diff options
Diffstat (limited to 'ice40')
| -rw-r--r-- | ice40/arch.h | 2 | ||||
| -rw-r--r-- | ice40/arch_place.cc | 31 | ||||
| -rw-r--r-- | ice40/chains.cc | 2 |
3 files changed, 18 insertions, 17 deletions
diff --git a/ice40/arch.h b/ice40/arch.h index 561d75c3..1d91a9ae 100644 --- a/ice40/arch.h +++ b/ice40/arch.h @@ -802,7 +802,7 @@ struct Arch : BaseCtx bool isBelLocationValid(BelId bel) const; // Helper function for above - bool logicCellsCompatible(const std::vector<const CellInfo *> &cells) const; + bool logicCellsCompatible(const CellInfo** it, const size_t size) const; // ------------------------------------------------- // Assign architecure-specific arguments to nets and cells, which must be diff --git a/ice40/arch_place.cc b/ice40/arch_place.cc index 2e2b9556..c69fd34f 100644 --- a/ice40/arch_place.cc +++ b/ice40/arch_place.cc @@ -23,15 +23,17 @@ #include "nextpnr.h" #include "util.h" +#include <boost/range/iterator_range.hpp> + NEXTPNR_NAMESPACE_BEGIN -bool Arch::logicCellsCompatible(const std::vector<const CellInfo *> &cells) const +bool Arch::logicCellsCompatible(const CellInfo** it, const size_t size) const { bool dffs_exist = false, dffs_neg = false; const NetInfo *cen = nullptr, *clk = nullptr, *sr = nullptr; int locals_count = 0; - for (auto cell : cells) { + for (auto cell : boost::make_iterator_range(it, it+size)) { NPNR_ASSERT(cell->belType == id_ICESTORM_LC); if (cell->lcInfo.dffEnable) { if (!dffs_exist) { @@ -71,16 +73,15 @@ bool Arch::logicCellsCompatible(const std::vector<const CellInfo *> &cells) cons bool Arch::isBelLocationValid(BelId bel) const { if (getBelType(bel) == id_ICESTORM_LC) { - static std::vector<const CellInfo *> bel_cells; - bel_cells.clear(); + std::array<const CellInfo *, 8> bel_cells; + size_t num_cells = 0; Loc bel_loc = getBelLocation(bel); for (auto bel_other : getBelsByTile(bel_loc.x, bel_loc.y)) { CellInfo *ci_other = getBoundBelCell(bel_other); - if (ci_other != nullptr) { - bel_cells.emplace_back(ci_other); - } + if (ci_other != nullptr) + bel_cells[num_cells++] = ci_other; } - return logicCellsCompatible(bel_cells); + return logicCellsCompatible(bel_cells.data(), num_cells); } else { CellInfo *ci = getBoundBelCell(bel); if (ci == nullptr) @@ -95,18 +96,18 @@ bool Arch::isValidBelForCell(CellInfo *cell, BelId bel) const if (cell->type == id_ICESTORM_LC) { NPNR_ASSERT(getBelType(bel) == id_ICESTORM_LC); - static std::vector<const CellInfo *> bel_cells; - bel_cells.clear(); + std::array<const CellInfo *, 8> bel_cells; + size_t num_cells = 0; + Loc bel_loc = getBelLocation(bel); for (auto bel_other : getBelsByTile(bel_loc.x, bel_loc.y)) { CellInfo *ci_other = getBoundBelCell(bel_other); - if (ci_other != nullptr && bel_other != bel) { - bel_cells.emplace_back(ci_other); - } + if (ci_other != nullptr && bel_other != bel) + bel_cells[num_cells++] = ci_other; } - bel_cells.emplace_back(cell); - return logicCellsCompatible(bel_cells); + bel_cells[num_cells++] = cell; + return logicCellsCompatible(bel_cells.data(), num_cells); } else if (cell->type == id_SB_IO) { // Do not allow placement of input SB_IOs on blocks where there a PLL is outputting to. diff --git a/ice40/chains.cc b/ice40/chains.cc index 8638a96c..bb20b60b 100644 --- a/ice40/chains.cc +++ b/ice40/chains.cc @@ -97,7 +97,7 @@ class ChainConstrainer } tile.push_back(cell); chains.back().cells.push_back(cell); - bool split_chain = (!ctx->logicCellsCompatible(tile)) || (int(chains.back().cells.size()) > max_length); + bool split_chain = (!ctx->logicCellsCompatible(tile.data(), tile.size())) || (int(chains.back().cells.size()) > max_length); if (split_chain) { CellInfo *passout = make_carry_pass_out(cell->ports.at(ctx->id("COUT"))); tile.pop_back(); |