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
test__ffsdi2(di_int a,si_int expected)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
main()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 }
67