{SLICEL,SLICEM} -> QUARTER_SLICE

xc7/arch.cc

@@ -36,6 +36,7 @@ NEXTPNR_NAMESPACE_BEGIN
 const DDB *torc = nullptr;
 const Sites *torc_sites = nullptr;
 const Tiles *torc_tiles = nullptr;
+std::vector<IdString> bel_index_to_type;
 
 
 // -----------------------------------------------------------------------
@@ -71,6 +72,17 @@ Arch::Arch(ArchArgs args) : args(args)
     torc_sites = &torc->getSites();
     torc_tiles = &torc->getTiles();
 
+    bel_index_to_type.resize(torc_sites->getSiteCount());
+    for (SiteIndex i(0); i < torc_sites->getSiteCount(); ++i) {
+        const auto& s = torc_sites->getSite(i);
+        auto pd = s.getPrimitiveDefPtr();
+        const auto& type = pd->getName();
+        if (type == "SLICEL" || type == "SLICEM")
+            bel_index_to_type[i] = id_QUARTER_SLICE;
+        else
+            bel_index_to_type[i] = id(type);
+    }
+
     bel_to_cell.resize(torc_sites->getSiteCount());
 }
 
@@ -115,6 +127,15 @@ BelId Arch::getBelByLocation(Loc loc) const
         for (SiteIndex i(0); i < torc_sites->getSiteCount(); ++i) {
             BelId b;
             b.index = i;
+            if (bel_index_to_type[i] == id_QUARTER_SLICE) {
+                b.pos = BelId::A;
+                bel_by_loc[getBelLocation(b)] = b;
+                b.pos = BelId::B;
+                bel_by_loc[getBelLocation(b)] = b;
+                b.pos = BelId::C;
+                bel_by_loc[getBelLocation(b)] = b;
+                b.pos = BelId::D;
+            }
             bel_by_loc[getBelLocation(b)] = b;
         }
     }
@@ -130,12 +151,14 @@ BelRange Arch::getBelsByTile(int x, int y) const
 {
     BelRange br;
 
-    br.b.cursor = std::next(torc_sites->getSites().begin(), Arch::getBelByLocation(Loc(x, y, 0)).index);
-    br.e.cursor = br.b.cursor;
+    auto b = getBelByLocation(Loc(x, y, 0));
+    br.b.index = b.index;
+    br.b.pos = b.pos;
+    br.e = br.b;
 
-    if (br.e.cursor != torc_sites->getSites().end()) {
-        while (br.e.cursor < torc_sites->getSites().end() && torc_sites->getSite((*br.e).index).getTileIndex() == torc_sites->getSite((*br.b).index).getTileIndex())
-            br.e.cursor++;
+    if (br.e.index != SiteIndex(torc_sites->getSiteCount())) {
+        while (br.e.index < SiteIndex(torc_sites->getSiteCount()) && torc_sites->getSite((*br.e).index).getTileIndex() == torc_sites->getSite((*br.b).index).getTileIndex())
+            br.e++;
     }
 
     return br;
@@ -674,7 +697,7 @@ std::vector<GraphicElement> Arch::getDecalGraphics(DecalId decal) const
 
 bool Arch::getCellDelay(const CellInfo *cell, IdString fromPort, IdString toPort, DelayInfo &delay) const
 {
-    if (cell->type == id_SLICEL)
+    if (cell->type == id_QUARTER_SLICE)
     {
         if (fromPort.index >= id_A1.index && fromPort.index <= id_A6.index)
             return toPort == id_A || toPort == id_AQ;
@@ -689,7 +712,7 @@ bool Arch::getCellDelay(const CellInfo *cell, IdString fromPort, IdString toPort
 // Get the port class, also setting clockPort to associated clock if applicable
 TimingPortClass Arch::getPortTimingClass(const CellInfo *cell, IdString port, IdString &clockPort) const
 {
-    if (cell->type == id_SLICEL) {
+    if (cell->type == id_QUARTER_SLICE) {
         if (port == id_CLK)
             return TMG_CLOCK_INPUT;
         if (port == id_CIN)
@@ -754,7 +777,7 @@ void Arch::assignArchInfo()
 void Arch::assignCellInfo(CellInfo *cell)
 {
     cell->belType = cell->type;
-    if (cell->type == id_SLICEL) {
+    if (cell->type == id_QUARTER_SLICE) {
         cell->lcInfo.dffEnable = bool_or_default(cell->params, id_DFF_ENABLE);
         cell->lcInfo.carryEnable = bool_or_default(cell->params, id_CARRY_ENABLE);
         cell->lcInfo.negClk = bool_or_default(cell->params, id_NEG_CLK);
@@ -773,4 +796,14 @@ void Arch::assignCellInfo(CellInfo *cell)
     }
 }
 
+void operator++(BelId::bel &b) {
+    switch (b) {
+        case BelId::A: b = BelId::B; return;
+        case BelId::B: b = BelId::C; return;
+        case BelId::C: b = BelId::D; return;
+        default: break;
+    }
+    throw;
+}
+
 NEXTPNR_NAMESPACE_END

xc7/arch.h

@@ -236,36 +236,41 @@ NPNR_PACKED_STRUCT(struct ChipInfoPOD {
 extern const DDB *torc;
 extern const Sites *torc_sites;
 extern const Tiles *torc_tiles;
+extern std::vector<IdString> bel_index_to_type;
 
 
 /************************ End of chipdb section. ************************/
 
-struct BelIterator
+struct BelIterator : public BelId
 {
-    Array<const Site>::iterator cursor;
-
     BelIterator operator++()
     {
-        cursor++;
+        if (bel_index_to_type[index] == id_QUARTER_SLICE) {
+            if (pos < D) {
+                ++pos;
+                return *this;
+            }
+        }
+
+        if (bel_index_to_type[++index] == id_QUARTER_SLICE)
+            pos = A;
+        else
+            pos = NOT_APPLICABLE;
+
         return *this;
     }
     BelIterator operator++(int)
     {
         BelIterator prior(*this);
-        cursor++;
+        operator++();
         return prior;
     }
 
-    bool operator!=(const BelIterator &other) const { return cursor != other.cursor; }
+    bool operator!=(const BelIterator &other) const { return BelId::operator!=(other); }
 
-    bool operator==(const BelIterator &other) const { return cursor == other.cursor; }
+    bool operator==(const BelIterator &other) const { return BelId::operator==(other); }
 
-    BelId operator*() const
-    {
-        BelId ret;
-        ret.index = SiteIndex(std::distance(torc_sites->getSites().begin(), cursor));
-        return ret;
-    }
+    BelId operator*() const { return *this; }
 };
 
 struct BelRange
@@ -472,8 +477,8 @@ struct Arch : BaseCtx
     BelRange getBels() const
     {
         BelRange range;
-        range.b.cursor = torc_sites->getSites().begin();
-        range.e.cursor = torc_sites->getSites().end();
+        range.b.index = SiteIndex(0);
+        range.e.index = SiteIndex(torc_sites->getSiteCount());
         return range;
     }
 
@@ -496,9 +501,7 @@ struct Arch : BaseCtx
     IdString getBelType(BelId bel) const
     {
         NPNR_ASSERT(bel != BelId());
-        const auto& site = torc_sites->getSite(bel.index);
-        auto prim_def = site.getPrimitiveDefPtr();
-        return id(prim_def->getName());
+        return bel_index_to_type[bel.index];
     }
 
     WireId getBelPinWire(BelId bel, IdString pin) const;

xc7/archdefs.h

@@ -67,10 +67,12 @@ enum ConstIds
 struct BelId
 {
     SiteIndex index = SiteIndex(-1);
+    enum bel : int8_t { NOT_APPLICABLE, A, B, C, D } pos = NOT_APPLICABLE;
 
-    bool operator==(const BelId &other) const { return index == other.index; }
-    bool operator!=(const BelId &other) const { return index != other.index; }
+    bool operator==(const BelId &other) const { return index == other.index && pos == pos; }
+    bool operator!=(const BelId &other) const { return index != other.index || pos != pos; }
 };
+void operator++(BelId::bel &b);
 
 struct WireId
 {

xc7/cells.cc

@@ -43,7 +43,7 @@ std::unique_ptr<CellInfo> create_ice_cell(Context *ctx, IdString type, std::stri
     }
     new_cell->type = type;
     if (type == ctx->id("XC7_LC")) {
-        new_cell->type = id_SLICEL; // HACK HACK HACK: Place one LC into each slice
+        new_cell->type = id_QUARTER_SLICE; // HACK HACK HACK: Place one LC into each slice
         new_cell->params[ctx->id("LUT_INIT")] = "0";
         new_cell->params[ctx->id("NEG_CLK")] = "0";
         new_cell->params[ctx->id("CARRY_ENABLE")] = "0";

xc7/constids.inc

@@ -464,7 +464,7 @@ X(FDCE)
 X(FDPE)
 
 X(BUFGCTRL)
-X(SLICEL)
+X(QUARTER_SLICE)
 X(IOBUF)
 X(IOB33S)
 X(IOB33M) // What is the difference between IOB33S and IOB33M?