projects / rustc.git / blame
| Commit | Line | Data |
|---|---|---|
| 1a4d82fc JJ |
1 | //===-- clzdi2_test.c - Test __clzdi2 -------------------------------------===// |
| 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 __clzdi2 for the compiler_rt library. | |
| 11 | // | |
| 12 | //===----------------------------------------------------------------------===// | |
| 13 | ||
| 14 | #include "int_lib.h" | |
| 15 | #include <stdio.h> | |
| 16 | ||
| 17 | // Returns: the number of leading 0-bits | |
| 18 | ||
| 19 | // Precondition: a != 0 | |
| 20 | ||
| 92a42be0 | 21 | COMPILER_RT_ABI si_int __clzdi2(di_int a); |
| 1a4d82fc JJ |
22 | |
| 23 | int test__clzdi2(di_int a, si_int expected) | |
| 24 | { | |
| 25 | si_int x = __clzdi2(a); | |
| 26 | if (x != expected) | |
| 27 | printf("error in __clzdi2(0x%llX) = %d, expected %d\n", a, x, expected); | |
| 28 | return x != expected; | |
| 29 | } | |
| 30 | ||
| 31 | char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0}; | |
| 32 | ||
| 33 | int main() | |
| 34 | { | |
| 35 | const int N = (int)(sizeof(di_int) * CHAR_BIT); | |
| 36 | // if (test__clzdi2(0x00000000, N)) // undefined | |
| 37 | // return 1; | |
| 38 | if (test__clzdi2(0x00000001, N-1)) | |
| 39 | return 1; | |
| 40 | if (test__clzdi2(0x00000002, N-2)) | |
| 41 | return 1; | |
| 42 | if (test__clzdi2(0x00000003, N-2)) | |
| 43 | return 1; | |
| 44 | if (test__clzdi2(0x00000004, N-3)) | |
| 45 | return 1; | |
| 46 | if (test__clzdi2(0x00000005, N-3)) | |
| 47 | return 1; | |
| 48 | if (test__clzdi2(0x0000000A, N-4)) | |
| 49 | return 1; | |
| 50 | if (test__clzdi2(0x1000000A, N/2+3)) | |
| 51 | return 1; | |
| 52 | if (test__clzdi2(0x2000000A, N/2+2)) | |
| 53 | return 1; | |
| 54 | if (test__clzdi2(0x6000000A, N/2+1)) | |
| 55 | return 1; | |
| 56 | if (test__clzdi2(0x8000000AuLL, N/2)) | |
| 57 | return 1; | |
| 58 | if (test__clzdi2(0x000005008000000AuLL, 21)) | |
| 59 | return 1; | |
| 60 | if (test__clzdi2(0x020005008000000AuLL, 6)) | |
| 61 | return 1; | |
| 62 | if (test__clzdi2(0x720005008000000AuLL, 1)) | |
| 63 | return 1; | |
| 64 | if (test__clzdi2(0x820005008000000AuLL, 0)) | |
| 65 | return 1; | |
| 66 | ||
| 67 | return 0; | |
| 68 | } |