1//===-- clzti2_test.c - Test __clzti2 -------------------------------------===//
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 __clzti2 for the compiler_rt library.
11//
12//===----------------------------------------------------------------------===//
13
14#include "int_lib.h"
15#include <stdio.h>
16
17#ifdef CRT_HAS_128BIT
18
19// Returns: the number of leading 0-bits
20
21// Precondition: a != 0
22
23si_int __clzti2(ti_int a);
24
25int test__clzti2(ti_int a, si_int expected)
26{
27    si_int x = __clzti2(a);
28    if (x != expected)
29    {
30        twords at;
31        at.all = a;
32        printf("error in __clzti2(0x%llX%.16llX) = %d, expected %d\n",
33               at.s.high, at.s.low, x, expected);
34    }
35    return x != expected;
36}
37
38char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
39
40#endif
41
42int main()
43{
44#ifdef CRT_HAS_128BIT
45    const int N = (int)(sizeof(ti_int) * CHAR_BIT);
46
47    if (test__clzti2(0x00000001, N-1))
48        return 1;
49    if (test__clzti2(0x00000002, N-2))
50        return 1;
51    if (test__clzti2(0x00000003, N-2))
52        return 1;
53    if (test__clzti2(0x00000004, N-3))
54        return 1;
55    if (test__clzti2(0x00000005, N-3))
56        return 1;
57    if (test__clzti2(0x0000000A, N-4))
58        return 1;
59    if (test__clzti2(0x1000000A, N*3/4+3))
60        return 1;
61    if (test__clzti2(0x2000000A, N*3/4+2))
62        return 1;
63    if (test__clzti2(0x6000000A, N*3/4+1))
64        return 1;
65    if (test__clzti2(0x8000000AuLL, N*3/4))
66        return 1;
67    if (test__clzti2(0x000005008000000AuLL, 85))
68        return 1;
69    if (test__clzti2(0x020005008000000AuLL, 70))
70        return 1;
71    if (test__clzti2(0x720005008000000AuLL, 65))
72        return 1;
73    if (test__clzti2(0x820005008000000AuLL, 64))
74        return 1;
75
76    if (test__clzti2(make_ti(0x0000000080000000LL, 0x8000000800000000LL), 32))
77        return 1;
78    if (test__clzti2(make_ti(0x0000000100000000LL, 0x8000000800000000LL), 31))
79        return 1;
80    if (test__clzti2(make_ti(0x1000000100000000LL, 0x8000000800000000LL), 3))
81        return 1;
82    if (test__clzti2(make_ti(0x7000000100000000LL, 0x8000000800000000LL), 1))
83        return 1;
84    if (test__clzti2(make_ti(0x8000000100000000LL, 0x8000000800000000LL), 0))
85        return 1;
86#else
87    printf("skipped\n");
88#endif
89   return 0;
90}
91