56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
// RUN: %clang_builtins %s %librt -o %t && %run %t
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// REQUIRES: librt_has_parityti2
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// REQUIRES: int128
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#include "int_lib.h"
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef CRT_HAS_128BIT
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// Returns: 1 if number of bits is odd else returns 0
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COMPILER_RT_ABI int __parityti2(ti_int a);
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int naive_parity(ti_int a)
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{
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int r = 0;
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for (; a; a = a & (a - 1))
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r = ~r;
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return r & 1;
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}
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int test__parityti2(ti_int a)
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{
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si_int x = __parityti2(a);
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si_int expected = naive_parity(a);
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if (x != expected)
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{
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twords at;
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at.all = a;
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printf("error in __parityti2(0x%.16llX%.16llX) = %d, expected %d\n",
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at.s.high, at.s.low, x, expected);
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}
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return x != expected;
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}
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char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
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char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0};
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#endif
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int main()
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{
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#ifdef CRT_HAS_128BIT
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int i;
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for (i = 0; i < 10000; ++i)
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if (test__parityti2(((ti_int)rand() << 96) + ((ti_int)rand() << 64) +
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((ti_int)rand() << 32) + rand()))
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return 1;
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#else
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printf("skipped\n");
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#endif
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return 0;
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}
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