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author | D. Shah <dave@ds0.me> | 2021-02-04 11:57:08 +0000 |
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committer | D. Shah <dave@ds0.me> | 2021-02-05 19:19:17 +0000 |
commit | 297cd026b9e87ce40ebf781cb86608b43cfbdd55 (patch) | |
tree | 5b95153782d178c424828b9a820b49eb7bc8821c /common/nextpnr.h | |
parent | ed8e3c83d97d775f912266c701ebf17e416cc50b (diff) | |
download | nextpnr-297cd026b9e87ce40ebf781cb86608b43cfbdd55.tar.gz nextpnr-297cd026b9e87ce40ebf781cb86608b43cfbdd55.tar.bz2 nextpnr-297cd026b9e87ce40ebf781cb86608b43cfbdd55.zip |
Add default implementation of bel bucket functions
Signed-off-by: D. Shah <dave@ds0.me>
Diffstat (limited to 'common/nextpnr.h')
-rw-r--r-- | common/nextpnr.h | 94 |
1 files changed, 89 insertions, 5 deletions
diff --git a/common/nextpnr.h b/common/nextpnr.h index a97deaa3..e950ad69 100644 --- a/common/nextpnr.h +++ b/common/nextpnr.h @@ -1012,6 +1012,7 @@ struct BaseCtx void attributesToArchInfo(); }; +namespace { // For several functions; such as bel/wire/pip attributes; the trivial implementation is to return an empty vector // But an arch might want to do something fancy with a custom range type that doesn't provide a constructor // So some cursed C++ is needed to return an empty object if possible; or error out if not; is needed @@ -1025,6 +1026,44 @@ template <typename Tc> typename std::enable_if<!std::is_constructible<Tc>::value "default constructor!"); } +// Provide a default implementation of bel bucket name if typedef'd to IdString +template <typename Tbbid> +typename std::enable_if<std::is_same<Tbbid, IdString>::value, IdString>::type bbid_to_name(Tbbid id) +{ + return id; +} +template <typename Tbbid> +typename std::enable_if<!std::is_same<Tbbid, IdString>::value, IdString>::type bbid_to_name(Tbbid id) +{ + NPNR_ASSERT_FALSE("getBelBucketName must be implemented when BelBucketId is a type other than IdString!"); +} +template <typename Tbbid> +typename std::enable_if<std::is_same<Tbbid, IdString>::value, BelBucketId>::type bbid_from_name(IdString name) +{ + return name; +} +template <typename Tbbid> +typename std::enable_if<!std::is_same<Tbbid, IdString>::value, BelBucketId>::type bbid_from_name(IdString name) +{ + NPNR_ASSERT_FALSE("getBelBucketByName must be implemented when BelBucketId is a type other than IdString!"); +} + +// For the cell type and bel type ranges; we want to return our stored vectors only if the type matches +template <typename Tret, typename Tc> +typename std::enable_if<std::is_same<Tret, Tc>::value, Tret>::type return_if_match(Tret r) +{ + return r; +} + +template <typename Tret, typename Tc> +typename std::enable_if<!std::is_same<Tret, Tc>::value, Tret>::type return_if_match(Tret r) +{ + NPNR_ASSERT_FALSE("default implementations of cell type and bel bucket range functions only available when the " + "respective range types are 'const std::vector&'"); +} + +} // namespace + template <typename R> struct ArchBase : BaseCtx { // -------------------------------------------------------------- @@ -1235,15 +1274,27 @@ template <typename R> struct ArchBase : BaseCtx // Placement validity checks virtual bool isValidBelForCellType(IdString cell_type, BelId bel) const { return cell_type == getBelType(bel); } - virtual IdString getBelBucketName(BelBucketId bucket) const = 0; - virtual BelBucketId getBelBucketByName(IdString name) const = 0; + virtual IdString getBelBucketName(BelBucketId bucket) const { return bbid_to_name<BelBucketId>(bucket); } + virtual BelBucketId getBelBucketByName(IdString name) const { return bbid_from_name<BelBucketId>(name); } virtual BelBucketId getBelBucketForBel(BelId bel) const { return getBelBucketForCellType(getBelType(bel)); }; virtual BelBucketId getBelBucketForCellType(IdString cell_type) const { return getBelBucketByName(cell_type); }; virtual bool isValidBelForCell(CellInfo *cell, BelId bel) const { return true; } virtual bool isBelLocationValid(BelId bel) const { return true; } - virtual typename R::CellTypeRange getCellTypes() const = 0; - virtual typename R::BelBucketRange getBelBuckets() const = 0; - virtual typename R::BucketBelRange getBelsInBucket(BelBucketId bucket) const = 0; + virtual typename R::CellTypeRange getCellTypes() const + { + NPNR_ASSERT(cell_types_initialised); + return return_if_match<const std::vector<IdString> &, typename R::CellTypeRange>(cell_types); + } + virtual typename R::BelBucketRange getBelBuckets() const + { + NPNR_ASSERT(bel_buckets_initialised); + return return_if_match<const std::vector<BelBucketId> &, typename R::BelBucketRange>(bel_buckets); + } + virtual typename R::BucketBelRange getBelsInBucket(BelBucketId bucket) const + { + NPNR_ASSERT(bel_buckets_initialised); + return return_if_match<const std::vector<BelId> &, typename R::BucketBelRange>(bucket_bels.at(bucket)); + } // Flow methods virtual bool pack() = 0; @@ -1258,6 +1309,39 @@ template <typename R> struct ArchBase : BaseCtx std::unordered_map<BelId, CellInfo *> base_bel2cell; std::unordered_map<WireId, NetInfo *> base_wire2net; std::unordered_map<PipId, NetInfo *> base_pip2net; + + // For the default cell/bel bucket implementations + std::vector<IdString> cell_types; + std::vector<BelBucketId> bel_buckets; + std::unordered_map<BelBucketId, std::vector<BelId>> bucket_bels; + + // Arches that want to use the default cell types and bel buckets *must* call these functions in their constructor + bool cell_types_initialised = false; + bool bel_buckets_initialised = false; + void init_cell_types() + { + std::unordered_set<IdString> bel_types; + for (auto bel : getBels()) + bel_types.insert(getBelType(bel)); + std::copy(bel_types.begin(), bel_types.end(), std::back_inserter(cell_types)); + std::sort(cell_types.begin(), cell_types.end()); + cell_types_initialised = true; + } + void init_bel_buckets() + { + for (auto cell_type : getCellTypes()) { + auto bucket = getBelBucketForCellType(cell_type); + bucket_bels[bucket]; // create empty bucket + } + for (auto bel : getBels()) { + auto bucket = getBelBucketForBel(bel); + bucket_bels[bucket].push_back(bel); + } + for (auto &b : bucket_bels) + bel_buckets.push_back(b.first); + std::sort(bel_buckets.begin(), bel_buckets.end()); + bel_buckets_initialised = true; + } }; NEXTPNR_NAMESPACE_END |