/* PR54087. Verify __atomic_sub (val) uses __atomic_add (-val) if there is no | |
atomic_aub. */ | |
/* { dg-do compile { target { i?86-*-* x86_64-*-* } } } */ | |
/* { dg-require-effective-target sync_int_long } */ | |
/* { dg-final { scan-assembler-times "xadd" 2 } } */ | |
int a; | |
int f1(int p) | |
{ | |
return __atomic_sub_fetch(&a, p, __ATOMIC_SEQ_CST) == 0; | |
} | |
int f2(int p) | |
{ | |
return __atomic_fetch_sub(&a, p, __ATOMIC_SEQ_CST) - p == 0; | |
} |