1 //===-- ffsti2_test.c - Test __ffsti2 -------------------------------------===//
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 __ffsti2 for the compiler_rt library.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "int_lib.h"
15 #include <stdio.h>
16 
17 #ifdef CRT_HAS_128BIT
18 
19 // Returns: the index of the least significant 1-bit in a, or
20 // the value zero if a is zero. The least significant bit is index one.
21 
22 si_int __ffsti2(ti_int a);
23 
test__ffsti2(ti_int a,si_int expected)24 int test__ffsti2(ti_int a, si_int expected)
25 {
26     si_int x = __ffsti2(a);
27     if (x != expected)
28     {
29         twords at;
30         at.all = a;
31         printf("error in __ffsti2(0x%llX%.16llX) = %d, expected %d\n",
32                at.s.high, at.s.low, x, expected);
33     }
34     return x != expected;
35 }
36 
37 char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
38 
39 #endif
40 
main()41 int main()
42 {
43 #ifdef CRT_HAS_128BIT
44     if (test__ffsti2(0x00000000, 0))
45         return 1;
46     if (test__ffsti2(0x00000001, 1))
47         return 1;
48     if (test__ffsti2(0x00000002, 2))
49         return 1;
50     if (test__ffsti2(0x00000003, 1))
51         return 1;
52     if (test__ffsti2(0x00000004, 3))
53         return 1;
54     if (test__ffsti2(0x00000005, 1))
55         return 1;
56     if (test__ffsti2(0x0000000A, 2))
57         return 1;
58     if (test__ffsti2(0x10000000, 29))
59         return 1;
60     if (test__ffsti2(0x20000000, 30))
61         return 1;
62     if (test__ffsti2(0x60000000, 30))
63         return 1;
64     if (test__ffsti2(0x80000000uLL, 32))
65         return 1;
66     if (test__ffsti2(0x0000050000000000uLL, 41))
67         return 1;
68     if (test__ffsti2(0x0200080000000000uLL, 44))
69         return 1;
70     if (test__ffsti2(0x7200000000000000uLL, 58))
71         return 1;
72     if (test__ffsti2(0x8000000000000000uLL, 64))
73         return 1;
74     if (test__ffsti2(make_ti(0x8000000800000000uLL, 0), 100))
75         return 1;
76     if (test__ffsti2(make_ti(0x8000000000000000uLL, 0), 128))
77         return 1;
78 
79 #else
80     printf("skipped\n");
81 #endif
82    return 0;
83 }
84