Subversion Repositories openrisc_2011-10-31

/* d30v.h -- Header file for D30V opcode table

   Copyright 1997, 1998, 1999, 2000, 2001, 2003 Free Software Foundation, Inc.

   Written by Martin Hunt (hunt@cygnus.com), Cygnus Solutions

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 D30V_H

#define D30V_H

#define NOP 0x00F00000

/* 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 pre_defined_registers[];

int reg_name_cnt (void);

/* the number of control registers */

#define MAX_CONTROL_REG 64

/* define the format specifiers */

#define FM00    0

#define FM01    0x80000000

#define FM10    0x8000000000000000LL

#define FM11    0x8000000080000000LL

/* define the opcode classes */

#define BRA     0

#define LOGIC   1

#define IMEM    2

#define IALU1   4

#define IALU2   5

/* define the execution condition codes */

#define ECC_AL  0        /* ALways (default) */

#define ECC_TX  1       /* F0=True, F1=Don't care */

#define ECC_FX  2       /* F0=False, F1=Don't care */

#define ECC_XT  3       /* F0=Don't care, F1=True */

#define ECC_XF  4       /* F0=Don't care, F1=False */

#define ECC_TT  5       /* F0=True, F1=True */

#define ECC_TF  6       /* F0=True, F1=False */

#define ECC_RESERVED    7       /* reserved */

#define ECC_MAX ECC_RESERVED

extern const char *d30v_ecc_names[];

/* condition code table for CMP and CMPU */

extern const char *d30v_cc_names[];

/* The opcode table is an array of struct d30v_opcode.  */

struct d30v_opcode

{

  /* The opcode name.  */

  const char *name;

  /* the opcode */

  int op1;      /* first part, "IALU1" for example */

  int op2;      /* the rest of the opcode */

  /* opcode format(s).  These numbers correspond to entries */

  /* in the d30v_format_table */

  unsigned char format[4];

#define SHORT_M         1

#define SHORT_M2        5       /* for ld2w and st2w */

#define SHORT_A         9

#define SHORT_B1        11

#define SHORT_B2        12

#define SHORT_B2r     13

#define SHORT_B3      14

#define SHORT_B3r     16

#define SHORT_B3b     18

#define SHORT_B3br    20

#define SHORT_D1r     22

#define SHORT_D2      24

#define SHORT_D2r     26

#define SHORT_D2Br    28

#define SHORT_U       30      /* unary SHORT_A.  ABS for example */

#define SHORT_F       31      /* SHORT_A with flag registers */

#define SHORT_AF      33      /* SHORT_A with only the first register a flag register */

#define SHORT_T       35      /* for trap instruction */

#define SHORT_A5      36      /* SHORT_A with a 5-bit immediate instead of 6 */

#define SHORT_CMP     38      /* special form for CMPcc */

#define SHORT_CMPU    40      /* special form for CMPUcc */

#define SHORT_A1      42      /* special form of SHORT_A for MACa opcodes where a=1 */

#define SHORT_AA      44      /* SHORT_A with the first register an accumulator */

#define SHORT_RA      46      /* SHORT_A with the second register an accumulator */

#define SHORT_MODINC  48      

#define SHORT_MODDEC  49

#define SHORT_C1      50

#define SHORT_C2      51

#define SHORT_UF      52

#define SHORT_A2      53

#define SHORT_NONE    55      /* no operands */

#define SHORT_AR      56      /* like SHORT_AA but only accept register as third parameter  */

#define LONG          57

#define LONG_U        58      /* unary LONG */

#define LONG_Ur       59      /* LONG pc-relative */

#define LONG_CMP      60      /* special form for CMPcc and CMPUcc */

#define LONG_M        61      /* Memory long for ldb, stb */

#define LONG_M2       62      /* Memory long for ld2w, st2w */

#define LONG_2        63      /* LONG with 2 operands; jmptnz */

#define LONG_2r       64      /* LONG with 2 operands; bratnz */

#define LONG_2b       65      /* LONG_2 with modifier of 3 */

#define LONG_2br      66      /* LONG_2r with modifier of 3 */

#define LONG_D        67      /* for DJMPI */

#define LONG_Dr       68      /* for DBRAI */

#define LONG_Dbr      69      /* for repeati */

  /* the execution unit(s) used */

  int unit;

#define EITHER  0

#define IU      1

#define MU      2

#define EITHER_BUT_PREFER_MU 3

  /* this field is used to decide if two instructions */

  /* can be executed in parallel */

  long flags_used;

  long flags_set;

#define FLAG_0          (1L<<0)

#define FLAG_1          (1L<<1)

#define FLAG_2          (1L<<2)

#define FLAG_3          (1L<<3)

#define FLAG_4          (1L<<4)         /* S (saturation) */

#define FLAG_5          (1L<<5)         /* V (overflow) */

#define FLAG_6          (1L<<6)         /* VA (accumulated overflow) */

#define FLAG_7          (1L<<7)         /* C (carry/borrow) */

#define FLAG_SM         (1L<<8)         /* SM (stack mode) */

#define FLAG_RP         (1L<<9)         /* RP (repeat enable) */

#define FLAG_CONTROL    (1L<<10)        /* control registers */

#define FLAG_A0         (1L<<11)        /* A0 */

#define FLAG_A1         (1L<<12)        /* A1 */

#define FLAG_JMP        (1L<<13)        /* instruction is a branch */

#define FLAG_JSR        (1L<<14)        /* subroutine call.  must be aligned */

#define FLAG_MEM        (1L<<15)        /* reads/writes memory */

#define FLAG_NOT_WITH_ADDSUBppp  (1L<<16) /* Old meaning: a 2 word 4 byter operation

                                           New meaning: operation cannot be

                                           combined in parallel with ADD/SUBppp. */

#define FLAG_MUL16      (1L<<17)        /* 16 bit multiply */

#define FLAG_MUL32      (1L<<18)        /* 32 bit multiply */

#define FLAG_ADDSUBppp  (1L<<19)        /* ADDppp or SUBppp */

#define FLAG_DELAY      (1L<<20)        /* This is a delayed branch or jump */

#define FLAG_LKR        (1L<<21)        /* insn in left slot kills right slot */

#define FLAG_CVVA       (FLAG_5|FLAG_6|FLAG_7)

#define FLAG_C          FLAG_7

#define FLAG_ALL        (FLAG_0 | \

                         FLAG_1 | \

                         FLAG_2 | \

                         FLAG_3 | \

                         FLAG_4 | \

                         FLAG_5 | \

                         FLAG_6 | \

                         FLAG_7 | \

                         FLAG_SM | \

                         FLAG_RP | \

                         FLAG_CONTROL)

  int reloc_flag;

#define RELOC_PCREL     1

#define RELOC_ABS       2

};

extern const struct d30v_opcode d30v_opcode_table[];

extern const int d30v_num_opcodes;

/* The operands table is an array of struct d30v_operand.  */

struct d30v_operand

{

  /* the length of the field */

  int length;

  /* The number of significant bits in the operand.  */

  int bits;

  /* position relative to Ra */

  int position;

  /* syntax flags.  */

  long flags;

};

extern const struct d30v_operand d30v_operand_table[];

/* Values defined for the flags field of a struct d30v_operand.  */

/* this is the destination register; it will be modified */

/* this is used by the optimizer */

#define OPERAND_DEST    (1)

/* number or symbol */

#define OPERAND_NUM     (2)

/* address or label */

#define OPERAND_ADDR    (4)

/* register */

#define OPERAND_REG     (8)

/* postincrement +  */

#define OPERAND_PLUS    (0x10)

/* postdecrement -  */

#define OPERAND_MINUS   (0x20)

/* signed number */

#define OPERAND_SIGNED  (0x40)

/* this operand must be shifted left by 3 */

#define OPERAND_SHIFT   (0x80)

/* flag register */

#define OPERAND_FLAG    (0x100)

/* control register  */

#define OPERAND_CONTROL (0x200)

/* accumulator */

#define OPERAND_ACC     (0x400)

/* @  */

#define OPERAND_ATSIGN  (0x800)

/* @(  */

#define OPERAND_ATPAR   (0x1000)

/* predecrement mode '@-sp'  */

#define OPERAND_ATMINUS (0x2000)

/* this operand changes the instruction name */

/* for example, CPMcc, CMPUcc */

#define OPERAND_NAME    (0x4000)

/* fake operand for mvtsys and mvfsys */

#define OPERAND_SPECIAL (0x8000)

/* let the optimizer know that two registers are affected */

#define OPERAND_2REG    (0x10000)

/* This operand is pc-relative.  Note that repeati can have two immediate

   operands, one of which is pcrel, the other (the IMM6U one) is not.  */

#define OPERAND_PCREL   (0x20000)

/* The format table is an array of struct d30v_format.  */

struct d30v_format

{

  int   form;           /* SHORT_A, LONG, etc */

  int   modifier;       /* two bit modifier following opcode */

  unsigned char operands[5];

};

extern const struct d30v_format d30v_format_table[];

/* an instruction is defined by an opcode and a format */

/* for example, "add" has one opcode, but three different */

/* formats, 2 SHORT_A forms and a LONG form. */

struct d30v_insn

{

  struct d30v_opcode *op;       /* pointer to an entry in the opcode table */

  struct d30v_format *form;     /* pointer to an entry in the format table */

  int ecc;                      /* execution condition code */

};

/* an expressionS only has one register type, so we fake it */

/* by setting high bits to indicate type */

#define REGISTER_MASK   0xFF

#endif /* D30V_H */