| Daniel Dunbar | b3a6901 | 2009-06-26 16:47:03 +0000 | [diff] [blame] | 1 | //===-- clzdi2_test.c - Test __clzdi2 -------------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| Howard Hinnant | 9ad441f | 2010-11-16 22:13:33 +0000 | [diff] [blame] | 5 | // This file is dual licensed under the MIT and the University of Illinois Open |
| 6 | // Source Licenses. See LICENSE.TXT for details. |
| Daniel Dunbar | b3a6901 | 2009-06-26 16:47:03 +0000 | [diff] [blame] | 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 | |
| 21 | si_int __clzdi2(di_int a); |
| 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 | } |