1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
// RUN: %clang_builtins %s %librt -o %t && %run %t
//===-- clzdi2_test.c - Test __clzdi2 -------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file tests __clzdi2 for the compiler_rt library.
//
//===----------------------------------------------------------------------===//
#include "int_lib.h"
#include <stdio.h>
// Returns: the number of leading 0-bits
// Precondition: a != 0
COMPILER_RT_ABI si_int __clzdi2(di_int a);
int test__clzdi2(di_int a, si_int expected)
{
si_int x = __clzdi2(a);
if (x != expected)
printf("error in __clzdi2(0x%llX) = %d, expected %d\n", a, x, expected);
return x != expected;
}
char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
int main()
{
const int N = (int)(sizeof(di_int) * CHAR_BIT);
// if (test__clzdi2(0x00000000, N)) // undefined
// return 1;
if (test__clzdi2(0x00000001, N-1))
return 1;
if (test__clzdi2(0x00000002, N-2))
return 1;
if (test__clzdi2(0x00000003, N-2))
return 1;
if (test__clzdi2(0x00000004, N-3))
return 1;
if (test__clzdi2(0x00000005, N-3))
return 1;
if (test__clzdi2(0x0000000A, N-4))
return 1;
if (test__clzdi2(0x1000000A, N/2+3))
return 1;
if (test__clzdi2(0x2000000A, N/2+2))
return 1;
if (test__clzdi2(0x6000000A, N/2+1))
return 1;
if (test__clzdi2(0x8000000AuLL, N/2))
return 1;
if (test__clzdi2(0x000005008000000AuLL, 21))
return 1;
if (test__clzdi2(0x020005008000000AuLL, 6))
return 1;
if (test__clzdi2(0x720005008000000AuLL, 1))
return 1;
if (test__clzdi2(0x820005008000000AuLL, 0))
return 1;
return 0;
}
|
