1//===-- ffsti2_test.c - Test __ffsti2 -------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. 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
22si_int __ffsti2(ti_int a);
23
24int 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
37char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
38
39#endif
40
41int 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#endif
80   return 0;
81}
82