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| author | Claire Xen <claire@clairexen.net> | 2021-10-21 13:00:53 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-10-21 13:00:53 +0200 |
| commit | 51d42cc917d66917439955616bc5a3842e5d6301 (patch) | |
| tree | e293a349c65f26c69cfe6f735301b90b8ae0f5d9 | |
| parent | e64456f92025c26f8b66e77901f78eca726d856a (diff) | |
| parent | 90b440f870a8ac2c91b3f716f38a4f538cad2549 (diff) | |
| download | yosys-51d42cc917d66917439955616bc5a3842e5d6301.tar.gz yosys-51d42cc917d66917439955616bc5a3842e5d6301.tar.bz2 yosys-51d42cc917d66917439955616bc5a3842e5d6301.zip | |
Merge pull request #3057 from YosysHQ/claire/verific_latches
Initial Verific impoter support for {PRIM,WIDE_OPER}_DLATCH{,RS}
| -rw-r--r-- | frontends/verific/verific.cc | 65 |
1 files changed, 61 insertions, 4 deletions
diff --git a/frontends/verific/verific.cc b/frontends/verific/verific.cc index a265dc8b4..18fba9b76 100644 --- a/frontends/verific/verific.cc +++ b/frontends/verific/verific.cc @@ -441,7 +441,17 @@ bool VerificImporter::import_netlist_instance_gates(Instance *inst, RTLIL::IdStr return true; } - // FIXME: PRIM_DLATCH + if (inst->Type() == PRIM_DLATCH) + { + if (inst->GetAsyncCond()->IsGnd()) { + module->addDlatch(inst_name, net_map_at(inst->GetControl()), net_map_at(inst->GetInput()), net_map_at(inst->GetOutput())); + } else { + RTLIL::SigSpec sig_set = module->And(NEW_ID, net_map_at(inst->GetAsyncCond()), net_map_at(inst->GetAsyncVal())); + RTLIL::SigSpec sig_clr = module->And(NEW_ID, net_map_at(inst->GetAsyncCond()), module->Not(NEW_ID, net_map_at(inst->GetAsyncVal()))); + module->addDlatchsr(inst_name, net_map_at(inst->GetControl()), sig_set, sig_clr, net_map_at(inst->GetInput()), net_map_at(inst->GetOutput())); + } + return true; + } return false; } @@ -568,7 +578,18 @@ bool VerificImporter::import_netlist_instance_cells(Instance *inst, RTLIL::IdStr return true; } - // FIXME: PRIM_DLATCH + if (inst->Type() == PRIM_DLATCH) + { + if (inst->GetAsyncCond()->IsGnd()) { + cell = module->addDlatch(inst_name, net_map_at(inst->GetControl()), net_map_at(inst->GetInput()), net_map_at(inst->GetOutput())); + } else { + RTLIL::SigSpec sig_set = module->And(NEW_ID, net_map_at(inst->GetAsyncCond()), net_map_at(inst->GetAsyncVal())); + RTLIL::SigSpec sig_clr = module->And(NEW_ID, net_map_at(inst->GetAsyncCond()), module->Not(NEW_ID, net_map_at(inst->GetAsyncVal()))); + cell = module->addDlatchsr(inst_name, net_map_at(inst->GetControl()), sig_set, sig_clr, net_map_at(inst->GetInput()), net_map_at(inst->GetOutput())); + } + import_attributes(cell->attributes, inst); + return true; + } #define IN operatorInput(inst) #define IN1 operatorInput1(inst) @@ -842,7 +863,19 @@ bool VerificImporter::import_netlist_instance_cells(Instance *inst, RTLIL::IdStr return true; } - // FIXME: OPER_WIDE_DLATCHSR + if (inst->Type() == OPER_WIDE_DLATCHRS) + { + RTLIL::SigSpec sig_set = operatorInport(inst, "set"); + RTLIL::SigSpec sig_reset = operatorInport(inst, "reset"); + + if (sig_set.is_fully_const() && !sig_set.as_bool() && sig_reset.is_fully_const() && !sig_reset.as_bool()) + cell = module->addDlatch(inst_name, net_map_at(inst->GetControl()), IN, OUT); + else + cell = module->addDlatchsr(inst_name, net_map_at(inst->GetControl()), sig_set, sig_reset, IN, OUT); + import_attributes(cell->attributes, inst); + + return true; + } if (inst->Type() == OPER_WIDE_DFF) { @@ -872,7 +905,31 @@ bool VerificImporter::import_netlist_instance_cells(Instance *inst, RTLIL::IdStr return true; } - // FIXME: OPER_WIDE_DLATCH + if (inst->Type() == OPER_WIDE_DLATCH) + { + RTLIL::SigSpec sig_d = IN; + RTLIL::SigSpec sig_q = OUT; + RTLIL::SigSpec sig_adata = IN1; + RTLIL::SigSpec sig_acond = IN2; + + if (sig_acond.is_fully_const() && !sig_acond.as_bool()) { + cell = module->addDlatch(inst_name, net_map_at(inst->GetControl()), sig_d, sig_q); + import_attributes(cell->attributes, inst); + } else { + int offset = 0, width = 0; + for (offset = 0; offset < GetSize(sig_acond); offset += width) { + for (width = 1; offset+width < GetSize(sig_acond); width++) + if (sig_acond[offset] != sig_acond[offset+width]) break; + RTLIL::SigSpec sig_set = module->Mux(NEW_ID, RTLIL::SigSpec(0, width), sig_adata.extract(offset, width), sig_acond[offset]); + RTLIL::SigSpec sig_clr = module->Mux(NEW_ID, RTLIL::SigSpec(0, width), module->Not(NEW_ID, sig_adata.extract(offset, width)), sig_acond[offset]); + cell = module->addDlatchsr(inst_name, net_map_at(inst->GetControl()), sig_set, sig_clr, + sig_d.extract(offset, width), sig_q.extract(offset, width)); + import_attributes(cell->attributes, inst); + } + } + + return true; + } #undef IN #undef IN1 |