1  #define ASMNAME(cname)  ASMNAME2 (__USER_LABEL_PREFIX__, cname)
       2  #define ASMNAME2(prefix, cname) STRING (prefix) cname
       3  #define STRING(x)    #x
       4  
       5  typedef __SIZE_TYPE__ size_t;
       6  extern void abort (void);
       7  extern void *memcpy (void *, const void *, size_t)
       8    __asm (ASMNAME ("my_memcpy"));
       9  extern void bcopy (const void *, void *, size_t)
      10    __asm (ASMNAME ("my_bcopy"));
      11  extern void *memset (void *, int, size_t)
      12    __asm (ASMNAME ("my_memset"));
      13  extern void bzero (void *, size_t)
      14    __asm (ASMNAME ("my_bzero"));
      15  extern int memcmp (const void *, const void *, size_t);
      16  
      17  struct A { char c[32]; } a = { "foobar" };
      18  char x[64] = "foobar", y[64];
      19  int i = 39, j = 6, k = 4;
      20  
      21  extern int inside_main;
      22  
      23  void
      24  main_test (void)
      25  {
      26    struct A b = a;
      27    struct A c = { { 'x' } };
      28  
      29    inside_main = 1;
      30  
      31    if (memcmp (b.c, x, 32) || c.c[0] != 'x' || memcmp (c.c + 1, x + 32, 31))
      32      abort ();
      33    if (__builtin_memcpy (y, x, i) != y || memcmp (x, y, 64))
      34      abort ();
      35    if (memcpy (y + 6, x, j) != y + 6
      36        || memcmp (x, y, 6) || memcmp (x, y + 6, 58))
      37      abort ();
      38    if (__builtin_memset (y + 2, 'X', k) != y + 2
      39        || memcmp (y, "foXXXXfoobar", 13))
      40      abort ();
      41    bcopy (y + 1, y + 2, 6);
      42    if (memcmp (y, "fooXXXXfobar", 13))
      43      abort ();
      44    __builtin_bzero (y + 4, 2);
      45    if (memcmp (y, "fooX\0\0Xfobar", 13))
      46      abort ();
      47  }