modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/longlong.c (about)

     1  /* Source: PR 321 modified for test suite by Neil Booth 14 Jan 2001.  */
     2  
     3  typedef unsigned long long uint64;
     4  unsigned long pars;
     5  
     6  uint64 b[32];
     7  uint64 *r = b;
     8  
     9  void alpha_ep_extbl_i_eq_0()
    10  {
    11    unsigned int rb, ra, rc;
    12  
    13    rb  = (((unsigned long)(pars) >> 27)) & 0x1fUL;
    14    ra  = (((unsigned int)(pars) >> 5)) & 0x1fUL;
    15    rc  = (((unsigned int)(pars) >> 0)) & 0x1fUL;
    16    {
    17      uint64 temp = ((r[ra] >> ((r[rb] & 0x7) << 3)) & 0x00000000000000FFLL); 
    18      if (rc != 31) 
    19        r[rc] = temp;  
    20    }
    21  }
    22  
    23  int 
    24  main(void)
    25  {
    26    if (sizeof (uint64) == 8)
    27      {
    28        b[17] = 0x0000000000303882ULL; /* rb */
    29        b[2] = 0x534f4f4c494d000aULL; /* ra & rc */
    30  
    31        pars = 0x88000042;	/* 17, 2, 2 coded */
    32        alpha_ep_extbl_i_eq_0();
    33  
    34        if (b[2] != 0x4d)
    35  	abort ();
    36      }
    37  
    38    exit (0);
    39  }