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shregmap -tech xilinx_static to handle INIT

This commit is contained in:
Eddie Hung 2019-06-05 12:55:59 -07:00
parent 72eda94a66
commit 935df3569b
1 changed files with 32 additions and 22 deletions
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54
passes/techmap/shregmap.cc
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@ -30,7 +30,7 @@ struct ShregmapTech
virtual void non_chain_user(const SigBit &/*bit*/, const Cell* /*cell*/, IdString /*port*/) {}
virtual bool analyze_first(const Cell* /*first_cell*/, const SigMap &/*sigmap*/) { return true; }
virtual bool analyze(vector<int> &taps, const vector<SigBit> &qbits) = 0;
virtual Cell* fixup(Cell *cell, dict<int, SigBit> &taps) = 0;
virtual Cell* fixup(Cell *cell, const vector<int> &taps, const vector<SigBit> &qbits) = 0;
};
struct ShregmapOptions
@ -72,7 +72,7 @@ struct ShregmapTechGreenpak4 : ShregmapTech
return true;
}
virtual Cell* fixup(Cell *cell, dict<int, SigBit> &taps) override
virtual Cell* fixup(Cell *cell, const vector<int> &taps, const vector<SigBit> &qbits) override
{
auto D = cell->getPort("\\D");
auto C = cell->getPort("\\C");
@ -84,8 +84,8 @@ struct ShregmapTechGreenpak4 : ShregmapTech
int i = 0;
for (auto tap : taps) {
newcell->setPort(i ? "\\OUTB" : "\\OUTA", tap.second);
newcell->setParam(i ? "\\OUTB_TAP" : "\\OUTA_TAP", tap.first + 1);
newcell->setPort(i ? "\\OUTB" : "\\OUTA", qbits[tap]);
newcell->setParam(i ? "\\OUTB_TAP" : "\\OUTA_TAP", tap + 1);
i++;
}
@ -96,8 +96,21 @@ struct ShregmapTechGreenpak4 : ShregmapTech
struct ShregmapTechXilinx7Static : ShregmapTech
{
dict<SigBit, Cell*> sigbit_to_cell;
const ShregmapOptions &opts;
virtual void init(const Module* module, const SigMap &sigmap) override
{
for (const auto &i : module->cells_) {
auto cell = i.second;
if (!cell->type.in("\\FDRE", "\\FDRE_1","\\FDSE", "\\FDSE_1",
"\\FDCE", "\\FDCE_1", "\\FDPE", "\\FDPE_1"))
continue;
sigbit_to_cell[sigmap(cell->getPort("\\Q"))] = cell;
}
}
ShregmapTechXilinx7Static(const ShregmapOptions &opts) : opts(opts) {}
virtual bool analyze_first(const Cell* first_cell, const SigMap &sigmap) override
@ -154,15 +167,14 @@ struct ShregmapTechXilinx7Static : ShregmapTech
return GetSize(taps) == 1 && taps[0] >= opts.minlen-1;
}
virtual Cell* fixup(Cell *cell, dict<int, SigBit> &/*taps*/) override
virtual Cell* fixup(Cell *cell, const vector<int> &/*taps*/, const vector<SigBit> &qbits) override
{
auto newcell = cell->module->addCell(NEW_ID, "$__SHREG_");
newcell->set_src_attribute(cell->get_src_attribute());
newcell->setParam("\\DEPTH", cell->getParam("\\DEPTH"));
newcell->setParam("\\INIT", cell->getParam("\\INIT"));
if (cell->type.in("$__SHREG_DFF_N_", "$__SHREG_DFF_P_",
"$__SHREG_DFFE_NN_", "$__SHREG_DFFE_NP_", "$__SHREG_DFFE_PN_", "$__SHREG_DFFE_PP_")) {
"$__SHREG_DFFE_NN_", "$__SHREG_DFFE_NP_", "$__SHREG_DFFE_PN_", "$__SHREG_DFFE_PP_")) {
int param_clkpol = -1;
int param_enpol = 2;
if (cell->type == "$__SHREG_DFF_N_") param_clkpol = 0;
@ -176,6 +188,7 @@ struct ShregmapTechXilinx7Static : ShregmapTech
log_assert(param_clkpol >= 0);
newcell->setParam("\\CLKPOL", param_clkpol);
newcell->setParam("\\ENPOL", param_enpol);
newcell->setParam("\\INIT", cell->getParam("\\INIT"));
if (cell->hasPort("\\E"))
newcell->setPort("\\E", cell->getPort("\\E"));
@ -187,11 +200,12 @@ struct ShregmapTechXilinx7Static : ShregmapTech
param_clkpol = 0;
newcell->setParam("\\CLKPOL", param_clkpol);
newcell->setParam("\\ENPOL", 1);
newcell->setPort("\\E", cell->getPort("\\CE"));
}
else if (cell->type.in("$__SHREG_FDRE_1", "$__SHREG_FDSE_1", "$__SHREG_FDCE_1", "$__SHREG_FDPE_1")) {
newcell->setParam("\\CLKPOL", 0);
log_assert(cell->getParam("\\INIT").is_fully_undef());
SigSpec INIT;
for (auto q : qbits) {
Cell* reg = sigbit_to_cell.at(q);
INIT.append(SigBit(reg->getParam("\\INIT").as_bool()));
}
newcell->setPort("\\E", cell->getPort("\\CE"));
}
@ -314,15 +328,14 @@ struct ShregmapTechXilinx7Dynamic : ShregmapTechXilinx7Static
return true;
}
virtual Cell* fixup(Cell *cell, dict<int, SigBit> &taps) override
virtual Cell* fixup(Cell *cell, const vector<int> &taps, const vector<SigBit> &qbits) override
{
const auto &tap = *taps.begin();
auto bit = tap.second;
auto bit = qbits[taps.front()];
auto it = sigbit_to_shiftx_offset.find(bit);
log_assert(it != sigbit_to_shiftx_offset.end());
Cell* newcell = ShregmapTechXilinx7Static::fixup(cell, taps);
Cell* newcell = ShregmapTechXilinx7Static::fixup(cell, taps, qbits);
log_assert(newcell);
log_assert(newcell->type == "$__SHREG_");
newcell->type = "$__XILINX_SHREG_";
@ -493,7 +506,8 @@ struct ShregmapWorker
Cell *first_cell = chain[cursor];
IdString q_port = opts.ffcells.at(first_cell->type).second;
dict<int, SigBit> taps_dict;
vector<SigBit> qbits;
vector<int> taps;
if (opts.tech)
{
@ -502,9 +516,6 @@ struct ShregmapWorker
continue;
}
vector<SigBit> qbits;
vector<int> taps;
for (int i = 0; i < depth; i++)
{
Cell *cell = chain[cursor+i];
@ -529,7 +540,6 @@ struct ShregmapWorker
depth = 0;
for (auto tap : taps) {
taps_dict[tap] = qbits.at(tap);
log_assert(depth < tap+1);
depth = tap+1;
}
@ -600,7 +610,7 @@ struct ShregmapWorker
first_cell->setPort(q_port, last_cell->getPort(q_port));
first_cell->setParam("\\DEPTH", depth);
if (opts.tech != nullptr && opts.tech->fixup(first_cell, taps_dict))
if (opts.tech != nullptr && opts.tech->fixup(first_cell, taps, qbits))
remove_cells.insert(first_cell);
for (int i = 1; i < depth; i++)