/*  ZeroGS KOSMOS
 *  Copyright (C) 2005-2006 zerorog@gmail.com
 *
 *  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.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

#include "GS.h"
#include "Mem.h"
#include "Regs.h"

#include "zerogs.h"
#include "targets.h"

const u32 g_primmult[8] = { 1, 2, 2, 3, 3, 3, 2, 0xff };
const u32 g_primsub[8] = { 1, 2, 1, 3, 1, 1, 2, 0 };

#ifdef _MSC_VER
#pragma warning(disable:4244)
#endif

GIFRegHandler g_GIFPackedRegHandlers[16] = {
	GIFRegHandlerPRIM,		  GIFPackedRegHandlerRGBA,	GIFPackedRegHandlerSTQ, GIFPackedRegHandlerUV,
	GIFPackedRegHandlerXYZF2,   GIFPackedRegHandlerXYZ2,	GIFRegHandlerTEX0_1,	GIFRegHandlerTEX0_2,
	GIFRegHandlerCLAMP_1,	   GIFRegHandlerCLAMP_2,	   GIFPackedRegHandlerFOG, GIFPackedRegHandlerNull,
	GIFRegHandlerXYZF3,		 GIFRegHandlerXYZ3,		  GIFPackedRegHandlerA_D, GIFPackedRegHandlerNOP };

GIFRegHandler g_GIFRegHandlers[] = {
	GIFRegHandlerPRIM,	  GIFRegHandlerRGBAQ,	 GIFRegHandlerST,		GIFRegHandlerUV,
	GIFRegHandlerXYZF2,	 GIFRegHandlerXYZ2,	  GIFRegHandlerTEX0_1,	GIFRegHandlerTEX0_2,
	GIFRegHandlerCLAMP_1,   GIFRegHandlerCLAMP_2,   GIFRegHandlerFOG,	   GIFRegHandlerNull,
	GIFRegHandlerXYZF3,	 GIFRegHandlerXYZ3,	  GIFRegHandlerNOP,	   GIFRegHandlerNOP,
	GIFRegHandlerNull,	  GIFRegHandlerNull,	  GIFRegHandlerNull,	  GIFRegHandlerNull,
	GIFRegHandlerTEX1_1,	GIFRegHandlerTEX1_2,	GIFRegHandlerTEX2_1,	GIFRegHandlerTEX2_2,
	GIFRegHandlerXYOFFSET_1,GIFRegHandlerXYOFFSET_2,GIFRegHandlerPRMODECONT,GIFRegHandlerPRMODE,
	GIFRegHandlerTEXCLUT,   GIFRegHandlerNull,	  GIFRegHandlerNull,	  GIFRegHandlerNull,
	GIFRegHandlerNull,	  GIFRegHandlerNull,	  GIFRegHandlerSCANMSK,   GIFRegHandlerNull,
	GIFRegHandlerNull,	  GIFRegHandlerNull,	  GIFRegHandlerNull,	  GIFRegHandlerNull,
	GIFRegHandlerNull,	  GIFRegHandlerNull,	  GIFRegHandlerNull,	  GIFRegHandlerNull,
	GIFRegHandlerNull,	  GIFRegHandlerNull,	  GIFRegHandlerNull,	  GIFRegHandlerNull,
	GIFRegHandlerNull,	  GIFRegHandlerNull,	  GIFRegHandlerNull,	  GIFRegHandlerNull,
	GIFRegHandlerMIPTBP1_1, GIFRegHandlerMIPTBP1_2, GIFRegHandlerMIPTBP2_1, GIFRegHandlerMIPTBP2_2,
	GIFRegHandlerNull,	  GIFRegHandlerNull,	  GIFRegHandlerNull,	  GIFRegHandlerTEXA,
	GIFRegHandlerNull,	  GIFRegHandlerFOGCOL,	GIFRegHandlerNull,	  GIFRegHandlerTEXFLUSH,
	GIFRegHandlerSCISSOR_1, GIFRegHandlerSCISSOR_2, GIFRegHandlerALPHA_1,   GIFRegHandlerALPHA_2,
	GIFRegHandlerDIMX,	  GIFRegHandlerDTHE,	  GIFRegHandlerCOLCLAMP,  GIFRegHandlerTEST_1,
	GIFRegHandlerTEST_2,	GIFRegHandlerPABE,	  GIFRegHandlerFBA_1,	 GIFRegHandlerFBA_2,
	GIFRegHandlerFRAME_1,   GIFRegHandlerFRAME_2,   GIFRegHandlerZBUF_1,	GIFRegHandlerZBUF_2,
	GIFRegHandlerBITBLTBUF, GIFRegHandlerTRXPOS,	GIFRegHandlerTRXREG,	GIFRegHandlerTRXDIR,
	GIFRegHandlerHWREG,	 GIFRegHandlerNull,	  GIFRegHandlerNull,	  GIFRegHandlerNull,
	GIFRegHandlerNull,	  GIFRegHandlerNull,	  GIFRegHandlerNull,	  GIFRegHandlerNull,
	GIFRegHandlerNull,	  GIFRegHandlerNull,	  GIFRegHandlerNull,	  GIFRegHandlerNull,
	GIFRegHandlerSIGNAL,	GIFRegHandlerFINISH,	GIFRegHandlerLABEL,	 GIFRegHandlerNull };

C_ASSERT(sizeof(g_GIFRegHandlers)/sizeof(g_GIFRegHandlers[0]) == 100 );

// values for keeping track of changes
u32 s_uTex1Data[2][2] = {0}, s_uClampData[2] = {0};

void __fastcall GIFPackedRegHandlerNull(u32* data)
{
	DEBUG_LOG("Unexpected packed reg handler %8.8lx_%8.8lx %x\n", data[0], data[1], data[2]);
}

void __fastcall GIFPackedRegHandlerRGBA(u32* data)
{
	gs.rgba = (data[0] & 0xff) |
			((data[1] & 0xff) <<  8) |
			((data[2] & 0xff) << 16) |
			((data[3] & 0xff) << 24);
	gs.vertexregs.rgba = gs.rgba;
	gs.vertexregs.q = gs.q;
}

void __fastcall GIFPackedRegHandlerSTQ(u32* data)
{
	*(u32*)&gs.vertexregs.s = data[0]&0xffffff00;
	*(u32*)&gs.vertexregs.t = data[1]&0xffffff00;
	*(u32*)&gs.q = data[2];
}

void __fastcall GIFPackedRegHandlerUV(u32* data)
{
	gs.vertexregs.u = data[0] & 0x3fff;
	gs.vertexregs.v = data[1] & 0x3fff;
}

void __forceinline KICK_VERTEX2()
{
	if (++gs.primC >= (int)g_primmult[prim->prim])
	{
		if (!(g_GameSettings&GAME_XENOSPECHACK) || !ZeroGS::vb[prim->ctxt].zbuf.zmsk)
			(*ZeroGS::drawfn[prim->prim])();
		gs.primC -= g_primsub[prim->prim];
	}
}

void __forceinline KICK_VERTEX3()
{
	if (++gs.primC >= (int)g_primmult[prim->prim])
	{
		gs.primC -= g_primsub[prim->prim];
		if (prim->prim == 5)
		{
			/* tri fans need special processing */
			if (gs.nTriFanVert == gs.primIndex)
				gs.primIndex = (gs.primIndex+1)%ArraySize(gs.gsvertex);
		}
	}
}

void __fastcall GIFPackedRegHandlerXYZF2(u32* data)
{
	gs.vertexregs.x = (data[0] >> 0) & 0xffff;
	gs.vertexregs.y = (data[1] >> 0) & 0xffff;
	gs.vertexregs.z = (data[2] >> 4) & 0xffffff;
	gs.vertexregs.f = (data[3] >> 4) & 0xff;
	gs.gsvertex[gs.primIndex] = gs.vertexregs;
	gs.primIndex = (gs.primIndex+1)%ArraySize(gs.gsvertex);

	if( data[3] & 0x8000 ) {
		KICK_VERTEX3();
	}
	else {
		KICK_VERTEX2();
	}
}

void __fastcall GIFPackedRegHandlerXYZ2(u32* data)
{
	gs.vertexregs.x = (data[0] >> 0) & 0xffff;
	gs.vertexregs.y = (data[1] >> 0) & 0xffff;
	gs.vertexregs.z = data[2];
	gs.gsvertex[gs.primIndex] = gs.vertexregs;
	gs.primIndex = (gs.primIndex+1)%ArraySize(gs.gsvertex);

	if( data[3] & 0x8000 ) {
		KICK_VERTEX3();
	}
	else {
		KICK_VERTEX2();
	}
}

void __fastcall GIFPackedRegHandlerFOG(u32* data)
{
	gs.vertexregs.f = (data[3]&0xff0)>>4;
}

void __fastcall GIFPackedRegHandlerA_D(u32* data)
{
	if((data[2] & 0xff) < 100)
		g_GIFRegHandlers[data[2] & 0xff](data);
	else
		GIFRegHandlerNull(data);
}

void __fastcall GIFPackedRegHandlerNOP(u32* data)
{
}

extern int g_PrevBitwiseTexX, g_PrevBitwiseTexY;

void tex0Write(int i, u32 *data)
{
	u32 psm = (data[0] >> 20) & 0x3f;
	if( psm == 9 ) psm = 1; // hmm..., ffx intro menu

	if( m_Blocks[psm].bpp == 0 ) {
		// kh and others
		return;
	}

	ZeroGS::vb[i].uNextTex0Data[0] = data[0];
	ZeroGS::vb[i].uNextTex0Data[1] = data[1];
	ZeroGS::vb[i].bNeedTexCheck = 1;

	// don't update unless necessary
	if( PSMT_ISCLUT(psm) ) {
		if( ZeroGS::CheckChangeInClut(data[1], psm) ) {
			// loading clut, so flush whole texture
			ZeroGS::vb[i].FlushTexData();
		}
		// check if csa is the same!! (ffx bisaid island, grass)
		else if( (data[1]&0x1f780000) != (ZeroGS::vb[i].uCurTex0Data[1]&0x1f780000) ) {
			ZeroGS::Flush(i); // flush any previous entries
		}
	}
}

void tex2Write(int i, u32 *data)
{
	tex0Info& tex0 = ZeroGS::vb[i].tex0;

	if( ZeroGS::vb[i].bNeedTexCheck )
		ZeroGS::vb[i].FlushTexData();

	u32 psm = (data[0] >> 20) & 0x3f;
	if( psm == 9 ) psm = 1; // hmm..., ffx intro menu

	u32* s_uTex0Data = ZeroGS::vb[i].uCurTex0Data;

	// don't update unless necessary
	if( (s_uTex0Data[0]&0x03f00000) == (data[0]&0x03f00000) ) { // psm is the same

		if( PSMT_ISCLUT(psm) ) {
			// have to write the CLUT again if changed
			if( (s_uTex0Data[1]&0x1fffffe0) == (data[1]&0x1fffffe0) ) {

				if( data[1]&0xe0000000 ) {
					tex0.cld = (data[1]>>29)&7;
					ZeroGS::texClutWrite(i);
					// invalidate to make sure target didn't change!
					ZeroGS::vb[i].bVarsTexSync = FALSE;
				}

				return;
			}

			// CSAs have to be the same!
//		  if( (data[1]&0xe0000000) == 0 ) {
//
//			  if( (s_uTex0Data[1]&0x1f100000) != (data[1]&0x1f100000) )
//				  ZeroGS::Flush(i);
//
//			  // clut isn't going to be loaded so can ignore, but at least update CSA and CPSM!
//			  ZeroGS::vb[i].uCurTex0Data[1] = (ZeroGS::vb[i].uCurTex0Data[1]&0xe087ffff)|(data[1]&0x1f780000);
//
//			  if( ZeroGS::vb[i].tex0.cpsm <= 1 ) ZeroGS::vb[i].tex0.csa  = (data[1] >> 24) & 0xf;
//			  else ZeroGS::vb[i].tex0.csa  =  (data[1] >> 24) & 0x1f;
//
//			  ZeroGS::vb[i].tex0.cpsm = (data[1] >> 19) & 0xe;
//
//			  ZeroGS::vb[i].bVarsTexSync = FALSE;
//			  return;
//		  }

			// fall through
		}
		else {
			//ZeroGS::vb[i].bVarsTexSync = FALSE;
			return;
		}
	}

	ZeroGS::Flush(i);
	ZeroGS::vb[i].bVarsTexSync = FALSE;
	ZeroGS::vb[i].bTexConstsSync = FALSE;

	s_uTex0Data[0] = (s_uTex0Data[0]&~0x03f00000)|(psm<<20);
	s_uTex0Data[1] = (s_uTex0Data[1]&0x1f)|(data[1]&~0x1f);

	tex0.psm  = psm;

	if( PSMT_ISCLUT(tex0.psm) ) {
		tex0.cbp  = (data[1] >>  5) & 0x3fff;
		tex0.cpsm = (data[1] >> 19) & 0xe;
		tex0.csm  = (data[1] >> 23) & 0x1;

		if( tex0.cpsm <= 1 ) tex0.csa = (data[1] >> 24) & 0xf;
		else tex0.csa = (data[1] >> 24) & 0x1f;

		tex0.cld  = (data[1] >> 29) & 0x7;
		ZeroGS::texClutWrite(i);
	}
}

__forceinline void frameWrite(int i, u32 *data)
{
	frameInfo& gsfb = ZeroGS::vb[i].gsfb;

	if( (gsfb.fbp == ((data[0]	  ) & 0x1ff) * 32) &&
	(gsfb.fbw == ((data[0] >> 16) & 0x3f) * 64) &&
	gsfb.psm ==  ((data[0] >> 24) & 0x3f) &&
		(gsfb.fbm == data[1]) ) {
		return;
	}

	ZeroGS::Flush(0);
	ZeroGS::Flush(1);

	gsfb.fbp = ((data[0]	  ) & 0x1ff) * 32;
	gsfb.fbw = ((data[0] >> 16) & 0x3f) * 64;
	gsfb.psm =  (data[0] >> 24) & 0x3f;
	gsfb.fbm = data[1];

	if (gsfb.fbw > 0) {

		gsfb.fbh = (1024*1024-64*gsfb.fbp) / gsfb.fbw;
		gsfb.fbh &= ~0x1f;
		if( gsfb.psm & 2 )
			gsfb.fbh *= 2;
		if( gsfb.fbh > 1024 ) gsfb.fbh = 1024;
	}
	else gsfb.fbh = 0;

	if( gsfb.psm == 1 ) gsfb.fbm |= 0xff000000;
	else if( gsfb.psm & 2 ) {

	}

	ZeroGS::vb[i].bNeedFrameCheck = 1;
}

__forceinline void testWrite(int i, u32 *data)
{
	pixTest* test = &ZeroGS::vb[i].test;

	if( (*(u32*)test & 0x0007ffff) == (data[0] & 0x0007ffff) )
		return;

	ZeroGS::Flush(i);
	*(u32*)test = data[0];

//  test.ate   = (data[0]	  ) & 0x1;
//  test.atst  = (data[0] >>  1) & 0x7;
//  test.aref  = (data[0] >>  4) & 0xff;
//  test.afail = (data[0] >> 12) & 0x3;
//  test.date  = (data[0] >> 14) & 0x1;
//  test.datm  = (data[0] >> 15) & 0x1;
//  test.zte   = (data[0] >> 16) & 0x1;
//  test.ztst  = (data[0] >> 17) & 0x3;
}

__forceinline void clampWrite(int i, u32 *data)
{
	clampInfo& clamp = ZeroGS::vb[i].clamp;

	if( s_uClampData[i] != data[0] || ((clamp.minv>>8)|(clamp.maxv<<2)) != (data[1]&0x0fff) ) {

//	  if( ZeroGS::vb[i].bNeedTexCheck )
//		  ZeroGS::vb[i].FlushTexData();

		ZeroGS::Flush(i);
		s_uClampData[i] = data[0];

		clamp.wms  = (data[0]	  ) & 0x3;
		clamp.wmt  = (data[0] >>  2) & 0x3;
		clamp.minu = (data[0] >>  4) & 0x3ff;
		clamp.maxu = (data[0] >> 14) & 0x3ff;
		clamp.minv =((data[0] >> 24) & 0xff) | ((data[1] & 0x3) << 8);
		clamp.maxv = (data[1] >> 2) & 0x3ff;

		ZeroGS::vb[i].bTexConstsSync = FALSE;
	}
}

void __fastcall GIFRegHandlerNull(u32* data)
{
#ifdef _DEBUG
	if( (((uptr)&data[2])&0xffff) == 0 )
		return;

	// 0x7f happens on a lot of games
	if( data[2] != 0x7f && (data[0] || data[1]) ) {
		DEBUG_LOG("Unexpected reg handler %x %x %x\n", data[0], data[1], data[2]);
	}
#endif
}

void __fastcall GIFRegHandlerPRIM(u32 *data)
{
	if (data[0] & ~0x3ff) {
		//WARN_LOG("warning: unknown bits in prim %8.8lx_%8.8lx\n", data[1], data[0]);
	}

	gs.nTriFanVert = gs.primIndex;
	gs.primC = 0;
	prim->prim = (data[0]) & 0x7;
	gs._prim[0].prim = (data[0]) & 0x7;
	gs._prim[1].prim = (data[0]) & 0x7;
	gs._prim[1]._val = (data[0]>>3)&0xff;

	ZeroGS::Prim();
}

void __fastcall GIFRegHandlerRGBAQ(u32* data)
{
	gs.rgba = data[0];
	gs.vertexregs.rgba = data[0];
	*(u32*)&gs.vertexregs.q = data[1];
}

void __fastcall GIFRegHandlerST(u32* data)
{
	*(u32*)&gs.vertexregs.s = data[0]&0xffffff00;
	*(u32*)&gs.vertexregs.t = data[1]&0xffffff00;
	//*(u32*)&gs.q = data[2];
}

void __fastcall GIFRegHandlerUV(u32* data)
{
	gs.vertexregs.u = (data[0]) & 0x3fff;
	gs.vertexregs.v = (data[0] >> 16) & 0x3fff;
}

void __fastcall GIFRegHandlerXYZF2(u32* data)
{
	gs.vertexregs.x = (data[0]) & 0xffff;
	gs.vertexregs.y = (data[0] >> (16)) & 0xffff;
	gs.vertexregs.z = data[1] & 0xffffff;
	gs.vertexregs.f = data[1] >> 24;
	gs.gsvertex[gs.primIndex] = gs.vertexregs;
	gs.primIndex = (gs.primIndex+1)%ARRAY_SIZE(gs.gsvertex);

	KICK_VERTEX2();
}

void __fastcall GIFRegHandlerXYZ2(u32* data)
{
	gs.vertexregs.x = (data[0]) & 0xffff;
	gs.vertexregs.y = (data[0] >> (16)) & 0xffff;
	gs.vertexregs.z = data[1];
	gs.gsvertex[gs.primIndex] = gs.vertexregs;
	gs.primIndex = (gs.primIndex+1)%ARRAY_SIZE(gs.gsvertex);

	KICK_VERTEX2();
}

void __fastcall GIFRegHandlerTEX0_1(u32* data)
{
	if( (g_GameSettings&GAME_XENOSPECHACK) && ZeroGS::vb[0].zbuf.zmsk ) {
		return;
	}
	tex0Write(0, data);
}

void __fastcall GIFRegHandlerTEX0_2(u32* data)
{
	if( (g_GameSettings&GAME_XENOSPECHACK) && ZeroGS::vb[1].zbuf.zmsk ) {
		return;
	}
	tex0Write(1, data);
}

void __fastcall GIFRegHandlerCLAMP_1(u32* data)
{
	if( (g_GameSettings&GAME_XENOSPECHACK) && ZeroGS::vb[0].zbuf.zmsk ) {
		return;
	}
	clampWrite(0, data);
}

void __fastcall GIFRegHandlerCLAMP_2(u32* data)
{
	if( (g_GameSettings&GAME_XENOSPECHACK) && ZeroGS::vb[1].zbuf.zmsk ) {
		return;
	}
	clampWrite(1, data);
}

void __fastcall GIFRegHandlerFOG(u32* data)
{
	//gs.gsvertex[gs.primIndex].f = (data[1] >> 24);	// shift to upper bits
	gs.vertexregs.f = data[1]>>24;
}

void __fastcall GIFRegHandlerXYZF3(u32* data)
{
	gs.vertexregs.x = (data[0]) & 0xffff;
	gs.vertexregs.y = (data[0] >> (16)) & 0xffff;
	gs.vertexregs.z = data[1] & 0xffffff;
	gs.vertexregs.f = data[1] >> 24;
	gs.gsvertex[gs.primIndex] = gs.vertexregs;
	gs.primIndex = (gs.primIndex+1)%ARRAY_SIZE(gs.gsvertex);

	KICK_VERTEX3();
}

void __fastcall GIFRegHandlerXYZ3(u32* data)
{
	gs.vertexregs.x = (data[0]) & 0xffff;
	gs.vertexregs.y = (data[0] >> (16)) & 0xffff;
	gs.vertexregs.z = data[1];
	gs.gsvertex[gs.primIndex] = gs.vertexregs;
	gs.primIndex = (gs.primIndex+1)%ARRAY_SIZE(gs.gsvertex);

	KICK_VERTEX3();
}

void __fastcall GIFRegHandlerNOP(u32* data)
{
}

void tex1Write(int i, u32* data)
{
	tex1Info& tex1 = ZeroGS::vb[i].tex1;

	if( conf.bilinear == 1 && (tex1.mmag != ((data[0] >>  5) & 0x1) || tex1.mmin != ((data[0] >>  6) & 0x7)) ) {
		ZeroGS::Flush(i);
		ZeroGS::vb[i].bVarsTexSync = FALSE;
	}
	tex1.lcm  = (data[0]	  ) & 0x1;
	tex1.mxl  = (data[0] >>  2) & 0x7;
	tex1.mmag = (data[0] >>  5) & 0x1;
	tex1.mmin = (data[0] >>  6) & 0x7;
	tex1.mtba = (data[0] >>  9) & 0x1;
	tex1.l	= (data[0] >> 19) & 0x3;
	tex1.k	= (data[1] >> 4) & 0xff;
}

void __fastcall GIFRegHandlerTEX1_1(u32* data)
{
	if( (g_GameSettings&GAME_XENOSPECHACK) && ZeroGS::vb[0].zbuf.zmsk ) {
		return;
	}

	tex1Write(0, data);
}

void __fastcall GIFRegHandlerTEX1_2(u32* data)
{
	if( (g_GameSettings&GAME_XENOSPECHACK) && ZeroGS::vb[1].zbuf.zmsk )
		return;

	tex1Write(1, data);
}

void __fastcall GIFRegHandlerTEX2_1(u32* data)
{
	tex2Write(0, data);
}

void __fastcall GIFRegHandlerTEX2_2(u32* data)
{
	tex2Write(1, data);
}

void __fastcall GIFRegHandlerXYOFFSET_1(u32* data)
{
	// eliminator low 4 bits for now
	ZeroGS::vb[0].offset.x = (data[0]) & 0xffff;
	ZeroGS::vb[0].offset.y = (data[1]) & 0xffff;

//  if( !conf.interlace ) {
//	  ZeroGS::vb[0].offset.x &= ~15;
//	  ZeroGS::vb[0].offset.y &= ~15;
//  }
}

void __fastcall GIFRegHandlerXYOFFSET_2(u32* data)
{
	ZeroGS::vb[1].offset.x = (data[0]) & 0xffff;
	ZeroGS::vb[1].offset.y = (data[1]) & 0xffff;

//  if( !conf.interlace ) {
//	  ZeroGS::vb[1].offset.x &= ~15;
//	  ZeroGS::vb[1].offset.y &= ~15;
//  }
}

void __fastcall GIFRegHandlerPRMODECONT(u32* data)
{
	gs.prac = data[0] & 0x1;
	prim = &gs._prim[gs.prac];

	ZeroGS::Prim();
}

void __fastcall GIFRegHandlerPRMODE(u32* data)
{
	gs._prim[0]._val = (data[0]>>3)&0xff;

	if (gs.prac == 0)
		ZeroGS::Prim();
}

void __fastcall GIFRegHandlerTEXCLUT(u32* data)
{
	if( ZeroGS::vb[0].bNeedTexCheck )
		ZeroGS::vb[0].FlushTexData();
	if( ZeroGS::vb[1].bNeedTexCheck )
		ZeroGS::vb[1].FlushTexData();
	gs.clut.cbw = ((data[0]	  ) & 0x3f) * 64;
	gs.clut.cou = ((data[0] >>  6) & 0x3f) * 16;
	gs.clut.cov = (data[0] >> 12) & 0x3ff;
}

void __fastcall GIFRegHandlerSCANMSK(u32* data)
{
//  ZeroGS::Flush(0);
//  ZeroGS::Flush(1);
//  ZeroGS::ResolveC(&ZeroGS::vb[0]);
//  ZeroGS::ResolveZ(&ZeroGS::vb[0]);

	gs.smask = data[0] & 0x3;
}

void __fastcall GIFRegHandlerMIPTBP1_1(u32* data)
{
	miptbpInfo& miptbp0 = ZeroGS::vb[0].miptbp0;
	miptbp0.tbp[0] = (data[0]	  ) & 0x3fff;
	miptbp0.tbw[0] = (data[0] >> 14) & 0x3f;
	miptbp0.tbp[1] = ((data[0] >> 20) & 0xfff) | ((data[1] & 0x3) << 12);
	miptbp0.tbw[1] = (data[1] >>  2) & 0x3f;
	miptbp0.tbp[2] = (data[1] >>  8) & 0x3fff;
	miptbp0.tbw[2] = (data[1] >> 22) & 0x3f;
}

void __fastcall GIFRegHandlerMIPTBP1_2(u32* data)
{
	miptbpInfo& miptbp0 = ZeroGS::vb[1].miptbp0;
	miptbp0.tbp[0] = (data[0]	  ) & 0x3fff;
	miptbp0.tbw[0] = (data[0] >> 14) & 0x3f;
	miptbp0.tbp[1] = ((data[0] >> 20) & 0xfff) | ((data[1] & 0x3) << 12);
	miptbp0.tbw[1] = (data[1] >>  2) & 0x3f;
	miptbp0.tbp[2] = (data[1] >>  8) & 0x3fff;
	miptbp0.tbw[2] = (data[1] >> 22) & 0x3f;
}

void __fastcall GIFRegHandlerMIPTBP2_1(u32* data)
{
	miptbpInfo& miptbp1 = ZeroGS::vb[0].miptbp1;
	miptbp1.tbp[0] = (data[0]	  ) & 0x3fff;
	miptbp1.tbw[0] = (data[0] >> 14) & 0x3f;
	miptbp1.tbp[1] = ((data[0] >> 20) & 0xfff) | ((data[1] & 0x3) << 12);
	miptbp1.tbw[1] = (data[1] >>  2) & 0x3f;
	miptbp1.tbp[2] = (data[1] >>  8) & 0x3fff;
	miptbp1.tbw[2] = (data[1] >> 22) & 0x3f;
}

void __fastcall GIFRegHandlerMIPTBP2_2(u32* data)
{
	miptbpInfo& miptbp1 = ZeroGS::vb[1].miptbp1;
	miptbp1.tbp[0] = (data[0]	  ) & 0x3fff;
	miptbp1.tbw[0] = (data[0] >> 14) & 0x3f;
	miptbp1.tbp[1] = ((data[0] >> 20) & 0xfff) | ((data[1] & 0x3) << 12);
	miptbp1.tbw[1] = (data[1] >>  2) & 0x3f;
	miptbp1.tbp[2] = (data[1] >>  8) & 0x3fff;
	miptbp1.tbw[2] = (data[1] >> 22) & 0x3f;
}

void __fastcall GIFRegHandlerTEXA(u32* data)
{
	texaInfo newinfo;
	newinfo.aem = (data[0] >> 15) & 0x1;
	newinfo.ta[0] = data[0] & 0xff;
	newinfo.ta[1] = data[1] & 0xff;

	if( *(u32*)&newinfo != *(u32*)&gs.texa ) {
		ZeroGS::Flush(0);
		ZeroGS::Flush(1);
		*(u32*)&gs.texa = *(u32*)&newinfo;
		gs.texa.fta[0] = newinfo.ta[0]/255.0f;
		gs.texa.fta[1] = newinfo.ta[1]/255.0f;

		ZeroGS::vb[0].bTexConstsSync = FALSE;
		ZeroGS::vb[1].bTexConstsSync = FALSE;
	}
}

void __fastcall GIFRegHandlerFOGCOL(u32* data)
{
	ZeroGS::SetFogColor(data[0]&0xffffff);
}

void __fastcall GIFRegHandlerTEXFLUSH(u32* data)
{
	ZeroGS::SetTexFlush();
}

void __fastcall GIFRegHandlerSCISSOR_1(u32* data)
{
	Rect2& scissor = ZeroGS::vb[0].scissor;

	Rect2 newscissor;

	newscissor.x0 = ((data[0]	  ) & 0x7ff) << 3;
	newscissor.x1 = ((data[0] >> 16) & 0x7ff) << 3;
	newscissor.y0 = ((data[1]	  ) & 0x7ff) << 3;
	newscissor.y1 = ((data[1] >> 16) & 0x7ff) << 3;

	if( newscissor.x1 != scissor.x1 || newscissor.y1 != scissor.y1 ||
		newscissor.x0 != scissor.x0 || newscissor.y0 != scissor.y0 ) {

		ZeroGS::Flush(0);
		scissor = newscissor;

		ZeroGS::vb[0].bNeedFrameCheck = 1;
	}
}

void __fastcall GIFRegHandlerSCISSOR_2(u32* data)
{
	Rect2& scissor = ZeroGS::vb[1].scissor;

	Rect2 newscissor;

	newscissor.x0 = ((data[0]	  ) & 0x7ff) << 3;
	newscissor.x1 = ((data[0] >> 16) & 0x7ff) << 3;
	newscissor.y0 = ((data[1]	  ) & 0x7ff) << 3;
	newscissor.y1 = ((data[1] >> 16) & 0x7ff) << 3;

	if( newscissor.x1 != scissor.x1 || newscissor.y1 != scissor.y1 ||
		newscissor.x0 != scissor.x0 || newscissor.y0 != scissor.y0 ) {

		ZeroGS::Flush(1);
		scissor = newscissor;

		// flush everything
		ZeroGS::vb[1].bNeedFrameCheck = 1;
	}
}

void __fastcall GIFRegHandlerALPHA_1(u32* data)
{
	alphaInfo newalpha;
	newalpha.abcd = *(u8*)data;
	newalpha.fix = *(u8*)(data+1);

	if( *(u16*)&newalpha != *(u16*)&ZeroGS::vb[0].alpha ) {
		ZeroGS::Flush(0);

		if( newalpha.a == 3 ) newalpha.a = 0;
		if( newalpha.b == 3 ) newalpha.b = 0;
		if( newalpha.c == 3 ) newalpha.c = 0;
		if( newalpha.d == 3 ) newalpha.d = 0;

		*(u16*)&ZeroGS::vb[0].alpha = *(u16*)&newalpha;
	}
}

void __fastcall GIFRegHandlerALPHA_2(u32* data)
{
	alphaInfo newalpha;
	newalpha.abcd = *(u8*)data;
	newalpha.fix = *(u8*)(data+1);

	if( *(u16*)&newalpha != *(u16*)&ZeroGS::vb[1].alpha ) {
		ZeroGS::Flush(1);

		if( newalpha.a == 3 ) newalpha.a = 0;
		if( newalpha.b == 3 ) newalpha.b = 0;
		if( newalpha.c == 3 ) newalpha.c = 0;
		if( newalpha.d == 3 ) newalpha.d = 0;

		*(u16*)&ZeroGS::vb[1].alpha = *(u16*)&newalpha;
	}
}

void __fastcall GIFRegHandlerDIMX(u32* data)
{
}

void __fastcall GIFRegHandlerDTHE(u32* data)
{
	gs.dthe = data[0] & 0x1;
}

void __fastcall GIFRegHandlerCOLCLAMP(u32* data)
{
	gs.colclamp = data[0] & 0x1;
}

void __fastcall GIFRegHandlerTEST_1(u32* data)
{
	testWrite(0, data);
}

void __fastcall GIFRegHandlerTEST_2(u32* data)
{
	testWrite(1, data);
}

void __fastcall GIFRegHandlerPABE(u32* data)
{
	//ZeroGS::SetAlphaChanged(0, GPUREG_PABE);
	//ZeroGS::SetAlphaChanged(1, GPUREG_PABE);
	ZeroGS::Flush(0);
	ZeroGS::Flush(1);

	gs.pabe = *data & 0x1;
}

void __fastcall GIFRegHandlerFBA_1(u32* data)
{
	ZeroGS::Flush(0);
	ZeroGS::Flush(1);
	ZeroGS::vb[0].fba.fba = *data & 0x1;
}

void __fastcall GIFRegHandlerFBA_2(u32* data)
{
	ZeroGS::Flush(0);
	ZeroGS::Flush(1);
	ZeroGS::vb[1].fba.fba = *data & 0x1;
}

void __fastcall GIFRegHandlerFRAME_1(u32* data)
{
	frameWrite(0, data);
}

void __fastcall GIFRegHandlerFRAME_2(u32* data)
{
	frameWrite(1, data);
}

void __fastcall GIFRegHandlerZBUF_1(u32* data)
{
	zbufInfo& zbuf = ZeroGS::vb[0].zbuf;

	int psm = (0x30|((data[0] >> 24) & 0xf));
	if( zbuf.zbp == (data[0] & 0x1ff) * 32 &&
		zbuf.psm == psm &&
		zbuf.zmsk == (data[1] & 0x1) ) {
		return;
	}

	// error detection
	if( m_Blocks[psm].bpp == 0 )
		return;

	ZeroGS::Flush(0);
	ZeroGS::Flush(1);

	zbuf.zbp = (data[0] & 0x1ff) * 32;
	zbuf.psm = 0x30|((data[0] >> 24) & 0xf);
	zbuf.zmsk = data[1] & 0x1;

	ZeroGS::vb[0].zprimmask = 0xffffffff;
	if( zbuf.psm > 0x31 ) ZeroGS::vb[0].zprimmask = 0xffff;

	ZeroGS::vb[0].bNeedZCheck = 1;
}

void __fastcall GIFRegHandlerZBUF_2(u32* data)
{
	zbufInfo& zbuf = ZeroGS::vb[1].zbuf;

	int psm = (0x30|((data[0] >> 24) & 0xf));
	if( zbuf.zbp == (data[0] & 0x1ff) * 32 &&
		zbuf.psm == psm &&
		zbuf.zmsk == (data[1] & 0x1) ) {
		return;
	}

	// error detection
	if( m_Blocks[psm].bpp == 0 )
		return;

	ZeroGS::Flush(0);
	ZeroGS::Flush(1);

	zbuf.zbp = (data[0] & 0x1ff) * 32;
	zbuf.psm = 0x30|((data[0] >> 24) & 0xf);
	zbuf.zmsk = data[1] & 0x1;

	ZeroGS::vb[1].bNeedZCheck = 1;

	ZeroGS::vb[1].zprimmask = 0xffffffff;
	if( zbuf.psm > 0x31 ) ZeroGS::vb[1].zprimmask = 0xffff;
}

void __fastcall GIFRegHandlerBITBLTBUF(u32* data)
{
	gs.srcbufnew.bp  = ((data[0]	  ) & 0x3fff);// * 64;
	gs.srcbufnew.bw  = ((data[0] >> 16) & 0x3f) * 64;
	gs.srcbufnew.psm =  (data[0] >> 24) & 0x3f;
	gs.dstbufnew.bp  = ((data[1]	  ) & 0x3fff);// * 64;
	gs.dstbufnew.bw  = ((data[1] >> 16) & 0x3f) * 64;
	gs.dstbufnew.psm =  (data[1] >> 24) & 0x3f;

	if (gs.dstbufnew.bw == 0) gs.dstbufnew.bw = 64;
}

void __fastcall GIFRegHandlerTRXPOS(u32* data)
{
	gs.trxposnew.sx  = (data[0]	  ) & 0x7ff;
	gs.trxposnew.sy  = (data[0] >> 16) & 0x7ff;
	gs.trxposnew.dx  = (data[1]	  ) & 0x7ff;
	gs.trxposnew.dy  = (data[1] >> 16) & 0x7ff;
	gs.trxposnew.dir = (data[1] >> 27) & 0x3;
}

void __fastcall GIFRegHandlerTRXREG(u32* data)
{
	gs.imageWtemp = data[0]&0xfff;
	gs.imageHtemp = data[1]&0xfff;
}

void __fastcall GIFRegHandlerTRXDIR(u32* data)
{
	// terminate any previous transfers
	switch( gs.imageTransfer ) {
		case 0: // host->loc
			gs.imageTransfer = -1;
			break;
		case 1: // loc->host
			ZeroGS::TerminateLocalHost();
			break;
	}

	gs.srcbuf = gs.srcbufnew;
	gs.dstbuf = gs.dstbufnew;
	gs.trxpos = gs.trxposnew;
	gs.imageTransfer = data[0] & 0x3;
	gs.imageWnew = gs.imageWtemp;
	gs.imageHnew = gs.imageHtemp;

	if( gs.imageWnew > 0 && gs.imageHnew > 0 ) {
		switch(gs.imageTransfer) {
			case 0: // host->loc
				ZeroGS::InitTransferHostLocal();
				break;

			case 1: // loc->host

				ZeroGS::InitTransferLocalHost();
				break;
			case 2:

				ZeroGS::TransferLocalLocal();
				break;

			case 3:
				gs.imageTransfer = -1;
				break;

			default: assert(0);
		}
	}
	else {
#ifdef ZEROGS_DEVBUILD
		WARN_LOG("ZeroGS: dummy transfer\n");
#endif
		gs.imageTransfer = -1;
	}
}

static u32 oldhw[4];
void __fastcall GIFRegHandlerHWREG(u32* data)
{
	if( gs.imageTransfer == 0 ) {
		ZeroGS::TransferHostLocal(data, 2);
	}
	else {
#ifdef ZEROGS_DEVBUILD
		ERROR_LOG("ZeroGS: HWREG!? %8.8x_%8.8x\n", data[0], data[1]);
		//assert(0);
#endif
	}
}

extern int g_GSMultiThreaded;

void __fastcall GIFRegHandlerSIGNAL(u32* data)
{
	if(!g_GSMultiThreaded) {
		SIGLBLID->SIGID = (SIGLBLID->SIGID&~data[1])|(data[0]&data[1]);

//	  if (gs.CSRw & 0x1) CSR->SIGNAL = 1;
//	  if (!IMR->SIGMSK && GSirq)
//		  GSirq();

		if (gs.CSRw & 0x1) {
			CSR->SIGNAL = 1;
			//gs.CSRw &= ~1;
		}
		if (!IMR->SIGMSK && GSirq)
			GSirq();
	}
}

void __fastcall GIFRegHandlerFINISH(u32* data)
{
	if(!g_GSMultiThreaded) {

		if (gs.CSRw & 0x2)
			CSR->FINISH = 1;
		if (!IMR->FINISHMSK && GSirq)
			GSirq();

//	  if( gs.CSRw & 2 ) {
//		  //gs.CSRw &= ~2;
//		  //CSR->FINISH = 0;
//
//
//	  }
//	  CSR->FINISH = 1;
//
//	  if( !IMR->FINISHMSK && GSirq )
//		  GSirq();
	}
}

void __fastcall GIFRegHandlerLABEL(u32* data)
{
	if(!g_GSMultiThreaded) {
		SIGLBLID->LBLID = (SIGLBLID->LBLID&~data[1])|(data[0]&data[1]);
	}
}
