verify.cpp

#include "testbench.h"
#include <cstdlib>

Vdut *top;
VerilatedVcdC *tfp;
unsigned int ticks = 0;

class CpuTestbench : public Testbench
{
protected:
    void initializeInputs() override
    {
        top->clk = 1;
        top->rst = 0;
    }
};

TEST_F(CpuTestbench, BaseProgramTest)
{
    bool success = false;
    system("./compile.sh asm/program.S");

    for (int i = 0; i < 1000; i++)
    {
        runSimulation(1);
        if (top->a0 == 254)
        {
            SUCCEED();
            success = true;
            break;
        }
    }
    if (!success)
    {
        FAIL() << "Counter did not reach 254";
    }
}

// Note this is how we are going to test your CPU. Do not worry about this for
// now, as it requires a lot more instructions to function
TEST_F(CpuTestbench, Return5Test)
{
    system("./compile.sh c/return_5.c");
    runSimulation(100);
    EXPECT_EQ(top->a0, 5);
}

int main(int argc, char **argv)
{
    top = new Vdut;
    tfp = new VerilatedVcdC;

    Verilated::traceEverOn(true);
    top->trace(tfp, 99);
    tfp->open("waveform.vcd");

    testing::InitGoogleTest(&argc, argv);
    auto res = RUN_ALL_TESTS();

    top->final();
    tfp->close();

    delete top;
    delete tfp;

    return res;
}