1//===-- ffsdi2_test.c - Test __ffsdi2 -------------------------------------===//
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 __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
20si_int __ffsdi2(di_int a);
21
22int 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
30char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
31
32int 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