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/***************************************************************************

    h8.h

    H8-300 base cpu emulation

****************************************************************************

    Copyright Olivier Galibert
    All rights reserved.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are
    met:

        * Redistributions of source code must retain the above copyright
          notice, this list of conditions and the following disclaimer.
        * Redistributions in binary form must reproduce the above copyright
          notice, this list of conditions and the following disclaimer in
          the documentation and/or other materials provided with the
          distribution.
        * Neither the name 'MAME' nor the names of its contributors may be
          used to endorse or promote products derived from this software
          without specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY OLIVIER GALIBERT ''AS IS'' AND ANY EXPRESS OR
    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
    DISCLAIMED. IN NO EVENT SHALL OLIVIER GALIBERT BE LIABLE FOR ANY DIRECT,
    INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
    SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
    STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
    IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    POSSIBILITY OF SUCH DAMAGE.

***************************************************************************/

#ifndef __H8_H__
#define __H8_H__

class h8_device : public cpu_device {
public:
	enum {
		// digital I/O ports
		// ports 4-B are valid on 16-bit H8/3xx, ports 1-9 on 8-bit H8/3xx
		// H8S/2394 has 12 ports named 1-6 and A-G
		PORT_1,  // 0
		PORT_2,  // 1
		PORT_3,  // 2
		PORT_4,  // 3
		PORT_5,  // 4
		PORT_6,  // 5
		PORT_7,  // 6
		PORT_8,  // 7
		PORT_9,  // 8
		PORT_A,  // 9
		PORT_B,  // A
		PORT_C,  // B
		PORT_D,  // C
		PORT_E,  // D
		PORT_F,  // E
		PORT_G,  // F

		// analog inputs
		ADC_0,
		ADC_1,
		ADC_2,
		ADC_3,
		ADC_4,
		ADC_5,
		ADC_6,
		ADC_7,
	};

	h8_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source, bool mode_a16, address_map_delegate map_delegate);

	UINT64 get_cycle();
	void internal_update();

	void set_irq(int irq_vector, int irq_level, bool irq_nmi);

protected:
	struct disasm_entry {
		int slot;
		UINT32 val, mask;
		UINT16 val0, mask0;
		const char *opcode;
		int am1, am2;
		offs_t flags;
	};

	enum {
		STATE_RESET = 0x10000,
		STATE_IRQ   = 0x10001,
		STATE_TRACE = 0x10002,
	};

	enum {
		F_I  = 0x80,
		F_UI = 0x40,
		F_H  = 0x20,
		F_U  = 0x10,
		F_N  = 0x08,
		F_Z  = 0x04,
		F_V  = 0x02,
		F_C  = 0x01,

		EXR_T  = 0x80,
		EXR_NC = 0x78,
		EXR_I  = 0x07,
	};

	enum {
		DASM_none,     /* no additional arguments */

		DASM_r8l,      /* 8-bits register in bits 0-3 */
		DASM_r8h,      /* 8-bits register in bits 4-7 */
		DASM_r8u,      /* 8-bits register in bits 8-15 */
		DASM_r16l,     /* 16-bits register in bits 0-3 */
		DASM_r16h,     /* 16-bits register in bits 4-7 */
		DASM_r32l,     /* 32-bits register in bits 0-3 */
		DASM_r32h,     /* 32-bits register in bits 4-7 */

		DASM_r16ih,    /* indexed through 16-bits register in bits 4-6 */
		DASM_r16ihh,   /* indexed through 16-bits register in bits 4-6 in 4-bytes instruction */
		DASM_pr16h,    /* indexed through predecremented 16-bits register in bits 4-6 */
		DASM_r16ph,    /* indexed through postincremented 16-bits register in bits 4-6 */
		DASM_r16d16h,  /* indexed through 16-bits register in bits 4-6 with 16-bits displacement at end of instruction */

		DASM_r32ih,    /* indexed through 32-bits register in bits 4-6 */
		DASM_r32ihh,   /* indexed through 32-bits register in bits 4-6 in 4-bytes instruction */
		DASM_pr32h,    /* indexed through predecremented 32-bits register in bits 4-6 */
		DASM_r32pl,    /* indexed through postincremented 32-bits register in bits 0-2 */
		DASM_r32ph,    /* indexed through postincremented 32-bits register in bits 4-6 */
		DASM_r32d16h,  /* indexed through 32-bits register in bits 4-6 with 16-bits displacement at end of instruction */
		DASM_r32d32hh, /* indexed through 32-bits register in bits 20-22 with 32-bits displacement at end of instruction */

		DASM_psp,      /* indexed through predecremented stack pointer */
		DASM_spp,      /* indexed through postincremented stack pointer */

		DASM_r32n2l,   /* Block of 2 registers */
		DASM_r32n3l,   /* Block of 3 registers */
		DASM_r32n4l,   /* Block of 4 registers */

		DASM_abs8,     /* 8-bit address present at +1 */
		DASM_abs16,    /* 16-bit address present at end of instruction */
		DASM_abs32,    /* 32-bit address present at end of instruction */
		DASM_abs8i,    /* 8-bit indirect jump address present at +1 */
		DASM_abs16e,   /* 16-bit jump address present at +2 */
		DASM_abs24e,   /* 24-bit jump address present at +1 */

		DASM_rel8,     /* 8-bit pc-relative jump address at +1, offset=2 */
		DASM_rel16,    /* 16-bit pc-relative jump address at +2, offset=4 */

		DASM_one,      /* immediate value 1 */
		DASM_two,      /* immediate value 2 */
		DASM_four,     /* immediate value 4 */

		DASM_imm2,     /* 2-bit immediate in bits 4-5 (trapa) */
		DASM_imm3,     /* 3-bit immediate in bits 4-6 (bit selection */
		DASM_imm8,     /* 8-bit immediate at +1 */
		DASM_imm16,    /* 16-bit immediate at +2 */
		DASM_imm32,    /* 32-bit immediate at +2 */

		DASM_ccr,      /* internal register ccr */
		DASM_exr,      /* internal register exr */
		DASM_macl,     /* internal register macl */
		DASM_mach,     /* internal register mach */
	};

	// device-level overrides
	virtual void device_start();
	virtual void device_reset();

	// device_execute_interface overrides
	virtual UINT32 execute_min_cycles() const;
	virtual UINT32 execute_max_cycles() const;
	virtual UINT32 execute_input_lines() const;
	virtual void execute_run();

	// device_memory_interface overrides
	virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const;

	// device_state_interface overrides
	virtual void state_import(const device_state_entry &entry);
	virtual void state_export(const device_state_entry &entry);
	virtual void state_string_export(const device_state_entry &entry, astring &string);

	// device_disasm_interface overrides
	virtual UINT32 disasm_min_opcode_bytes() const;
	virtual UINT32 disasm_max_opcode_bytes() const;
	virtual offs_t disasm_disassemble(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram, UINT32 options);

	address_space_config program_config, io_config;
	address_space *program, *io;
	direct_read_data *direct;

	UINT32  PPC;                    /* previous program counter */
	UINT32  NPC;                    /* next start-of-instruction program counter */
	UINT32  PC;                     /* program counter */
	UINT16  PIR;                    /* Prefetched word */
	UINT16  IR[5];                  /* Fetched instruction */
	UINT16  R[16];                  /* Rn (0-7), En (8-15, h8-300h+) */
	UINT8   EXR;                    /* Interrupt/trace register (h8s/2000+) */
	UINT8   CCR;                    /* Condition-code register */
	INT64   MAC;                    /* Multiply accumulator (h8s/2600+) */
	UINT8   MACF;                   /* MAC flags (h8s/2600+) */
	UINT32  TMP1, TMP2;
	UINT32  TMPR;                   /* For debugger ER register import */

	bool has_exr, has_trace, supports_advanced, mode_advanced, mac_saturating;

	int inst_state, inst_substate;
	int icount, bcount;
	UINT64 start_cycles, end_cycles;
	int irq_vector, taken_irq_vector;
	int irq_level, taken_irq_level;
	bool irq_required, irq_nmi;

	static const disasm_entry disasm_entries[];

	offs_t disassemble_generic(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram, UINT32 options, const disasm_entry *table);
	void disassemble_am(char *&buffer, int am, offs_t pc, const UINT8 *oprom, UINT32 opcode, int offset);

	virtual void do_exec_full();
	virtual void do_exec_partial();
	static void add_event(UINT64 &event_time, UINT64 new_event);
	virtual bool exr_in_stack() const;
	virtual void update_irq_filter() = 0;
	virtual void interrupt_taken() = 0;
	virtual void internal_update(UINT64 current_time) = 0;
	void recompute_bcount(UINT64 event_time);
	virtual int trace_setup();
	virtual int trapa_setup();
	virtual void irq_setup() = 0;

	UINT16 read16i(UINT32 adr);
	UINT16 fetch();
	inline void fetch(int slot) { IR[slot] = fetch(); }
	UINT8 read8(UINT32 adr);
	void write8(UINT32 adr, UINT8 data);
	UINT16 read16(UINT32 adr);
	void write16(UINT32 adr, UINT16 data);
	void internal(int cycles);
	inline void prefetch() { prefetch_start(); prefetch_done(); }
	inline void prefetch_noirq() { prefetch_start(); prefetch_done_noirq(); }
	inline void prefetch_noirq_notrace() { prefetch_start(); prefetch_done_noirq_notrace(); }
	void prefetch_start() { NPC = PC; PIR = fetch(); }
	void prefetch_switch(UINT32 pc, UINT16 ir) { NPC = pc; PC = pc+2; PIR = ir; }
	void prefetch_done();
	void prefetch_done_noirq();
	void prefetch_done_noirq_notrace();
	void illegal();

	UINT8 do_addx8(UINT8 a, UINT8 b);
	UINT8 do_subx8(UINT8 a, UINT8 b);

	UINT8 do_inc8(UINT8 a, UINT8 b);
	UINT16 do_inc16(UINT16 a, UINT16 b);
	UINT32 do_inc32(UINT32 a, UINT32 b);

	UINT8 do_add8(UINT8 a, UINT8 b);
	UINT16 do_add16(UINT16 a, UINT16 b);
	UINT32 do_add32(UINT32 a, UINT32 b);

	UINT8 do_dec8(UINT8 a, UINT8 b);
	UINT16 do_dec16(UINT16 a, UINT16 b);
	UINT32 do_dec32(UINT32 a, UINT32 b);

	UINT8 do_sub8(UINT8 a, UINT8 b);
	UINT16 do_sub16(UINT16 a, UINT16 b);
	UINT32 do_sub32(UINT32 a, UINT32 b);

	UINT8 do_shal8(UINT8 v);
	UINT16 do_shal16(UINT16 v);
	UINT32 do_shal32(UINT32 v);

	UINT8 do_shar8(UINT8 v);
	UINT16 do_shar16(UINT16 v);
	UINT32 do_shar32(UINT32 v);

	UINT8 do_shll8(UINT8 v);
	UINT16 do_shll16(UINT16 v);
	UINT32 do_shll32(UINT32 v);

	UINT8 do_shlr8(UINT8 v);
	UINT16 do_shlr16(UINT16 v);
	UINT32 do_shlr32(UINT32 v);

	UINT8 do_rotl8(UINT8 v);
	UINT16 do_rotl16(UINT16 v);
	UINT32 do_rotl32(UINT32 v);

	UINT8 do_rotr8(UINT8 v);
	UINT16 do_rotr16(UINT16 v);
	UINT32 do_rotr32(UINT32 v);

	UINT8 do_rotxl8(UINT8 v);
	UINT16 do_rotxl16(UINT16 v);
	UINT32 do_rotxl32(UINT32 v);

	UINT8 do_rotxr8(UINT8 v);
	UINT16 do_rotxr16(UINT16 v);
	UINT32 do_rotxr32(UINT32 v);

	UINT8 do_shal2_8(UINT8 v);
	UINT16 do_shal2_16(UINT16 v);
	UINT32 do_shal2_32(UINT32 v);

	UINT8 do_shar2_8(UINT8 v);
	UINT16 do_shar2_16(UINT16 v);
	UINT32 do_shar2_32(UINT32 v);

	UINT8 do_shll2_8(UINT8 v);
	UINT16 do_shll2_16(UINT16 v);
	UINT32 do_shll2_32(UINT32 v);

	UINT8 do_shlr2_8(UINT8 v);
	UINT16 do_shlr2_16(UINT16 v);
	UINT32 do_shlr2_32(UINT32 v);

	UINT8 do_rotl2_8(UINT8 v);
	UINT16 do_rotl2_16(UINT16 v);
	UINT32 do_rotl2_32(UINT32 v);

	UINT8 do_rotr2_8(UINT8 v);
	UINT16 do_rotr2_16(UINT16 v);
	UINT32 do_rotr2_32(UINT32 v);

	UINT8 do_rotxl2_8(UINT8 v);
	UINT16 do_rotxl2_16(UINT16 v);
	UINT32 do_rotxl2_32(UINT32 v);

	UINT8 do_rotxr2_8(UINT8 v);
	UINT16 do_rotxr2_16(UINT16 v);
	UINT32 do_rotxr2_32(UINT32 v);

	void set_nzv8(UINT8 v);
	void set_nzv16(UINT16 v);
	void set_nzv32(UINT32 v);

	void set_nz16(UINT16 v);
	void set_nz32(UINT32 v);

	inline void r8_w(int reg, UINT8 val) {
		if(reg & 8)
			R[reg & 7] = (R[reg & 7] & 0xff00) | val;
		else
			R[reg & 7] = (R[reg & 7] & 0xff) | (val << 8);
	}

	inline UINT8 r8_r(int reg) {
		if(reg & 8)
			return R[reg & 7];
		else
			return R[reg & 7] >> 8;
	}

	// Note that the decode is so that there's no risk of a h8-300
	// hitting the E registers even with the 0xf mask - the
	// instruction would not be called in the first place
	//
	// Well, except for the instructions where the h8-300 mode is r16
	// and the h8-300h is r32 of course, we have to be careful to mask
	// in h8.lst there if the top bit is 1.

	inline void r16_w(int reg, UINT16 val) { R[reg & 0xf] = val; }
	inline UINT16 r16_r(int reg) { return R[reg & 0xf]; }

#define O(o) void o ## _full(); void o ## _partial()
	O(add_b_imm8_r8u); O(add_b_r8h_r8l); O(add_w_imm16_r16l); O(add_w_r16h_r16l);
	O(adds_l_one_r16l); O(adds_l_two_r16l); O(adds_l_four_r16l);
	O(addx_b_imm8_r8u); O(addx_b_r8h_r8l);
	O(and_b_imm8_r8u); O(and_w_imm16_r16l); O(and_b_r8h_r8l);
	O(andc_imm8_ccr);
	O(band_imm3_abs16); O(band_imm3_abs8); O(band_imm3_r8l); O(band_imm3_r16ihh);
	O(bcc_rel8);
	O(bclr_imm3_abs16); O(bclr_imm3_abs8); O(bclr_imm3_r8l); O(bclr_imm3_r16ihh); O(bclr_r8h_abs16); O(bclr_r8h_abs8); O(bclr_r8h_r8l); O(bclr_r8h_r16ihh);
	O(bcs_rel8);
	O(beq_rel8);
	O(bf_rel8);
	O(bge_rel8);
	O(bgt_rel8);
	O(bhi_rel8);
	O(biand_imm3_abs16); O(biand_imm3_abs8); O(biand_imm3_r8l); O(biand_imm3_r16ihh);
	O(bild_imm3_abs16); O(bild_imm3_abs8); O(bild_imm3_r8l); O(bild_imm3_r16ihh);
	O(bior_imm3_abs16); O(bior_imm3_abs8); O(bior_imm3_r8l); O(bior_imm3_r16ihh);
	O(bist_imm3_abs16); O(bist_imm3_abs8); O(bist_imm3_r8l); O(bist_imm3_r16ihh);
	O(bixor_imm3_abs16); O(bixor_imm3_abs8); O(bixor_imm3_r8l); O(bixor_imm3_r16ihh);
	O(bld_imm3_abs16); O(bld_imm3_abs8); O(bld_imm3_r8l); O(bld_imm3_r16ihh);
	O(ble_rel8);
	O(bls_rel8);
	O(blt_rel8);
	O(bmi_rel8);
	O(bne_rel8);
	O(bnot_imm3_abs16); O(bnot_imm3_abs8); O(bnot_imm3_r8l); O(bnot_imm3_r16ihh);
	O(bnot_r8h_abs16); O(bnot_r8h_abs8); O(bnot_r8h_r8l); O(bnot_r8h_r16ihh);
	O(bor_imm3_abs16); O(bor_imm3_abs8); O(bor_imm3_r8l); O(bor_imm3_r16ihh);
	O(bpl_rel8);
	O(bset_imm3_abs16); O(bset_imm3_abs8); O(bset_imm3_r8l); O(bset_imm3_r16ihh);
	O(bset_r8h_abs16); O(bset_r8h_abs8); O(bset_r8h_r8l); O(bset_r8h_r16ihh);
	O(bsr_rel8);
	O(bst_imm3_abs16); O(bst_imm3_abs8); O(bst_imm3_r8l); O(bst_imm3_r16ihh);
	O(bt_rel8);
	O(btst_imm3_abs16); O(btst_imm3_abs8); O(btst_imm3_r8l); O(btst_imm3_r16ihh);
	O(btst_r8h_abs16); O(btst_r8h_abs8); O(btst_r8h_r8l); O(btst_r8h_r16ihh);
	O(bvc_rel8);
	O(bvs_rel8);
	O(bxor_imm3_abs16); O(bxor_imm3_abs8); O(bxor_imm3_r8l); O(bxor_imm3_r16ihh);
	O(cmp_b_imm8_r8u); O(cmp_b_r8h_r8l); O(cmp_w_imm16_r16l); O(cmp_w_r16h_r16l);
	O(daa_b_r8l);
	O(das_b_r8l);
	O(dec_b_one_r8l); O(dec_w_one_r16l); O(dec_w_two_r16l);
	O(divxu_b_r8h_r16l);
	O(eepmov_b);
	O(inc_b_one_r8l);
	O(jmp_abs8i); O(jmp_abs16e);
	O(jsr_abs8i); O(jsr_abs16e); O(jsr_r16h);
	O(ldc_imm8_ccr); O(ldc_r8l_ccr);
	O(mov_b_abs16_r8l); O(mov_b_abs8_r8u); O(mov_b_imm8_r8u); O(mov_b_r8h_r8l); O(mov_b_r8l_abs16); O(mov_b_r8u_abs8); O(mov_b_r16ih_r8l); O(mov_b_r8l_r16ih); O(mov_b_r16d16h_r8l); O(mov_b_r8l_r16d16h); O(mov_b_r16ph_r8l); O(mov_b_r8l_pr16h);
	O(mov_w_abs16_r16l); O(mov_w_imm16_r16l); O(mov_w_r16h_r16l); O(mov_w_r16l_abs16); O(mov_w_r16ih_r16l); O(mov_w_r16l_r16ih); O(mov_w_r16ph_r16l); O(mov_w_r16l_pr16h); O(mov_w_r16l_r16d16h); O(mov_w_r16d16h_r16l);
	O(movfpe_abs16_r8l);
	O(movtpe_r8l_abs16);
	O(mulxu_b_r8h_r16l);
	O(neg_b_r8l);
	O(nop);
	O(not_b_r8l);
	O(or_b_imm8_r8u); O(or_b_r8h_r8l); O(or_w_imm16_r16l);
	O(orc_imm8_ccr);
	O(rotl_b_r8l);
	O(rotr_b_r8l);
	O(rotxl_b_r8l);
	O(rotxr_b_r8l);
	O(rte);
	O(rts);
	O(shal_b_r8l);
	O(shar_b_r8l);
	O(shll_b_r8l);
	O(shlr_b_r8l);
	O(sleep);
	O(stc_ccr_r8l); O(stc_exr_r8l);
	O(sub_b_r8h_r8l); O(sub_w_imm16_r16l); O(sub_w_r16h_r16l);
	O(subs_l_one_r16l); O(subs_l_two_r16l); O(subs_l_four_r16l);
	O(subx_b_imm8_r8u); O(subx_b_r8h_r8l);
	O(xor_b_imm8_r8u); O(xor_b_r8h_r8l); O(xor_w_imm16_r16l);
	O(xorc_imm8_ccr);

	O(dispatch_0100);
	O(dispatch_01007800);
	O(dispatch_0110);
	O(dispatch_0120);
	O(dispatch_0130);
	O(dispatch_0140);
	O(dispatch_01407800);
	O(dispatch_01407880);
	O(dispatch_0141);
	O(dispatch_01417800);
	O(dispatch_01417880);
	O(dispatch_0160);
	O(dispatch_01c0);
	O(dispatch_01d0);
	O(dispatch_01e0);
	O(dispatch_01f0);
	O(dispatch_6a10);
	O(dispatch_6a18);
	O(dispatch_6a30);
	O(dispatch_6a38);
	O(dispatch_7800);
	O(dispatch_7b5c);
	O(dispatch_7bd4);
	O(dispatch_7c00);
	O(dispatch_7d00);
	O(dispatch_7e00);
	O(dispatch_7f00);

	O(state_reset);
	O(state_irq);
#undef O
};

enum {
	H8_PC  = 1,
	H8_R0,
	H8_R1,
	H8_R2,
	H8_R3,
	H8_R4,
	H8_R5,
	H8_R6,
	H8_R7,
	H8_E0,
	H8_E1,
	H8_E2,
	H8_E3,
	H8_E4,
	H8_E5,
	H8_E6,
	H8_E7,
	H8_CCR,
	H8_EXR,
};

#endif