Adding decode test

1 files changed, 50 insertions, 0 deletions

diff --git a/tb/top/decode_test.cpp b/tb/top/decode_test.cpp
new file mode 100644
index 0000000..3d8589a
--- /dev/null
+++ b/tb/top/decode_test.cpp
@@ -0,0 +1,50 @@
+#include <cstdio>
+
+#include <verilated.h>
+#include <verilated_vcd_c.h>
+
+#include "Vdecode_test.h"               // From Verilating "top.v"
+
+int main(int argc, char** argv) {
+    Verilated::commandArgs(argc, argv);   // Remember args
+	Verilated::traceEverOn(true);
+
+	Vdecode_test top;
+	VerilatedVcdC trace;
+
+	top.trace(&trace, 0);
+	trace.open("decode_test.vcd");
+
+    int instructions[4] = {};
+    top.n = 0;
+    top.z = 0;
+    top.c = 0;
+    top.v = 0;
+
+    int clk_tick = 0;
+	int time = 0;
+
+	for(int i = 0; i < sizeof(instructions); ++i) 
+    {
+        top.insn = instructions[i];
+        top.n = 0;
+        top.z = 0;
+        top.c = 0;
+        top.v = 0;
+
+        top.eval();
+        trace.dump(time++);
+
+        std::printf(" [%c%c%c%c]\n",
+            top.n ? 'N' : 'n',
+            top.z ? 'Z' : 'z',
+            top.c ? 'C' : 'c',
+            top.v ? 'V' : 'v');
+
+        std::printf("insn=%d, ctrl=%d", 
+                    instructions[i], top.ctrl);
+    }
+
+	trace.close();
+    top.final();               // Done simulating
+}