buildengine/platform.h at main · icculus/buildengine · GitHub

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#ifndef _INCLUDE_PLATFORM_H_
#define _INCLUDE_PLATFORM_H_

#if (defined PLATFORM_WIN32)
#include "win32_compat.h"
#elif (defined PLATFORM_MACOSX)
#include "unix_compat.h"
#include <machine/endian.h>
#elif (defined PLATFORM_FREEBSD)
#include "unix_compat.h"
#include <sys/endian.h>
#elif (defined PLATFORM_UNIX)
#include "unix_compat.h"
#if !defined(__SUNPRO_C)
#include <endian.h>
#endif
#elif (defined PLATFORM_DOS)
#include "doscmpat.h"
#else
#error Define your platform!
#endif

#ifdef PLATFORM_MACOSX
    /* may be an x86 Mac, so turn off PowerPC ASM and Altivec if needed... */
    #if __POWERPC__
        #define HAVE_POWERPC 1
    #endif
#endif

#ifdef PLATFORM_LINUXPPC
#define HAVE_POWERPC 1
#endif

#if (!defined __EXPORT__)
#define __EXPORT__
#endif

#if ((defined PLATFORM_SUPPORTS_SDL) && (!defined PLATFORM_TIMER_HZ))
#define PLATFORM_TIMER_HZ 100
#endif

#if (!defined PLATFORM_TIMER_HZ)
#error You need to define PLATFORM_TIMER_HZ for your platform.
#endif

#if (defined __WATCOMC__)
#define snprintf _snprintf
#endif

#if (defined __SUNPRO_C)
#define __inline inline
#endif

static __inline unsigned short _swap16(unsigned short D)
{
#if HAVE_POWERPC
    register unsigned short returnValue;
    __asm__ volatile("lhbrx %0,0,%1"
        : "=r" (returnValue)
        : "r" (&D)
    );
    return returnValue;
#else
    return((D<<8)|(D>>8));
#endif
}

static __inline unsigned int _swap32(unsigned int D)
{
#if HAVE_POWERPC
    register unsigned int returnValue;
    __asm__ volatile("lwbrx %0,0,%1"
        : "=r" (returnValue)
        : "r" (&D)
    );
    return returnValue;
#else
    return((D<<24)|((D<<8)&0x00FF0000)|((D>>8)&0x0000FF00)|(D>>24));
#endif
}

#if HAVE_POWERPC
#define PLATFORM_BIGENDIAN 1
#define BUILDSWAP_INTEL16(x) _swap16(x)
#define BUILDSWAP_INTEL32(x) _swap32(x)
#else
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define PLATFORM_LITTLEENDIAN 1
#define BUILDSWAP_INTEL16(x) (x)
#define BUILDSWAP_INTEL32(x) (x)
#else
#define PLATFORM_BIGENDIAN 1
#define BUILDSWAP_INTEL16(x) _swap16(x)
#define BUILDSWAP_INTEL32(x) _swap32(x)
#endif
#endif

extern int has_altivec;  /* PowerPC-specific. */

#endif  /* !defined _INCLUDE_PLATFORM_H_ */

/* end of platform.h ... */