Question

#include <intrins.h> 是怎么实现的

#ifndef __INTRINS_H__
#define __INTRINS_H__

extern void _nop_ (void);
extern bit _testbit_ (bit);
extern unsigned char _cror_ (unsigned char, unsigned char);
extern unsigned int _iror_ (unsigned int, unsigned char);
extern unsigned long _lror_ (unsigned long, unsigned char);
extern unsigned char _crol_ (unsigned char, unsigned char);
extern unsigned int _irol_ (unsigned int, unsigned char);
extern unsigned long _lrol_ (unsigned long, unsigned char);
extern unsigned char _chkfloat_(float);
extern void _push_ (unsigned char _sfr);
extern void _pop_ (unsigned char _sfr);

#endif

首先是看不懂这个.h的文件 请具体解释下

还有就是不知道是什么实现左移右移的

Answer 1

函数的具体实现都不在这个库里面，当然看不懂了
_cror_ 是右环移
_crol_是左环移