C51的INTRINS.H詳解

extern void_nop_(void);//空操作，相當于8051的NOP指令
extern bit_testbit_ (bit);//測試并清零位，相當于8051的JBC指令
extern unsigned char _cror_(unsigned char, unsigned char); //字符循環(huán)右移
extern unsigned int_iror_(unsigned int,unsigned char);//整數(shù)循環(huán)右移
extern unsigned long _lror_(unsigned long, unsigned char);//長整數(shù)循環(huán)右移
extern unsigned char _crol_(unsigned char, unsigned char);//字符循環(huán)左移
extern unsigned int_irol_(unsigned int,unsigned char);//整數(shù)循環(huán)左移
extern unsigned long _lrol_(unsigned long, unsigned char);//長整數(shù)循環(huán)左移
extern unsigned char _chkfloat_(float);//測試并返回源點數(shù)狀態(tài)