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/* d10v.h -- Header file for D10V opcode table

   Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2003

   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

1, 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 COPYING.  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 */