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
23 si_int __clzti2(ti_int a);
24
test__clzti2(ti_int a,si_int expected)25 int 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
38 char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
39
40 #endif
41
main()42 int 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