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// license:BSD-3-Clause
// copyright-holders:Tony La Porta, hap
/**************************************************************************\
* Texas Instruments TMS320x25 DSP Disassembler *
* *
* Copyright Tony La Porta *
* To be used with TMS320x25 DSP Emulator engine. *
* Written for the MAME project. *
* *
* Many thanks to those involved in the i8039 Disassembler *
* as the structure here was borrowed from it. *
* *
* Note : This is a word based microcontroller, with addressing *
* architecture based on the Harvard addressing scheme. *
* *
* *
* A Memory Address *
* B Opcode Address Argument (Requires next opcode read) *
* C Compare mode *
* D Immediate byte load *
* K Immediate bit load *
* W Immediate word load *
* M AR[x] register modification type (for indirect addressing) *
* N ARP register to change ARP pointer to (for indirect addressing) *
* P I/O port address number *
* R AR[R] register to use *
* S Shift ALU left *
* T Shift ALU left (Hex) / Nibble data *
* X Don't care bit *
* *
\**************************************************************************/
#ifndef MAME_CPU_TMS32025_32025DSM_H
#define MAME_CPU_TMS32025_32025DSM_H
#pragma once
class tms32025_disassembler : public util::disasm_interface
{
public:
tms32025_disassembler();
virtual ~tms32025_disassembler() = default;
virtual u32 opcode_alignment() const override;
virtual offs_t disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer ¶ms) override;
private:
struct TMS32025Opcode {
u16 mask; /* instruction mask */
u16 bits; /* constant bits */
u16 extcode; /* value that gets extension code */
const char *parse; /* how to parse bits */
const char *fmt; /* instruction format */
TMS32025Opcode(u16 m, u16 b, u16 e, const char *p, const char *f) : mask(m), bits(b), extcode(e), parse(p), fmt(f) {}
};
static const char *const arith[8];
static const char *const nextar[16];
static const char *const cmpmode[4];
static const char *const TMS32025Formats[];
std::vector<TMS32025Opcode> Op;
};
#endif
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