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write_cxxrtl: add support for $slice and $concat cells.

This commit is contained in:
whitequark 2020-04-05 07:46:42 +00:00
parent 01e6850bd3
commit 9534b51277
1 changed files with 16 additions and 1 deletions
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17
backends/cxxrtl/cxxrtl.cc
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@ -189,7 +189,8 @@ static bool is_binary_cell(RTLIL::IdString type)
static bool is_elidable_cell(RTLIL::IdString type)
{
return is_unary_cell(type) || is_binary_cell(type) || type == ID($mux);
return is_unary_cell(type) || is_binary_cell(type) || type.in(
ID($mux), ID($concat), ID($slice));
}
static bool is_ff_cell(RTLIL::IdString type)
@ -672,6 +673,20 @@ struct CxxrtlWorker {
f << " : ";
dump_sigspec_rhs(cell->getPort(ID(A)));
f << ")";
// Concats
} else if (cell->type == ID($concat)) {
dump_sigspec_rhs(cell->getPort(ID(B)));
f << ".concat(";
dump_sigspec_rhs(cell->getPort(ID(A)));
f << ").val()";
// Slices
} else if (cell->type == ID($slice)) {
dump_sigspec_rhs(cell->getPort(ID(A)));
f << ".slice<";
f << cell->getParam(ID(OFFSET)).as_int() + cell->getParam(ID(Y_WIDTH)).as_int() - 1;
f << ",";
f << cell->getParam(ID(OFFSET)).as_int();
f << ">().val()";
} else {
log_assert(false);
}