1 // RUN: %clang_builtins %s %librt -o %t && %run %t
2 // REQUIRES: int128
3 //===-- clzti2_test.c - Test __clzti2 -------------------------------------===//
4 //
5 // The LLVM Compiler Infrastructure
6 //
7 // This file is dual licensed under the MIT and the University of Illinois Open
8 // Source Licenses. See LICENSE.TXT for details.
9 //
10 //===----------------------------------------------------------------------===//
11 //
12 // This file tests __clzti2 for the compiler_rt library.
13 //
14 //===----------------------------------------------------------------------===//
15
16 #include "int_lib.h"
17 #include <stdio.h>
18
19 #ifdef CRT_HAS_128BIT
20
21 // Returns: the number of leading 0-bits
22
23 // Precondition: a != 0
24
25 COMPILER_RT_ABI si_int __clzti2(ti_int a);
26
test__clzti2(ti_int a,si_int expected)27 int test__clzti2(ti_int a, si_int expected)
28 {
29 si_int x = __clzti2(a);
30 if (x != expected)
31 {
32 twords at;
33 at.all = a;
34 printf("error in __clzti2(0x%llX%.16llX) = %d, expected %d\n",
35 at.s.high, at.s.low, x, expected);
36 }
37 return x != expected;
38 }
39
40 char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
41
42 #endif
43
main()44 int main()
45 {
46 #ifdef CRT_HAS_128BIT
47 const int N = (int)(sizeof(ti_int) * CHAR_BIT);
48
49 if (test__clzti2(0x00000001, N-1))
50 return 1;
51 if (test__clzti2(0x00000002, N-2))
52 return 1;
53 if (test__clzti2(0x00000003, N-2))
54 return 1;
55 if (test__clzti2(0x00000004, N-3))
56 return 1;
57 if (test__clzti2(0x00000005, N-3))
58 return 1;
59 if (test__clzti2(0x0000000A, N-4))
60 return 1;
61 if (test__clzti2(0x1000000A, N*3/4+3))
62 return 1;
63 if (test__clzti2(0x2000000A, N*3/4+2))
64 return 1;
65 if (test__clzti2(0x6000000A, N*3/4+1))
66 return 1;
67 if (test__clzti2(0x8000000AuLL, N*3/4))
68 return 1;
69 if (test__clzti2(0x000005008000000AuLL, 85))
70 return 1;
71 if (test__clzti2(0x020005008000000AuLL, 70))
72 return 1;
73 if (test__clzti2(0x720005008000000AuLL, 65))
74 return 1;
75 if (test__clzti2(0x820005008000000AuLL, 64))
76 return 1;
77
78 if (test__clzti2(make_ti(0x0000000080000000LL, 0x8000000800000000LL), 32))
79 return 1;
80 if (test__clzti2(make_ti(0x0000000100000000LL, 0x8000000800000000LL), 31))
81 return 1;
82 if (test__clzti2(make_ti(0x1000000100000000LL, 0x8000000800000000LL), 3))
83 return 1;
84 if (test__clzti2(make_ti(0x7000000100000000LL, 0x8000000800000000LL), 1))
85 return 1;
86 if (test__clzti2(make_ti(0x8000000100000000LL, 0x8000000800000000LL), 0))
87 return 1;
88 #else
89 printf("skipped\n");
90 #endif
91 return 0;
92 }
93