n64/tests/unit.h

#ifndef N64_UNIT_H
#define N64_UNIT_H

static int tests_failed = 0;

#define failed(message,...) if (1) { \
    printf(COLOR_RED "[FAILED] ");\
    printf(message "\n" COLOR_END, ##__VA_ARGS__);\
    tests_failed++;}

#define passed(message,...) if (1) { \
    printf(COLOR_GREEN "[PASSED] ");\
    printf(message "\n" COLOR_END, ##__VA_ARGS__);}

typedef struct {
    dword input;
    half immediate;
    dword output;
} case_instr_1_1_imm;

typedef struct {
    dword r1;
    dword r2;
    dword output;
} case_instr_2_1;

typedef struct {
    dword r1;
    dword r2;
    bool taken;
} case_branch_instr;

typedef struct {
    dword input;
    byte sa;
    dword output;
} case_sa_instr;

typedef struct {
    dword r1;
    dword r2;
    dword lo;
    dword hi;
} case_lohi_instr;


void test_instr_1_1_imm(case_instr_1_1_imm test_case, void (*instr)(r4300i_t *, mips_instruction_t), const char* instr_name) {
    int rinput = 1;
    int routput = 2;
    r4300i_t cpu;

    mips_instruction_t i;
    i.i.immediate = test_case.immediate;
    i.i.rs = rinput;
    i.i.rt = routput;

    set_register(&cpu, rinput, test_case.input);

    instr(&cpu, i);

    dword actual = get_register(&cpu, routput);

    if (actual != test_case.output) {
        failed("%s: r%d, (r%d)%ld, %d | Expected: %ld but got %ld", instr_name, routput, rinput, test_case.input, test_case.immediate, test_case.output, actual)
    } else if (SHOULD_LOG_PASSED_TESTS) {
        passed("%s: r%d, (r%d)%ld, %d | Expected: %ld and got %ld", instr_name, routput, rinput, test_case.input, test_case.immediate, test_case.output, actual)
    }
}

void test_instr_2_1(case_instr_2_1 test_case, void (*instr)(r4300i_t *, mips_instruction_t), const char* instr_name) {
    int rinput1 = 1;
    int rinput2 = 2;
    int routput = 3;

    r4300i_t cpu;

    mips_instruction_t i;
    i.r.rs = rinput1;
    i.r.rt = rinput2;
    i.r.rd = routput;

    set_register(&cpu, rinput1, test_case.r1);
    set_register(&cpu, rinput2, test_case.r2);

    instr(&cpu, i);

    dword actual = get_register(&cpu, routput);

    if (actual != test_case.output) {
        failed("%s: r%d, (r%d)%ld, (r%d)%ld | Expected: %ld but got %ld", instr_name, routput, rinput1, test_case.r1, rinput2, test_case.r2, test_case.output, actual)
    } else if (SHOULD_LOG_PASSED_TESTS) {
        passed("%s: r%d, (r%d)%ld, (r%d)%ld | Expected: %ld and got %ld", instr_name, routput, rinput1, test_case.r1, rinput2, test_case.r2, test_case.output, actual)
    }
}

#define taken_macro(t) ((t) ? "taken" : "not taken")
void test_instr_branch(case_branch_instr test_case, void (*instr)(r4300i_t *, mips_instruction_t), const char* instr_name) {
    int r1 = 1;
    int r2 = 2;

    r4300i_t cpu;
    cpu.branch = false;

    mips_instruction_t i;
    i.i.rs = r1;
    i.i.rt = r2;

    set_register(&cpu, r1, test_case.r1);
    set_register(&cpu, r2, test_case.r2);

    instr(&cpu, i);

    bool taken = cpu.branch;

    if (taken != test_case.taken) {
        failed("%s: (r%d)0x%016lX, (r%d)0x%016lX | Expected: %s but got %s", instr_name, r1, test_case.r1, r2, test_case.r2, taken_macro(test_case.taken), taken_macro(taken))
    } else if (SHOULD_LOG_PASSED_TESTS) {
        passed("%s: (r%d)0x%016lX, (r%d)0x%016lX | Expected: %s and got %s", instr_name, r1, test_case.r1, r2, test_case.r2, taken_macro(test_case.taken), taken_macro(taken))
    }
}

void test_instr_sa(case_sa_instr test_case, void (*instr)(r4300i_t *, mips_instruction_t), const char* instr_name) {
    int rinput = 1;
    int routput = 2;

    r4300i_t cpu;

    mips_instruction_t i;
    i.r.rt = rinput;
    i.r.sa = test_case.sa;
    i.r.rd = routput;

    set_register(&cpu, rinput, test_case.input);

    instr(&cpu, i);

    dword actual = get_register(&cpu, routput);
    dword expected = test_case.output;

    if (expected != actual) {
        failed("%s: (r%d)0x%016lX, 0x%02X | Expected: 0x%016lX but got 0x%016lX", instr_name, rinput, test_case.input, test_case.sa, expected, actual)
    } else if (SHOULD_LOG_PASSED_TESTS) {
        passed("%s: (r%d)0x%016lX, 0x%02X | Expected: 0x%016lX and got 0x%016lX", instr_name, rinput, test_case.input, test_case.sa, expected, actual)
    }
}

void test_instr_lohi(case_lohi_instr test_case, void (*instr)(r4300i_t *, mips_instruction_t), const char* instr_name) {
    int r1 = 1;
    int r2 = 2;

    r4300i_t cpu;

    mips_instruction_t i;
    i.r.rs = r1;
    i.r.rt = r2;

    set_register(&cpu, r1, test_case.r1);
    set_register(&cpu, r2, test_case.r2);

    instr(&cpu, i);

    dword expected_lo = test_case.lo;
    dword expected_hi = test_case.hi;

    dword actual_lo = cpu.mult_lo;
    dword actual_hi = cpu.mult_hi;

    if (expected_lo != actual_lo) {
        failed("%s: (r%d)0x%016lX, (r%d)0x%016lX | LO Expected: 0x%016lX but got 0x%016lX", instr_name, r1, test_case.r1, r2, test_case.r2, expected_lo, actual_lo)
    } else if (expected_hi != actual_hi) {
        failed("%s: (r%d)0x%016lX, (r%d)0x%016lX | HI Expected: 0x%016lX but got 0x%016lX", instr_name, r1, test_case.r1, r2, test_case.r2, expected_hi, actual_hi)
    } else if (SHOULD_LOG_PASSED_TESTS) {
        passed("%s: (r%d)0x%016lX, (r%d)0x%016lX | LO Expected: 0x%016lX and got 0x%016lX", instr_name, r1, test_case.r1, r2, test_case.r2, expected_lo, actual_lo)
        passed("%s: (r%d)0x%016lX, (r%d)0x%016lX | HI Expected: 0x%016lX and got 0x%016lX", instr_name, r1, test_case.r1, r2, test_case.r2, expected_hi, actual_hi)
    }
}

#endif //N64_UNIT_H