| Daniel Dunbar | fd08999 | 2009-06-26 16:47:03 +0000 | [diff] [blame^] | 1 | //===-- ffsdi2_test.c - Test __ffsdi2 -------------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file tests __ffsdi2 for the compiler_rt library. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "int_lib.h" |
| 15 | #include <stdio.h> |
| 16 | |
| 17 | // Returns: the index of the least significant 1-bit in a, or |
| 18 | // the value zero if a is zero. The least significant bit is index one. |
| 19 | |
| 20 | si_int __ffsdi2(di_int a); |
| 21 | |
| 22 | int test__ffsdi2(di_int a, si_int expected) |
| 23 | { |
| 24 | si_int x = __ffsdi2(a); |
| 25 | if (x != expected) |
| 26 | printf("error in __ffsdi2(0x%llX) = %d, expected %d\n", a, x, expected); |
| 27 | return x != expected; |
| 28 | } |
| 29 | |
| 30 | char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0}; |
| 31 | |
| 32 | int main() |
| 33 | { |
| 34 | if (test__ffsdi2(0x00000000, 0)) |
| 35 | return 1; |
| 36 | if (test__ffsdi2(0x00000001, 1)) |
| 37 | return 1; |
| 38 | if (test__ffsdi2(0x00000002, 2)) |
| 39 | return 1; |
| 40 | if (test__ffsdi2(0x00000003, 1)) |
| 41 | return 1; |
| 42 | if (test__ffsdi2(0x00000004, 3)) |
| 43 | return 1; |
| 44 | if (test__ffsdi2(0x00000005, 1)) |
| 45 | return 1; |
| 46 | if (test__ffsdi2(0x0000000A, 2)) |
| 47 | return 1; |
| 48 | if (test__ffsdi2(0x10000000, 29)) |
| 49 | return 1; |
| 50 | if (test__ffsdi2(0x20000000, 30)) |
| 51 | return 1; |
| 52 | if (test__ffsdi2(0x60000000, 30)) |
| 53 | return 1; |
| 54 | if (test__ffsdi2(0x80000000uLL, 32)) |
| 55 | return 1; |
| 56 | if (test__ffsdi2(0x0000050000000000uLL, 41)) |
| 57 | return 1; |
| 58 | if (test__ffsdi2(0x0200080000000000uLL, 44)) |
| 59 | return 1; |
| 60 | if (test__ffsdi2(0x7200000000000000uLL, 58)) |
| 61 | return 1; |
| 62 | if (test__ffsdi2(0x8000000000000000uLL, 64)) |
| 63 | return 1; |
| 64 | |
| 65 | return 0; |
| 66 | } |