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 #if __x86_64
15
16 #include "int_lib.h"
17 #include <stdio.h>
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 #if __x86_64
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