Subversion Repositories or1k

/* Table of opcodes for the OpenRISC 1000 ISA.

   Copyright 1990, 1991, 1992, 1993 Free Software Foundation, Inc.

   Contributed by Damjan Lampret (lampret@opencores.org).

This file is part of or1k_gen_isa, or1ksim, GDB and GAS.

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/* We treat all letters the same in encode/decode routines so

   we need to assign some characteristics to them like signess etc.*/

#ifndef OR32_H_ISA

#define OR32_H_ISA

#define NUM_UNSIGNED (0)

#define NUM_SIGNED (1)

#ifndef PARAMS

#define PARAMS(x) x

#endif

#ifndef CONST

#define CONST const

#endif

#define MAX_GPRS 32

#define PAGE_SIZE 8192

#undef __HALF_WORD_INSN__

#define OPERAND_DELIM (',')

#define OR32_IF_DELAY (1)

#define OR32_W_FLAG   (2)

#define OR32_R_FLAG   (4)

struct or32_letter {

  char letter;

  int  sign;

  /* int  reloc; relocation per letter ??*/

};

/* Main instruction specification array.  */

struct or32_opcode {

  /* Name of the instruction.  */

  char *name;

  /* A string of characters which describe the operands.

     Valid characters are:

     ,() Itself.  Characters appears in the assembly code.

     rA  Register operand.

     rB  Register operand.

     rD  Register operand (destination).

     I   An immediate operand, range -32768 to 32767.

     J   An immediate operand, range . (unused)

     K   An immediate operand, range 0 to 65535.

     L   An immediate operand, range 0 to 63.

     M   An immediate operand, range . (unused)

     N   An immediate operand, range -33554432 to 33554431.

     O   An immediate operand, range . (unused) */

  char *args;

  /* Opcode and operand encoding. */

  char *encoding;

#if defined(HAS_EXECUTION) && !SIMPLE_EXECUTION

  char *function_name;

#else /* defined HAS_EXECUTION && !SIMPLE_EXECUTION */

  void (*exec)();

#endif /* defined HAS_EXECUTION && !SIMPLE_EXECUTION */

  unsigned int flags;

};

/* This operand is the last in the list */

#define OPTYPE_LAST (0x80000000)

/* This operand marks the end of the operand sequence (for things like I(rD)) */

#define OPTYPE_OP   (0x40000000)

/* The operand specifies a register index */

#define OPTYPE_REG  (0x20000000)

/* The operand must be sign extended */

#define OPTYPE_SIG  (0x10000000)

/* Operand is a relative address, the `I' in `I(rD)' */

#define OPTYPE_DIS  (0x08000000)

/* The operand is a destination */

#define OPTYPE_DST  (0x04000000)

/* Which bit of the operand is the sign bit */

#define OPTYPE_SBIT (0x00001F00)

/* Amount to shift the instruction word right to get the operand */

#define OPTYPE_SHR  (0x0000001F)

#define OPTYPE_SBIT_SHR (8)

/* MM: Data how to decode operands.  */

extern struct insn_op_struct {

  unsigned long type;

  unsigned long data;

} **op_start;

#ifdef HAS_EXECUTION

extern void l_invalid PARAMS((void));

extern void l_sfne PARAMS((void));

extern void l_bf PARAMS((void));

extern void l_add PARAMS((void));

extern void l_addc PARAMS((void));

extern void l_sw PARAMS((void));

extern void l_sb PARAMS((void));

extern void l_sh PARAMS((void));

extern void l_lwz PARAMS((void));

extern void l_lbs PARAMS((void));

extern void l_lbz PARAMS((void));

extern void l_lhs PARAMS((void));

extern void l_lhz PARAMS((void));

extern void l_movhi PARAMS((void));

extern void l_and PARAMS((void));

extern void l_or PARAMS((void));

extern void l_xor PARAMS((void));

extern void l_sub PARAMS((void));

extern void l_mul PARAMS((void));

extern void l_div PARAMS((void));

extern void l_divu PARAMS((void));

extern void l_sll PARAMS((void));

extern void l_sra PARAMS((void));

extern void l_srl PARAMS((void));

extern void l_j PARAMS((void));

extern void l_jal PARAMS((void));

extern void l_jalr PARAMS((void));

extern void l_jr PARAMS((void));

extern void l_rfe PARAMS((void));

extern void l_nop PARAMS((void));

extern void l_bnf PARAMS((void));

extern void l_sfeq PARAMS((void));

extern void l_sfgts PARAMS((void));

extern void l_sfges PARAMS((void));

extern void l_sflts PARAMS((void));

extern void l_sfles PARAMS((void));

extern void l_sfgtu PARAMS((void));

extern void l_sfgeu PARAMS((void));

extern void l_sfltu PARAMS((void));

extern void l_sfleu PARAMS((void));

extern void l_extbs PARAMS((void));

extern void l_extbz PARAMS((void));

extern void l_exths PARAMS((void));

extern void l_exthz PARAMS((void));

extern void l_extws PARAMS((void));

extern void l_extwz PARAMS((void));

extern void l_mtspr PARAMS((void));

extern void l_mfspr PARAMS((void));

extern void l_sys PARAMS((void));

extern void l_trap PARAMS((void)); /* CZ 21/06/01 */

extern void l_macrc PARAMS((void));

extern void l_mac PARAMS((void));

extern void l_msb PARAMS((void));

extern void l_invalid PARAMS((void));

extern void l_cmov PARAMS ((void));

extern void l_ff1 PARAMS ((void));

extern void l_cust1 PARAMS ((void));

extern void l_cust2 PARAMS ((void));

extern void l_cust3 PARAMS ((void));

extern void l_cust4 PARAMS ((void));

extern void lf_add_s PARAMS ((void));

extern void lf_div_s PARAMS ((void));

extern void lf_ftoi_s PARAMS ((void));

extern void lf_itof_s PARAMS ((void));

extern void lf_madd_s PARAMS ((void));

extern void lf_mul_s PARAMS ((void));

extern void lf_rem_s PARAMS ((void));

extern void lf_sfeq_s PARAMS ((void));

extern void lf_sfge_s PARAMS ((void));

extern void lf_sfgt_s PARAMS ((void));

extern void lf_sfle_s PARAMS ((void));

extern void lf_sflt_s PARAMS ((void));

extern void lf_sfne_s PARAMS ((void));

extern void lf_sub_s PARAMS((void));

#endif

extern void l_none PARAMS((void));

extern CONST struct or32_letter or32_letters[];

extern CONST struct  or32_opcode or32_opcodes[];

extern CONST int num_opcodes;

/* Calculates instruction length in bytes.  Always 4 for OR32. */

extern int insn_len PARAMS((int insn_index));

/* Is individual insn's operand signed or unsigned? */

extern int letter_signed PARAMS((char l));

/* Number of letters in the individual lettered operand. */

extern int letter_range PARAMS((char l));

/* MM: Returns index of given instruction name.  */

extern int insn_index PARAMS((char *insn));

/* MM: Returns instruction name from index.  */

extern CONST char *insn_name PARAMS ((int index));

/* MM: Constructs new FSM, based on or32_opcodes.  */

extern void build_automata PARAMS ((void));

/* MM: Destructs FSM.  */

extern void destruct_automata PARAMS ((void));

/* MM: Decodes instruction using FSM.  Call build_automata first.  */

extern int insn_decode PARAMS((unsigned int insn));

/* Disassemble one instruction from insn to disassemble.

   Return the size of the instruction.  */

int disassemble_insn (unsigned long insn);

/* Disassemble one instruction from insn index.

   Return the size of the instruction.  */

int disassemble_index (unsigned long insn, int index);

/* FOR INTERNAL USE ONLY */

/* Automatically does zero- or sign- extension and also finds correct

   sign bit position if sign extension is correct extension. Which extension

   is proper is figured out from letter description. */

unsigned long extend_imm(unsigned long imm, char l);

/* Extracts value from opcode */

unsigned long or32_extract(char param_ch, char *enc_initial, unsigned long insn);

#endif