From f0d4e4fbc3847635e0f6151a9eda52b7fb952c19 Mon Sep 17 00:00:00 2001
From: gatecat <gatecat@ds0.me>
Date: Mon, 2 May 2022 09:56:36 +0100
Subject: generic: Add some extra helpers for viaduct uarches

Signed-off-by: gatecat <gatecat@ds0.me>
---
 generic/arch.cc            | 24 ++++++++++++++++++++++++
 generic/arch.h             |  4 ++++
 generic/viaduct_helpers.cc | 22 ++++++++++++++++++++--
 generic/viaduct_helpers.h  |  6 ++++--
 4 files changed, 52 insertions(+), 4 deletions(-)

diff --git a/generic/arch.cc b/generic/arch.cc
index f622fed3..11b5868b 100644
--- a/generic/arch.cc
+++ b/generic/arch.cc
@@ -43,6 +43,30 @@ WireId Arch::addWire(IdStringList name, IdString type, int x, int y)
     return wire;
 }
 
+WireId Arch::addWireAsBelInput(BelId bel, IdString name)
+{
+    Loc l = getBelLocation(bel);
+    WireId w = addWire(IdStringList::concat(getBelName(bel), name), name, l.x, l.y);
+    addBelInput(bel, name, w);
+    return w;
+}
+
+WireId Arch::addWireAsBelOutput(BelId bel, IdString name)
+{
+    Loc l = getBelLocation(bel);
+    WireId w = addWire(IdStringList::concat(getBelName(bel), name), name, l.x, l.y);
+    addBelOutput(bel, name, w);
+    return w;
+}
+
+WireId Arch::addWireAsBelInout(BelId bel, IdString name)
+{
+    Loc l = getBelLocation(bel);
+    WireId w = addWire(IdStringList::concat(getBelName(bel), name), name, l.x, l.y);
+    addBelInout(bel, name, w);
+    return w;
+}
+
 PipId Arch::addPip(IdStringList name, IdString type, WireId srcWire, WireId dstWire, delay_t delay, Loc loc)
 {
     NPNR_ASSERT(pip_by_name.count(name) == 0);
diff --git a/generic/arch.h b/generic/arch.h
index e96853f1..157ff8af 100644
--- a/generic/arch.h
+++ b/generic/arch.h
@@ -201,6 +201,10 @@ struct Arch : BaseArch<ArchRanges>
     void addBelOutput(BelId bel, IdString name, WireId wire);
     void addBelInout(BelId bel, IdString name, WireId wire);
 
+    WireId addWireAsBelInput(BelId bel, IdString name);
+    WireId addWireAsBelOutput(BelId bel, IdString name);
+    WireId addWireAsBelInout(BelId bel, IdString name);
+
     void addGroupBel(IdStringList group, BelId bel);
     void addGroupWire(IdStringList group, WireId wire);
     void addGroupPip(IdStringList group, PipId pip);
diff --git a/generic/viaduct_helpers.cc b/generic/viaduct_helpers.cc
index a92d0de1..153d2a0e 100644
--- a/generic/viaduct_helpers.cc
+++ b/generic/viaduct_helpers.cc
@@ -25,9 +25,9 @@
 
 NEXTPNR_NAMESPACE_BEGIN
 
-void ViaductHelpers::resize_ids(int x, int y)
+void ViaductHelpers::resize_ids(int x, int y, int z)
 {
-    NPNR_ASSERT(x >= 0 && y >= 0 && x <= 20000 && y <= 20000);
+    NPNR_ASSERT(x >= 0 && y >= 0 && x <= 20000 && y <= 20000 && z <= 1000);
     while (int(x_ids.size()) <= x) {
         IdString next = ctx->id(stringf("X%d", int(x_ids.size())));
         x_ids.push_back(next);
@@ -36,6 +36,10 @@ void ViaductHelpers::resize_ids(int x, int y)
         IdString next = ctx->id(stringf("Y%d", int(y_ids.size())));
         y_ids.push_back(next);
     }
+    while (int(z_ids.size()) <= y) {
+        IdString next = ctx->id(stringf("Z%d", int(z_ids.size())));
+        z_ids.push_back(next);
+    }
 }
 
 IdStringList ViaductHelpers::xy_id(int x, int y, IdString base)
@@ -52,6 +56,20 @@ IdStringList ViaductHelpers::xy_id(int x, int y, IdStringList base)
     return IdStringList::concat(IdStringList(prefix), base);
 }
 
+IdStringList ViaductHelpers::xyz_id(int x, int y, int z, IdString base)
+{
+    resize_ids(x, y, z);
+    std::array<IdString, 4> result{x_ids.at(x), y_ids.at(y), z_ids.at(z), base};
+    return IdStringList(result);
+}
+
+IdStringList ViaductHelpers::xyz_id(int x, int y, int z, IdStringList base)
+{
+    resize_ids(x, y, z);
+    std::array<IdString, 3> prefix{x_ids.at(x), y_ids.at(y), z_ids.at(z)};
+    return IdStringList::concat(IdStringList(prefix), base);
+}
+
 void ViaductHelpers::remove_nextpnr_iobs(const pool<CellTypePort> &top_ports)
 {
     std::vector<IdString> to_remove;
diff --git a/generic/viaduct_helpers.h b/generic/viaduct_helpers.h
index cac22304..213995db 100644
--- a/generic/viaduct_helpers.h
+++ b/generic/viaduct_helpers.h
@@ -58,13 +58,15 @@ struct ViaductHelpers
     Context *ctx;
     void init(Context *ctx) { this->ctx = ctx; }
     // IdStringList components for x and y locations
-    std::vector<IdString> x_ids, y_ids;
-    void resize_ids(int x, int y);
+    std::vector<IdString> x_ids, y_ids, z_ids;
+    void resize_ids(int x, int y, int z = 0);
     // Get an IdStringList for a hierarchical ID
     // Because this uses an IdStringList with seperate X and Y components; this will be much more efficient than
     // creating unique strings for each object in each X and Y position
     IdStringList xy_id(int x, int y, IdString base);
     IdStringList xy_id(int x, int y, IdStringList base);
+    IdStringList xyz_id(int x, int y, int z, IdString base);
+    IdStringList xyz_id(int x, int y, int z, IdStringList base);
     // Common packing functions
     // Remove nextpnr-inserted IO buffers; where IO buffer insertion is done in synthesis
     // expects a set of top-level port types
-- 
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