From 027cf94fbafc3594206119ebe00d28b2a5593efb Mon Sep 17 00:00:00 2001
From: Rowan Goemans <goemansrowan@gmail.com>
Date: Thu, 26 Sep 2024 18:24:16 +0200
Subject: [PATCH] timing_constraint: add file

---
 common/kernel/timing_constraint.cc | 37 ++++++++++++++++
 common/kernel/timing_constraint.h  | 68 ++++++++++++++++++++++++++++++
 2 files changed, 105 insertions(+)
 create mode 100644 common/kernel/timing_constraint.cc
 create mode 100644 common/kernel/timing_constraint.h

diff --git a/common/kernel/timing_constraint.cc b/common/kernel/timing_constraint.cc
new file mode 100644
index 00000000..20b34b09
--- /dev/null
+++ b/common/kernel/timing_constraint.cc
@@ -0,0 +1,37 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2024  rowanG077 <goemansrowan@gmail.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "timing_constraint.h"
+#include "log.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+const std::string MinMaxDelay::type_to_str(MinMaxDelay::Type typ)
+{
+    switch (typ) {
+    case Type::MAXDELAY:
+        return "MAXDELAY";
+    case Type::MINDELAY:
+        return "MINDELAY";
+    default:
+        log_error("Impossible MinMaxDelay::Type");
+    }
+}
+
+NEXTPNR_NAMESPACE_END
diff --git a/common/kernel/timing_constraint.h b/common/kernel/timing_constraint.h
new file mode 100644
index 00000000..69a2f910
--- /dev/null
+++ b/common/kernel/timing_constraint.h
@@ -0,0 +1,68 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2024  rowanG077 <goemansrowan@gmail.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef TIMING_CONSTRAINT_H
+#define TIMING_CONSTRAINT_H
+
+#include "nextpnr_types.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+struct FalsePath
+{
+};
+
+struct MinMaxDelay
+{
+    enum class Type
+    {
+        MAXDELAY,
+        MINDELAY
+    };
+
+    [[maybe_unused]] const std::string type_to_str(Type typ);
+
+    Type type;
+    delay_t delay;
+    bool datapath_only;
+};
+
+struct MultiCycle
+{
+    size_t cycles;
+    enum class Type
+    {
+        SETUP,
+        HOLD
+    };
+};
+
+using TimingException = std::variant<FalsePath, MinMaxDelay, MultiCycle>;
+
+struct PathConstraint
+{
+    TimingException exception;
+
+    pool<CellPortKey> from;
+    pool<CellPortKey> to;
+};
+
+NEXTPNR_NAMESPACE_END
+
+#endif