tinycc/tcctest.c

/*
 * TCC auto test program
 */
#include <tcclib.h>    

/* Unfortunately, gcc version < 3 does not handle that! */
//#define ALL_ISOC99

/* only gcc 3 handles _Bool correctly */
//#define BOOL_ISOC99

#define C99_MACROS

void string_test();
void expr_test();
void macro_test();
void scope_test();
void forward_test();
void funcptr_test();
void loop_test();
void switch_test();
void goto_test();
void enum_test();
void typedef_test();
void struct_test();
void array_test();
void expr_ptr_test();
void bool_test();
void expr2_test();
void constant_expr_test();
void expr_cmp_test();
void char_short_test();
void init_test(void);
void compound_literal_test(void);
int kr_test();
void struct_assign_test(void);
void cast_test(void);
void bitfield_test(void);
void c99_bool_test(void);
void float_test(void);
void longlong_test(void);

int fib(int n);
void num(int n);
void forward_ref(void);
int isid(int c);

#define A 2
#define N 1234 + A
#define pf printf
#define M1(a, b)  (a) + (b)

#define str(s) # s
#define glue(a, b) a ## b
#define xglue(a, b) glue(a, b)
#define HIGHLOW "hello"
#define LOW LOW ", world"

#define min(a, b) ((a) < (b) ? (a) : (b))

#ifdef C99_MACROS
#define dprintf(level,...) printf(__VA_ARGS__)
#endif

/* gcc vararg macros */
#define dprintf1(level, fmt, args...) printf(fmt, ## args)

#define MACRO_NOARGS()

#define AAA 3
#undef AAA
#define AAA 4

#if 1
#define B3 1
#elif 1
#define B3 2
#elif 0
#define B3 3
#else
#define B3 4
#endif

void macro_test()
{
    printf("macro:\n");
    pf("N=%d\n", N);
    printf("aaa=%d\n", AAA);

    printf("min=%d\n", min(1, min(2, -1)));

    printf("s1=%s\n", glue(HIGH, LOW));
    printf("s2=%s\n", xglue(HIGH, LOW));
    printf("s3=%s\n", str("c"));
    printf("s4=%s\n", str(a1));
    printf("B3=%d\n", B3);

#ifdef A
    printf("A defined\n");
#endif
#ifdef B
    printf("B defined\n");
#endif
#ifdef A
    printf("A defined\n");
#else
    printf("A not defined\n");
#endif
#ifdef B
    printf("B defined\n");
#else
    printf("B not defined\n");
#endif

#ifdef A
    printf("A defined\n");
#ifdef B
    printf("B1 defined\n");
#else
    printf("B1 not defined\n");
#endif
#else
    printf("A not defined\n");
#ifdef B
    printf("B2 defined\n");
#else
    printf("B2 not defined\n");
#endif
#endif

#if 1+1
    printf("test true1\n");
#endif
#if 0
    printf("test true2\n");
#endif
#if 1-1
    printf("test true3\n");
#endif
#if defined(A)
    printf("test trueA\n");
#endif
#if defined(B)
    printf("test trueB\n");
#endif

#if 0
    printf("test 0\n");
#elif 0
    printf("test 1\n");
#elif 2
    printf("test 2\n");
#else
    printf("test 3\n");
#endif

    MACRO_NOARGS();

    printf("__LINE__=%d __FILE__=%s\n",
           __LINE__, __FILE__);
    /* not strictly preprocessor, but we test it there */
#ifdef C99_MACROS
    printf("__func__ = %s\n", __func__);
    dprintf(1, "vaarg=%d\n", 1);
#endif
    dprintf1(1, "vaarg1\n");
    dprintf1(1, "vaarg1=%d\n", 2);
    dprintf1(1, "vaarg1=%d %d\n", 1, 2);
}

int op(a,b)
{
    return a / b;
}

int ret(a)
{
    if (a == 2)
        return 1;
    if (a == 3)
        return 2;
    return 0;
}

void ps(char *s)
{
    int c;
    while (1) {
        c = *s;
        if (c == 0)
            break;
        printf("%c", c);
        s++;
    }
}

void string_test()
{
    int b;
    printf("string:\n");
    printf("\141\1423\143\n");/* dezdez test */
    printf("\x41\x42\x43\x3a\n");
    printf("c=%c\n", 'r');
    printf("wc=%C 0x%lx %C\n", L'a', L'\x1234', L'c');
    printf("wstring=%S\n", L"abc");
    printf("wstring=%S\n", L"abc" L"def" "ghi");
    ps("test");
    b = 32;
    while ((b = b + 1) < 96) {
        printf("%c", b);
    }
    printf("\n");
    printf("fib=%d\n", fib(33));
    b = 262144;
    while (b != 0x80000000) {
        num(b);
        b = b * 2;
    }
}

void loop_test()
{
    int i;
    i = 0;
    while (i < 10)
        printf("%d", i++);
    printf("\n");
    for(i = 0; i < 10;i++)
        printf("%d", i);
    printf("\n");
    i = 0;
    do {
        printf("%d", i++);
    } while (i < 10);
    printf("\n");

    /* break/continue tests */
    i = 0;
    while (1) {
        if (i == 6)
            break;
        i++;
        if (i == 3)
            continue;
        printf("%d", i);
    }
    printf("\n");

    /* break/continue tests */
    i = 0;
    do {
        if (i == 6)
            break;
        i++;
        if (i == 3)
            continue;
        printf("%d", i);
    } while(1);
    printf("\n");

    for(i = 0;i < 10;i++) {
        if (i == 3)
            continue;
        printf("%d", i);
    }
    printf("\n");
}


void goto_test()
{
    int i;

    printf("goto:\n");
    i = 0;
 s_loop:
    if (i >= 10) 
        goto s_end;
    printf("%d", i);
    i++;
    goto s_loop;
 s_end:
    printf("\n");
}

enum {
    E0,
    E1 = 2,
    E2 = 4,
    E3,
    E4,
};

enum test {
    E5 = 1000,
};

void enum_test()
{
    enum test b1;
    printf("enum:\n%d %d %d %d %d %d\n",
           E0, E1, E2, E3, E4, E5);
    b1 = 1;
    printf("b1=%d\n", b1);
}

typedef int *my_ptr;

void typedef_test()
{
    my_ptr a;
    int b;
    a = &b;
    *a = 1234;
    printf("typedef:\n");
    printf("a=%d\n", *a);
}

void forward_test()
{
    printf("forward:\n");
    forward_ref();
    forward_ref();
}


void forward_ref(void)
{
    printf("forward ok\n");
}

typedef struct struct1 {
    int f1;
    int f2, f3;
    union union1 {
        int v1;
        int v2;
    } u;
    char str[3];
} struct1;

struct struct2 {
    int a;
    char b;
};

union union2 {
    int w1;
    int w2;
};

struct struct1 st1, st2;

int main(int argc, char **argv)
{
    string_test();
    expr_test();
    macro_test();
    scope_test();
    forward_test();
    funcptr_test();
    loop_test();
    switch_test();
    goto_test();
    enum_test();
    typedef_test();
    struct_test();
    array_test();
    expr_ptr_test();
    bool_test();
    expr2_test();
    constant_expr_test();
    expr_cmp_test();
    char_short_test();
    init_test();
    compound_literal_test();
    kr_test();
    struct_assign_test();
    cast_test();
    bitfield_test();
    c99_bool_test();
    float_test();
    longlong_test();
    return 0; 
}

int tab[3];
int tab2[3][2];

int g;

void f1(g)
{
    printf("g1=%d\n", g);
}

void scope_test()
{
    printf("scope:\n");
    g = 2;
    f1(1);
    printf("g2=%d\n", g);
    {
        int g;
        g = 3;
        printf("g3=%d\n", g);
        {
            int g;
            g = 4;
            printf("g4=%d\n", g);
        }
    }
    printf("g5=%d\n", g);
}

void array_test(int a[4])
{
    int i, j;

    printf("array:\n");
    printf("sizeof(a) = %d\n", sizeof(a));
    printf("sizeof(int) = %d\n", sizeof(int));
    printf("sizeof(unsigned int) = %d\n", sizeof(unsigned int));
    printf("sizeof(short) = %d\n", sizeof(short));
    printf("sizeof(unsigned short) = %d\n", sizeof(unsigned short));
    printf("sizeof(char) = %d\n", sizeof(char));
    printf("sizeof(unsigned char) = %d\n", sizeof(unsigned char));
    printf("sizeof tab %d\n", sizeof(tab));
    printf("sizeof tab2 %d\n", sizeof tab2);
    tab[0] = 1;
    tab[1] = 2;
    tab[2] = 3;
    printf("%d %d %d\n", tab[0], tab[1], tab[2]);
    for(i=0;i<3;i++)
        for(j=0;j<2;j++)
            tab2[i][j] = 10 * i + j;
    for(i=0;i<3*2;i++) {
        printf(" %3d", ((int *)tab2)[i]);
    }
    printf("\n");
}

void expr_test()
{
    int a, b;
    a = 0;
    printf("%d\n", a += 1);
    printf("%d\n", a -= 2);
    printf("%d\n", a *= 31232132);
    printf("%d\n", a /= 4);
    printf("%d\n", a %= 20);
    printf("%d\n", a &= 6);
    printf("%d\n", a ^= 7);
    printf("%d\n", a |= 8);
    printf("%d\n", a >>= 3);
    printf("%d\n", a <<= 4);

    a = 22321;
    b = -22321;
    printf("%d\n", a + 1);
    printf("%d\n", a - 2);
    printf("%d\n", a * 312);
    printf("%d\n", a / 4);
    printf("%d\n", b / 4);
    printf("%d\n", (unsigned)b / 4);
    printf("%d\n", a % 20);
    printf("%d\n", b % 20);
    printf("%d\n", (unsigned)b % 20);
    printf("%d\n", a & 6);
    printf("%d\n", a ^ 7);
    printf("%d\n", a | 8);
    printf("%d\n", a >> 3);
    printf("%d\n", b >> 3);
    printf("%d\n", (unsigned)b >> 3);
    printf("%d\n", a << 4);
    printf("%d\n", ~a);
    printf("%d\n", -a);
    printf("%d\n", +a);

    printf("%d\n", 12 + 1);
    printf("%d\n", 12 - 2);
    printf("%d\n", 12 * 312);
    printf("%d\n", 12 / 4);
    printf("%d\n", 12 % 20);
    printf("%d\n", 12 & 6);
    printf("%d\n", 12 ^ 7);
    printf("%d\n", 12 | 8);
    printf("%d\n", 12 >> 2);
    printf("%d\n", 12 << 4);
    printf("%d\n", ~12);
    printf("%d\n", -12);
    printf("%d\n", +12);
    printf("%d %d %d %d\n", 
           isid('a'), 
           isid('g'), 
           isid('T'), 
           isid('('));
}

int isid(int c)
{
    return (c >= 'a' & c <= 'z') | (c >= 'A' & c <= 'Z') | c == '_';
}

/**********************/

int vstack[10], *vstack_ptr;

void vpush(int vt, int vc)
{
    *vstack_ptr++ = vt;
    *vstack_ptr++ = vc;
}

void vpop(int *ft, int *fc)
{
    *fc = *--vstack_ptr;
    *ft = *--vstack_ptr;
}

void expr2_test()
{
    int a, b;

    printf("expr2:\n");
    vstack_ptr = vstack;
    vpush(1432432, 2);
    vstack_ptr[-2] &= ~0xffffff80;
    vpop(&a, &b);
    printf("res= %d %d\n", a, b);
}

void constant_expr_test()
{
    int a;
    printf("constant_expr:\n");
    a = 3;
    printf("%d\n", a * 16);
    printf("%d\n", a * 1);
    printf("%d\n", a + 0);
}

int tab4[10];

void expr_ptr_test()
{
    int *p, *q;

    printf("expr_ptr:\n");
    p = tab4;
    q = tab4 + 10;
    printf("diff=%d\n", q - p);
    p++;
    printf("inc=%d\n", p - tab4);
    p--;
    printf("dec=%d\n", p - tab4);
    ++p;
    printf("inc=%d\n", p - tab4);
    --p;
    printf("dec=%d\n", p - tab4);
    printf("add=%d\n", p + 3 - tab4);
    printf("add=%d\n", 3 + p - tab4);
}

void expr_cmp_test()
{
    int a, b;
    printf("constant_expr:\n");
    a = -1;
    b = 1;
    printf("%d\n", a == a);
    printf("%d\n", a != a);

    printf("%d\n", a < b);
    printf("%d\n", a <= b);
    printf("%d\n", a <= a);
    printf("%d\n", b >= a);
    printf("%d\n", a >= a);
    printf("%d\n", b > a);

    printf("%d\n", (unsigned)a < b);
    printf("%d\n", (unsigned)a <= b);
    printf("%d\n", (unsigned)a <= a);
    printf("%d\n", (unsigned)b >= a);
    printf("%d\n", (unsigned)a >= a);
    printf("%d\n", (unsigned)b > a);
}

void struct_test()
{
    struct1 *s;
    union union2 u;

    printf("struct:\n");
    printf("sizes: %d %d %d %d\n",
           sizeof(struct struct1),
           sizeof(struct struct2),
           sizeof(union union1),
           sizeof(union union2));
    st1.f1 = 1;
    st1.f2 = 2;
    st1.f3 = 3;
    printf("st1: %d %d %d\n",
           st1.f1, st1.f2, st1.f3);
    st1.u.v1 = 1;
    st1.u.v2 = 2;
    printf("union1: %d\n", st1.u.v1);
    u.w1 = 1;
    u.w2 = 2;
    printf("union2: %d\n", u.w1);
    s = &st2;
    s->f1 = 3;
    s->f2 = 2;
    s->f3 = 1;
    printf("st2: %d %d %d\n",
           s->f1, s->f2, s->f3);
    printf("str_addr=%x\n", (int)st1.str - (int)&st1.f1);
}

/* XXX: depend on endianness */
void char_short_test()
{
    int var1, var2;

    printf("char_short:\n");

    var1 = 0x01020304;
    var2 = 0xfffefdfc;
    printf("s8=%d %d\n", 
           *(char *)&var1, *(char *)&var2);
    printf("u8=%d %d\n", 
           *(unsigned char *)&var1, *(unsigned char *)&var2);
    printf("s16=%d %d\n", 
           *(short *)&var1, *(short *)&var2);
    printf("u16=%d %d\n", 
           *(unsigned short *)&var1, *(unsigned short *)&var2);
    printf("s32=%d %d\n", 
           *(int *)&var1, *(int *)&var2);
    printf("u32=%d %d\n", 
           *(unsigned int *)&var1, *(unsigned int *)&var2);
    *(char *)&var1 = 0x08;
    printf("var1=%x\n", var1);
    *(short *)&var1 = 0x0809;
    printf("var1=%x\n", var1);
    *(int *)&var1 = 0x08090a0b;
    printf("var1=%x\n", var1);
}

/******************/

typedef struct Sym {
    int v;
    int t;
    int c;
    struct Sym *next;
    struct Sym *prev;
} Sym;

void bool_test()
{
    int *s, a, b;

    a = 0;
    s = (void*)0;
    printf("!s=%d\n", !s);

    if (!s || !s[0])
        a = 1;
    printf("a=%d\n", a);

    printf("a=%d %d %d\n", 0 || 0, 0 || 1, 1 || 1);
    printf("a=%d %d %d\n", 0 && 0, 0 && 1, 1 && 1);
    printf("a=%d %d\n", 1 ? 1 : 0, 0 ? 1 : 0);
#if 1 && 1
    printf("a1\n");
#endif
#if 1 || 0
    printf("a2\n");
#endif
#if 1 ? 0 : 1
    printf("a3\n");
#endif
#if 0 ? 0 : 1
    printf("a4\n");
#endif

    a = 4;
    printf("b=%d\n", a + (0 ? 1 : a / 2));

    /* test register spilling */
    a = 10;
    b = 10;
    a = (a + b) * ((a < b) ?
                   ((b - a) * (a - b)): a + b);
    printf("a=%d\n", a);
}


int cinit1 = 0;
int *cinit2 = (int []){3, 2, 1};

void compound_literal_test(void)
{
    int *p, i;
    char *q, *q3;

    printf("compound_test:\n");

    p = (int []){1, 2, 3};
    for(i=0;i<3;i++)
        printf(" %d", p[i]);
    printf("\n");

    for(i=0;i<3;i++)
        printf("%d", cinit2[i]);
    printf("\n");

    q = "tralala1";
    printf("q1=%s\n", q);

    q = (char *){ "tralala2" };
    printf("q2=%s\n", q);

    q3 = (char *){ q };
    printf("q3=%s\n", q3);

    q = (char []){ "tralala3" };
    printf("q4=%s\n", q);

#ifdef ALL_ISOC99
    p = (int []){1, 2, cinit1 + 3};
    for(i=0;i<3;i++)
        printf(" %d", p[i]);
    printf("\n");

    for(i=0;i<3;i++) {
        p = (int []){1, 2, 4 + i};
        printf("%d %d %d\n", 
               p[0],
               p[1],
               p[2]);
    }
#endif
}

/* K & R protos */

kr_func1(a, b)
{
    return a + b;
}

int kr_func2(a, b)
{
    return a + b;
}

kr_test()
{
    printf("kr_test:\n");
    printf("func1=%d\n", kr_func1(3, 4));
    printf("func2=%d\n", kr_func2(3, 4));
    return 0;
}

void num(int n)
{
    char *tab, *p;
    tab = (char*)malloc(20); 
    p = tab;
    while (1) {
        *p = 48 + (n % 10);
        p++;
        n = n / 10;
        if (n == 0)
            break;
    }
    while (p != tab) {
        p--;
        printf("%c", *p);
    }
    printf("\n");
}

/* structure assignment tests */
struct structa1 {
    int f1;
    char f2;
};

struct structa1 ssta1;

void struct_assign_test1(struct structa1 s1, int t)
{
    printf("%d %d %d\n", s1.f1, s1.f2, t);
}

struct structa1 struct_assign_test2(struct structa1 s1, int t)
{
    s1.f1 += t;
    s1.f2 -= t;
    return s1;
}

void struct_assign_test(void)
{
    struct structa1 lsta1, lsta2;
    
#if 0
    printf("struct_assign_test:\n");

    lsta1.f1 = 1;
    lsta1.f2 = 2;
    printf("%d %d\n", lsta1.f1, lsta1.f2);
    lsta2 = lsta1;
    printf("%d %d\n", lsta2.f1, lsta2.f2);
#else
    lsta2.f1 = 1;
    lsta2.f2 = 2;
#endif
    struct_assign_test1(lsta2, 3);
    
    printf("before call: %d %d\n", lsta2.f1, lsta2.f2);
    lsta2 = struct_assign_test2(lsta2, 4);
    printf("after call: %d %d\n", lsta2.f1, lsta2.f2);
}

/* casts to short/char */

void cast1(char a, short b, unsigned char c, unsigned short d)
{
    printf("%d %d %d %d\n", a, b, c, d);
}

char bcast;
short scast;

void cast_test()
{
    int a;
    char c;
    char tab[10];

    printf("cast_test:\n");
    a = 0xfffff;
    cast1(a, a, a, a);
    a = 0xffffe;
    printf("%d %d %d %d\n",
           (char)(a + 1),
           (short)(a + 1),
           (unsigned char)(a + 1),
           (unsigned short)(a + 1));
    printf("%d %d %d %d\n",
           (char)0xfffff,
           (short)0xfffff,
           (unsigned char)0xfffff,
           (unsigned short)0xfffff);

    a = (bcast = 128) + 1;
    printf("%d\n", a);
    a = (scast = 65536) + 1;
    printf("%d\n", a);
    
    printf("sizeof(c) = %d, sizeof((int)c) = %d\n", sizeof(c), sizeof((int)c));

    /* test implicit int casting for array accesses */
    c = 0;
    tab[1] = 2;
    tab[c] = 1;
    printf("%d %d\n", tab[0], tab[1]);
}

/* initializers tests */
struct structinit1 {
    int f1;
    char f2;
    short f3;
    int farray[3];
};

int sinit1 = 2;
int sinit2 = { 3 };
int sinit3[3] = { 1, 2, {{3}}, };
int sinit4[3][2] = { {1, 2}, {3, 4}, {5, 6} };
int sinit5[3][2] = { 1, 2, 3, 4, 5, 6 };
int sinit6[] = { 1, 2, 3 };
int sinit7[] = { [2] = 3, [0] = 1, 2 };
char sinit8[] = "hello" "trala";

struct structinit1 sinit9 = { 1, 2, 3 };
struct structinit1 sinit10 = { .f2 = 2, 3, .f1 = 1 };
struct structinit1 sinit11 = { .f2 = 2, 3, .f1 = 1, 
#ifdef ALL_ISOC99
                               .farray[0] = 10,
                               .farray[1] = 11,
                               .farray[2] = 12,
#endif
};

char *sinit12 = "hello world";
char *sinit13[] = {
    "test1",
    "test2",
    "test3",
};
char sinit14[10] = { "abc" };
int sinit15[3] = { sizeof(sinit15), 1, 2 };

void init_test(void)
{
    int linit1 = 2;
    int linit2 = { 3 };
    int linit4[3][2] = { {1, 2}, {3, 4}, {5, 6} };
    int linit6[] = { 1, 2, 3 };
    int i, j;
    char linit8[] = "hello" "trala";
    int linit12[10] = { 1, 2 };
    int linit13[10] = { 1, 2, [7] = 3, [3] = 4, };
    char linit14[10] = "abc";
    int linit15[10] = { linit1, linit1 + 1, [6] = linit1 + 2, };
    struct linit16 { int a1, a2, a3, a4; } linit16 = { 1, .a3 = 2 };
    int linit17 = sizeof(linit17);
    
    printf("init_test:\n");

    printf("sinit1=%d\n", sinit1);
    printf("sinit2=%d\n", sinit2);
    printf("sinit3=%d %d %d %d\n", 
           sizeof(sinit3),
           sinit3[0],
           sinit3[1],
           sinit3[2]
           );
    printf("sinit6=%d\n", sizeof(sinit6));
    printf("sinit7=%d %d %d %d\n", 
           sizeof(sinit7),
           sinit7[0],
           sinit7[1],
           sinit7[2]
           );
    printf("sinit8=%s\n", sinit8);
    printf("sinit9=%d %d %d\n", 
           sinit9.f1,
           sinit9.f2,
           sinit9.f3
           );
    printf("sinit10=%d %d %d\n", 
           sinit10.f1,
           sinit10.f2,
           sinit10.f3
           );
    printf("sinit11=%d %d %d %d %d %d\n", 
           sinit11.f1,
           sinit11.f2,
           sinit11.f3,
           sinit11.farray[0],
           sinit11.farray[1],
           sinit11.farray[2]
           );

    for(i=0;i<3;i++)
        for(j=0;j<2;j++)
            printf("[%d][%d] = %d %d %d\n", 
                   i, j, sinit4[i][j], sinit5[i][j], linit4[i][j]);
    printf("linit1=%d\n", linit1);
    printf("linit2=%d\n", linit2);
    printf("linit6=%d\n", sizeof(linit6));
    printf("linit8=%d %s\n", sizeof(linit8), linit8);

    printf("sinit12=%s\n", sinit12);
    printf("sinit13=%d %s %s %s\n",
           sizeof(sinit13), 
           sinit13[0],
           sinit13[1],
           sinit13[2]);
    printf("sinit14=%s\n", sinit14);

    for(i=0;i<10;i++) printf(" %d", linit12[i]);
    printf("\n");
    for(i=0;i<10;i++) printf(" %d", linit13[i]);
    printf("\n");
    for(i=0;i<10;i++) printf(" %d", linit14[i]);
    printf("\n");
    for(i=0;i<10;i++) printf(" %d", linit15[i]);
    printf("\n");
    printf("%d %d %d %d\n", 
           linit16.a1,
           linit16.a2,
           linit16.a3,
           linit16.a4);
    /* test that initialisation is done after variable declare */
    printf("linit17=%d\n", linit17);
    printf("sinit15=%d\n", sinit15[0]);
}

void switch_test()
{
    int i;

    for(i=0;i<15;i++) {
        switch(i) {
        case 0:
        case 1:
            printf("a");
            break;
        default:
            printf("%d", i);
            break;
        case 8 ... 12:
            printf("c");
            break;
        case 3:
            printf("b");
            break;
        }
    }
    printf("\n");
}

/* ISOC99 _Bool type */
void c99_bool_test(void)
{
#ifdef BOOL_ISOC99
    int a;
    _Bool b;

    printf("bool_test:\n");
    printf("sizeof(_Bool) = %d\n", sizeof(_Bool));
    a = 3;
    printf("cast: %d %d %d\n", (_Bool)10, (_Bool)0, (_Bool)a);
    b = 3;
    printf("b = %d\n", b);
    b++;
    printf("b = %d\n", b);
#endif
}

void bitfield_test(void)
{
    int a;
    struct sbf1 {
        int f1 : 3;
        int : 2;
        int f2 : 1;
        int : 0;
        int f3 : 5;
        int f4 : 7;
        unsigned int f5 : 7;
    } st1;
    printf("bitfield_test:");
    printf("sizeof(st1) = %d\n", sizeof(st1));

    st1.f1 = 3;
    st1.f2 = 1;
    st1.f3 = 15;
    a = 120;
    st1.f4 = a;
    st1.f5 = a;
    st1.f5++;
    printf("%d %d %d %d %d\n",
           st1.f1, st1.f2, st1.f3, st1.f4, st1.f5);
}

#define FTEST(prefix, type, fmt)\
void prefix ## cmp(type a, type b)\
{\
    printf("%d %d %d %d %d %d\n",\
           a == b,\
           a != b,\
           a < b,\
           a > b,\
           a >= b,\
           a <= b);\
    printf(fmt " " fmt " " fmt " " fmt " " fmt " " fmt " " fmt "\n",\
           a,\
           b,\
           a + b,\
           a - b,\
           a * b,\
           a / b,\
           -a);\
    printf(fmt "\n", ++a);\
    printf(fmt "\n", a++);\
    printf(fmt "\n", a);\
}\
void prefix ## fcast(type a)\
{\
    float fa;\
    double da;\
    long double la;\
    int ia;\
    unsigned int ua;\
    type b;\
    fa = a;\
    da = a;\
    la = a;\
    printf("ftof: %f %f %Lf\n", fa, da, la);\
    ia = (int)a;\
    ua = (unsigned int)a;\
    printf("ftoi: %d %u\n", ia, ua);\
    ia = -1234;\
    ua = 0x81234500;\
    b = ia;\
    printf("itof: " fmt "\n", b);\
    b = ua;\
    printf("utof: " fmt "\n", b);\
}\
\
void prefix ## test(void)\
{\
    printf("testing '%s'\n", #type);\
    prefix ## cmp(1, 2.5);\
    prefix ## cmp(2, 1.5);\
    prefix ## cmp(1, 1);\
    prefix ## fcast(234.6);\
    prefix ## fcast(-2334.6);\
}

FTEST(f, float, "%f")
FTEST(d, double, "%f")
FTEST(ld, long double, "%Lf")

double ftab1[3] = { 1.2, 3.4, -5.6 };


void float_test(void)
{
    float fa, fb;
    double da, db;
    int a;
    unsigned int b;

    printf("float_test:\n");
    printf("sizeof(float) = %d\n", sizeof(float));
    printf("sizeof(double) = %d\n", sizeof(double));
    printf("sizeof(long double) = %d\n", sizeof(long double));
    ftest();
    dtest();
    ldtest();
    printf("%f %f %f\n", ftab1[0], ftab1[1], ftab1[2]);
    printf("%f %f %f\n", 2.12, .5, 2.3e10);
    //    printf("%f %f %f\n", 0x1234p12, 0x1e23.23p10, 0x12dp-10);
    da = 123;
    printf("da=%f\n", da);
    fa = 123;
    printf("fa=%f\n", fa);
    a = 4000000000;
    da = a;
    printf("da = %f\n", da);
    b = 4000000000;
    db = b;
    printf("db = %f\n", db);
}

int fib(int n)
{
    if (n <= 2)
        return 1;
    else
        return fib(n-1) + fib(n-2);
}

void funcptr_test()
{
    void (*func)(int);
    int a;
    struct {
        int dummy;
        void (*func)(int);
    } st1;

    printf("funcptr:\n");
    func = &num;
    (*func)(12345);
    func = num;
    a = 1;
    a = 1;
    func(12345);
    /* more complicated pointer computation */
    st1.func = num;
    st1.func(12346);
    printf("sizeof1 = %d\n", sizeof(funcptr_test));
    printf("sizeof2 = %d\n", sizeof funcptr_test);
    printf("sizeof3 = %d\n", sizeof(&funcptr_test));
    printf("sizeof4 = %d\n", sizeof &funcptr_test);
}

void lloptest(long long a, long long b)
{
    unsigned long long ua, ub;

    ua = a;
    ub = b;
    /* arith */
    printf("arith: %Ld %Ld %Ld %Ld %Ld\n",
           a + b,
           a - b,
           a * b,
           a / b,
           a % b);
    
    /* binary */
    printf("bin: %Ld %Ld %Ld\n",
           a & b,
           a | b,
           a ^ b);

    /* tests */
    printf("test: %d %d %d %d %d %d\n",
           a == b,
           a != b,
           a < b,
           a > b,
           a >= b,
           a <= b);
    
    printf("utest: %d %d %d %d %d %d\n",
           ua == ub,
           ua != ub,
           ua < ub,
           ua > ub,
           ua >= ub,
           ua <= ub);

    /* arith2 */
    a++;
    b++;
    printf("arith2: %Ld %Ld\n", a, b);
    printf("arith2: %Ld %Ld\n", a++, b++);
    printf("arith2: %Ld %Ld\n", --a, --b);
    printf("arith2: %Ld %Ld\n", a, b);
}

void llshift(long long a, int b)
{
    printf("shift: %Ld %Ld %Ld\n",
           (unsigned long long)a >> b,
           a >> b,
           a << b);
    printf("shiftc: %Ld %Ld %Ld\n",
           (unsigned long long)a >> 3,
           a >> 3,
           a << 3);
    printf("shiftc: %Ld %Ld %Ld\n",
           (unsigned long long)a >> 35,
           a >> 35,
           a << 35);
}

void llfloat(void)
{
    float fa;
    double da;
    long double lda;
    long long la, lb, lc;
    unsigned long long ula, ulb, ulc;
    la = 0x12345678;
    ula = 0x72345678;
    la = (la << 20) | 0x12345;
    ula = ula << 33;
    printf("la=%Ld ula=%Lu\n", la, ula);

    fa = la;
    da = la;
    lda = la;
    printf("lltof: %f %f %Lf\n", fa, da, lda);

    la = fa;
    lb = da;
    lc = lda;
    printf("ftoll: %Ld %Ld %Ld\n", la, lb, lc);

    fa = ula;
    da = ula;
    lda = ula;
    printf("ulltof: %f %f %Lf\n", fa, da, lda);

    ula = fa;
    ulb = da;
    ulc = lda;
    printf("ftoull: %Lu %Lu %Lu\n", ula, ulb, ulc);
}

long long llfunc1(int a)
{
    return a;
}

/* currently not supported, except for typing */
void longlong_test(void)
{
    long long a, b, c;
    int ia;
    unsigned int ua;
    printf("longlong_test:\n");
    printf("sizeof(long long) = %d\n", sizeof(long long));
    ia = -1;
    ua = -2;
    a = ia;
    b = ua;
    printf("%Ld %Ld\n", a, b);
    printf("%Ld %Ld %Ld %Lx\n", 
           (long long)1, 
           (long long)-2,
           1LL,
           0x1234567812345679);
    a = llfunc1(-3);
    printf("%Ld\n", a);

    lloptest(1000, 23);
    lloptest(0xff, 0x1234);
    b = 0x72345678 << 10;
    lloptest(-3, b);
    llshift(0x123, 5);
    llshift(-23, 5);
    b = 0x72345678 << 10;
    llshift(b, 47);

    llfloat();
#if 1
    b = 0x12345678;
    a = -1;
    c = a + b;
    printf("%Lx\n", c);
#endif
}