supermario/base/SuperMarioProj.1994-02-09/Interfaces/CIncludes/EndianAware.h
2019-06-29 23:17:50 +08:00

58 lines
1002 B
C

/*
File: EndianAware.h
Contains: macros for 68K clients that are aware of platform endian-ness
Written by: Craig Prouse
Copyright: © 1993 by Apple Computer, Inc., all rights reserved.
Change History (most recent first):
<SM2> 12/1/93 chp Give inline functions external C linkage to make #pragma
parameter work in C++ builds.
<SM1> 11/10/93 fau first checked in
*/
#ifndef __ENDIANAWARE__
#define __ENDIANAWARE__
#ifndef littleEndian
#define littleEndian 1
#endif
#if littleEndian
#ifdef __cplusplus
extern "C" {
#endif
#pragma parameter __D0 EndianSwap16 (__D0)
unsigned short EndianSwap16 (unsigned short) =
{
0xE158 // ROL.W #8,D0
};
#pragma parameter __D0 EndianSwap32 (__D0)
unsigned long EndianSwap32 (unsigned long) =
{
0xE158, // ROL.W #8,D0
0x4840, // SWAP D0
0xE158 // ROL.W #8,D0
};
#ifdef __cplusplus
}
#endif
#else
#define EndianSwap16(a) (a)
#define EndianSwap32(a) (a)
#endif litteEndian
#endif __ENDIANAWARE__