source: trunk/libs/newlib/src/include/opcode/d10v.h @ 558

/* d10v.h -- Header file for D10V opcode table
   Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2010
   Free Software Foundation, Inc.
   Written by Martin Hunt (hunt@cygnus.com), Cygnus Support

   This file is part of GDB, GAS, and the GNU binutils.

   GDB, GAS, and the GNU binutils are free software; you can redistribute
   them and/or modify them under the terms of the GNU General Public
   License as published by the Free Software Foundation; either version 3,
   or (at your option) any later version.

   GDB, GAS, and the GNU binutils are distributed in the hope that they
   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 file; see the file COPYING3.  If not, write to the Free
   Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

#ifndef D10V_H
#define D10V_H

/* Format Specifier */
#define FM00    0
#define FM01    0x40000000
#define FM10    0x80000000
#define FM11    0xC0000000

#define NOP 0x5e00
#define OPCODE_DIVS     0x14002800

/* The opcode table is an array of struct d10v_opcode.  */

struct d10v_opcode
{
  /* The opcode name.  */
  const char *name;

  /* the opcode format */
  int format;

  /* These numbers were picked so we can do if( i & SHORT_OPCODE) */
#define SHORT_OPCODE 1
#define LONG_OPCODE  8
#define SHORT_2      1          /* short with 2 operands */
#define SHORT_B      3          /* short with 8-bit branch */
#define LONG_B       8          /* long with 16-bit branch */
#define LONG_L       10         /* long with 3 operands */
#define LONG_R       12         /* reserved */

  /* just a placeholder for variable-length instructions */
  /* for example, "bra" will be a fake for "bra.s" and bra.l" */
  /* which will immediately follow in the opcode table.  */
#define OPCODE_FAKE  32

  /* the number of cycles */
  int cycles;

  /* the execution unit(s) used */
  int unit;
#define EITHER  0
#define IU      1
#define MU      2
#define BOTH    3

  /* execution type; parallel or sequential */
  /* this field is used to decide if two instructions */
  /* can be executed in parallel */
  int exec_type;
#define PARONLY 1       /* parallel only */
#define SEQ     2       /* must be sequential */
#define PAR     4       /* may be parallel */
#define BRANCH_LINK 8   /* subroutine call.  must be aligned */
#define RMEM     16     /* reads memory */
#define WMEM     32     /* writes memory */
#define RF0      64     /* reads f0 */
#define WF0     128     /* modifies f0 */
#define WCAR    256     /* write Carry */
#define BRANCH  512     /* branch, no link */
#define ALONE  1024     /* short but pack with a NOP if on asm line alone */

  /* the opcode */
  long opcode;

  /* mask.  if( (i & mask) == opcode ) then match */
  long mask;

  /* An array of operand codes.  Each code is an index into the
     operand table.  They appear in the order which the operands must
     appear in assembly code, and are terminated by a zero.  */
  unsigned char operands[6];
};

/* The table itself is sorted by major opcode number, and is otherwise
   in the order in which the disassembler should consider
   instructions.  */
extern const struct d10v_opcode d10v_opcodes[];
extern const int d10v_num_opcodes;

/* The operands table is an array of struct d10v_operand.  */
struct d10v_operand
{
  /* The number of bits in the operand.  */
  int bits;

  /* How far the operand is left shifted in the instruction.  */
  int shift;

  /* One bit syntax flags.  */
  int flags;
};

/* Elements in the table are retrieved by indexing with values from
   the operands field of the d10v_opcodes table.  */

extern const struct d10v_operand d10v_operands[];

/* Values defined for the flags field of a struct d10v_operand.  */

/* the operand must be an even number */
#define OPERAND_EVEN    (1)

/* the operand must be an odd number */
#define OPERAND_ODD     (2)     

/* this is the destination register; it will be modified */
/* this is used by the optimizer */
#define OPERAND_DEST    (4)

/* number or symbol */
#define OPERAND_NUM     (8)

/* address or label */
#define OPERAND_ADDR    (0x10)

/* register */
#define OPERAND_REG     (0x20)

/* postincrement +  */
#define OPERAND_PLUS    (0x40)

/* postdecrement -  */
#define OPERAND_MINUS   (0x80)

/* @  */
#define OPERAND_ATSIGN  (0x100)

/* @(  */
#define OPERAND_ATPAR   (0x200)

/* accumulator 0 */
#define OPERAND_ACC0    (0x400)

/* accumulator 1 */
#define OPERAND_ACC1    (0x800)

/* f0 / f1 flag register */
#define OPERAND_FFLAG   (0x1000)

/* c flag register */
#define OPERAND_CFLAG   (0x2000)

/* control register  */
#define OPERAND_CONTROL (0x4000)

/* predecrement mode '@-sp'  */
#define OPERAND_ATMINUS (0x8000)

/* signed number */
#define OPERAND_SIGNED  (0x10000)

/* special accumulator shifts need a 4-bit number */
/* 1 <= x <= 16 */
#define OPERAND_SHIFT   (0x20000)

/* general purpose register */
#define OPERAND_GPR     (0x40000)

/* special imm3 values with range restricted to -2 <= imm3 <= 3 */
/* needed for rac/rachi */
#define RESTRICTED_NUM3 (0x80000)

/* Pre-decrement is only supported for SP.  */
#define OPERAND_SP      (0x100000)

/* Post-decrement is not supported for SP.  Like OPERAND_EVEN, and
   unlike OPERAND_SP, this flag doesn't prevent the instruction from
   matching, it only fails validation later on.  */
#define OPERAND_NOSP    (0x200000)

/* Structure to hold information about predefined registers.  */
struct pd_reg
{
  char *name;           /* name to recognize */
  char *pname;          /* name to print for this register */
  int value;
};

extern const struct pd_reg d10v_predefined_registers[];
int d10v_reg_name_cnt (void);

/* an expressionS only has one register type, so we fake it */
/* by setting high bits to indicate type */
#define REGISTER_MASK   0xFF

#endif /* D10V_H */