Genesis-Plus-GX/source/macros.h

#ifndef _MACROS_H_
#define _MACROS_H_

#ifdef LSB_FIRST

#define READ_BYTE(BASE, ADDR) (BASE)[(ADDR)^1]

#define READ_WORD(BASE, ADDR) (((BASE)[ADDR]<<8) | (BASE)[(ADDR)+1])

#define READ_WORD_LONG(BASE, ADDR) (((BASE)[(ADDR)+1]<<24) |      \
                                    ((BASE)[(ADDR)]<<16) |  \
                                    ((BASE)[(ADDR)+3]<<8) |   \
                                    (BASE)[(ADDR)+2])

#define WRITE_BYTE(BASE, ADDR, VAL) (BASE)[(ADDR)^1] = (VAL)&0xff

#define WRITE_WORD(BASE, ADDR, VAL) (BASE)[ADDR] = ((VAL)>>8) & 0xff; \
                                      (BASE)[(ADDR)+1] = (VAL)&0xff

#define WRITE_WORD_LONG(BASE, ADDR, VAL) (BASE)[(ADDR+1)] = ((VAL)>>24) & 0xff;    \
                                          (BASE)[(ADDR)] = ((VAL)>>16)&0xff;  \
                                          (BASE)[(ADDR+3)] = ((VAL)>>8)&0xff;   \
                                          (BASE)[(ADDR+2)] = (VAL)&0xff

#else

#define READ_BYTE(BASE, ADDR) (BASE)[ADDR]
#define READ_WORD(BASE, ADDR) *(uint16 *)((BASE) + (ADDR))
#define READ_WORD_LONG(BASE, ADDR) *(uint32 *)((BASE) + (ADDR))
#define WRITE_BYTE(BASE, ADDR, VAL) (BASE)[ADDR] = VAL & 0xff
#define WRITE_WORD(BASE, ADDR, VAL) *(uint16 *)((BASE) + (ADDR)) = VAL & 0xffff
#define WRITE_WORD_LONG(BASE, ADDR, VAL) *(uint32 *)((BASE) + (ADDR)) = VAL & 0xffffffff
#endif

/* C89 compatibility */
#ifndef M_PI
#define M_PI 3.14159265358979323846264338327f
#endif /* M_PI */

/* Set to your compiler's static inline keyword to enable it, or
 * set it to blank to disable it.
 * If you define INLINE in the makefile, it will override this value.
 * NOTE: not enabling inline functions will SEVERELY slow down emulation.
 */
#ifndef INLINE
#define INLINE static __inline__
#endif /* INLINE */

#endif /* _MACROS_H_ */