1218822Sdim//===-- ctzdi2_test.c - Test __ctzdi2 -------------------------------------===//
238889Sjdp//
3218822Sdim//                     The LLVM Compiler Infrastructure
4218822Sdim//
5218822Sdim// This file is dual licensed under the MIT and the University of Illinois Open
6218822Sdim// Source Licenses. See LICENSE.TXT for details.
7218822Sdim//
838889Sjdp//===----------------------------------------------------------------------===//
9218822Sdim//
10218822Sdim// This file tests __ctzdi2 for the compiler_rt library.
11218822Sdim//
12218822Sdim//===----------------------------------------------------------------------===//
1338889Sjdp
14218822Sdim#include "int_lib.h"
15218822Sdim#include <stdio.h>
16218822Sdim
17218822Sdim// Returns: the number of trailing 0-bits
18218822Sdim
1938889Sjdp// Precondition: a != 0
20218822Sdim
21218822SdimCOMPILER_RT_ABI si_int __ctzdi2(di_int a);
22218822Sdim
23218822Sdimint test__ctzdi2(di_int a, si_int expected)
24218822Sdim{
25218822Sdim    si_int x = __ctzdi2(a);
26218822Sdim    if (x != expected)
27218822Sdim        printf("error in __ctzdi2(0x%llX) = %d, expected %d\n", a, x, expected);
28218822Sdim    return x != expected;
29218822Sdim}
30218822Sdim
31218822Sdimchar assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
32218822Sdim
33218822Sdimint main()
34218822Sdim{
35218822Sdim//    if (test__ctzdi2(0x00000000, N))  // undefined
36218822Sdim//        return 1;
37218822Sdim    if (test__ctzdi2(0x00000001, 0))
38218822Sdim        return 1;
39218822Sdim    if (test__ctzdi2(0x00000002, 1))
40218822Sdim        return 1;
41218822Sdim    if (test__ctzdi2(0x00000003, 0))
42218822Sdim        return 1;
43218822Sdim    if (test__ctzdi2(0x00000004, 2))
44218822Sdim        return 1;
45218822Sdim    if (test__ctzdi2(0x00000005, 0))
46218822Sdim        return 1;
47218822Sdim    if (test__ctzdi2(0x0000000A, 1))
48218822Sdim        return 1;
49218822Sdim    if (test__ctzdi2(0x10000000, 28))
50218822Sdim        return 1;
51218822Sdim    if (test__ctzdi2(0x20000000, 29))
52218822Sdim        return 1;
53218822Sdim    if (test__ctzdi2(0x60000000, 29))
54218822Sdim        return 1;
55218822Sdim    if (test__ctzdi2(0x80000000uLL, 31))
56218822Sdim        return 1;
57218822Sdim    if (test__ctzdi2(0x0000050000000000uLL, 40))
58218822Sdim        return 1;
59218822Sdim    if (test__ctzdi2(0x0200080000000000uLL, 43))
60218822Sdim        return 1;
61218822Sdim    if (test__ctzdi2(0x7200000000000000uLL, 57))
62218822Sdim        return 1;
63218822Sdim    if (test__ctzdi2(0x8000000000000000uLL, 63))
64218822Sdim        return 1;
65218822Sdim
66218822Sdim   return 0;
67218822Sdim}
68218822Sdim