From a4ea46cd5994695670a38d124daa445cb4727925 Mon Sep 17 00:00:00 2001
From: Alex Richardson <Alexander.Richardson@cl.cam.ac.uk>
Date: Thu, 2 Apr 2020 16:12:10 +0100
Subject: [PATCH] Add a simple verilator simulator for module_wrap128_fromMem

---
 CMakeLists.txt | 13 +++++++++++++
 sim_main.cpp   | 27 +++++++++++++++++++++++++++
 2 files changed, 40 insertions(+)
 create mode 100644 CMakeLists.txt
 create mode 100644 sim_main.cpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..435fe43
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,13 @@
+cmake_minimum_required(VERSION 3.16)
+project(cap-lib-verilated)
+set(CMAKE_CXX_STANDARD 14)
+find_package(verilator HINTS $ENV{VERILATOR_ROOT})
+if (NOT verilator_FOUND)
+    message(FATAL_ERROR "Verilator was not found. Either install it, or set the VERILATOR_ROOT environment variable")
+endif()
+add_executable(cap128_fromMem sim_main.cpp)
+if (APPLE)
+    # verilate() complains about --compiler appleclang otherwise
+    set(CMAKE_CXX_COMPILER_ID clang FORCE)
+endif()
+verilate(cap128_fromMem SOURCES module_wrap128_fromMem.v VERILATOR_ARGS --compiler clang)
diff --git a/sim_main.cpp b/sim_main.cpp
new file mode 100644
index 0000000..49e30af
--- /dev/null
+++ b/sim_main.cpp
@@ -0,0 +1,27 @@
+#include "Vmodule_wrap128_fromMem.h"
+#include "verilated.h"
+#include "verilated_vpi.h"  // Required to get definitions
+
+vluint64_t main_time = 0;   // See comments in first example
+double sc_time_stamp() { return main_time; }
+
+template <class T, size_t N> constexpr size_t array_size(T (&)[N]) { return N; }
+
+int main(int argc, char** argv, char** env) {
+  Verilated::commandArgs(argc, argv);
+  Vmodule_wrap128_fromMem* top = new Vmodule_wrap128_fromMem;
+  Verilated::internalsDump();  // See scopes to help debug
+  for (int i = 0; i < array_size(top->wrap128_fromMem_mem_cap); i++) {
+    top->wrap128_fromMem_mem_cap[i] = 0;
+    printf("Input[%d]=%d\n", i, top->wrap128_fromMem_mem_cap[i]);
+  }
+  printf("Eval:\n");
+  // while (!Verilated::gotFinish()) {
+  top->eval();
+  //}
+  for (int i = 0; i < array_size(top->wrap128_fromMem); i++) {
+    printf("Output[%d]=%d\n", i, top->wrap128_fromMem[i]);
+  }
+  delete top;
+  exit(0);
+}