sys/external/bsd/compiler_rt/dist/test/Unit/ffsdi2_test.c

   1 //===-- ffsdi2_test.c - Test __ffsdi2 -------------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is dual licensed under the MIT and the University of Illinois Open
   6 // Source Licenses. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file tests __ffsdi2 for the compiler_rt library.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "int_lib.h"
  15 #include <stdio.h>
  16
  17 // Returns: the index of the least significant 1-bit in a, or
  18 // the value zero if a is zero. The least significant bit is index one.
  19
  20 si_int __ffsdi2(di_int a);
  21
  22 int test__ffsdi2(di_int a, si_int expected)
  23 {
  24     si_int x = __ffsdi2(a);
  25     if (x != expected)
  26         printf("error in __ffsdi2(0x%llX) = %d, expected %d\n", a, x, expected);
  27     return x != expected;
  28 }
  29
  30 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
  31
  32 int main()
  33 {
  34     if (test__ffsdi2(0x00000000, 0))
  35         return 1;
  36     if (test__ffsdi2(0x00000001, 1))
  37         return 1;
  38     if (test__ffsdi2(0x00000002, 2))
  39         return 1;
  40     if (test__ffsdi2(0x00000003, 1))
  41         return 1;
  42     if (test__ffsdi2(0x00000004, 3))
  43         return 1;
  44     if (test__ffsdi2(0x00000005, 1))
  45         return 1;
  46     if (test__ffsdi2(0x0000000A, 2))
  47         return 1;
  48     if (test__ffsdi2(0x10000000, 29))
  49         return 1;
  50     if (test__ffsdi2(0x20000000, 30))
  51         return 1;
  52     if (test__ffsdi2(0x60000000, 30))
  53         return 1;
  54     if (test__ffsdi2(0x80000000uLL, 32))
  55         return 1;
  56     if (test__ffsdi2(0x0000050000000000uLL, 41))
  57         return 1;
  58     if (test__ffsdi2(0x0200080000000000uLL, 44))
  59         return 1;
  60     if (test__ffsdi2(0x7200000000000000uLL, 58))
  61         return 1;
  62     if (test__ffsdi2(0x8000000000000000uLL, 64))
  63         return 1;
  64
  65    return 0;
  66 }