diff options
Diffstat (limited to 'passes/pmgen/xilinx_srl.cc')
| -rw-r--r-- | passes/pmgen/xilinx_srl.cc | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/passes/pmgen/xilinx_srl.cc b/passes/pmgen/xilinx_srl.cc index bd4dc59ab..862b44bb0 100644 --- a/passes/pmgen/xilinx_srl.cc +++ b/passes/pmgen/xilinx_srl.cc @@ -34,6 +34,10 @@ void reduce_chain(xilinx_srl_pm &pm) { auto &st = pm.st_reduce; auto &ud = pm.ud_reduce; + auto param_def = [&ud](Cell *cell, IdString param) { + auto def = ud.default_params.at(std::make_pair(cell->type,param)); + return cell->parameters.at(param, def); + }; log("Found chain of length %d (%s):\n", GetSize(ud.longest_chain), log_id(st.first->type)); @@ -42,14 +46,20 @@ void reduce_chain(xilinx_srl_pm &pm) SigSpec initval; for (auto cell : ud.longest_chain) { log_debug(" %s\n", log_id(cell)); - SigBit Q = cell->getPort(ID(Q)); - log_assert(Q.wire); - auto it = Q.wire->attributes.find(ID(init)); - if (it != Q.wire->attributes.end()) { - initval.append(it->second[Q.offset]); + if (cell->type.in(ID($_DFF_N_), ID($_DFF_P_), ID($_DFFE_NN_), ID($_DFFE_NP_), ID($_DFFE_PN_), ID($_DFFE_PP_))) { + SigBit Q = cell->getPort(ID(Q)); + log_assert(Q.wire); + auto it = Q.wire->attributes.find(ID(init)); + if (it != Q.wire->attributes.end()) { + initval.append(it->second[Q.offset]); + } + else + initval.append(State::Sx); } + else if (cell->type.in(ID(FDRE), ID(FDRE_1))) + initval.append(param_def(cell, ID(INIT))); else - initval.append(State::Sx); + log_abort(); if (cell != last_cell) pm.autoremove(cell); } @@ -66,6 +76,8 @@ void reduce_chain(xilinx_srl_pm &pm) c->setParam(ID(CLKPOL), 1); else if (c->type.in(ID($_DFF_N_), ID($DFFE_NN_), ID($_DFFE_NP_), ID(FDRE_1))) c->setParam(ID(CLKPOL), 0); + else if (c->type.in(ID(FDRE))) + c->setParam(ID(CLKPOL), param_def(c, ID(IS_C_INVERTED)).as_bool() ? 0 : 1); else log_abort(); if (c->type.in(ID($_DFFE_NP_), ID($_DFFE_PP_))) @@ -119,6 +131,11 @@ struct XilinxSrlPass : public Pass { do { auto pm = xilinx_srl_pm(module, module->selected_cells()); pm.ud_reduce.minlen = minlen; + // TODO: How to get these automatically? + pm.ud_reduce.default_params[std::make_pair(ID(FDRE),ID(INIT))] = State::S0; + pm.ud_reduce.default_params[std::make_pair(ID(FDRE),ID(IS_C_INVERTED))] = State::S0; + pm.ud_reduce.default_params[std::make_pair(ID(FDRE),ID(IS_D_INVERTED))] = State::S0; + pm.ud_reduce.default_params[std::make_pair(ID(FDRE),ID(IS_R_INVERTED))] = State::S0; did_something = pm.run_reduce(reduce_chain); } while (did_something); } |