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Add support for SHREGMAP+$mux, also fine tune $pmux

This commit is contained in:
Eddie Hung 2019-03-22 23:22:19 -07:00
parent 0895093c7c
commit 098bd5758f
1 changed files with 24 additions and 1 deletions
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25
passes/techmap/shregmap.cc
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@ -111,6 +111,14 @@ struct ShregmapTechXilinx7 : ShregmapTech
sigbit_to_shiftx_offset[bit] = std::make_tuple(cell, j++, 0);
log_assert(j == cell->getParam("\\A_WIDTH").as_int());
}
else if (cell->type == "$mux") {
int j = 0;
for (auto bit : cell->getPort("\\A"))
sigbit_to_shiftx_offset[bit] = std::make_tuple(cell, 0, j++);
j = 0;
for (auto bit : sigmap(cell->getPort("\\B")))
sigbit_to_shiftx_offset[bit] = std::make_tuple(cell, 1, j++);
}
else if (cell->type == "$pmux") {
int width = cell->getParam("\\WIDTH").as_int();
int j = 0;
@ -140,6 +148,8 @@ struct ShregmapTechXilinx7 : ShregmapTech
return;
if (cell->type == "$pmux" && (port == "\\A" || port == "\\B"))
return;
if (cell->type == "$mux" && (port == "\\A" || port == "\\B"))
return;
}
sigbit_to_shiftx_offset.erase(it);
}
@ -203,6 +213,10 @@ struct ShregmapTechXilinx7 : ShregmapTech
if (GetSize(taps) != shiftx->getParam("\\S_WIDTH").as_int() + 1)
return false;
}
else if (shiftx->type == "$mux") {
if (GetSize(taps) != 2)
return false;
}
else log_abort();
return true;
@ -243,14 +257,23 @@ struct ShregmapTechXilinx7 : ShregmapTech
RTLIL::SigSpec b_port;
for (int i = shiftx->getParam("\\S_WIDTH").as_int(); i > 0; i--)
b_port.append(RTLIL::Const(i, clog2taps));
for (int i = (1 << clog2taps); i > shiftx->getParam("\\S_WIDTH").as_int(); i--)
b_port.append(RTLIL::Const(RTLIL::Sx, clog2taps));
l_wire = cell->module->addWire(NEW_ID, clog2taps);
cell->module->addPmux(NEW_ID, RTLIL::Const(0, clog2taps), b_port, shiftx->getPort("\\S"), l_wire);
RTLIL::SigSpec s_wire = cell->module->addWire(NEW_ID, (1 << clog2taps));
cell->module->connect(s_wire.extract(0, shiftx->getParam("\\S_WIDTH").as_int()), shiftx->getPort("\\S"));
cell->module->addPmux(NEW_ID, RTLIL::Const(0, clog2taps), b_port, s_wire, l_wire);
int group = std::get<2>(it->second);
RTLIL::SigSpec y_wire = shiftx->getPort("\\Y");
q_wire = y_wire[group];
y_wire[group] = cell->module->addWire(NEW_ID);
shiftx->setPort("\\Y", y_wire);
}
else if (shiftx->type == "$mux") {
l_wire = shiftx->getPort("\\S");
q_wire = shiftx->getPort("\\Y");
shiftx->setPort("\\Y", cell->module->addWire(NEW_ID));
}
else log_abort();
newcell->setPort("\\Q", q_wire);