STC89C52RC单片机额外篇 04 - 认识头文件＜intrins

INTRINS.H

Intrinsic functions for C51.
Copyright © 1988-2010 Keil Elektronik GmbH and ARM Germany GmbH
All rights reserved.
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#ifndef __INTRINS_H__
#define __INTRINS_H__

#pragma SAVE

#if defined (__CX2__)
#pragma FUNCTIONS(STATIC)
/* intrinsic functions are reentrant, but need static attribute */
#endif

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);
#if defined (__CX2__)
ext