| 1 | // RUN: %clang_builtins %s %librt -o %t && %run %t |
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| 2 | // REQUIRES: librt_has_ffsti2 |
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| 3 | // REQUIRES: int128 |
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| 4 | |
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| 5 | #include "int_lib.h" |
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| 6 | #include <stdio.h> |
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| 7 | |
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| 8 | #ifdef CRT_HAS_128BIT |
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| 9 | |
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| 10 | // Returns: the index of the least significant 1-bit in a, or |
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| 11 | // the value zero if a is zero. The least significant bit is index one. |
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| 12 | |
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| 13 | COMPILER_RT_ABI int __ffsti2(ti_int a); |
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| 14 | |
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| 15 | int test__ffsti2(ti_int a, int expected) |
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| 16 | { |
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| 17 | int x = __ffsti2(a); |
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| 18 | if (x != expected) |
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| 19 | { |
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| 20 | twords at; |
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| 21 | at.all = a; |
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| 22 | printf(format: "error in __ffsti2(0x%llX%.16llX) = %d, expected %d\n" , |
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| 23 | at.s.high, at.s.low, x, expected); |
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| 24 | } |
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| 25 | return x != expected; |
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| 26 | } |
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| 27 | |
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| 28 | char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0}; |
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| 29 | |
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| 30 | #endif |
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| 31 | |
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| 32 | int main() |
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| 33 | { |
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| 34 | #ifdef CRT_HAS_128BIT |
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| 35 | if (test__ffsti2(a: 0x00000000, expected: 0)) |
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| 36 | return 1; |
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| 37 | if (test__ffsti2(a: 0x00000001, expected: 1)) |
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| 38 | return 1; |
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| 39 | if (test__ffsti2(a: 0x00000002, expected: 2)) |
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| 40 | return 1; |
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| 41 | if (test__ffsti2(a: 0x00000003, expected: 1)) |
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| 42 | return 1; |
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| 43 | if (test__ffsti2(a: 0x00000004, expected: 3)) |
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| 44 | return 1; |
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| 45 | if (test__ffsti2(a: 0x00000005, expected: 1)) |
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| 46 | return 1; |
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| 47 | if (test__ffsti2(a: 0x0000000A, expected: 2)) |
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| 48 | return 1; |
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| 49 | if (test__ffsti2(a: 0x10000000, expected: 29)) |
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| 50 | return 1; |
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| 51 | if (test__ffsti2(a: 0x20000000, expected: 30)) |
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| 52 | return 1; |
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| 53 | if (test__ffsti2(a: 0x60000000, expected: 30)) |
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| 54 | return 1; |
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| 55 | if (test__ffsti2(a: 0x80000000uLL, expected: 32)) |
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| 56 | return 1; |
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| 57 | if (test__ffsti2(a: 0x0000050000000000uLL, expected: 41)) |
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| 58 | return 1; |
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| 59 | if (test__ffsti2(a: 0x0200080000000000uLL, expected: 44)) |
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| 60 | return 1; |
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| 61 | if (test__ffsti2(a: 0x7200000000000000uLL, expected: 58)) |
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| 62 | return 1; |
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| 63 | if (test__ffsti2(a: 0x8000000000000000uLL, expected: 64)) |
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| 64 | return 1; |
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| 65 | if (test__ffsti2(a: make_ti(h: 0x8000000800000000uLL, l: 0), expected: 100)) |
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| 66 | return 1; |
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| 67 | if (test__ffsti2(a: make_ti(h: 0x8000000000000000uLL, l: 0), expected: 128)) |
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| 68 | return 1; |
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| 69 | |
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| 70 | #else |
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| 71 | printf("skipped\n" ); |
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| 72 | #endif |
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| 73 | return 0; |
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| 74 | } |
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| 75 | |
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