Viewing file:  pr57744.c (1.23 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* { dg-do run { target { powerpc*-*-* && lp64 } } } */
/* { dg-skip-if "" { powerpc*-*-darwin* } } */
/* { dg-require-effective-target powerpc_p8vector_ok } */
/* { dg-options "-mdejagnu-cpu=power8 -O3" } */
void abort (void);
typedef unsigned U_16 __attribute__((mode(TI)));
extern int libat_compare_exchange_16 (U_16 *, U_16 *, U_16, int, int)
__attribute__((__noinline__));
/* PR 57744: lqarx/stqcx needs even/odd register pairs. The assembler will
complain if the compiler gets an odd/even register pair. Create a function
which has the 16 byte compare and exchange instructions, but don't actually
execute it, so that we can detect these failures on older machines. */
int
libat_compare_exchange_16 (U_16 *mptr, U_16 *eptr, U_16 newval,
int smodel, int fmodel __attribute__((unused)))
{
if (((smodel) == 0))
return __atomic_compare_exchange_n (mptr, eptr, newval, 0, 0, 0);
else if (((smodel) != 5))
return __atomic_compare_exchange_n (mptr, eptr, newval, 0, 4, 0);
else
return __atomic_compare_exchange_n (mptr, eptr, newval, 0, 5, 0);
}
U_16 a = 1, b = 1, c = -2;
volatile int do_test = 0;
int main (void)
{
if (do_test && !libat_compare_exchange_16 (&a, &b, c, 0, 0))
abort ();
return 0;
}
|
