Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.c-torture/execute/991228-1.c @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
---|---|
date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children |
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__extension__ union { double d; int i[2]; } u = { d: -0.25 }; /* This assumes the endianness of words in a long long is the same as that for doubles, which doesn't hold for a few platforms, but we can probably special case them here, as appropriate. */ long long endianness_test = 1; #define MSW (*(int*)&endianness_test) int signbit(double x) { __extension__ union { double d; int i[2]; } u = { d: x }; return u.i[MSW] < 0; } int main(void) { if (2*sizeof(int) != sizeof(double) || u.i[MSW] >= 0) exit(0); if (!signbit(-0.25)) abort(); exit(0); }