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991228-1.c: Take word endianness into account.

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* gcc.c-torture/execute/991228-1.c: Take word endianness into
account.

From-SVN: r38725
This commit is contained in:
Alexandre Oliva 2001-01-05 22:06:29 +00:00 committed by Alexandre Oliva
parent cc1fe44fe8
commit 336bc4aede
2 changed files with 13 additions and 2 deletions
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5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2001-01-05 Alexandre Oliva <aoliva@redhat.com>
* gcc.c-torture/execute/991228-1.c: Take word endianness into
account.
2001-01-05 Joseph S. Myers <jsm28@cam.ac.uk>
* gcc.c-torture/execute/builtin-complex-1.c: New test.

10
gcc/testsuite/gcc.c-torture/execute/991228-1.c
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@ -1,15 +1,21 @@
__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[0] < 0;
return u.i[MSW] < 0;
}
int main(void)
{
if (2*sizeof(int) != sizeof(double) || u.i[0] >= 0)
if (2*sizeof(int) != sizeof(double) || u.i[MSW] >= 0)
exit(0);
if (!signbit(-0.25))