1*4684ddb6SLionel Sambuc //===-- clzdi2_test.c - Test __clzdi2 -------------------------------------===//
2*4684ddb6SLionel Sambuc //
3*4684ddb6SLionel Sambuc // The LLVM Compiler Infrastructure
4*4684ddb6SLionel Sambuc //
5*4684ddb6SLionel Sambuc // This file is dual licensed under the MIT and the University of Illinois Open
6*4684ddb6SLionel Sambuc // Source Licenses. See LICENSE.TXT for details.
7*4684ddb6SLionel Sambuc //
8*4684ddb6SLionel Sambuc //===----------------------------------------------------------------------===//
9*4684ddb6SLionel Sambuc //
10*4684ddb6SLionel Sambuc // This file tests __clzdi2 for the compiler_rt library.
11*4684ddb6SLionel Sambuc //
12*4684ddb6SLionel Sambuc //===----------------------------------------------------------------------===//
13*4684ddb6SLionel Sambuc
14*4684ddb6SLionel Sambuc #include "int_lib.h"
15*4684ddb6SLionel Sambuc #include <stdio.h>
16*4684ddb6SLionel Sambuc
17*4684ddb6SLionel Sambuc // Returns: the number of leading 0-bits
18*4684ddb6SLionel Sambuc
19*4684ddb6SLionel Sambuc // Precondition: a != 0
20*4684ddb6SLionel Sambuc
21*4684ddb6SLionel Sambuc si_int __clzdi2(di_int a);
22*4684ddb6SLionel Sambuc
test__clzdi2(di_int a,si_int expected)23*4684ddb6SLionel Sambuc int test__clzdi2(di_int a, si_int expected)
24*4684ddb6SLionel Sambuc {
25*4684ddb6SLionel Sambuc si_int x = __clzdi2(a);
26*4684ddb6SLionel Sambuc if (x != expected)
27*4684ddb6SLionel Sambuc printf("error in __clzdi2(0x%llX) = %d, expected %d\n", a, x, expected);
28*4684ddb6SLionel Sambuc return x != expected;
29*4684ddb6SLionel Sambuc }
30*4684ddb6SLionel Sambuc
31*4684ddb6SLionel Sambuc char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
32*4684ddb6SLionel Sambuc
main()33*4684ddb6SLionel Sambuc int main()
34*4684ddb6SLionel Sambuc {
35*4684ddb6SLionel Sambuc const int N = (int)(sizeof(di_int) * CHAR_BIT);
36*4684ddb6SLionel Sambuc // if (test__clzdi2(0x00000000, N)) // undefined
37*4684ddb6SLionel Sambuc // return 1;
38*4684ddb6SLionel Sambuc if (test__clzdi2(0x00000001, N-1))
39*4684ddb6SLionel Sambuc return 1;
40*4684ddb6SLionel Sambuc if (test__clzdi2(0x00000002, N-2))
41*4684ddb6SLionel Sambuc return 1;
42*4684ddb6SLionel Sambuc if (test__clzdi2(0x00000003, N-2))
43*4684ddb6SLionel Sambuc return 1;
44*4684ddb6SLionel Sambuc if (test__clzdi2(0x00000004, N-3))
45*4684ddb6SLionel Sambuc return 1;
46*4684ddb6SLionel Sambuc if (test__clzdi2(0x00000005, N-3))
47*4684ddb6SLionel Sambuc return 1;
48*4684ddb6SLionel Sambuc if (test__clzdi2(0x0000000A, N-4))
49*4684ddb6SLionel Sambuc return 1;
50*4684ddb6SLionel Sambuc if (test__clzdi2(0x1000000A, N/2+3))
51*4684ddb6SLionel Sambuc return 1;
52*4684ddb6SLionel Sambuc if (test__clzdi2(0x2000000A, N/2+2))
53*4684ddb6SLionel Sambuc return 1;
54*4684ddb6SLionel Sambuc if (test__clzdi2(0x6000000A, N/2+1))
55*4684ddb6SLionel Sambuc return 1;
56*4684ddb6SLionel Sambuc if (test__clzdi2(0x8000000AuLL, N/2))
57*4684ddb6SLionel Sambuc return 1;
58*4684ddb6SLionel Sambuc if (test__clzdi2(0x000005008000000AuLL, 21))
59*4684ddb6SLionel Sambuc return 1;
60*4684ddb6SLionel Sambuc if (test__clzdi2(0x020005008000000AuLL, 6))
61*4684ddb6SLionel Sambuc return 1;
62*4684ddb6SLionel Sambuc if (test__clzdi2(0x720005008000000AuLL, 1))
63*4684ddb6SLionel Sambuc return 1;
64*4684ddb6SLionel Sambuc if (test__clzdi2(0x820005008000000AuLL, 0))
65*4684ddb6SLionel Sambuc return 1;
66*4684ddb6SLionel Sambuc
67*4684ddb6SLionel Sambuc return 0;
68*4684ddb6SLionel Sambuc }
69