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bbox_derive: Write help

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Martin Povišer 2024-05-21 14:57:37 +02:00
parent 88af059fad
commit 5c929a91c2
1 changed files with 22 additions and 0 deletions
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22
passes/cmds/bbox_derive.cc
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@ -29,6 +29,28 @@ struct BboxDerivePass : Pass {
log("\n");
log(" bbox_derive [-base <base_module>] [-naming_attr <attr>] [selection]\n");
log("\n");
log("As part of the assembly of the design hierarchy done by the 'hierarchy' command,\n");
log("specializations of parametric modules are derived on demand: for each choice of\n");
log("parameter values appearing in the design, a copy of the parametric module is\n");
log("derived which is specialized to that choice.\n");
log("\n");
log("This derivation process ignores blackboxes and whiteboxes. To supplement, this\n");
log("'bbox_derive' command can be used to request the derivation of modules based on\n");
log("blackbox or whitebox instances appearing in the design, which is desirable in\n");
log("certain use cases. Only the selected cells are considered as the instances that\n");
log("steer the derivation process.\n");
log("\n");
log(" -base <base_module>\n");
log(" instead of deriving the module that directly corresponds to each blackbox\n");
log(" instance, derive a specialization of <base_module> (this option applies\n");
log(" to all selected blackbox cells)\n");
log("\n");
log(" -naming_attr <attr>\n");
log(" once a specialization is derived, use the value of the module attribute\n");
log(" <attr> for a name which should be used for the derived module (this\n");
log(" replaces the internal Yosys naming scheme in which the names of derived\n");
log(" modules start with '$paramod$')\n");
log("\n");
}
void execute(std::vector<std::string> args, RTLIL::Design *d) override
{