1 //===-- ctzdi2_test.c - Test __ctzdi2 -------------------------------------===//
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 __ctzdi2 for the compiler_rt library.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "int_lib.h"
15 #include <stdio.h>
16
17 // Returns: the number of trailing 0-bits
18
19 // Precondition: a != 0
20
21 COMPILER_RT_ABI si_int __ctzdi2(di_int a);
22
test__ctzdi2(di_int a,si_int expected)23 int test__ctzdi2(di_int a, si_int expected)
24 {
25 si_int x = __ctzdi2(a);
26 if (x != expected)
27 printf("error in __ctzdi2(0x%llX) = %d, expected %d\n", a, x, expected);
28 return x != expected;
29 }
30
31 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
32
main()33 int main()
34 {
35 // if (test__ctzdi2(0x00000000, N)) // undefined
36 // return 1;
37 if (test__ctzdi2(0x00000001, 0))
38 return 1;
39 if (test__ctzdi2(0x00000002, 1))
40 return 1;
41 if (test__ctzdi2(0x00000003, 0))
42 return 1;
43 if (test__ctzdi2(0x00000004, 2))
44 return 1;
45 if (test__ctzdi2(0x00000005, 0))
46 return 1;
47 if (test__ctzdi2(0x0000000A, 1))
48 return 1;
49 if (test__ctzdi2(0x10000000, 28))
50 return 1;
51 if (test__ctzdi2(0x20000000, 29))
52 return 1;
53 if (test__ctzdi2(0x60000000, 29))
54 return 1;
55 if (test__ctzdi2(0x80000000uLL, 31))
56 return 1;
57 if (test__ctzdi2(0x0000050000000000uLL, 40))
58 return 1;
59 if (test__ctzdi2(0x0200080000000000uLL, 43))
60 return 1;
61 if (test__ctzdi2(0x7200000000000000uLL, 57))
62 return 1;
63 if (test__ctzdi2(0x8000000000000000uLL, 63))
64 return 1;
65
66 return 0;
67 }
68