1// RUN: %clang_builtins %s %librt -o %t && %run %t
2// REQUIRES: librt_has_ffsdi2
3
4#include "int_lib.h"
5#include <stdio.h>
6
7// Returns: the index of the least significant 1-bit in a, or
8// the value zero if a is zero. The least significant bit is index one.
9
10COMPILER_RT_ABI int __ffsdi2(di_int a);
11
12int test__ffsdi2(di_int a, int expected)
13{
14 int x = __ffsdi2(a);
15 if (x != expected)
16 printf("error in __ffsdi2(0x%llX) = %d, expected %d\n", a, x, expected);
17 return x != expected;
18}
19
20char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
21
22int main()
23{
24 if (test__ffsdi2(0x00000000, 0))
25 return 1;
26 if (test__ffsdi2(0x00000001, 1))
27 return 1;
28 if (test__ffsdi2(0x00000002, 2))
29 return 1;
30 if (test__ffsdi2(0x00000003, 1))
31 return 1;
32 if (test__ffsdi2(0x00000004, 3))
33 return 1;
34 if (test__ffsdi2(0x00000005, 1))
35 return 1;
36 if (test__ffsdi2(0x0000000A, 2))
37 return 1;
38 if (test__ffsdi2(0x10000000, 29))
39 return 1;
40 if (test__ffsdi2(0x20000000, 30))
41 return 1;
42 if (test__ffsdi2(0x60000000, 30))
43 return 1;
44 if (test__ffsdi2(0x80000000uLL, 32))
45 return 1;
46 if (test__ffsdi2(0x0000050000000000uLL, 41))
47 return 1;
48 if (test__ffsdi2(0x0200080000000000uLL, 44))
49 return 1;
50 if (test__ffsdi2(0x7200000000000000uLL, 58))
51 return 1;
52 if (test__ffsdi2(0x8000000000000000uLL, 64))
53 return 1;
54
55 return 0;
56}
57