply_prefix(cell->name, c_name);
@ -1198,6 +1206,12 @@ struct TechmapPass : public Pass {
log("\n"); log("\n");
log("A cell with the name _TECHMAP_REPLACE_ in the map file will inherit the name\n"); log("A cell with the name _TECHMAP_REPLACE_ in the map file will inherit the name\n");
log("and attributes of the cell that is being replaced.\n"); log("and attributes of the cell that is being replaced.\n");
log("A cell with a name of the form `_TECHMAP_REPLACE_.<suffix>` in the map file will\n");
log("be named thus but with the `_TECHMAP_REPLACE_' prefix substituted with the name\n");
log("of the cell being replaced.\n");
log("Similarly, a wire named in the form `_TECHMAP_REPLACE_.<suffix>` will cause a\n");
log("new wire alias to be created and named as above but with the `_TECHMAP_REPLACE_'\n");
log("prefix also substituted.\n");
log("\n"); log("\n");
log("See 'help extract' for a pass that does the opposite thing.\n"); log("See 'help extract' for a pass that does the opposite thing.\n");
log("\n"); log("\n");

18
tests/techmap/techmap_replace.ys Normal file
View file

@ -0,0 +1,18 @@
read_verilog <<EOT
module sub(input i, output o, input j);
foobar _TECHMAP_REPLACE_(i, o, j);
wire _TECHMAP_REPLACE_.asdf = i ;
barfoo _TECHMAP_REPLACE_.blah (i, o, j);
endmodule
EOT
design -stash techmap
read_verilog <<EOT
module top(input i, output o);
sub s0(i, o);
endmodule
EOT
techmap -map %techmap
select -assert-any w:s0.asdf
select -assert-any c:s0.blah