From 9901a5fafc8ea05e21eae434e4a56c921eb951e7 Mon Sep 17 00:00:00 2001
From: gatecat <gatecat@ds0.me>
Date: Sat, 1 May 2021 13:12:33 +0100
Subject: cyclonev: Add wire and pip types

Signed-off-by: gatecat <gatecat@ds0.me>
---
 cyclonev/arch.h     | 20 ++++++++++++++++++--
 cyclonev/archdefs.h | 37 +++++++++++++++++++++++++++----------
 2 files changed, 45 insertions(+), 12 deletions(-)

diff --git a/cyclonev/arch.h b/cyclonev/arch.h
index 84ab72f2..e1294e3f 100644
--- a/cyclonev/arch.h
+++ b/cyclonev/arch.h
@@ -54,6 +54,22 @@ struct BelInfo
     bool gb;
 };
 
+struct WireInfo
+{
+    // name_override is only used for nextpnr-created wires
+    // otherwise; this is empty and a name is created according to mistral rules
+    IdString name_override;
+
+    // these are transformed on-the-fly to PipId by the iterator, to save space (WireId is half the size of PipId)
+    std::vector<WireId> wires_downhill;
+    std::vector<WireId> wires_uphill;
+
+    std::vector<BelPin> bel_pins;
+
+    // flags for special wires (currently unused)
+    uint64_t flags;
+};
+
 struct ArchRanges : BaseArchRanges
 {
     using ArchArgsT = ArchArgs;
@@ -117,8 +133,8 @@ struct Arch : BaseArch<ArchRanges>
     const std::vector<PipId> &getPips() const override;
     Loc getPipLocation(PipId pip) const override;
     IdStringList getPipName(PipId pip) const override;
-    WireId getPipSrcWire(PipId pip) const override;
-    WireId getPipDstWire(PipId pip) const override;
+    WireId getPipSrcWire(PipId pip) const override { return WireId(pip.src); };
+    WireId getPipDstWire(PipId pip) const override { return WireId(pip.dst); };
     DelayQuad getPipDelay(PipId pip) const override;
     const std::vector<PipId> &getPipsDownhill(WireId wire) const override;
     const std::vector<PipId> &getPipsUphill(WireId wire) const override;
diff --git a/cyclonev/archdefs.h b/cyclonev/archdefs.h
index 71948ca1..249fd3d2 100644
--- a/cyclonev/archdefs.h
+++ b/cyclonev/archdefs.h
@@ -25,6 +25,7 @@
 #include "cyclonev.h"
 
 #include "idstring.h"
+#include "nextpnr_assertions.h"
 #include "nextpnr_namespaces.h"
 
 NEXTPNR_NAMESPACE_BEGIN
@@ -84,22 +85,35 @@ struct BelId
     bool operator<(const BelId &other) const { return pos < other.pos || (pos == other.pos && z < other.z); }
 };
 
+static constexpr auto invalid_rnode = std::numeric_limits<CycloneV::rnode_t>::max();
+
 struct WireId
 {
-    int32_t index = -1;
+    WireId() = default;
+    explicit WireId(CycloneV::rnode_t node) : node(node){};
+    CycloneV::rnode_t node = invalid_rnode;
+
+    // Wires created by nextpnr have rnode type >= 128
+    bool is_nextpnr_created() const
+    {
+        NPNR_ASSERT(node != invalid_rnode);
+        return CycloneV::rn2t(node) >= 128;
+    }
 
-    bool operator==(const WireId &other) const { return index == other.index; }
-    bool operator!=(const WireId &other) const { return index != other.index; }
-    bool operator<(const WireId &other) const { return index < other.index; }
+    bool operator==(const WireId &other) const { return node == other.node; }
+    bool operator!=(const WireId &other) const { return node != other.node; }
+    bool operator<(const WireId &other) const { return node < other.node; }
 };
 
 struct PipId
 {
-    int32_t index = -1;
+    PipId() = default;
+    PipId(CycloneV::rnode_t src, CycloneV::rnode_t dst) : src(src), dst(dst){};
+    CycloneV::rnode_t src = invalid_rnode, dst = invalid_rnode;
 
-    bool operator==(const PipId &other) const { return index == other.index; }
-    bool operator!=(const PipId &other) const { return index != other.index; }
-    bool operator<(const PipId &other) const { return index < other.index; }
+    bool operator==(const PipId &other) const { return src == other.src && dst == other.dst; }
+    bool operator!=(const PipId &other) const { return src != other.src || dst != other.dst; }
+    bool operator<(const PipId &other) const { return dst < other.dst || (dst == other.dst && src < other.src); }
 };
 
 typedef IdString DecalId;
@@ -129,13 +143,16 @@ template <> struct hash<NEXTPNR_NAMESPACE_PREFIX WireId>
 {
     std::size_t operator()(const NEXTPNR_NAMESPACE_PREFIX WireId &wire) const noexcept
     {
-        return hash<int>()(wire.index);
+        return hash<uint32_t>()(wire.node);
     }
 };
 
 template <> struct hash<NEXTPNR_NAMESPACE_PREFIX PipId>
 {
-    std::size_t operator()(const NEXTPNR_NAMESPACE_PREFIX PipId &pip) const noexcept { return hash<int>()(pip.index); }
+    std::size_t operator()(const NEXTPNR_NAMESPACE_PREFIX PipId &pip) const noexcept
+    {
+        return hash<uint64_t>()((uint64_t(pip.dst) << 32) | pip.src);
+    }
 };
 
 } // namespace std
-- 
cgit v1.2.3