1  /* Copyright (C) 1994-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <stdlib.h>
      19  #include <stdio.h>
      20  #include <string.h>
      21  #include <support/check.h>
      22  
      23  void try (const char *name, long long int param, int value, int expected)
      24  {
      25    if (value != expected)
      26      {
      27        printf ("%s(%#llx) expected %d got %d\n",
      28  	      name, param, expected, value);
      29        support_record_failure ();
      30      }
      31    else
      32      printf ("%s(%#llx) as expected %d\n", name, param, value);
      33  }
      34  
      35  int
      36  do_test (void)
      37  {
      38    int i;
      39  
      40  #define TEST(fct, type) \
      41    try (#fct, 0, fct ((type) 0), 0);					      \
      42    for (i=0 ; i < 8 * sizeof (type); i++)				      \
      43      try (#fct, 1ll << i, fct (((type) 1) << i), i + 1);			      \
      44    for (i=0 ; i < 8 * sizeof (type) ; i++)				      \
      45      try (#fct, (~((type) 0) >> i) << i, fct ((~((type) 0) >> i) << i), i + 1);\
      46    try (#fct, 0x80008000, fct ((type) 0x80008000), 16)
      47  
      48    TEST (ffs, int);
      49    TEST (ffsl, long int);
      50    TEST (ffsll, long long int);
      51  
      52    return 0;
      53  }
      54  
      55  #include <support/test-driver.c>