// File    	   : fp.h
// Coded by    : Scotte
// History     : Created 19/12/99 14:59:01
//
//				 Modified 12/03/00 Added casts to convert to hword and word types
//
// Description : Fixed point number stuff
// Notes       : None


#ifndef _FP_H_
#define _FP_H_


#include "gtypes.h"


// Function    : mSETFP12_4()
// Coded by    : Scotte
// History     : Created 19/12/99 15:02:21
//
// Description : Set a 16 bit fixed point number (12.4)
//
// Parameters  : n - number to convert to fixed point
//
// Returns     : Fixed point version of n
//
// Notes       : None


#define mSETFP12_4(n)\
	((hword)((n)*16))


// Function    : mSETFP12_4S()
// Coded by    : Scotte
// History     : Created 19/12/99 15:02:21
//
// Description : Set a 16 bit fixed point number (12.4)
//
// Parameters  : n - number to convert to fixed point
//
// Returns     : Fixed point version of n
//
// Notes       : Uses a shift instead of multipilcation


#define mSETFP12_4S(n)\
	((hword)((n)<<4))


// Function    : mGETFP12_4()
// Coded by    : Scotte
// History     : Created 19/12/99 15:02:21
//
// Description : Get a number from 16 bit fixed point number (12.4)
//
// Parameters  : n - fixed point number to convert
//
// Returns     : Whole part of fixed point number
//
// Notes       : None


#define mGETFP12_4(n)\
	((hword)((n)/16))


// Function    : mGETFP12_4S()
// Coded by    : Scotte
// History     : Created 19/12/99 15:02:21
//
// Description : Get a number from 16 bit fixed point number (12.4)
//
// Parameters  : n - number to convert to fixed point
//
// Returns     : Whole part of fixed point number
//
// Notes       : Uses shift instead of division


#define mGETFP12_4S(n)\
	((hword)((n)>>4))


// Macro       : mSETFP24_8()
// Coded by    : Scotte
// History     : Created 12/03/00 11:04:04
//
// Description : Set a 32 bit fixed point number (24.8)
//
// Parameters  : n - number to convert to fixed point
//
// Returns     : Fixed point version of n
//
// Notes       : None


#define mSETFP24_8(n)\
	((word)((n)*256))


// Macro       : mSETFP24_8S()
// Coded by    : Scotte
// History     : Created 12/03/00 11:04:04
//
// Description : Set a 32 bit fixed point number (24.8)
//
// Parameters  : n - number to convert to fixed point
//
// Returns     : Fixed point version of n
//
// Notes       : Uses a shift instead of multiplication


#define mSETFP24_8S(n)\
	((word)((n)<<8))


// Function    : mGETFP24_8()
// Coded by    : Scotte
// History     : Created 12/03/00 11:05:28
//
// Description : Get a number from 16 bit fixed point number (12.4)
//
// Parameters  : n - number to convert to fixed point
//
// Returns     : Whole part of fixed point number
//
// Notes       : None


#define mGETFP24_8(n)\
	((word)((n)/256))


// Function    : mGETFP24_8S()
// Coded by    : Scotte
// History     : Created 12/03/00 11:05:28
//
// Description : Get a number from 16 bit fixed point number (12.4)
//
// Parameters  : n - number to convert to fixed point
//
// Returns     : Whole part of fixed point number
//
// Notes       : Uses shift instead of division


#define mGETFP24_8S(n)\
	((word)((n)>>8))


#endif