/* ------------------------------------------------------------------ */
/* | Copyright Unpublished, MIPS Computer Systems, Inc.  All Rights | */
/* | Reserved.  This software contains proprietary and confidential | */
/* | information of MIPS and its suppliers.  Use, disclosure or     | */
/* | reproduction is prohibited without the prior express written   | */
/* | consent of MIPS.                                               | */
/* ------------------------------------------------------------------ */
/*  inst.h 4.2 */
/*
 * inst.h -- instruction format defines
 */

/**
 ** UPDATE - 19 Sept 89 by Michael Smith
 **
 ** Removed signed type to remove obnoxious C++ warning message.
 **/

#ifdef LANGUAGE_C
#ifdef MIPSEB
union mips_instruction {
	unsigned word;
	unsigned char byte[4];
	struct {
		unsigned opcode : 6;
		unsigned target : 26;
	} j_format;
	struct {
		unsigned opcode : 6;
		unsigned rs : 5;
		unsigned rt : 5;
		unsigned simmediate : 16;
	} i_format;
	struct {
		unsigned opcode : 6;
		unsigned rs : 5;
		unsigned rt : 5;
		unsigned uimmediate : 16;
	} u_format;
	struct {
		unsigned opcode : 6;
		unsigned rs : 5;
		unsigned rt : 5;
		unsigned rd : 5;
		unsigned re : 5;
		unsigned func : 6;
	} r_format;
	struct {
		unsigned opcode : 6;
		unsigned : 1;
		unsigned fmt : 4;
		unsigned rt : 5;
		unsigned rd : 5;
		unsigned re : 5;
		unsigned func : 6;
	} f_format;
};
#endif

#ifdef MIPSEL
union mips_instruction {
	unsigned word;
	unsigned char byte[4];
	struct {
		unsigned target : 26;
		unsigned opcode : 6;
	} j_format;
	struct {
		unsigned simmediate : 16;
		unsigned rt : 5;
		unsigned rs : 5;
		unsigned opcode : 6;
	} i_format;
	struct {
		unsigned uimmediate : 16;
		unsigned rt : 5;
		unsigned rs : 5;
		unsigned opcode : 6;
	} u_format;
	struct {
		unsigned func : 6;
		unsigned re : 5;
		unsigned rd : 5;
		unsigned rt : 5;
		unsigned rs : 5;
		unsigned opcode : 6;
	} r_format;
	struct {
		unsigned func : 6;
		unsigned re : 5;
		unsigned rd : 5;
		unsigned rt : 5;
		unsigned fmt : 4;
		unsigned : 1;
		unsigned opcode : 6;
	} f_format;
};
#endif

#define	spec_op		0x00
#define	bcond_op	0x01
#define	j_op		0x02
#define	jal_op		0x03

#define	beq_op		0x04
#define	bne_op		0x05
#define	blez_op		0x06
#define	bgtz_op		0x07

#define	addi_op		0x08
#define	addiu_op	0x09
#define	slti_op		0x0A
#define	sltiu_op	0x0B

#define	andi_op		0x0C
#define	ori_op		0x0D
#define	xori_op		0x0E
#define	lui_op		0x0F

#define	lb_op		0x20
#define	lh_op		0x21
#define	lw_op		0x23
#define	lbu_op		0x24
#define	lhu_op		0x25
#define	ld_op		0x27
#define	sb_op		0x28
#define	sh_op		0x29
#define	sw_op		0x2B
#define	sd_op		0x2F
#define	lwl_op		0x22
#define	lwr_op		0x26
#define	swl_op		0x2a
#define	swr_op		0x2e

/* Co-processor sub-opcodes */
#define	bc_op		0x08
#define	mfc_op		0x00
#define cfc_op		0x02
#define	mtc_op		0x04
#define ctc_op		0x06

/* Co-processor 0 opcodes */
#define	cop0_op		0x10
#define	lwc0_op		0x30
#define	ldc0_op		0x34
#define	swc0_op		0x38
#define	sdc0_op		0x3c

/* Co-processor 0 sub-opcodes */
#define	tlbr_op		0x1
#define	tlbwi_op	0x2
#define	tlbwr_op	0x6
#define	tlbp_op		0x8
#define	rfe_op		0x10

/* Co-processor 1 opcodes */
#define	cop1_op		0x11
#define	lwc1_op		0x31
#define	ldc1_op		0x35
#define	swc1_op		0x39
#define	sdc1_op		0x3D

/* Co-processor 1 sub-opcodes */
#define	fadd_op		0x00
#define	fsub_op		0x01
#define	fmpy_op		0x02
#define	fdiv_op		0x03
#define	fsqrt_op	0x04
#define	fabs_op		0x05
#define	fmov_op		0x06
#define fneg_op		0x07
#define	fcvts_op	0x20
#define	fcvtd_op	0x21
#define	fcvte_op	0x22
#define	fcvtw_op	0x24
#define	fcmp_op		0x30
#define	s_fmt		0
#define	d_fmt		1
#define	e_fmt		2
#define	w_fmt		4

/* Other coprocessor opcodes */
#define	cop2_op		0x12
#define	lwc2_op		0x32
#define	ldc2_op		0x36
#define	swc2_op		0x3a
#define	sdc2_op		0x3e

#define	cop3_op		0x13
#define	lwc3_op		0x33
#define	ldc3_op		0x37
#define	swc3_op		0x3b
#define	sdc3_op		0x3f


/* bcond subopcodes */
#define	bltz_op		0x00
#define	bgez_op		0x01
#define	bltzal_op	0x10
#define	bgezal_op	0x11

/* special subopcodes */
#define	sll_op		0x00
#define	srl_op		0x02
#define	sra_op		0x03
#define	sllv_op		0x04
#define	srlv_op		0x06
#define	srav_op		0x07
#define	jr_op		0x08
#define	jalr_op		0x09
#define	syscall_op	0x0C
#define	break_op	0x0D
#define	vcall_op	0x0E

#define	mfhi_op		0x10
#define	mthi_op		0x11
#define	mflo_op		0x12
#define	mtlo_op		0x13
#define	mult_op		0x18
#define	multu_op	0x19
#define	div_op		0x1A
#define	divu_op		0x1B

#define	add_op		0x20
#define	addu_op		0x21
#define	and_op		0x24
#define	or_op		0x25
#define	xor_op		0x26
#define	nor_op		0x27
#define	sub_op		0x22
#define	subu_op		0x23
#define	slt_op		0x2A
#define	sltu_op		0x2B

#endif /* LANGUAGE_C */

#ifdef LANGUAGE_PASCAL

#ifdef MIPSEB
type
    mips_instruction =
      packed record
        case cardinal of
	  0: (
	    word: cardinal;
	    );
	  1: (
	    byte: packed array[0..3] of 0..255;
	    );
	  2: (
	    opcode: 0..63;
	    target: 0..67108863;
	    );
	  3: (
	    opcode3: 0..63;
	    rs: 0..31;
	    rt: 0..31;
	    simmediate: -32768..32767;
	    );
	  4: (
	    opcode4: 0..63;
	    rs4: 0..63;
	    rt4: 0..63;
	    uimmediate: 0..65535;
	    );
	  5: (
	    opcode5: 0..63;
	    rs5: 0..63;
	    rt5: 0..63;
	    rd5: 0..63;
	    re5: 0..63;
	    func: 0..63;
	    );
      end {record};
#endif

#ifdef MIPSEL
type
    mips_instruction =
      packed record
        case cardinal of
	  0: (
	    word: cardinal;
	    );
	  1: (
	    byte: packed array[0..3] of 0..255;
	    );
	  2: (
	    target: 0..67108863;
	    opcode: 0..63;
	    );
	  3: (
	    simmediate: -32768..32767;
	    rt: 0..31;
	    rs: 0..31;
	    opcode3: 0..63;
	    );
	  4: (
	    uimmediate: 0..65535;
	    rt4: 0..63;
	    rs4: 0..63;
	    opcode4: 0..63;
	    );
	  5: (
	    func: 0..63;
	    re5: 0..63;
	    rd5: 0..63;
	    rt5: 0..63;
	    rs5: 0..63;
	    opcode5: 0..63;
	    );
      end {record};
#endif

#define	spec_op		16#00
#define	bcond_op	16#01
#define	j_op		16#02
#define	jal_op		16#03

#define	beq_op		16#04
#define	bne_op		16#05
#define	blez_op		16#06
#define	bgtz_op		16#07

#define	addi_op		16#08
#define	addiu_op	16#09
#define	slti_op		16#0A
#define	sltiu_op	16#0B

#define	andi_op		16#0C
#define	ori_op		16#0D
#define	xori_op		16#0E
#define	lui_op		16#0F

#define	lb_op		16#20
#define	lh_op		16#21
#define	lw_op		16#23
#define	lbu_op		16#24
#define	lhu_op		16#25
#define	ld_op		16#27
#define	sb_op		16#28
#define	sh_op		16#29
#define	sw_op		16#2B
#define	sd_op		16#2F
#define	lwl_op		16#22
#define	lwr_op		16#26
#define	swl_op		16#2a
#define	swr_op		16#2e

/* Co-processor sub-opcodes */
#define	bc_op		16#08
#define	mfc_op		16#00
#define cfc_op		16#02
#define	mtc_op		16#04
#define ctc_op		16#06

/* Co-processor 0 opcodes */
#define	cop0_op		16#10
#define	lwc0_op		16#30
#define	ldc0_op		16#34
#define	swc0_op		16#38
#define	sdc0_op		16#3c

/* Co-processor 0 sub-opcodes */
#define	tlbr_op		16#1
#define	tlbwi_op	16#2
#define	tlbwr_op	16#6
#define	tlbp_op		16#8
#define	rfe_op		16#10

/* Co-processor 1 opcodes */
#define	cop1_op		16#11
#define	lwc1_op		16#31
#define	ldc1_op		16#35
#define	swc1_op		16#39
#define	sdc1_op		16#3D

/* Co-processor 1 sub-opcodes */
#define	fadd_op		16#00
#define	fsub_op		16#01
#define	fmpy_op		16#02
#define	fdiv_op		16#03
#define	fsqrt_op	16#04
#define	fabs_op		16#05
#define	fmov_op		16#06
#define fneg_op		16#07
#define	fcvts_op	16#20
#define	fcvtd_op	16#21
#define	fcvte_op	16#22
#define	fcvtw_op	16#24
#define	fcmp_op		16#30
#define	s_fmt		0
#define	d_fmt		1
#define	e_fmt		2
#define	w_fmt		4

/* Other coprocessor opcodes */
#define	cop2_op		16#12
#define	lwc2_op		16#32
#define	ldc2_op		16#36
#define	swc2_op		16#3a
#define	sdc2_op		16#3e

#define	cop3_op		16#13
#define	lwc3_op		16#33
#define	ldc3_op		16#37
#define	swc3_op		16#3b
#define	sdc3_op		16#3f


/* bcond subopcodes */
#define	bltz_op		16#00
#define	bgez_op		16#01
#define	bltzal_op	16#10
#define	bgezal_op	16#11

/* special subopcodes */
#define	sll_op		16#00
#define	srl_op		16#02
#define	sra_op		16#03
#define	sllv_op		16#04
#define	srlv_op		16#06
#define	srav_op		16#07
#define	jr_op		16#08
#define	jalr_op		16#09
#define	syscall_op	16#0C
#define	break_op	16#0D
#define	vcall_op	16#0E

#define	mfhi_op		16#10
#define	mthi_op		16#11
#define	mflo_op		16#12
#define	mtlo_op		16#13
#define	mult_op		16#18
#define	multu_op	16#19
#define	div_op		16#1A
#define	divu_op		16#1B

#define	add_op		16#20
#define	addu_op		16#21
#define	and_op		16#24
#define	or_op		16#25
#define	xor_op		16#26
#define	nor_op		16#27
#define	sub_op		16#22
#define	subu_op		16#23
#define	slt_op		16#2A
#define	sltu_op		16#2B

#endif /* LANGUAGE_PASCAL */