Genesis-Plus-GX/source/macros.h

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#ifndef _MACROS_H_
#define _MACROS_H_
#ifdef LSB_FIRST
#define READ_BYTE(BASE, ADDR) (BASE)[(ADDR)^1]
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#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)+1])
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#define WRITE_BYTE(BASE, ADDR, VAL) (BASE)[(ADDR)^1] = (VAL)&0xff
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#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
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#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
#endif /* _MACROS_H_ */