From 6e68e8f0979c7be57e92e17e932da830c8af9717 Mon Sep 17 00:00:00 2001
From: Keith Rothman <537074+litghost@users.noreply.github.com>
Date: Tue, 26 Jan 2021 14:45:54 -0800
Subject: Initial compiling version.

Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
---
 fpga_interchange/arch.cc |  9 +++++++++
 fpga_interchange/arch.h  | 32 ++++++++++++++++----------------
 2 files changed, 25 insertions(+), 16 deletions(-)

diff --git a/fpga_interchange/arch.cc b/fpga_interchange/arch.cc
index d905e7ed..c1f33318 100644
--- a/fpga_interchange/arch.cc
+++ b/fpga_interchange/arch.cc
@@ -349,6 +349,7 @@ std::vector<std::pair<IdString, std::string>> Arch::getBelAttrs(BelId bel) const
 
 delay_t Arch::estimateDelay(WireId src, WireId dst, bool debug) const
 {
+    // FIXME: Implement when adding timing-driven place and route.
     return 0;
 }
 
@@ -383,6 +384,7 @@ ArcBounds Arch::getRouteBoundingBox(WireId src, WireId dst) const
 
 delay_t Arch::getBoundingBoxCost(WireId src, WireId dst, int distance) const
 {
+    // FIXME: Implement when adding timing-driven place and route.
     return 0;
 }
 
@@ -393,6 +395,7 @@ delay_t Arch::getWireRipupDelayPenalty(WireId wire) const
 
 delay_t Arch::predictDelay(const NetInfo *net_info, const PortRef &sink) const
 {
+    // FIXME: Implement when adding timing-driven place and route.
     return 0;
 }
 
@@ -402,16 +405,19 @@ bool Arch::getBudgetOverride(const NetInfo *net_info, const PortRef &sink, delay
 
 bool Arch::pack()
 {
+    // FIXME: Implement this
     return false;
 }
 
 bool Arch::place()
 {
+    // FIXME: Implement this
     return false;
 }
 
 bool Arch::route()
 {
+    // FIXME: Implement this
     return false;
 }
 
@@ -442,16 +448,19 @@ DecalXY Arch::getGroupDecal(GroupId pip) const { return {}; };
 
 bool Arch::getCellDelay(const CellInfo *cell, IdString fromPort, IdString toPort, DelayInfo &delay) const
 {
+    // FIXME: Implement when adding timing-driven place and route.
     return false;
 }
 
 TimingPortClass Arch::getPortTimingClass(const CellInfo *cell, IdString port, int &clockInfoCount) const
 {
+    // FIXME: Implement when adding timing-driven place and route.
     return TMG_IGNORE;
 }
 
 TimingClockingInfo Arch::getPortClockingInfo(const CellInfo *cell, IdString port, int index) const
 {
+    // FIXME: Implement when adding timing-driven place and route.
     TimingClockingInfo info;
     return info;
 }
diff --git a/fpga_interchange/arch.h b/fpga_interchange/arch.h
index 08e2abbb..a14d3096 100644
--- a/fpga_interchange/arch.h
+++ b/fpga_interchange/arch.h
@@ -53,16 +53,6 @@ template <typename T> struct RelPtr
 };
 
 
-
-NPNR_PACKED_STRUCT(struct SiteTypeInfoPOD {
-    // Name of this site type.
-    RelPtr<char> name;
-
-    // Lookup for site pip name to site pip index.
-    int32_t number_site_pips;
-    RelPtr<RelPtr<char>> site_pip_names;
-});
-
 // Flattened site indexing.
 //
 // To enable flat BelId.z spaces, every tile and sites within that tile are
@@ -102,11 +92,15 @@ NPNR_PACKED_STRUCT(struct BelPortPOD {
 });
 
 NPNR_PACKED_STRUCT(struct TileWireInfoPOD {
-    int32_t name;
-    int32_t num_uphill, num_downhill;
+    int32_t name; // wire name constid
 
     // Pip index inside tile
-    RelPtr<int32_t> pips_uphill, pips_downhill;
+    int32_t num_uphill;
+    RelPtr<int32_t> pips_uphill;
+
+    // Pip index inside tile
+    int32_t num_downhill;
+    RelPtr<int32_t> pips_downhill;
 
     // Bel index inside tile
     int32_t num_bel_pins;
@@ -155,6 +149,7 @@ NPNR_PACKED_STRUCT(struct TileInstInfoPOD {
     int32_t type;
 
     // This array is root.tile_types[type].number_sites long.
+    // Index into root.sites
     RelPtr<int32_t> sites;
 
     // Number of tile wires; excluding any site-internal wires
@@ -181,11 +176,17 @@ NPNR_PACKED_STRUCT(struct ChipInfoPOD {
 
     int32_t version;
     int32_t width, height;
-    int32_t num_tiles, num_tile_types;
-    int32_t num_sites, num_nodes;
+
+    int32_t num_tile_types;
     RelPtr<TileTypeInfoPOD> tile_types;
+
+    int32_t num_sites;
     RelPtr<SiteInstInfoPOD> sites;
+
+    int32_t num_tiles;
     RelPtr<TileInstInfoPOD> tiles;
+
+    int32_t num_nodes;
     RelPtr<NodeInfoPOD> nodes;
 });
 
@@ -1011,7 +1012,6 @@ struct Arch : BaseCtx
     std::vector<GroupId> getGroupGroups(GroupId group) const { return {}; }
 
     // -------------------------------------------------
-    mutable IdString gnd_glbl, gnd_row, vcc_glbl, vcc_row;
     delay_t estimateDelay(WireId src, WireId dst, bool debug = false) const;
     delay_t predictDelay(const NetInfo *net_info, const PortRef &sink) const;
     ArcBounds getRouteBoundingBox(WireId src, WireId dst) const;
-- 
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