| 1 | // RUN: %clang_builtins %s %librt -o %t && %run %t |
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| 2 | // REQUIRES: librt_has_ctzdi2 |
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| 3 | |
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| 4 | #include "int_lib.h" |
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| 5 | #include <stdio.h> |
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| 6 | |
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| 7 | // Returns: the number of trailing 0-bits |
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| 8 | |
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| 9 | // Precondition: a != 0 |
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| 10 | |
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| 11 | COMPILER_RT_ABI int __ctzdi2(di_int a); |
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| 12 | |
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| 13 | int test__ctzdi2(di_int a, int expected) |
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| 14 | { |
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| 15 | int x = __ctzdi2(a); |
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| 16 | if (x != expected) |
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| 17 | printf(format: "error in __ctzdi2(0x%llX) = %d, expected %d\n" , a, x, expected); |
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| 18 | return x != expected; |
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| 19 | } |
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| 20 | |
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| 21 | char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0}; |
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| 22 | |
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| 23 | int main() |
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| 24 | { |
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| 25 | // if (test__ctzdi2(0x00000000, N)) // undefined |
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| 26 | // return 1; |
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| 27 | if (test__ctzdi2(a: 0x00000001, expected: 0)) |
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| 28 | return 1; |
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| 29 | if (test__ctzdi2(a: 0x00000002, expected: 1)) |
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| 30 | return 1; |
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| 31 | if (test__ctzdi2(a: 0x00000003, expected: 0)) |
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| 32 | return 1; |
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| 33 | if (test__ctzdi2(a: 0x00000004, expected: 2)) |
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| 34 | return 1; |
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| 35 | if (test__ctzdi2(a: 0x00000005, expected: 0)) |
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| 36 | return 1; |
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| 37 | if (test__ctzdi2(a: 0x0000000A, expected: 1)) |
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| 38 | return 1; |
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| 39 | if (test__ctzdi2(a: 0x10000000, expected: 28)) |
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| 40 | return 1; |
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| 41 | if (test__ctzdi2(a: 0x20000000, expected: 29)) |
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| 42 | return 1; |
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| 43 | if (test__ctzdi2(a: 0x60000000, expected: 29)) |
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| 44 | return 1; |
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| 45 | if (test__ctzdi2(a: 0x80000000uLL, expected: 31)) |
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| 46 | return 1; |
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| 47 | if (test__ctzdi2(a: 0x0000050000000000uLL, expected: 40)) |
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| 48 | return 1; |
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| 49 | if (test__ctzdi2(a: 0x0200080000000000uLL, expected: 43)) |
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| 50 | return 1; |
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| 51 | if (test__ctzdi2(a: 0x7200000000000000uLL, expected: 57)) |
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| 52 | return 1; |
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| 53 | if (test__ctzdi2(a: 0x8000000000000000uLL, expected: 63)) |
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| 54 | return 1; |
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| 55 | |
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| 56 | return 0; |
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| 57 | } |
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| 58 | |
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