dolphin/Source/Core/DSPCore/Src/DSPTables.h
2009-04-18 11:31:37 +00:00

169 lines
4.3 KiB
C

// Copyright (C) 2003-2009 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
#include "Common.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_ACC_D = P_REG | 0x1c80,
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_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 P_EXT 0x80
#define OPTABLE_SIZE 65536
union UDSPInstruction
{
u16 hex;
UDSPInstruction(u16 _hex) { hex = _hex; }
UDSPInstruction() { hex = 0; }
struct
{
signed shift : 6;
unsigned negating : 1;
unsigned arithmetic : 1;
unsigned areg : 1;
unsigned op : 7;
};
struct
{
unsigned ushift : 6;
};
// TODO: Figure out more instruction structures (add structs here)
};
typedef void (*dspInstFunc)(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;
dspInstFunc interpFunc;
dspInstFunc jitFunc;
u8 size;
u8 param_count;
param2_t params[8];
dspInstFunc prologue;
dspInstFunc epilogue;
} 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 u8 opSize[OPTABLE_SIZE];
extern const DSPOPCTemplate cw;
extern dspInstFunc opTable[];
extern dspInstFunc prologueTable[OPTABLE_SIZE];
extern dspInstFunc epilogueTable[OPTABLE_SIZE];
// 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();
inline void ExecuteInstruction(const UDSPInstruction& inst)
{
// TODO: Move the prologuetable calls into the relevant instructions themselves.
// Better not do things like this until things work correctly though.
if (prologueTable[inst.hex])
prologueTable[inst.hex](inst);
opTable[inst.hex](inst);
if (epilogueTable[inst.hex])
epilogueTable[inst.hex](inst);
}
// This one's pretty slow, try to use it only at init or seldomly.
// returns NULL if no matching instruction.
const DSPOPCTemplate *GetOpTemplate(const UDSPInstruction &inst);
#endif // _DSPTABLES_H