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🐛 Place inputs and outputs in the same order during hexagonalization #342

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merged 2 commits into from
Nov 30, 2023
Merged

🐛 Place inputs and outputs in the same order during hexagonalization #342

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08e543b
place inputs first
simon1hofmann Nov 28, 2023
2024d61
place outputs last
simon1hofmann Nov 28, 2023
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35 changes: 29 additions & 6 deletions include/fiction/algorithms/physical_design/hexagonalization.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -165,6 +165,16 @@ template <typename HexLyt, typename CartLyt>
// calculate offset
const auto offset = detail::get_offset<HexLyt, CartLyt>(lyt, layout_width, layout_height);

// inputs
lyt.foreach_pi(
[&lyt, &hex_layout, &offset, &layout_height](const auto& gate)
{
const auto old_coord = lyt.get_tile(gate);
tile<CartLyt> hex{detail::to_hex<CartLyt, HexLyt>(old_coord, layout_height)};
hex.x -= offset;
hex_layout.create_pi(lyt.get_name(lyt.get_node(old_coord)), hex);
});

// iterate through cartesian layout diagonally
for (uint64_t k = 0; k < layout_width + layout_height - 1; ++k)
{
Expand All @@ -189,7 +199,7 @@ template <typename HexLyt, typename CartLyt>

if (lyt.is_pi(node))
{
hex_layout.create_pi(lyt.get_name(lyt.get_node(old_coord)), hex);
continue;
}

if (const auto signals = lyt.incoming_data_flow(old_coord); signals.size() == 1)
Expand All @@ -202,11 +212,7 @@ template <typename HexLyt, typename CartLyt>

const auto hex_signal = hex_layout.make_signal(hex_layout.get_node(hex_tile));

if (lyt.is_po(node))
{
hex_layout.create_po(hex_signal, lyt.get_name(lyt.get_node(old_coord)), hex);
}
else if (lyt.is_wire(node))
if (!lyt.is_po(node) and lyt.is_wire(node))
{
hex_layout.create_buf(hex_signal, hex);
}
Expand Down Expand Up @@ -264,6 +270,23 @@ template <typename HexLyt, typename CartLyt>
}
}
}

// outputs
lyt.foreach_po(
[&lyt, &hex_layout, &offset, &layout_height](const auto& gate)
{
const auto old_coord = lyt.get_tile(lyt.get_node(gate));
const auto signal = lyt.incoming_data_flow(old_coord)[0];

tile<CartLyt> hex{detail::to_hex<CartLyt, HexLyt>(old_coord, layout_height)};
auto hex_tile = detail::to_hex<CartLyt, HexLyt>(signal, layout_height);
hex.x -= offset;
hex_tile.x -= offset;

const auto hex_signal = hex_layout.make_signal(hex_layout.get_node(hex_tile));
hex_layout.create_po(hex_signal, lyt.get_name(lyt.get_node(old_coord)), hex);
});

// calculate bounding box
const auto bounding_box = bounding_box_2d(hex_layout);
const auto layout_max = bounding_box.get_max();
Expand Down
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