dolphin/Source/Core/DSPCore/Src/DSPTables.h

// Copyright (C) 2003 Dolphin Project.

// 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, version 2.0.

// 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 2.0 for more details.

// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/

// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/

// Additional copyrights go to Duddie (c) 2005 (duddie@walla.com)

#ifndef _DSPTABLES_H
#define _DSPTABLES_H

//nclude "Common.h"
#include "DSPEmitter.h"
#include "DSPCommon.h"

// The non-ADDR ones that end with _D are the opposite one - if the bit specify
// ACC0, then ACC_D will be ACC1.

// The values of these are very important.
// For the reg ones, the value >> 8 is the base register.
// & 0x80  means it's a "D".

enum partype_t
{
	P_NONE		= 0x0000,
	P_VAL       = 0x0001,
	P_IMM		= 0x0002,
	P_MEM		= 0x0003,
	P_STR		= 0x0004,
	P_ADDR_I	= 0x0005,
	P_ADDR_D	= 0x0006,
	P_REG		= 0x8000,
	P_REG04     = P_REG | 0x0400, // IX
	P_REG08		= P_REG | 0x0800, 
	P_REG18		= P_REG | 0x1800,
	P_REGM18	= P_REG | 0x1810, // used in multiply instructions
	P_REG19		= P_REG | 0x1900,
	P_REGM19	= P_REG | 0x1910, // used in multiply instructions
	P_REG1A		= P_REG | 0x1a80,
	P_REG1C		= P_REG | 0x1c00,
//	P_ACC		= P_REG | 0x1c10, // used for global accum (gcdsptool's value)
	P_ACCL		= P_REG | 0x1c00, // used for low part of accum
	P_ACCM		= P_REG | 0x1e00, // used for mid part of accum
	// The following are not in gcdsptool
	P_ACCM_D	= P_REG | 0x1e80,
	P_ACC		= P_REG | 0x2000, // used for full accum.
	P_ACC_D		= P_REG | 0x2080,
	P_AX		= P_REG | 0x2200,
	P_REGS_MASK	= 0x03f80, // gcdsptool's value = 0x01f80
	P_REF       = P_REG | 0x4000,
	P_PRG       = P_REF | P_REG,

	// The following seem like junk:
	//	P_REG10		= P_REG | 0x1000,
	//	P_AX_D		= P_REG | 0x2280,
};

#define OPTABLE_SIZE 0xffff + 1
#define EXT_OPTABLE_SIZE 0xff + 1

typedef void (*dspIntFunc)(const UDSPInstruction);
typedef void (DSPEmitter::*dspJitFunc)(const UDSPInstruction);

struct param2_t
{
	partype_t type;
	u8 size;
	u8 loc;
	s8 lshift;
	u16 mask;
};

typedef struct
{
	const char *name;
	u16 opcode;
	u16 opcode_mask;

	dspIntFunc intFunc;
	dspJitFunc jitFunc;

	u8 size;
	u8 param_count;
	param2_t params[8];
	bool extended;
	bool branch;
	bool uncond_branch;
	bool reads_pc;
	bool updates_sr;
} DSPOPCTemplate;

typedef DSPOPCTemplate opc_t;

// Opcodes
extern const DSPOPCTemplate opcodes[];
extern const int opcodes_size;
extern const DSPOPCTemplate opcodes_ext[];
extern const int opcodes_ext_size;
extern const DSPOPCTemplate cw;

#define WRITEBACKLOGSIZE 5

extern const DSPOPCTemplate *opTable[OPTABLE_SIZE];
extern const DSPOPCTemplate *extOpTable[EXT_OPTABLE_SIZE];
extern u16 writeBackLog[WRITEBACKLOGSIZE];
extern int writeBackLogIdx[WRITEBACKLOGSIZE];

// Predefined labels
struct pdlabel_t
{
	u16 addr;
	const char* name;
	const char* description;
};

extern const pdlabel_t regnames[];
extern const pdlabel_t pdlabels[];
extern const u32 pdlabels_size;

const char *pdname(u16 val);
const char *pdregname(int val);
const char *pdregnamelong(int val);

void InitInstructionTable();
void applyWriteBackLog();
void zeroWriteBackLog();
void zeroWriteBackLogPreserveAcc(u8 acc);

const DSPOPCTemplate *GetOpTemplate(const UDSPInstruction &inst);

inline void ExecuteInstruction(const UDSPInstruction inst)
{
	const DSPOPCTemplate *tinst = GetOpTemplate(inst);

	if (tinst->extended) {
		if ((inst >> 12) == 0x3)
			extOpTable[inst & 0x7F]->intFunc(inst);
		else
			extOpTable[inst & 0xFF]->intFunc(inst);
	}
	tinst->intFunc(inst);
	if (tinst->extended) {
		applyWriteBackLog();
	}
}

#endif // _DSPTABLES_H