178 lines
4.2 KiB
C
178 lines
4.2 KiB
C
// Copyright (C) 2003 Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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// Additional copyrights go to Duddie (c) 2005 (duddie@walla.com)
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#ifndef _DSPTABLES_H
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#define _DSPTABLES_H
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#include "Common.h"
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// The non-ADDR ones that end with _D are the opposite one - if the bit specify
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// ACC0, then ACC_D will be ACC1.
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// The values of these are very important.
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// For the reg ones, the value >> 8 is the base register.
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// & 0x80 means it's a "D".
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enum partype_t
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{
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P_NONE = 0x0000,
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P_VAL = 0x0001,
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P_IMM = 0x0002,
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P_MEM = 0x0003,
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P_STR = 0x0004,
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P_ADDR_I = 0x0005,
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P_ADDR_D = 0x0006,
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P_REG = 0x8000,
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P_REG04 = P_REG | 0x0400, // IX
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P_REG08 = P_REG | 0x0800,
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P_REG18 = P_REG | 0x1800,
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P_REGM18 = P_REG | 0x1810, // used in multiply instructions
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P_REG19 = P_REG | 0x1900,
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P_REGM19 = P_REG | 0x1910, // used in multiply instructions
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P_REG1A = P_REG | 0x1a80,
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P_REG1C = P_REG | 0x1c00,
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// P_ACC = P_REG | 0x1c10, // used for global accum (gcdsptool's value)
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P_ACCL = P_REG | 0x1c00, // used for low part of accum
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P_ACCM = P_REG | 0x1e00, // used for mid part of accum
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// The following are not in gcdsptool
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P_ACCM_D = P_REG | 0x1e80,
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P_ACC = P_REG | 0x2000, // used for full accum.
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P_ACC_D = P_REG | 0x2080,
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P_AX = P_REG | 0x2200,
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P_REGS_MASK = 0x03f80, // gcdsptool's value = 0x01f80
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P_REF = P_REG | 0x4000,
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P_PRG = P_REF | P_REG,
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// The following seem like junk:
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// P_REG10 = P_REG | 0x1000,
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// P_AX_D = P_REG | 0x2280,
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};
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#define P_EXT 0x80
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#define OPTABLE_SIZE 0xffff + 1
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#define EXT_OPTABLE_SIZE 0xff + 1
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union UDSPInstruction
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{
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u16 hex;
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UDSPInstruction(u16 _hex) { hex = _hex; }
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UDSPInstruction() { hex = 0; }
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struct
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{
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signed shift : 6;
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unsigned negating : 1;
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unsigned arithmetic : 1;
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unsigned areg : 1;
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unsigned op : 7;
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};
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struct
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{
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unsigned ushift : 6;
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};
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// TODO: Figure out more instruction structures (add structs here)
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};
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typedef void (*dspInstFunc)(const UDSPInstruction&);
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struct param2_t
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{
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partype_t type;
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u8 size;
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u8 loc;
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s8 lshift;
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u16 mask;
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};
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typedef struct
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{
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const char *name;
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u16 opcode;
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u16 opcode_mask;
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dspInstFunc interpFunc;
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dspInstFunc jitFunc;
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u8 size;
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u8 param_count;
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param2_t params[8];
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bool extended;
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} DSPOPCTemplate;
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typedef DSPOPCTemplate opc_t;
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// Opcodes
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extern const DSPOPCTemplate opcodes[];
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extern const int opcodes_size;
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extern const DSPOPCTemplate opcodes_ext[];
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extern const int opcodes_ext_size;
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extern u8 opSize[OPTABLE_SIZE];
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extern const DSPOPCTemplate cw;
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#define WRITEBACKLOGSIZE 7
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extern dspInstFunc opTable[];
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extern bool opTableUseExt[OPTABLE_SIZE];
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extern dspInstFunc extOpTable[EXT_OPTABLE_SIZE];
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extern u16 writeBackLog[WRITEBACKLOGSIZE];
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extern int writeBackLogIdx[WRITEBACKLOGSIZE];
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// Predefined labels
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struct pdlabel_t
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{
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u16 addr;
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const char* name;
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const char* description;
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};
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extern const pdlabel_t regnames[];
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extern const pdlabel_t pdlabels[];
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extern const u32 pdlabels_size;
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const char *pdname(u16 val);
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const char *pdregname(int val);
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const char *pdregnamelong(int val);
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void InitInstructionTable();
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void applyWriteBackLog();
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void zeroWriteBackLog();
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inline void ExecuteInstruction(const UDSPInstruction& inst)
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{
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if (opTableUseExt[inst.hex]) {
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if ((inst.hex >> 12) == 0x3)
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extOpTable[inst.hex & 0x7F](inst);
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else
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extOpTable[inst.hex & 0xFF](inst);
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}
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opTable[inst.hex](inst);
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if (opTableUseExt[inst.hex]) {
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applyWriteBackLog();
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}
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}
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// This one's pretty slow, try to use it only at init or seldomly.
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// returns NULL if no matching instruction.
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const DSPOPCTemplate *GetOpTemplate(const UDSPInstruction &inst);
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#endif // _DSPTABLES_H
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