From c72951a36d6cb9775dc1ecd9bc26bc13e796f10c Mon Sep 17 00:00:00 2001
From: Julian Blake Kongslie
Date: Sat, 2 Jul 2022 13:45:09 -0700
Subject: Dropping the async interface, and adding some real uarch.

---
 aisa/simple-models.cpp | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 aisa/simple-models.cpp

(limited to 'aisa/simple-models.cpp')

diff --git a/aisa/simple-models.cpp b/aisa/simple-models.cpp
new file mode 100644
index 0000000..b69dcb7
--- /dev/null
+++ b/aisa/simple-models.cpp
@@ -0,0 +1,49 @@
+#include <algorithm>
+#include <deque>
+#include <memory>
+#include <optional>
+#include <utility>
+#include <vector>
+
+#include "aisa/aisa.h"
+#include "aisa/simple-models.h"
+
+namespace aisa {
+
+    bool TaskStack::pop_task()
+    {
+        if (tasks.empty())
+            return false;
+        tasks.pop_back();
+        return true;
+    }
+
+    bool TaskStack::push_task(std::unique_ptr<const Task> &&task)
+    {
+        tasks.emplace_back(std::move(task));
+        return true;
+    }
+
+    std::optional<const Task *> TaskStack::top_task()
+    {
+        if (tasks.empty())
+            return {};
+        return tasks.back().get();
+    }
+
+    std::optional<regval_t> VectorRF::load_reg(regnum_t rn) const
+    {
+        if (rf.size() <= rn)
+            return {};
+        return rf[rn];
+    }
+
+    bool VectorRF::store_reg(regnum_t rn, regval_t rv)
+    {
+        if (rf.size() <= rn)
+            rf.resize(rn + 1);
+        rf[rn] = rv;
+        return true;
+    }
+
+}
-- 
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