ALPHA_PCI_INTR_HANDLE_FLAGS
__SHIFTIN(flags, ALPHA_PCI_INTR_HANDLE_FLAGS);
ihp->value = (ihp->value & ALPHA_PCI_INTR_HANDLE_FLAGS) |
__SHIFTIN(flags, ALPHA_PCI_INTR_HANDLE_FLAGS);
return __SHIFTOUT(ihp->value, ALPHA_PCI_INTR_HANDLE_FLAGS);