/*  PCSX2 - PS2 Emulator for PCs
 *  Copyright (C) 2002-2010  PCSX2 Dev Team
 *
 *  PCSX2 is free software: you can redistribute it and/or modify it under the terms
 *  of the GNU Lesser General Public License as published by the Free Software Found-
 *  ation, either version 3 of the License, or (at your option) any later version.
 *
 *  PCSX2 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 PCSX2.
 *  If not, see <http://www.gnu.org/licenses/>.
 */

#pragma once
#include "Vif.h"

enum VURegFlags
{
    REG_STATUS_FLAG	= 16,
    REG_MAC_FLAG	= 17,
    REG_CLIP_FLAG	= 18,
    REG_ACC_FLAG	= 19, // dummy flag that indicates that VFACC is written/read (nothing to do with VI[19])
    REG_R			= 20,
    REG_I			= 21,
    REG_Q			= 22,
    REG_P           = 23, // only exists in micromode
    REG_VF0_FLAG	= 24, // dummy flag that indicates VF0 is read (nothing to do with VI[24])
    REG_TPC			= 26,
    REG_CMSAR0		= 27,
    REG_FBRST		= 28,
    REG_VPU_STAT	= 29,
    REG_CMSAR1		= 31
};

//interpreter hacks, WIP
//#define INT_VUSTALLHACK //some games work without those, big speedup
//#define INT_VUDOUBLEHACK

enum VUStatus {
	VU_Ready = 0,
	VU_Run   = 1,
	VU_Stop  = 2,
};

union VECTOR {
	struct {
		float x,y,z,w;
	} f;
	struct {
		u32 x,y,z,w;
	} i;

	float F[4];

	u128 UQ;
	s128 SQ;
	u64 UD[2];      //128 bits
	s64 SD[2];
	u32 UL[4];
	s32 SL[4];
	u16 US[8];
	s16 SS[8];
	u8  UC[16];
	s8  SC[16];
};

struct REG_VI {
	union {
		float F;
		s32   SL;
		u32	  UL;
		s16   SS[2];
		u16   US[2];
		s8    SC[4];
		u8    UC[4];
	};
	u32 padding[3]; // needs padding to make them 128bit; VU0 maps VU1's VI regs as 128bits to addr 0x4xx0 in
					// VU0 mem, with only lower 16 bits valid, and the upper 112bits are hardwired to 0 (cottonvibes)
};

//#define VUFLAG_BREAKONMFLAG		0x00000001
#define VUFLAG_MFLAGSET			0x00000002
#define VUFLAG_INTCINTERRUPT    0x00000004
struct fdivPipe {
	int enable;
	REG_VI reg;
	u32 sCycle;
	u32 Cycle;
	u32 statusflag;
};

struct efuPipe {
	int enable;
	REG_VI reg;
	u32 sCycle;
	u32 Cycle;
};

struct fmacPipe {
	int enable;
	int reg;
	int xyzw;
	u32 sCycle;
	u32 Cycle;
	u32 macflag;
	u32 statusflag;
	u32 clipflag;
};

struct ialuPipe {
	int enable;
	int reg;
	u32 sCycle;
	u32 Cycle;
};

struct __aligned16 VURegs {
	VECTOR	VF[32]; // VF and VI need to be first in this struct for proper mapping
	REG_VI	VI[32]; // needs to be 128bit x 32 (cottonvibes)

	VECTOR ACC;
	REG_VI q;
	REG_VI p;

	uint idx;		// VU index (0 or 1)

	// flags/cycle are needed by VIF dma code, so they have to be here (for now)
	// We may replace these by accessors in the future, if merited.
	u32 cycle;
	u32 flags;

	// Current opcode being interpreted or recompiled (this var is used by Interps and superVU
	// but not microVU.  Would like to have it local to their respective classes... someday)
	u32 code;

	// branch/branchpc are used by interpreter only, but making them local to the interpreter
	// classes requires considerable code refactoring.  Maybe later. >_<
	u32 branch;
	u32 branchpc;
	u32 delaybranchpc;
	bool takedelaybranch;

	// MAC/Status flags -- these are used by interpreters and superVU, but are kind of hacky
	// and shouldn't be relied on for any useful/valid info.  Would like to move them out of
	// this struct eventually.
	u32 macflag;
	u32 statusflag;
	u32 clipflag;

	u8 *Mem;
	u8 *Micro;

	u32 ebit;

	u8 VIBackupCycles;
	u32 VIOldValue;
	u32 VIRegNumber;

	fmacPipe fmac[8];
	fdivPipe fdiv;
	efuPipe efu;
	ialuPipe ialu[8];

	VURegs()
	{
		Mem = NULL;
		Micro = NULL;
	}

	bool IsVU1() const;
	bool IsVU0() const;

	VIFregisters& GetVifRegs() const
	{
		return IsVU1() ? vif1Regs : vif0Regs;
	}
};

enum VUPipeState
{
    VUPIPE_NONE = 0,
    VUPIPE_FMAC,
    VUPIPE_FDIV,
    VUPIPE_EFU,
    VUPIPE_IALU,
    VUPIPE_BRANCH,
    VUPIPE_XGKICK
};

extern __aligned16 VURegs vuRegs[2];

// Obsolete(?)  -- I think I'd rather use vu0Regs/vu1Regs or actually have these explicit to any
// CPP file that needs them only. --air
static VURegs& VU0 = vuRegs[0];
static VURegs& VU1 = vuRegs[1];

// Do not use __fi here because it fires 'multiple definition' error in GCC
inline bool VURegs::IsVU1() const  { return this == &vuRegs[1]; }
inline bool VURegs::IsVU0() const  { return this == &vuRegs[0]; }

extern u32* GET_VU_MEM(VURegs* VU, u32 addr);

