41 lines
796 B
C
41 lines
796 B
C
// RUN: %clang_builtins %s %librt -o %t && %run %t
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// REQUIRES: librt_has_paritysi2
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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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// Returns: 1 if number of bits is odd else returns 0
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COMPILER_RT_ABI int __paritysi2(si_int a);
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int naive_parity(si_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__paritysi2(si_int a)
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{
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si_int x = __paritysi2(a);
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si_int expected = naive_parity(a);
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if (x != expected)
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printf("error in __paritysi2(0x%X) = %d, expected %d\n",
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a, x, expected);
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return x != expected;
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}
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char assumption_2[sizeof(si_int)*CHAR_BIT == 32] = {0};
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int main()
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{
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int i;
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for (i = 0; i < 10000; ++i)
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if (test__paritysi2(rand()))
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return 1;
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return 0;
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}
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