//---------------------------------------------------------------------------
// NEOPOP : Emulator as in Dreamland
//
// Copyright (c) 2001-2002 by neopop_uk
//---------------------------------------------------------------------------

//---------------------------------------------------------------------------
//	This program is free software; you can redistribute it and/or modify
//	it under the terms of the GNU General Public License as published by
//	the Free Software Foundation; either version 2 of the License, or
//	(at your option) any later version. See also the license.txt file for
//	additional informations.
//---------------------------------------------------------------------------

/*
//---------------------------------------------------------------------------
//=========================================================================

	TLCS900h_interpret.c

//=========================================================================
//---------------------------------------------------------------------------

  History of changes:
  ===================

20 JUL 2002 - neopop_uk
=======================================
- Cleaned and tidied up for the source release

26 JUL 2002 - neopop_uk
=======================================
- Fixed a nasty bug that only affects [src]"EX (mem), XWA", 
	it was executing "EX F,F'" instead - Very bad! 

28 JUL 2002 - neopop_uk
=======================================
- Added generic DIV and DIVS functions

30 AUG 2002 - neopop_uk
=======================================
- Fixed detection of R32+d16 addressing mode.

02 SEP 2002 - neopop_uk
=======================================
- Added the undocumented type 0x13 R32 address mode.

09 SEP 2002 - neopop_uk
=======================================
- Extra cycles for addressing modes.

//---------------------------------------------------------------------------
*/

#include "neopop.h"
#include "TLCS900h_registers.h"
#include "interrupt.h"
#include "mem.h"
#include "bios.h"
#include "TLCS900h_interpret.h"
#include "TLCS900h_interpret_single.h"
#include "TLCS900h_interpret_src.h"
#include "TLCS900h_interpret_dst.h"
#include "TLCS900h_interpret_reg.h"


extern int OSUB64(_u32 a, _u32 b); //add
extern int OADD64(_u32 a, _u32 b); //add


//=========================================================================

_u32	mem;		//Result of addressing mode
int		size;		//operand size, 0 = Byte, 1 = Word, 2 = Long

_u8		first;		//The first byte
_u8		R;			//big R
_u8		second;		//The second opcode

BOOL	brCode;		//Register code used?
_u8		rCode;		//The code

_u8		cycles;			//How many state changes?
_u8		cycles_extra;	//How many extra state changes?

//=========================================================================

_u16 fetch16(void)
{
	_u16 a = loadW(pc);
	pc += 2;
	return a;
}

_u32 fetch24(void)
{
	_u32 b, a = loadW(pc);
	pc += 2;
	b = loadB(pc++);
	return (b << 16) | a;
}

_u32 fetch32(void)
{
	_u32 a = loadL(pc);
	pc += 4;
	return a;
}

//=============================================================================

void parityB(_u8 value)
{
	_u8 count = 0, i;

	for (i = 0; i < 8; i++)
	{
		if (value & 1) count++;
		value >>= 1;
	}

	// if (count & 1) == FALSE, means even, thus SET
	SETFLAG_V((count & 1) == 0);
}

void parityW(_u16 value)
{
	_u8 count = 0, i;

	for (i = 0; i < 16; i++)
	{
		if (value & 1) count++;
		value >>= 1;
	}

	// if (count & 1) == FALSE, means even, thus SET
	SETFLAG_V((count & 1) == 0);
}

//=========================================================================

void push8(_u8 data)	{ REGXSP -= 1;	storeB(REGXSP, data);}
void push16(_u16 data)	{ REGXSP -= 2;	storeW(REGXSP, data);}
void push32(_u32 data)	{ REGXSP -= 4;	storeL(REGXSP, data);}

_u8 pop8(void)	 {  _u8 temp = loadB(REGXSP); REGXSP += 1; return temp;}
_u16 pop16(void) { _u16 temp = loadW(REGXSP); REGXSP += 2; return temp;}
_u32 pop32(void) { _u32 temp = loadL(REGXSP); REGXSP += 4; return temp;}

//=============================================================================

_u16 generic_DIV_B(_u16 val, _u8 div)
{
	if (div == 0)
	{ 
		SETFLAG_V1
		return (val << 8) | ((val >> 8) ^ 0xFF);
	}
	else
	{
		_u16 quo = val / (_u16)div;
		_u16 rem = val % (_u16)div;
		if (quo > 0xFF) SETFLAG_V1 else SETFLAG_V0
		return (quo & 0xFF) | ((rem & 0xFF) << 8);
	}
}

_u32 generic_DIV_W(_u32 val, _u16 div)
{
	if (div == 0)
	{ 
		SETFLAG_V1
		return (val << 16) | ((val >> 16) ^ 0xFFFF);
	}
	else
	{
		_u32 quo = val / (_u32)div;
		_u32 rem = val % (_u32)div;
		if (quo > 0xFFFF) SETFLAG_V1 else SETFLAG_V0
		return (quo & 0xFFFF) | ((rem & 0xFFFF) << 16);
	}
}

//=============================================================================

_u16 generic_DIVS_B(_s16 val, _s8 div)
{
	if (div == 0)
	{
		SETFLAG_V1
		return (val << 8) | ((val >> 8) ^ 0xFF);
	}
	else
	{
		_s16 quo = val / (_s16)div;
		_s16 rem = val % (_s16)div;
		if (quo > 0xFF) SETFLAG_V1 else SETFLAG_V0
		return (quo & 0xFF) | ((rem & 0xFF) << 8);
	}
}

_u32 generic_DIVS_W(_s32 val, _s16 div)
{
	if (div == 0)
	{
		SETFLAG_V1
		return (val << 16) | ((val >> 16) ^ 0xFFFF);
	}
	else
	{
		_s32 quo = val / (_s32)div;
		_s32 rem = val % (_s32)div;
		if (quo > 0xFFFF) SETFLAG_V1 else SETFLAG_V0
		return (quo & 0xFFFF) | ((rem & 0xFFFF) << 16);
	}
}

//=============================================================================

_u8 generic_ADD_B(_u8 dst, _u8 src)
{
	_u8 half = (dst & 0xF) + (src & 0xF);
	_u32 resultC = (_u32)dst + (_u32)src;
	_u8 result = (_u8)(resultC & 0xFF);

	SETFLAG_S(result & 0x80);
	SETFLAG_Z(result == 0);
	SETFLAG_H(half > 0xF);

	if ((((_s8)dst >= 0) && ((_s8)src >= 0) && ((_s8)result < 0)) ||
		(((_s8)dst < 0)  && ((_s8)src < 0) && ((_s8)result >= 0)))
	{SETFLAG_V1} else {SETFLAG_V0}

	SETFLAG_N0;
	SETFLAG_C(resultC > 0xFF);

	return result;
}

_u16 generic_ADD_W(_u16 dst, _u16 src)
{
	_u16 half = (dst & 0xF) + (src & 0xF);
	_u32 resultC = (_u32)dst + (_u32)src;
	_u16 result = (_u16)(resultC & 0xFFFF);

	SETFLAG_S(result & 0x8000);
	SETFLAG_Z(result == 0);
	SETFLAG_H(half > 0xF);

	if ((((_s16)dst >= 0) && ((_s16)src >= 0) && ((_s16)result < 0)) ||
		(((_s16)dst < 0)  && ((_s16)src < 0) && ((_s16)result >= 0)))
	{SETFLAG_V1} else {SETFLAG_V0}

	SETFLAG_N0;
	SETFLAG_C(resultC > 0xFFFF);

	return result;
}

_u32 generic_ADD_L(_u32 dst, _u32 src)
{
  extern int OADD64(_u32 a, _u32 b);
//	_u64 resultC = (_u64)dst + (_u64)src;
///	_u32 result = (_u32)(resultC & 0xFFFFFFFF);
   int res=OADD64(dst,src);
	_u32 result = dst + src;
  
	SETFLAG_S(result & 0x80000000);
	SETFLAG_Z(result == 0);

	if ((((_s32)dst >= 0) && ((_s32)src >= 0) && ((_s32)result < 0)) || 
		(((_s32)dst < 0)  && ((_s32)src < 0) && ((_s32)result >= 0)))
	{SETFLAG_V1} else {SETFLAG_V0}
	
	SETFLAG_N0;
	SETFLAG_C(res);
  //SETFLAG_C(resultC > 0xFFFFFFFF);
	return result;
}

//=============================================================================

_u8 generic_ADC_B(_u8 dst, _u8 src)
{
	_u8 half = (dst & 0xF) + (src & 0xF) + FLAG_C;
	_u32 resultC = (_u32)dst + (_u32)src + (_u32)FLAG_C;
	_u8 result = (_u8)(resultC & 0xFF);

	SETFLAG_S(result & 0x80);
	SETFLAG_Z(result == 0);
	SETFLAG_H(half > 0xF);

	if ((((_s8)dst >= 0) && ((_s8)src >= 0) && ((_s8)result < 0)) || 
		(((_s8)dst < 0)  && ((_s8)src < 0) && ((_s8)result >= 0)))
	{SETFLAG_V1} else {SETFLAG_V0}

	SETFLAG_N0;
	SETFLAG_C(resultC > 0xFF);

	return result;
}

_u16 generic_ADC_W(_u16 dst, _u16 src)
{
	_u16 half = (dst & 0xF) + (src & 0xF) + FLAG_C;
	_u32 resultC = (_u32)dst + (_u32)src + (_u32)FLAG_C;
	_u16 result = (_u16)(resultC & 0xFFFF);

	SETFLAG_S(result & 0x8000);
	SETFLAG_Z(result == 0);
	SETFLAG_H(half > 0xF);

	if ((((_s16)dst >= 0) && ((_s16)src >= 0) && ((_s16)result < 0)) || 
		(((_s16)dst < 0)  && ((_s16)src < 0) && ((_s16)result >= 0)))
	{SETFLAG_V1} else {SETFLAG_V0}

	SETFLAG_N0;
	SETFLAG_C(resultC > 0xFFFF);

	return result;
}

_u32 generic_ADC_L(_u32 dst, _u32 src)
{
    extern int OADD64(_u32 a, _u32 b);
//	_u64 resultC = (_u64)dst + (_u64)src + (_u64)FLAG_C;
//	_u32 result = (_u32)(resultC & 0xFFFFFFFF);
        int res = OADD64(dst, src + FLAG_C);
        _u32 result = dst + src + FLAG_C;
        
	SETFLAG_S(result & 0x80000000);
	SETFLAG_Z(result == 0);

	if ((((_s32)dst >= 0) && ((_s32)src >= 0) && ((_s32)result < 0)) || 
		(((_s32)dst < 0)  && ((_s32)src < 0) && ((_s32)result >= 0)))
	{SETFLAG_V1} else {SETFLAG_V0}
	
	SETFLAG_N0;
	SETFLAG_C(res);//ultC > 0xFFFFFFFF);
  //SETFLAG_C(resultC > 0xFFFFFFFF);
	return result;
}

//=============================================================================

_u8 generic_SUB_B(_u8 dst, _u8 src)
{
	_u8 half = (dst & 0xF) - (src & 0xF);
	_u32 resultC = (_u32)dst - (_u32)src;
	_u8 result = (_u8)(resultC & 0xFF);

	SETFLAG_S(result & 0x80);
	SETFLAG_Z(result == 0);
	SETFLAG_H(half > 0xF);

	if ((((_s8)dst >= 0) && ((_s8)src < 0) && ((_s8)result < 0)) ||
		(((_s8)dst < 0) && ((_s8)src >= 0) && ((_s8)result >= 0)))
	{SETFLAG_V1} else {SETFLAG_V0}

	SETFLAG_N1;
	SETFLAG_C(resultC > 0xFF);

	return result;
}

_u16 generic_SUB_W(_u16 dst, _u16 src)
{
	_u16 half = (dst & 0xF) - (src & 0xF);
	_u32 resultC = (_u32)dst - (_u32)src;
	_u16 result = (_u16)(resultC & 0xFFFF);

	SETFLAG_S(result & 0x8000);
	SETFLAG_Z(result == 0);
	SETFLAG_H(half > 0xF);

	if ((((_s16)dst >= 0) && ((_s16)src < 0) && ((_s16)result < 0)) ||
		(((_s16)dst < 0) && ((_s16)src >= 0) && ((_s16)result >= 0)))
	{SETFLAG_V1} else {SETFLAG_V0}

	SETFLAG_N1;
	SETFLAG_C(resultC > 0xFFFF);

	return result;
}

_u32 generic_SUB_L(_u32 dst, _u32 src)
{
   //extern int OSUB64(_u32 a, _u32 b);
//   _u64 resultC = (_u64)dst - (_u64)src;
	//_u32 result = (_u32)(resultC & 0xFFFFFFFF);
       int res = OSUB64(dst, src);
        _u32 result = dst - src;

	SETFLAG_S(result & 0x80000000);
	SETFLAG_Z(result == 0);

	if ((((_s32)dst >= 0) && ((_s32)src < 0) && ((_s32)result < 0)) ||
		(((_s32)dst < 0) && ((_s32)src >= 0) && ((_s32)result >= 0)))
	{SETFLAG_V1} else {SETFLAG_V0}
	
	SETFLAG_N1;
	SETFLAG_C(res);
  //SETFLAG_C(resultC > 0xFFFFFFFF);
	return result;
}

//=============================================================================

_u8 generic_SBC_B(_u8 dst, _u8 src)
{
	_u8 half = (dst & 0xF) - (src & 0xF) - FLAG_C;
	_u32 resultC = (_u32)dst - (_u32)src - (_u32)FLAG_C;
	_u8 result = (_u8)(resultC & 0xFF);

	SETFLAG_S(result & 0x80);
	SETFLAG_Z(result == 0);
	SETFLAG_H(half > 0xF);

	if ((((_s8)dst >= 0) && ((_s8)src < 0) && ((_s8)result < 0)) ||
		(((_s8)dst < 0) && ((_s8)src >= 0) && ((_s8)result >= 0)))
	{SETFLAG_V1} else {SETFLAG_V0}

	SETFLAG_N1;
	SETFLAG_C(resultC > 0xFF);

	return result;
}

_u16 generic_SBC_W(_u16 dst, _u16 src)
{
	_u16 half = (dst & 0xF) - (src & 0xF) - FLAG_C;
	_u32 resultC = (_u32)dst - (_u32)src - (_u32)FLAG_C;
	_u16 result = (_u16)(resultC & 0xFFFF);

	SETFLAG_S(result & 0x8000);
	SETFLAG_Z(result == 0);
	SETFLAG_H(half > 0xF);

	if ((((_s16)dst >= 0) && ((_s16)src < 0) && ((_s16)result < 0)) ||
		(((_s16)dst < 0) && ((_s16)src >= 0) && ((_s16)result >= 0)))
	{SETFLAG_V1} else {SETFLAG_V0}

	SETFLAG_N1;
	SETFLAG_C(resultC > 0xFFFF);

	return result;
}

_u32 generic_SBC_L(_u32 dst, _u32 src)
{
//      extern int OSUB64(_u32 a, _u32 b);
//	_u64 resultC = (_u64)dst - (_u64)src - (_u64)FLAG_C;
	//_u32 result = (_u32)(resultC & 0xFFFFFFFF);
        int res=OSUB64(dst, src - FLAG_C);
       _u32 result = dst - src - FLAG_C;

	SETFLAG_S(result & 0x80000000);
	SETFLAG_Z(result == 0);

	if ((((_s32)dst >= 0) && ((_s32)src < 0) && ((_s32)result < 0)) ||
		(((_s32)dst < 0) && ((_s32)src >= 0) && ((_s32)result >= 0)))
	{SETFLAG_V1} else {SETFLAG_V0}
	
	SETFLAG_N1;
	SETFLAG_C(res);//resultC > 0xFFFFFFFF);
  //SETFLAG_C(resultC > 0xFFFFFFFF);
	return result;
}

//=============================================================================

BOOL conditionCode(int cc)
{
	switch(cc)
	{
	case 0:	return 0;	//(F)
	case 1:	if (FLAG_S ^ FLAG_V) return 1; else return 0;	//(LT)
	case 2:	if (FLAG_Z | (FLAG_S ^ FLAG_V)) return 1; else return 0;	//(LE)
	case 3:	if (FLAG_C | FLAG_Z) return 1; else return 0;	//(ULE)
	case 4: if (FLAG_V) return 1; else return 0;	//(OV)
	case 5:	if (FLAG_S) return 1; else return 0;	//(MI)
	case 6:	if (FLAG_Z) return 1; else return 0;	//(Z)
	case 7:	if (FLAG_C) return 1; else return 0;	//(C)
	case 8:	return 1;	//always True														
	case 9:	if (FLAG_S ^ FLAG_V) return 0; else return 1;	//(GE)
	case 10:if (FLAG_Z | (FLAG_S ^ FLAG_V)) return 0; else return 1;	//(GT)
	case 11:if (FLAG_C | FLAG_Z) return 0; else return 1;	//(UGT)
	case 12:if (FLAG_V) return 0; else return 1;	//(NOV)
	case 13:if (FLAG_S) return 0; else return 1;	//(PL)
	case 14:if (FLAG_Z) return 0; else return 1;	//(NZ)
	case 15:if (FLAG_C) return 0; else return 1;	//(NC)
	}

#ifdef NEOPOP_DEBUG
	system_debug_message("Unknown Condition Code %d", cc);
#endif
	return FALSE;
}

//=============================================================================

_u8 get_rr_Target(void)
{
	_u8 target = 0x80;

	if (size == 0 && first == 0xC7)
		return rCode;

	//Create a regCode
	switch(first & 7)
	{
	case 0: if (size == 1)	target = 0xE0;	break;
	case 1:	
		if (size == 0)	target = 0xE0;
		if (size == 1)	target = 0xE4;
		break;
	case 2: if (size == 1)	target = 0xE8;	break;
	case 3:
		if (size == 0)	target = 0xE4;
		if (size == 1)	target = 0xEC;
		break;
	case 4: if (size == 1)	target = 0xF0;	break;
	case 5:	
		if (size == 0)	target = 0xE8;
		if (size == 1)	target = 0xF4;
		break;
	case 6: if (size == 1)	target = 0xF8;	break;
	case 7:
		if (size == 0)	target = 0xEC;
		if (size == 1)	target = 0xFC;
		break;
	}

	return target;
}

_u8 get_RR_Target(void)
{
	_u8 target = 0x80;

	//Create a regCode
	switch(second & 7)
	{
	case 0: if (size == 1)	target = 0xE0;	break;
	case 1:	
		if (size == 0)	target = 0xE0;
		if (size == 1)	target = 0xE4;
		break;
	case 2: if (size == 1)	target = 0xE8;	break;
	case 3:
		if (size == 0)	target = 0xE4;
		if (size == 1)	target = 0xEC;
		break;
	case 4: if (size == 1)	target = 0xF0;	break;
	case 5:	
		if (size == 0)	target = 0xE8;
		if (size == 1)	target = 0xF4;
		break;
	case 6: if (size == 1)	target = 0xF8;	break;
	case 7:
		if (size == 0)	target = 0xEC;
		if (size == 1)	target = 0xFC;
		break;
	}

	return target;
}

//=========================================================================

static void ExXWA()		{mem = regL(0);}
static void ExXBC()		{mem = regL(1);}
static void ExXDE()		{mem = regL(2);}
static void ExXHL()		{mem = regL(3);}
static void ExXIX()		{mem = regL(4);}
static void ExXIY()		{mem = regL(5);}
static void ExXIZ()		{mem = regL(6);}
static void ExXSP()		{mem = regL(7);}

static void ExXWAd()	{mem = regL(0) + (_s8)FETCH8; cycles_extra = 2;}
static void ExXBCd()	{mem = regL(1) + (_s8)FETCH8; cycles_extra = 2;}
static void ExXDEd()	{mem = regL(2) + (_s8)FETCH8; cycles_extra = 2;}
static void ExXHLd()	{mem = regL(3) + (_s8)FETCH8; cycles_extra = 2;}
static void ExXIXd()	{mem = regL(4) + (_s8)FETCH8; cycles_extra = 2;}
static void ExXIYd()	{mem = regL(5) + (_s8)FETCH8; cycles_extra = 2;}
static void ExXIZd()	{mem = regL(6) + (_s8)FETCH8; cycles_extra = 2;}
static void ExXSPd()	{mem = regL(7) + (_s8)FETCH8; cycles_extra = 2;}

static void Ex8()		{mem = FETCH8;		cycles_extra = 2;}
static void Ex16()		{mem = fetch16();	cycles_extra = 2;}
static void Ex24()		{mem = fetch24();	cycles_extra = 3;}

static void ExR32()
{
	_u8 data = FETCH8;

	if (data == 0x03)
	{
		_u8 rIndex, r32;
		r32 = FETCH8;		//r32
		rIndex = FETCH8;	//r8
		mem = rCodeL(r32) + (_s8)rCodeB(rIndex);
		cycles_extra = 8;
		return;
	}

	if (data == 0x07)
	{
		_u8 rIndex, r32;
		r32 = FETCH8;		//r32
		rIndex = FETCH8;	//r16
		mem = rCodeL(r32) + (_s16)rCodeW(rIndex);
		cycles_extra = 8;
		return;
	}

	//Undocumented mode!
	if (data == 0x13)
	{
		mem = pc + (_s16)fetch16();
		cycles_extra = 8;	//Unconfirmed... doesn't make much difference
		return;
	}

	cycles_extra = 5;

	if ((data & 3) == 1)
		mem = rCodeL(data) + (_s16)fetch16();
	else
		mem = rCodeL(data);
}

static void ExDec()
{
	_u8 data = FETCH8;
	_u8 r32 = data & 0xFC;

	cycles_extra = 3;

	switch(data & 3)
	{
	case 0:	rCodeL(r32) -= 1;	mem = rCodeL(r32);	break;
	case 1:	rCodeL(r32) -= 2;	mem = rCodeL(r32);	break;
	case 2:	rCodeL(r32) -= 4;	mem = rCodeL(r32);	break;
	}
}

static void ExInc()
{
	_u8 data = FETCH8;
	_u8 r32 = data & 0xFC;

	cycles_extra = 3;

	switch(data & 3)
	{
	case 0:	mem = rCodeL(r32);	rCodeL(r32) += 1;		break;
	case 1:	mem = rCodeL(r32);	rCodeL(r32) += 2;		break;
	case 2:	mem = rCodeL(r32);	rCodeL(r32) += 4;		break;
	}
}

static void ExRC()
{
	brCode = TRUE;
	rCode = FETCH8;
	cycles_extra = 1;
}

//=========================================================================

//Address Mode & Register Code
void (*decodeExtra[256])() = 
{
/*0*/	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
/*1*/	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
/*2*/	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
/*3*/	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
/*4*/	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
/*5*/	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
/*6*/	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
/*7*/	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
/*8*/	ExXWA,	ExXBC,	ExXDE,	ExXHL,	ExXIX,	ExXIY,	ExXIZ,	ExXSP,
		ExXWAd,	ExXBCd,	ExXDEd,	ExXHLd,	ExXIXd,	ExXIYd,	ExXIZd,	ExXSPd,
/*9*/	ExXWA,	ExXBC,	ExXDE,	ExXHL,	ExXIX,	ExXIY,	ExXIZ,	ExXSP,
		ExXWAd,	ExXBCd,	ExXDEd,	ExXHLd,	ExXIXd,	ExXIYd,	ExXIZd,	ExXSPd,
/*A*/	ExXWA,	ExXBC,	ExXDE,	ExXHL,	ExXIX,	ExXIY,	ExXIZ,	ExXSP,
		ExXWAd,	ExXBCd,	ExXDEd,	ExXHLd,	ExXIXd,	ExXIYd,	ExXIZd,	ExXSPd,
/*B*/	ExXWA,	ExXBC,	ExXDE,	ExXHL,	ExXIX,	ExXIY,	ExXIZ,	ExXSP,
		ExXWAd,	ExXBCd,	ExXDEd,	ExXHLd,	ExXIXd,	ExXIYd,	ExXIZd,	ExXSPd,
/*C*/	Ex8,	Ex16,	Ex24,	ExR32,	ExDec,	ExInc,	0,		ExRC,
		0,		0,		0,		0,		0,		0,		0,		0,
/*D*/	Ex8,	Ex16,	Ex24,	ExR32,	ExDec,	ExInc,	0,		ExRC,
		0,		0,		0,		0,		0,		0,		0,		0,
/*E*/	Ex8,	Ex16,	Ex24,	ExR32,	ExDec,	ExInc,	0,		ExRC,
		0,		0,		0,		0,		0,		0,		0,		0,
/*F*/	Ex8,	Ex16,	Ex24,	ExR32,	ExDec,	ExInc,	0,		0,
		0,		0,		0,		0,		0,		0,		0,		0
};

//=========================================================================

static void e(void)
{
//	instruction_error("Unknown instruction %02X", first);
}

static void es(void)
{
//	instruction_error("Unknown [src] instruction %02X", second);
}

static void ed(void)
{
//	instruction_error("Unknown [dst] instruction %02X", second);
}

static void er(void)
{
//	instruction_error("Unknown [reg] instruction %02X", second);
}

//=========================================================================

//Secondary (SRC) Instruction decode
static void (*srcDecode[256])() = 
{
/*0*/	es,			es,			es,			es,			srcPUSH,	es,			srcRLD,		srcRRD,
		es,			es,			es,			es,			es,			es,			es,			es,
/*1*/	srcLDI,		srcLDIR,	srcLDD,		srcLDDR,	srcCPI,		srcCPIR,	srcCPD,		srcCPDR,
		es,			srcLD16m,	es,			es,			es,			es,			es,			es,
/*2*/	srcLD,		srcLD,		srcLD,		srcLD,		srcLD,		srcLD,		srcLD,		srcLD,
		es,			es,			es,			es,			es,			es,			es,			es,
/*3*/	srcEX,		srcEX,		srcEX,		srcEX,		srcEX,		srcEX,		srcEX,		srcEX,
		srcADDi,	srcADCi,	srcSUBi,	srcSBCi,	srcANDi,	srcXORi,	srcORi,		srcCPi,
/*4*/	srcMUL,		srcMUL,		srcMUL,		srcMUL,		srcMUL,		srcMUL,		srcMUL,		srcMUL,
		srcMULS,	srcMULS,	srcMULS,	srcMULS,	srcMULS,	srcMULS,	srcMULS,	srcMULS,
/*5*/	srcDIV,		srcDIV,		srcDIV,		srcDIV,		srcDIV,		srcDIV,		srcDIV,		srcDIV,
		srcDIVS,	srcDIVS,	srcDIVS,	srcDIVS,	srcDIVS,	srcDIVS,	srcDIVS,	srcDIVS,
/*6*/	srcINC,		srcINC,		srcINC,		srcINC,		srcINC,		srcINC,		srcINC,		srcINC,
		srcDEC,		srcDEC,		srcDEC,		srcDEC,		srcDEC,		srcDEC,		srcDEC,		srcDEC,
/*7*/	es,			es,			es,			es,			es,			es,			es,			es,
		srcRLC,		srcRRC,		srcRL,		srcRR,		srcSLA,		srcSRA,		srcSLL,		srcSRL,
/*8*/	srcADDRm,	srcADDRm,	srcADDRm,	srcADDRm,	srcADDRm,	srcADDRm,	srcADDRm,	srcADDRm,
		srcADDmR,	srcADDmR,	srcADDmR,	srcADDmR,	srcADDmR,	srcADDmR,	srcADDmR,	srcADDmR,
/*9*/	srcADCRm,	srcADCRm,	srcADCRm,	srcADCRm,	srcADCRm,	srcADCRm,	srcADCRm,	srcADCRm,
		srcADCmR,	srcADCmR,	srcADCmR,	srcADCmR,	srcADCmR,	srcADCmR,	srcADCmR,	srcADCmR,
/*A*/	srcSUBRm,	srcSUBRm,	srcSUBRm,	srcSUBRm,	srcSUBRm,	srcSUBRm,	srcSUBRm,	srcSUBRm,
		srcSUBmR,	srcSUBmR,	srcSUBmR,	srcSUBmR,	srcSUBmR,	srcSUBmR,	srcSUBmR,	srcSUBmR,
/*B*/	srcSBCRm,	srcSBCRm,	srcSBCRm,	srcSBCRm,	srcSBCRm,	srcSBCRm,	srcSBCRm,	srcSBCRm,
		srcSBCmR,	srcSBCmR,	srcSBCmR,	srcSBCmR,	srcSBCmR,	srcSBCmR,	srcSBCmR,	srcSBCmR,
/*C*/	srcANDRm,	srcANDRm,	srcANDRm,	srcANDRm,	srcANDRm,	srcANDRm,	srcANDRm,	srcANDRm,
		srcANDmR,	srcANDmR,	srcANDmR,	srcANDmR,	srcANDmR,	srcANDmR,	srcANDmR,	srcANDmR,
/*D*/	srcXORRm,	srcXORRm,	srcXORRm,	srcXORRm,	srcXORRm,	srcXORRm,	srcXORRm,	srcXORRm,
		srcXORmR,	srcXORmR,	srcXORmR,	srcXORmR,	srcXORmR,	srcXORmR,	srcXORmR,	srcXORmR,
/*E*/	srcORRm,	srcORRm,	srcORRm,	srcORRm,	srcORRm,	srcORRm,	srcORRm,	srcORRm,
		srcORmR,	srcORmR,	srcORmR,	srcORmR,	srcORmR,	srcORmR,	srcORmR,	srcORmR,
/*F*/	srcCPRm,	srcCPRm,	srcCPRm,	srcCPRm,	srcCPRm,	srcCPRm,	srcCPRm,	srcCPRm,
		srcCPmR,	srcCPmR,	srcCPmR,	srcCPmR,	srcCPmR,	srcCPmR,	srcCPmR,	srcCPmR
};

//Secondary (DST) Instruction decode
static void (*dstDecode[256])() = 
{
/*0*/	dstLDBi,	ed,			dstLDWi,	ed,			dstPOPB,	ed,			dstPOPW,	ed,
		ed,			ed,			ed,			ed,			ed,			ed,			ed,			ed,
/*1*/	ed,			ed,			ed,			ed,			dstLDBm16,	ed,			dstLDWm16,	ed,
		ed,			ed,			ed,			ed,			ed,			ed,			ed,			ed,
/*2*/	dstLDAW,	dstLDAW,	dstLDAW,	dstLDAW,	dstLDAW,	dstLDAW,	dstLDAW,	dstLDAW,
		dstANDCFA,	dstORCFA,	dstXORCFA,	dstLDCFA,	dstSTCFA,	ed,			ed,			ed,
/*3*/	dstLDAL,	dstLDAL,	dstLDAL,	dstLDAL,	dstLDAL,	dstLDAL,	dstLDAL,	dstLDAL,
		ed,			ed,			ed,			ed,			ed,			ed,			ed,			ed,
/*4*/	dstLDBR,	dstLDBR,	dstLDBR,	dstLDBR,	dstLDBR,	dstLDBR,	dstLDBR,	dstLDBR,
		ed,			ed,			ed,			ed,			ed,			ed,			ed,			ed,
/*5*/	dstLDWR,	dstLDWR,	dstLDWR,	dstLDWR,	dstLDWR,	dstLDWR,	dstLDWR,	dstLDWR,
		ed,			ed,			ed,			ed,			ed,			ed,			ed,			ed,
/*6*/	dstLDLR,	dstLDLR,	dstLDLR,	dstLDLR,	dstLDLR,	dstLDLR,	dstLDLR,	dstLDLR,
		ed,			ed,			ed,			ed,			ed,			ed,			ed,			ed,
/*7*/	ed,			ed,			ed,			ed,			ed,			ed,			ed,			ed,
		ed,			ed,			ed,			ed,			ed,			ed,			ed,			ed,
/*8*/	dstANDCF,	dstANDCF,	dstANDCF,	dstANDCF,	dstANDCF,	dstANDCF,	dstANDCF,	dstANDCF,
		dstORCF,	dstORCF,	dstORCF,	dstORCF,	dstORCF,	dstORCF,	dstORCF,	dstORCF,
/*9*/	dstXORCF,	dstXORCF,	dstXORCF,	dstXORCF,	dstXORCF,	dstXORCF,	dstXORCF,	dstXORCF,
		dstLDCF,	dstLDCF,	dstLDCF,	dstLDCF,	dstLDCF,	dstLDCF,	dstLDCF,	dstLDCF,
/*A*/	dstSTCF,	dstSTCF,	dstSTCF,	dstSTCF,	dstSTCF,	dstSTCF,	dstSTCF,	dstSTCF,	
		dstTSET,	dstTSET,	dstTSET,	dstTSET,	dstTSET,	dstTSET,	dstTSET,	dstTSET,
/*B*/	dstRES,		dstRES,		dstRES,		dstRES,		dstRES,		dstRES,		dstRES,		dstRES,
		dstSET,		dstSET,		dstSET,		dstSET,		dstSET,		dstSET,		dstSET,		dstSET,
/*C*/	dstCHG,		dstCHG,		dstCHG,		dstCHG,		dstCHG,		dstCHG,		dstCHG,		dstCHG,
		dstBIT,		dstBIT,		dstBIT,		dstBIT,		dstBIT,		dstBIT,		dstBIT,		dstBIT,
/*D*/	dstJP,		dstJP,		dstJP,		dstJP,		dstJP,		dstJP,		dstJP,		dstJP,
		dstJP,		dstJP,		dstJP,		dstJP,		dstJP,		dstJP,		dstJP,		dstJP,
/*E*/	dstCALL,	dstCALL,	dstCALL,	dstCALL,	dstCALL,	dstCALL,	dstCALL,	dstCALL,
		dstCALL,	dstCALL,	dstCALL,	dstCALL,	dstCALL,	dstCALL,	dstCALL,	dstCALL,
/*F*/	dstRET,		dstRET,		dstRET,		dstRET,		dstRET,		dstRET,		dstRET,		dstRET,
		dstRET,		dstRET,		dstRET,		dstRET,		dstRET,		dstRET,		dstRET,		dstRET
};

//Secondary (REG) Instruction decode
static void (*regDecode[256])() = 
{
/*0*/	er,			er,			er,			regLDi,		regPUSH,	regPOP,		regCPL,		regNEG,
		regMULi,	regMULSi,	regDIVi,	regDIVSi,	regLINK,	regUNLK,	regBS1F,	regBS1B,
/*1*/	regDAA,		er,			regEXTZ,	regEXTS,	regPAA,		er,			regMIRR,	er,
		er,			regMULA,	er,			er,			regDJNZ,	er,			er,			er,
/*2*/	regANDCFi,	regORCFi,	regXORCFi,	regLDCFi,	regSTCFi,	er,			er,			er,
		regANDCFA,	regORCFA,	regXORCFA,	regLDCFA,	regSTCFA,	er,			regLDCcrr,	regLDCrcr,
/*3*/	regRES,		regSET,		regCHG,		regBIT,		regTSET,	er,			er,			er,
		regMINC1,	regMINC2,	regMINC4,	er,			regMDEC1,	regMDEC2,	regMDEC4,	er,
/*4*/	regMUL,		regMUL,		regMUL,		regMUL,		regMUL,		regMUL,		regMUL,		regMUL,
		regMULS,	regMULS,	regMULS,	regMULS,	regMULS,	regMULS,	regMULS,	regMULS,
/*5*/	regDIV,		regDIV,		regDIV,		regDIV,		regDIV,		regDIV,		regDIV,		regDIV,
		regDIVS,	regDIVS,	regDIVS,	regDIVS,	regDIVS,	regDIVS,	regDIVS,	regDIVS,
/*6*/	regINC,		regINC,		regINC,		regINC,		regINC,		regINC,		regINC,		regINC,
		regDEC,		regDEC,		regDEC,		regDEC,		regDEC,		regDEC,		regDEC,		regDEC,
/*7*/	regSCC,		regSCC,		regSCC,		regSCC,		regSCC,		regSCC,		regSCC,		regSCC,
		regSCC,		regSCC,		regSCC,		regSCC,		regSCC,		regSCC,		regSCC,		regSCC,
/*8*/	regADD,		regADD,		regADD,		regADD,		regADD,		regADD,		regADD,		regADD,
		regLDRr,	regLDRr,	regLDRr,	regLDRr,	regLDRr,	regLDRr,	regLDRr,	regLDRr,
/*9*/	regADC,		regADC,		regADC,		regADC,		regADC,		regADC,		regADC,		regADC,
		regLDrR,	regLDrR,	regLDrR,	regLDrR,	regLDrR,	regLDrR,	regLDrR,	regLDrR,
/*A*/	regSUB,		regSUB,		regSUB,		regSUB,		regSUB,		regSUB,		regSUB,		regSUB,
		regLDr3,	regLDr3,	regLDr3,	regLDr3,	regLDr3,	regLDr3,	regLDr3,	regLDr3,
/*B*/	regSBC,		regSBC,		regSBC,		regSBC,		regSBC,		regSBC,		regSBC,		regSBC,
		regEX,		regEX,		regEX,		regEX,		regEX,		regEX,		regEX,		regEX,
/*C*/	regAND,		regAND,		regAND,		regAND,		regAND,		regAND,		regAND,		regAND,
		regADDi,	regADCi,	regSUBi,	regSBCi,	regANDi,	regXORi,	regORi,		regCPi,
/*D*/	regXOR,		regXOR,		regXOR,		regXOR,		regXOR,		regXOR,		regXOR,		regXOR,
		regCPr3,	regCPr3,	regCPr3,	regCPr3,	regCPr3,	regCPr3,	regCPr3,	regCPr3,
/*E*/	regOR,		regOR,		regOR,		regOR,		regOR,		regOR,		regOR,		regOR,
		regRLCi,	regRRCi,	regRLi,		regRRi,		regSLAi,	regSRAi,	regSLLi,	regSRLi,
/*F*/	regCP,		regCP,		regCP,		regCP,		regCP,		regCP,		regCP,		regCP,
		regRLCA,	regRRCA,	regRLA,		regRRA,		regSLAA,	regSRAA,	regSLLA,	regSRLA
};

//=========================================================================

static void src_B()
{
	second = FETCH8;			//Get the second opcode
	R = second & 7;
	size = 0;					//Byte Size

	(*srcDecode[second])();		//Call
}

static void src_W()
{
	second = FETCH8;			//Get the second opcode
	R = second & 7;
	size = 1;					//Word Size

	(*srcDecode[second])();		//Call
}

static void src_L()
{
	second = FETCH8;			//Get the second opcode
	R = second & 7;
	size = 2;					//Long Size

	(*srcDecode[second])();		//Call
}

static void dst()
{
	second = FETCH8;			//Get the second opcode
	R = second & 7;

	(*dstDecode[second])();		//Call
}

static _u8 rCodeConversionB[8] = { 0xE1, 0xE0, 0xE5, 0xE4, 0xE9, 0xE8, 0xED, 0xEC };
static _u8 rCodeConversionW[8] = { 0xE0, 0xE4, 0xE8, 0xEC, 0xF0, 0xF4, 0xF8, 0xFC };
static _u8 rCodeConversionL[8] = { 0xE0, 0xE4, 0xE8, 0xEC, 0xF0, 0xF4, 0xF8, 0xFC };

static void reg_B()
{
	second = FETCH8;			//Get the second opcode
	R = second & 7;
	size = 0;					//Byte Size

	if (brCode == FALSE)
	{
		brCode = TRUE;
		rCode = rCodeConversionB[first & 7];
	}

	(*regDecode[second])();		//Call
}

static void reg_W()
{
	second = FETCH8;			//Get the second opcode
	R = second & 7;
	size = 1;					//Word Size

	if (brCode == FALSE)
	{
		brCode = TRUE;
		rCode = rCodeConversionW[first & 7];
	}

	(*regDecode[second])();		//Call
}

static void reg_L()
{
	second = FETCH8;			//Get the second opcode
	R = second & 7;
	size = 2;					//Long Size

	if (brCode == FALSE)
	{
		brCode = TRUE;
		rCode = rCodeConversionL[first & 7];
	}

	(*regDecode[second])();		//Call
}

//=============================================================================

//Primary Instruction decode
void (*decode[256])() = 
{
/*0*/	sngNOP,		sngNORMAL,	sngPUSHSR,	sngPOPSR,	sngMAX,		sngHALT,	sngEI,		sngRETI,
		sngLD8_8,	sngPUSH8,	sngLD8_16,	sngPUSH16,	sngINCF,	sngDECF,	sngRET,		sngRETD,
/*1*/	sngRCF,		sngSCF,		sngCCF,		sngZCF,		sngPUSHA,	sngPOPA,	sngEX,		sngLDF,
		sngPUSHF,	sngPOPF,	sngJP16,	sngJP24,	sngCALL16,	sngCALL24,	sngCALR,	iBIOSHLE,
/*2*/	sngLDB,		sngLDB,		sngLDB,		sngLDB,		sngLDB,		sngLDB,		sngLDB,		sngLDB,
		sngPUSHW,	sngPUSHW,	sngPUSHW,	sngPUSHW,	sngPUSHW,	sngPUSHW,	sngPUSHW,	sngPUSHW,
/*3*/	sngLDW,		sngLDW,		sngLDW,		sngLDW,		sngLDW,		sngLDW,		sngLDW,		sngLDW,
		sngPUSHL,	sngPUSHL,	sngPUSHL,	sngPUSHL,	sngPUSHL,	sngPUSHL,	sngPUSHL,	sngPUSHL,
/*4*/	sngLDL,		sngLDL,		sngLDL,		sngLDL,		sngLDL,		sngLDL,		sngLDL,		sngLDL,
		sngPOPW,	sngPOPW,	sngPOPW,	sngPOPW,	sngPOPW,	sngPOPW,	sngPOPW,	sngPOPW,
/*5*/	e,			e,			e,			e,			e,			e,			e,			e,
		sngPOPL,	sngPOPL,	sngPOPL,	sngPOPL,	sngPOPL,	sngPOPL,	sngPOPL,	sngPOPL,
/*6*/	sngJR,		sngJR,		sngJR,		sngJR,		sngJR,		sngJR,		sngJR,		sngJR,
		sngJR,		sngJR,		sngJR,		sngJR,		sngJR,		sngJR,		sngJR,		sngJR,
/*7*/	sngJRL,		sngJRL,		sngJRL,		sngJRL,		sngJRL,		sngJRL,		sngJRL,		sngJRL,
		sngJRL,		sngJRL,		sngJRL,		sngJRL,		sngJRL,		sngJRL,		sngJRL,		sngJRL,
/*8*/	src_B,		src_B,		src_B,		src_B,		src_B,		src_B,		src_B,		src_B,
		src_B,		src_B,		src_B,		src_B,		src_B,		src_B,		src_B,		src_B,
/*9*/	src_W,		src_W,		src_W,		src_W,		src_W,		src_W,		src_W,		src_W,
		src_W,		src_W,		src_W,		src_W,		src_W,		src_W,		src_W,		src_W,
/*A*/	src_L,		src_L,		src_L,		src_L,		src_L,		src_L,		src_L,		src_L,
		src_L,		src_L,		src_L,		src_L,		src_L,		src_L,		src_L,		src_L,
/*B*/	dst,		dst,		dst,		dst,		dst,		dst,		dst,		dst,
		dst,		dst,		dst,		dst,		dst,		dst,		dst,		dst,
/*C*/	src_B,		src_B,		src_B,		src_B,		src_B,		src_B,		e,			reg_B,
		reg_B,		reg_B,		reg_B,		reg_B,		reg_B,		reg_B,		reg_B,		reg_B,
/*D*/	src_W,		src_W,		src_W,		src_W,		src_W,		src_W,		e,			reg_W,
		reg_W,		reg_W,		reg_W,		reg_W,		reg_W,		reg_W,		reg_W,		reg_W,
/*E*/	src_L,		src_L,		src_L,		src_L,		src_L,		src_L,		e,			reg_L,
		reg_L,		reg_L,		reg_L,		reg_L,		reg_L,		reg_L,		reg_L,		reg_L,
/*F*/	dst,		dst,		dst,		dst,		dst,		dst,		e,			sngLDX,
		sngSWI,		sngSWI,		sngSWI,		sngSWI,		sngSWI,		sngSWI,		sngSWI,		sngSWI
};

//=============================================================================

_u8 TLCS900h_interpret(void)
{
	brCode = FALSE;

	first = FETCH8;	//Get the first byte

	//Is any extra data used by this instruction?
	cycles_extra = 0;
	if (decodeExtra[first])
		(*decodeExtra[first])();

	(*decode[first])();	//Decode

	return cycles + cycles_extra;
}

//=============================================================================