| 1 | // RUN: %clang_builtins %s %librt -o %t && %run %t |
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| 2 | // REQUIRES: librt_has_clzti2 |
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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 number of leading 0-bits |
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| 11 | |
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| 12 | // Precondition: a != 0 |
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| 13 | |
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| 14 | COMPILER_RT_ABI int __clzti2(ti_int a); |
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| 15 | |
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| 16 | int test__clzti2(ti_int a, int expected) |
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| 17 | { |
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| 18 | int x = __clzti2(a); |
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| 19 | if (x != expected) |
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| 20 | { |
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| 21 | twords at; |
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| 22 | at.all = a; |
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| 23 | printf(format: "error in __clzti2(0x%llX%.16llX) = %d, expected %d\n" , |
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| 24 | at.s.high, at.s.low, x, expected); |
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| 25 | } |
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| 26 | return x != expected; |
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| 27 | } |
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| 28 | |
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| 29 | char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0}; |
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| 30 | |
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| 31 | #endif |
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| 32 | |
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| 33 | int main() |
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| 34 | { |
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| 35 | #ifdef CRT_HAS_128BIT |
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| 36 | const int N = (int)(sizeof(ti_int) * CHAR_BIT); |
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| 37 | |
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| 38 | if (test__clzti2(a: 0x00000001, expected: N-1)) |
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| 39 | return 1; |
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| 40 | if (test__clzti2(a: 0x00000002, expected: N-2)) |
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| 41 | return 1; |
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| 42 | if (test__clzti2(a: 0x00000003, expected: N-2)) |
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| 43 | return 1; |
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| 44 | if (test__clzti2(a: 0x00000004, expected: N-3)) |
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| 45 | return 1; |
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| 46 | if (test__clzti2(a: 0x00000005, expected: N-3)) |
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| 47 | return 1; |
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| 48 | if (test__clzti2(a: 0x0000000A, expected: N-4)) |
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| 49 | return 1; |
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| 50 | if (test__clzti2(a: 0x1000000A, expected: N*3/4+3)) |
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| 51 | return 1; |
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| 52 | if (test__clzti2(a: 0x2000000A, expected: N*3/4+2)) |
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| 53 | return 1; |
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| 54 | if (test__clzti2(a: 0x6000000A, expected: N*3/4+1)) |
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| 55 | return 1; |
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| 56 | if (test__clzti2(a: 0x8000000AuLL, expected: N*3/4)) |
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| 57 | return 1; |
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| 58 | if (test__clzti2(a: 0x000005008000000AuLL, expected: 85)) |
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| 59 | return 1; |
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| 60 | if (test__clzti2(a: 0x020005008000000AuLL, expected: 70)) |
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| 61 | return 1; |
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| 62 | if (test__clzti2(a: 0x720005008000000AuLL, expected: 65)) |
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| 63 | return 1; |
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| 64 | if (test__clzti2(a: 0x820005008000000AuLL, expected: 64)) |
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| 65 | return 1; |
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| 66 | |
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| 67 | if (test__clzti2(a: make_ti(h: 0x0000000080000000LL, l: 0x8000000800000000LL), expected: 32)) |
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| 68 | return 1; |
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| 69 | if (test__clzti2(a: make_ti(h: 0x0000000100000000LL, l: 0x8000000800000000LL), expected: 31)) |
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| 70 | return 1; |
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| 71 | if (test__clzti2(a: make_ti(h: 0x1000000100000000LL, l: 0x8000000800000000LL), expected: 3)) |
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| 72 | return 1; |
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| 73 | if (test__clzti2(a: make_ti(h: 0x7000000100000000LL, l: 0x8000000800000000LL), expected: 1)) |
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| 74 | return 1; |
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| 75 | if (test__clzti2(a: make_ti(h: 0x8000000100000000LL, l: 0x8000000800000000LL), expected: 0)) |
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| 76 | return 1; |
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| 77 | #else |
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| 78 | printf("skipped\n" ); |
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| 79 | #endif |
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| 80 | return 0; |
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| 81 | } |
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| 82 | |
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