问一个小问题

rui631483900

msp430中本征函数是什么。像这些函数的运用机制是什么啊？系统怎么识别他们的/

_intrinsic void __no_operation(void);
__intrinsic void __ena××e_interrupt(void);
__intrinsic void __disa××e_interrupt(void);
__intrinsic istate_t __get_interrupt_state(void);
__intrinsic void __set_interrupt_state(istate_t);
__intrinsic void __op_code(unsigned short);
__intrinsic unsigned short __swap_bytes(unsigned short);
__intrinsic void __bic_SR_register(unsigned short);
__intrinsic void __bis_SR_register(unsigned short);
__intrinsic unsigned short __get_SR_register(void);
__intrinsic void __bic_SR_register_on_exit(unsigned short);
__intrinsic void __bis_SR_register_on_exit(unsigned short);
__intrinsic unsigned short __get_SR_register_on_exit(void);
__intrinsic unsigned short _BIS_SR(unsigned short);
__intrinsic unsigned short _BIC_SR(unsigned short);
__intrinsic unsigned short _BIS_SR_IRQ(unsigned short);
__intrinsic unsigned short _BIC_SR_IRQ(unsigned short);
__intrinsic unsigned short _BIS_NMI_IE1(unsigned short);