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/async.h | 225 -----------------------------------------------------------
 1 file changed, 225 deletions(-)
 delete mode 100644 aisa/async.h

(limited to 'aisa/async.h')

diff --git a/aisa/async.h b/aisa/async.h
deleted file mode 100644
index 42e99e7..0000000
--- a/aisa/async.h
+++ /dev/null
@@ -1,225 +0,0 @@
-#pragma once
-
-#include <coroutine>
-#include <optional>
-#include <utility>
-#include <memory>
-#include <vector>
-
-#include "aisa/aisa.h"
-#include "aisa/coroutine.h" // IWYU pragma: export
-
-namespace aisa {
-
-    template<typename CRTP> struct AsyncEval {
-        CRTP & crtp() noexcept { return static_cast<CRTP &>(*this); }
-
-        task<regval_t> async_load_reg(regnum_t rn)
-        {
-            while (true) {
-                if (auto rv = crtp().load_reg(rn); rv.has_value())
-                    co_return *rv;
-                co_await std::suspend_always{};
-            }
-        }
-
-        task<void> async_store_reg(regnum_t rn, regval_t rv)
-        {
-            while (true) {
-                if (crtp().store_reg(rn, rv))
-                    co_return;
-                co_await std::suspend_always{};
-            }
-        }
-
-        task<void> async_fetch_mem(byte_t *bytes, addr_t physical_addr, addr_t size)
-        {
-            while (true) {
-                if (crtp().fetch_mem(bytes, physical_addr, size))
-                    co_return;
-                co_await std::suspend_always{};
-            }
-        }
-
-        task<void> async_store_mem(addr_t physical_addr, const byte_t *bytes, addr_t size)
-        {
-            while (true) {
-                if (crtp().store_mem(physical_addr, bytes, size))
-                    co_return;
-                co_await std::suspend_always{};
-            }
-        }
-
-        task<bool> async_predicate(const Step &step)
-        {
-            if (step.predicate.has_value()) {
-                regval_t pval = co_await crtp().async_load_reg(step.predicate->first);
-                co_return pval == step.predicate->second;
-            }
-            co_return true;
-        }
-
-        task<void> async_load_source_registers(const Step &step, Wires &w)
-        {
-            w.source_vals.resize(step.source_regs.size());
-            for (unsigned int i = 0; i < step.source_regs.size(); ++i)
-                w.source_vals[i] = co_await crtp().async_load_reg(step.source_regs[i]);
-        }
-
-        task<void> async_load_source_memory(const Step &step, const MemInfo &mi, Wires &w)
-        {
-            w.memory_val.resize(mi.size);
-            co_await crtp().async_fetch_mem(w.memory_val.data(), mi.physical_addr, mi.size);
-        }
-
-        task<void> async_load_sources(const Step &step, Wires &w)
-        {
-            co_await crtp().async_load_source_registers(step, w);
-
-            if (step.mop == MOp::LOAD) {
-                auto mi = step.meminfo(w);
-                co_await crtp().async_load_source_memory(step, mi, w);
-            }
-        }
-
-        task<void> async_write_destination_registers(const Step &step, const Wires &w)
-        {
-            for (unsigned int i = 0; i < step.destination_regs.size(); ++i)
-                co_await crtp().async_store_reg(step.destination_regs[i], w.destination_vals[i]);
-        }
-
-        task<void> async_write_destination_memory(const Step &step, const MemInfo &mi, const Wires &w)
-        {
-            co_await crtp().async_store_mem(mi.physical_addr, w.memory_val.data(), mi.size);
-        }
-
-        task<void> async_write_destinations(const Step &step, const Wires &w)
-        {
-            if (w.aborted)
-                co_return;
-
-            co_await crtp().async_write_destination_registers(step, w);
-
-            if (step.mop == MOp::STORE) {
-                auto mi = step.meminfo(w);
-                co_await crtp().async_write_destination_memory(step, mi, w);
-            }
-        }
-
-        task<void> async_push_task(std::unique_ptr<const Task> &&task)
-        {
-            while (true) {
-                if (crtp().push_task(std::move(task)))
-                    co_return;
-                co_await std::suspend_always{};
-            }
-        }
-
-        task<void> async_new_task(std::unique_ptr<const Task> &&task, regval_t environment_val)
-        {
-            auto rn = task->environment;
-            co_await crtp().async_push_task(std::move(task));
-            co_await crtp().async_store_reg(rn, environment_val);
-        }
-
-        task<Wires> async_run_step(const Step &step)
-        {
-            Wires w;
-
-            if (!co_await crtp().async_predicate(step))
-                co_return std::move(w);
-
-            co_await crtp().async_load_sources(step, w);
-
-            step.evaluate(w);
-
-            co_await crtp().async_write_destinations(step, w);
-
-            if (w.new_task.has_value())
-                co_await crtp().async_new_task(std::move(w.new_task->first), w.new_task->second);
-
-            co_return std::move(w);
-        }
-
-        task<const Task *> async_top_task()
-        {
-            while (true) {
-                if (auto rv = crtp().top_task(); rv.has_value())
-                    co_return &**rv;
-                co_await std::suspend_always{};
-            }
-        }
-
-        task<void> async_pop_task()
-        {
-            while (true) {
-                if (crtp().pop_task())
-                    co_return;
-                co_await std::suspend_always{};
-            }
-        }
-
-        task<std::optional<std::unique_ptr<const Step>>> async_fetch_step()
-        {
-            auto task = co_await crtp().async_top_task();
-
-            auto rn = task->environment;
-            auto rv = co_await crtp().async_load_reg(rn);
-
-            auto step = task->step(rv);
-            if (step.has_value()) {
-                co_await crtp().async_store_reg(rn, step->second);
-                co_return std::move(step->first);
-            } else {
-                co_await crtp().async_pop_task();
-                co_return {};
-            }
-        }
-
-        task<std::pair<std::unique_ptr<const Step>, Wires>> async_fetch_and_run_step()
-        {
-            while (true) {
-                if (auto step = co_await crtp().async_fetch_step(); step.has_value()) {
-                    auto wires = co_await crtp().async_run_step(**step);
-                    co_return {std::move(*step), std::move(wires)};
-                }
-            }
-        }
-
-        task<void> async_run_subtree()
-        {
-            while (true) {
-                if (auto step = co_await crtp().async_fetch_step(); step.has_value())
-                    co_await crtp().async_run_step_and_subtree(**step);
-                else
-                    break;
-            }
-        }
-
-        task<Wires> async_run_step_and_subtree(const Step &step)
-        {
-            auto w = co_await crtp().async_run_step(step);
-
-            if (w.new_task.has_value())
-                co_await crtp().async_run_subtree();
-
-            co_return std::move(w);
-        }
-
-        task<void> async_setup_initial_task(const ISA &isa)
-        {
-            auto task = isa.initial_task();
-
-            co_await crtp().async_new_task(std::move(task.first), task.second);
-        }
-
-        task<void> async_run(const ISA &isa)
-        {
-            co_await crtp().async_setup_initial_task(isa);
-
-            co_await crtp().async_run_subtree();
-        }
-
-    };
-
-}
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