mc_opc.h

一个用在mips体系结构中的操作系统

/*
 * Copyright (C) 1996-1998 by the Board of Trustees
 *    of Leland Stanford Junior University.
 * 
 * This file is part of the SimOS distribution. 
 * See LICENSE file for terms of the license. 
 *
 */


	/*
	 *  mc_opc.h  -  Opcode definitions for the MXS compiler and simulator
	 *
	 *	NOTE: When the opcode numbering below is modified, the
	 *	tables and routines in mc_opc.c should be checked to see
	 *	if they need changes.
	 *
	 *	Jim Bennett
	 *	1993, 1994, 1995
	 */


	/*
	 *  INST  -  The format of all instructions for MXS
	 */

typedef struct
	{
	int	op;				/* Opcode		*/
	int	r2;
	short	r1, r3;				/* Register operands	*/
	int	imm;				/* Immediate operand	*/
	} INST;


	/*
	 *  Handy macros for checking out the type of instructions
	 *
	 *  is_branch  -  Return true if opcode is a branch (=> not a call)
	 *  is_branch_imm  -  Return true if opcode is a branch to an
	 *			immediate destination
	 */

#define is_branch_imm(op)	(((op) <= OPBC1TL) && ((op) >= OPJ))
#define is_branch(op)		(((op) <= OPJRET) && ((op) >= OPJ))
#define is_call_imm(op)		(((op) <= OPBGEZALL) && ((op) >= OPJAL))
#define is_call(op)		(((op) <= OPJALR) && ((op) >= OPJAL))
#define	is_conditional(op)	((((op) <= OPBGEZALL)&&((op) >= OPBLTZAL)) || \
				 (((op) <= OPBC1TL) && ((op) >= OPBEQ)) )
#define	is_indirect_branch(op)	((((op) <= OPJRET) && ((op) >= OPJR)) || \
				 ((op) == OPJALR) )
#define is_sys(op)		((((op) <= OPBREAK) && ((op) >= OPSYSCALL) || \
				 ((op) == OPCP0) || ((op) == OPBDOOR) || \
                                 ((op) == OPLDHACK)) || ((op) == OPSDHACK))
#define is_load(op)		((((op) <= OPLDC1) && ((op) >= OPLB)) || \
				 ((op) == OPLL))
#define is_store(op)		((((op) <= OPSDC1) && ((op) >= OPSB)) || \
				 ((op) == OPSC))
#define is_prefetch(op) ((op) == OPPREF)
#define is_ldst(op)		((((op) <= OPSDC1) && ((op) >= OPLB)) ||  \
				 ((op) == OPLL) || ((op) == OPSC) || ((op) == OPPREF))
#define is_fp_ctl(op)		((op) == CTL_FPC)
#define is_sc(op)               ((op) == OPSC)


#ifdef BRANCH_LIKELY
#define	is_likely(op)		((((op) <= OPBC1TL) && ((op) >= OPBEQL)) || \
				 (((op) <= OPBGEZALL) && ((op) >= OPBLTZALL)) )
#else
#define	is_likely(op)		(0)
#endif

	/*
	 *  Opcode mnemonics
	 *
	 *	Generally they follow the mnemonics in the Kane book
	 *	(MIPS RISC Architecture).
	 */

#define	OPILL		  0			/* Illegal opcode	*/

#define	OPJ		  1			/* is_branch/is_branch_imm */
#define	OPBEQ		  2			/* group		*/
#define	OPBNE		  3
#define	OPBLEZ		  4
#define	OPBGTZ		  5
#define	OPBLTZ		  6
#define	OPBGEZ		  7
#define	OPBC1F		  8
#define	OPBC1T		  9
#define	OPBEQL		 10
#define	OPBNEL		 11
#define	OPBLEZL		 12
#define	OPBGTZL		 13
#define	OPBLTZL		 14
#define	OPBGEZL		 15
#define	OPBC1FL		 16
#define	OPBC1TL		 17
#define	OPJR		 18
#define	OPJRET		 19			/* Like JR, but used to	*/
						/* indicate subroutine	*/
						/* return		*/
#define	OPJAL		 20			/* is_call/is_call_imm	*/
#define	OPBLTZAL	 21			/* group		*/
#define	OPBGEZAL	 22
#define	OPBLTZALL	 23
#define	OPBGEZALL	 24
#define	OPJALR		 25

#define	OPSYSCALL	 26			/* is_sys group		*/
#define	OPBREAK		 27

#define	OPLB		 28			/* is_load group	*/
#define	OPLH		 29
#define	OPLWL		 30
#define	OPLW		 31
#define	OPLBU		 32
#define	OPLHU		 33
#define	OPLWR		 34
#define	OPLWC1		 35
#define	OPLDC1		 36

#define	OPSB		 37			/* is_store group	*/
#define	OPSH		 38
#define	OPSWL		 39
#define	OPSW		 40
#define	OPSWR		 41
#define	OPSWC1		 42
#define	OPSDC1		 43

#define	OPADDI		 44			/* ALU operations	*/
#define	OPADDIU		 45
#define	OPSLTI		 46
#define	OPSLTIU		 47
#define	OPANDI		 48
#define	OPORI		 49
#define	OPXORI		 50
#define	OPHCPY		 51			/* Specialized OPCPY	*/
						/* for half a reg pair	*/
#define	OPSLL		 52
#define	OPSRL		 53
#define	OPSRA		 54
#define	OPSLLV		 55
#define	OPSRLV		 56
#define	OPSRAV		 57
#define	OPMULT		 58
#define	OPMULTU		 59
#define	OPDIV		 60
#define	OPDIVU		 61
#define	OPADD		 62
#define	OPADDU		 63
#define	OPSUB		 64
#define	OPSUBU		 65
#define	OPAND		 66
#define	OPOR		 67
#define	OPXOR		 68
#define	OPNOR		 69
#define	OPSLT		 70
#define	OPSLTU		 71
#define	OPCPY		 72

						/* Floating point operations */
#define	OPCVTSW		 73				/* CVT.S.W	*/
#define	OPCVTDW		 74				/* CVT.D.W	*/

#define	OPFADDS		 75				/* Single	*/
#define	OPFSUBS		 76				/* precision	*/
#define	OPFMULS		 77				/* floating	*/
#define	OPFDIVS		 78				/* point	*/
#define	OPFSQRTS	 79				/* operations	*/
#define	OPFABSS		 80
#define	OPFNEGS		 81
#define	OPFROUNDS	 82
#define	OPFTRUNCS	 83
#define	OPFCEILS	 84
#define	OPFFLOORS	 85
#define	OPCVTDS		 86
#define	OPCVTWS		 87
#define	OPCFS		 88				/* C.F.S	*/
#define	OPCUNS		 89				/* C.UN.S	*/
#define	OPCEQS		 90				/* etc.		*/
#define	OPCUEQS		 91
#define	OPCOLTS		 92
#define	OPCULTS		 93
#define	OPCOLES		 94
#define	OPCULES		 95
#define	OPCSFS		 96
#define	OPCNGLES	 97
#define	OPCSEQS		 98
#define	OPCNGLS		 99
#define	OPCLTS		100
#define	OPCNGES		101
#define	OPCLES		102
#define	OPCNGTS		103

#define	OPFADDD		104				/* Double	*/
#define	OPFSUBD		105				/* precision	*/
#define	OPFMULD		106				/* floating	*/
#define	OPFDIVD		107				/* point	*/
#define	OPFSQRTD	108				/* operations	*/
#define	OPFABSD		109
#define	OPFMOVD		110
#define	OPFNEGD		111
#define	OPFROUNDD	112
#define	OPFTRUNCD	113
#define	OPFCEILD	114
#define	OPFFLOORD	115
#define	OPCVTSD		116
#define	OPCVTWD		117
#define	OPCEQD		118				/* C.EQ.D	*/
#define	OPCUEQD		119
#define	OPCOLTD		120
#define	OPCULTD		121
#define	OPCOLED		122
#define	OPCULED		123
#define	OPCSEQD		124
#define	OPCNGLD		125
#define	OPCLTD		126
#define	OPCNGED		127
#define	OPCLED		128
#define	OPCNGTD		129

#define	CTL_FPC		130			/* Update of floating	*/
						/* point rounding mode	*/
#define	CTL_CFC		131			/* Read of FP control reg */
#define	CTL_DLY		132			/* Branch delay cycle	*/


#define	OPCP0		133
#define	OPBDOOR		134
#define OPLL            135
#define OPSC            136
#define OPCPYC1         137                     /* Copies to/from cop-1 */ 
#define OPHCPYC1        138
#define OPCP0_SPEC      139                     /* CP0 that can run speculatively */
#define OPPREF          140
#define OPLDHACK      141                     /* Hacked LD opcode */
#define OPSDHACK      142                     /* Hacked SD opcode */
#define	MAX_OP		143



	/*
	 *  Global tables and procedures defined in mc_opc.c
	 */

extern char *opcode_mnemonics[MAX_OP];
extern int lat_tab [MAX_OP];

extern int immediate_unconditional (INST *ip);