Add some integration tests: successful compilation and execution

1 files changed, 88 insertions, 0 deletions

diff --git a/test/integration/top.cpp b/test/integration/top.cpp
new file mode 100644
index 00000000..8bfe2a99
--- /dev/null
+++ b/test/integration/top.cpp
@@ -0,0 +1,88 @@
+#include <verilated.h>
+#include <iostream>
+
+#if VM_TRACE
+# include <verilated_vcd_c.h>	// Trace file format header
+#endif
+
+using namespace std;
+
+//VGCDTester *top;
+TOP_TYPE *top;
+
+vluint64_t main_time = 0;       // Current simulation time
+        // This is a 64-bit integer to reduce wrap over issues and
+        // allow modulus.  You can also use a double, if you wish.
+
+double sc_time_stamp () { // Called by $time in Verilog
+  return main_time;       // converts to double, to match
+                          // what SystemC does
+}
+
+// TODO Provide command-line options like vcd filename, timeout count, etc.
+const long timeout = 100000000L;
+
+int main(int argc, char** argv) {
+  Verilated::commandArgs(argc, argv);   // Remember args
+  top = new TOP_TYPE;
+
+#if VM_TRACE			// If verilator was invoked with --trace
+    Verilated::traceEverOn(true);	// Verilator must compute traced signals
+    VL_PRINTF("Enabling waves...\n");
+    VerilatedVcdC* tfp = new VerilatedVcdC;
+    top->trace (tfp, 99);	// Trace 99 levels of hierarchy
+    tfp->open ("dump.vcd");	// Open the dump file
+#endif
+
+
+  top->reset = 1;
+
+  cout << "Starting simulation!\n";
+
+  while (!Verilated::gotFinish() && main_time < timeout) {
+    if (main_time > 10) {
+      top->reset = 0;   // Deassert reset
+    }
+    if ((main_time % 10) == 1) {
+      top->clk = 1;       // Toggle clock
+    }
+    if ((main_time % 10) == 6) {
+      top->clk = 0;
+    }
+    top->eval();               // Evaluate model
+#if VM_TRACE
+	if (tfp) tfp->dump (main_time);	// Create waveform trace for this timestamp
+#endif
+    main_time++;               // Time passes...
+  }
+
+  if (main_time >= timeout) {
+      cout << "Simulation terminated by timeout at time " << main_time <<
+              " (cycle " << main_time / 10 << ")"<< endl;
+      return -1;
+  } else {
+      cout << "Simulation completed at time " << main_time <<
+              " (cycle " << main_time / 10 << ")"<< endl;
+  }
+
+  // Run for 10 more clocks
+  vluint64_t end_time = main_time + 100;
+  while (main_time < end_time) {
+    if ((main_time % 10) == 1) {
+      top->clk = 1;       // Toggle clock
+    }
+    if ((main_time % 10) == 6) {
+      top->clk = 0;
+    }
+    top->eval();               // Evaluate model
+#if VM_TRACE
+	if (tfp) tfp->dump (main_time);	// Create waveform trace for this timestamp
+#endif
+    main_time++;               // Time passes...
+  }
+
+#if VM_TRACE
+    if (tfp) tfp->close();
+#endif
+}
+