ppc-opc.c

Linux内核源代码 为压缩文件 是<<Linux内核>>一书中的源代码

/* ppc-opc.c -- PowerPC opcode list
   Copyright 1994 Free Software Foundation, Inc.
   Written by Ian Lance Taylor, 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
2, 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#include <linux/posix_types.h>
#include "ansidecl.h"
#include "ppc.h"

/* This file holds the PowerPC opcode table.  The opcode table
   includes almost all of the extended instruction mnemonics.  This
   permits the disassembler to use them, and simplifies the assembler
   logic, at the cost of increasing the table size.  The table is
   strictly constant data, so the compiler should be able to put it in
   the .text section.

   This file also holds the operand table.  All knowledge about
   inserting operands into instructions and vice-versa is kept in this
   file.  */

/* Local insertion and extraction functions.  */

static unsigned long insert_bat PARAMS ((unsigned long, long, const char **));
static long extract_bat PARAMS ((unsigned long, int *));
static unsigned long insert_bba PARAMS ((unsigned long, long, const char **));
static long extract_bba PARAMS ((unsigned long, int *));
static unsigned long insert_bd PARAMS ((unsigned long, long, const char **));
static long extract_bd PARAMS ((unsigned long, int *));
static unsigned long insert_bdm PARAMS ((unsigned long, long, const char **));
static long extract_bdm PARAMS ((unsigned long, int *));
static unsigned long insert_bdp PARAMS ((unsigned long, long, const char **));
static long extract_bdp PARAMS ((unsigned long, int *));
static unsigned long insert_bo PARAMS ((unsigned long, long, const char **));
static long extract_bo PARAMS ((unsigned long, int *));
static unsigned long insert_boe PARAMS ((unsigned long, long, const char **));
static long extract_boe PARAMS ((unsigned long, int *));
static unsigned long insert_ds PARAMS ((unsigned long, long, const char **));
static long extract_ds PARAMS ((unsigned long, int *));
static unsigned long insert_li PARAMS ((unsigned long, long, const char **));
static long extract_li PARAMS ((unsigned long, int *));
static unsigned long insert_mbe PARAMS ((unsigned long, long, const char **));
static long extract_mbe PARAMS ((unsigned long, int *));
static unsigned long insert_mb6 PARAMS ((unsigned long, long, const char **));
static long extract_mb6 PARAMS ((unsigned long, int *));
static unsigned long insert_nb PARAMS ((unsigned long, long, const char **));
static long extract_nb PARAMS ((unsigned long, int *));
static unsigned long insert_nsi PARAMS ((unsigned long, long, const char **));
static long extract_nsi PARAMS ((unsigned long, int *));
static unsigned long insert_ral PARAMS ((unsigned long, long, const char **));
static unsigned long insert_ram PARAMS ((unsigned long, long, const char **));
static unsigned long insert_ras PARAMS ((unsigned long, long, const char **));
static unsigned long insert_rbs PARAMS ((unsigned long, long, const char **));
static long extract_rbs PARAMS ((unsigned long, int *));
static unsigned long insert_sh6 PARAMS ((unsigned long, long, const char **));
static long extract_sh6 PARAMS ((unsigned long, int *));
static unsigned long insert_spr PARAMS ((unsigned long, long, const char **));
static long extract_spr PARAMS ((unsigned long, int *));
static unsigned long insert_tbr PARAMS ((unsigned long, long, const char **));
static long extract_tbr PARAMS ((unsigned long, int *));

/* The operands table.

   The fields are bits, shift, signed, insert, extract, flags.  */

const struct powerpc_operand powerpc_operands[] =
{
  /* The zero index is used to indicate the end of the list of
     operands.  */
#define UNUSED (0)
  { 0, 0, 0, 0, 0 },

  /* The BA field in an XL form instruction.  */
#define BA (1)
#define BA_MASK (0x1f << 16)
  { 5, 16, 0, 0, PPC_OPERAND_CR },

  /* The BA field in an XL form instruction when it must be the same
     as the BT field in the same instruction.  */
#define BAT (2)
  { 5, 16, insert_bat, extract_bat, PPC_OPERAND_FAKE },

  /* The BB field in an XL form instruction.  */
#define BB (3)
#define BB_MASK (0x1f << 11)
  { 5, 11, 0, 0, PPC_OPERAND_CR },

  /* The BB field in an XL form instruction when it must be the same
     as the BA field in the same instruction.  */
#define BBA (4)
  { 5, 11, insert_bba, extract_bba, PPC_OPERAND_FAKE },

  /* The BD field in a B form instruction.  The lower two bits are
     forced to zero.  */
#define BD (5)
  { 16, 0, insert_bd, extract_bd, PPC_OPERAND_RELATIVE | PPC_OPERAND_SIGNED },

  /* The BD field in a B form instruction when absolute addressing is
     used.  */
#define BDA (6)
  { 16, 0, insert_bd, extract_bd, PPC_OPERAND_ABSOLUTE | PPC_OPERAND_SIGNED },

  /* The BD field in a B form instruction when the - modifier is used.
     This sets the y bit of the BO field appropriately.  */
#define BDM (7)
  { 16, 0, insert_bdm, extract_bdm,
      PPC_OPERAND_RELATIVE | PPC_OPERAND_SIGNED },

  /* The BD field in a B form instruction when the - modifier is used
     and absolute address is used.  */
#define BDMA (8)
  { 16, 0, insert_bdm, extract_bdm,
      PPC_OPERAND_ABSOLUTE | PPC_OPERAND_SIGNED },

  /* The BD field in a B form instruction when the + modifier is used.
     This sets the y bit of the BO field appropriately.  */
#define BDP (9)
  { 16, 0, insert_bdp, extract_bdp,
      PPC_OPERAND_RELATIVE | PPC_OPERAND_SIGNED },

  /* The BD field in a B form instruction when the + modifier is used
     and absolute addressing is used.  */
#define BDPA (10)
  { 16, 0, insert_bdp, extract_bdp,
      PPC_OPERAND_ABSOLUTE | PPC_OPERAND_SIGNED },

  /* The BF field in an X or XL form instruction.  */
#define BF (11)
  { 3, 23, 0, 0, PPC_OPERAND_CR },

  /* An optional BF field.  This is used for comparison instructions,
     in which an omitted BF field is taken as zero.  */
#define OBF (12)
  { 3, 23, 0, 0, PPC_OPERAND_CR | PPC_OPERAND_OPTIONAL },

  /* The BFA field in an X or XL form instruction.  */
#define BFA (13)
  { 3, 18, 0, 0, PPC_OPERAND_CR },

  /* The BI field in a B form or XL form instruction.  */
#define BI (14)
#define BI_MASK (0x1f << 16)
  { 5, 16, 0, 0, PPC_OPERAND_CR },

  /* The BO field in a B form instruction.  Certain values are
     illegal.  */
#define BO (15)
#define BO_MASK (0x1f << 21)
  { 5, 21, insert_bo, extract_bo, 0 },

  /* The BO field in a B form instruction when the + or - modifier is
     used.  This is like the BO field, but it must be even.  */
#define BOE (16)
  { 5, 21, insert_boe, extract_boe, 0 },

  /* The BT field in an X or XL form instruction.  */
#define BT (17)
  { 5, 21, 0, 0, PPC_OPERAND_CR },

  /* The condition register number portion of the BI field in a B form
     or XL form instruction.  This is used for the extended
     conditional branch mnemonics, which set the lower two bits of the
     BI field.  This field is optional.  */
#define CR (18)
  { 3, 18, 0, 0, PPC_OPERAND_CR | PPC_OPERAND_OPTIONAL },

  /* The D field in a D form instruction.  This is a displacement off
     a register, and implies that the next operand is a register in
     parentheses.  */
#define D (19)
  { 16, 0, 0, 0, PPC_OPERAND_PARENS | PPC_OPERAND_SIGNED },

  /* The DS field in a DS form instruction.  This is like D, but the
     lower two bits are forced to zero.  */
#define DS (20)
  { 16, 0, insert_ds, extract_ds, PPC_OPERAND_PARENS | PPC_OPERAND_SIGNED },

  /* The FL1 field in a POWER SC form instruction.  */
#define FL1 (21)
  { 4, 12, 0, 0, 0 },

  /* The FL2 field in a POWER SC form instruction.  */
#define FL2 (22)
  { 3, 2, 0, 0, 0 },

  /* The FLM field in an XFL form instruction.  */
#define FLM (23)
  { 8, 17, 0, 0, 0 },

  /* The FRA field in an X or A form instruction.  */
#define FRA (24)
#define FRA_MASK (0x1f << 16)
  { 5, 16, 0, 0, PPC_OPERAND_FPR },

  /* The FRB field in an X or A form instruction.  */
#define FRB (25)
#define FRB_MASK (0x1f << 11)
  { 5, 11, 0, 0, PPC_OPERAND_FPR },

  /* The FRC field in an A form instruction.  */
#define FRC (26)
#define FRC_MASK (0x1f << 6)
  { 5, 6, 0, 0, PPC_OPERAND_FPR },

  /* The FRS field in an X form instruction or the FRT field in a D, X
     or A form instruction.  */
#define FRS (27)
#define FRT (FRS)
  { 5, 21, 0, 0, PPC_OPERAND_FPR },

  /* The FXM field in an XFX instruction.  */
#define FXM (28)
#define FXM_MASK (0xff << 12)
  { 8, 12, 0, 0, 0 },

  /* The L field in a D or X form instruction.  */
#define L (29)
  { 1, 21, 0, 0, PPC_OPERAND_OPTIONAL },

  /* The LEV field in a POWER SC form instruction.  */
#define LEV (30)
  { 7, 5, 0, 0, 0 },

  /* The LI field in an I form instruction.  The lower two bits are
     forced to zero.  */
#define LI (31)
  { 26, 0, insert_li, extract_li, PPC_OPERAND_RELATIVE | PPC_OPERAND_SIGNED },

  /* The LI field in an I form instruction when used as an absolute
     address.  */
#define LIA (32)
  { 26, 0, insert_li, extract_li, PPC_OPERAND_ABSOLUTE | PPC_OPERAND_SIGNED },

  /* The MB field in an M form instruction.  */
#define MB (33)
#define MB_MASK (0x1f << 6)
  { 5, 6, 0, 0, 0 },

  /* The ME field in an M form instruction.  */
#define ME (34)
#define ME_MASK (0x1f << 1)
  { 5, 1, 0, 0, 0 },

  /* The MB and ME fields in an M form instruction expressed a single
     operand which is a bitmask indicating which bits to select.  This
     is a two operand form using PPC_OPERAND_NEXT.  See the
     description in opcode/ppc.h for what this means.  */
#define MBE (35)
  { 5, 6, 0, 0, PPC_OPERAND_OPTIONAL | PPC_OPERAND_NEXT },
  { 32, 0, insert_mbe, extract_mbe, 0 },

  /* The MB or ME field in an MD or MDS form instruction.  The high
     bit is wrapped to the low end.  */
#define MB6 (37)
#define ME6 (MB6)
#define MB6_MASK (0x3f << 5)
  { 6, 5, insert_mb6, extract_mb6, 0 },

  /* The NB field in an X form instruction.  The value 32 is stored as
     0.  */
#define NB (38)
  { 6, 11, insert_nb, extract_nb, 0 },

  /* The NSI field in a D form instruction.  This is the same as the
     SI field, only negated.  */
#define NSI (39)
  { 16, 0, insert_nsi, extract_nsi,
      PPC_OPERAND_NEGATIVE | PPC_OPERAND_SIGNED },

  /* The RA field in an D, DS, X, XO, M, or MDS form instruction.  */
#define RA (40)
#define RA_MASK (0x1f << 16)
  { 5, 16, 0, 0, PPC_OPERAND_GPR },

  /* The RA field in a D or X form instruction which is an updating
     load, which means that the RA field may not be zero and may not
     equal the RT field.  */
#define RAL (41)
  { 5, 16, insert_ral, 0, PPC_OPERAND_GPR },

  /* The RA field in an lmw instruction, which has special value
     restrictions.  */
#define RAM (42)
  { 5, 16, insert_ram, 0, PPC_OPERAND_GPR },

  /* The RA field in a D or X form instruction which is an updating
     store or an updating floating point load, which means that the RA
     field may not be zero.  */
#define RAS (43)
  { 5, 16, insert_ras, 0, PPC_OPERAND_GPR },

  /* The RB field in an X, XO, M, or MDS form instruction.  */
#define RB (44)
#define RB_MASK (0x1f << 11)
  { 5, 11, 0, 0, PPC_OPERAND_GPR },

  /* The RB field in an X form instruction when it must be the same as
     the RS field in the instruction.  This is used for extended
     mnemonics like mr.  */
#define RBS (45)
  { 5, 1, insert_rbs, extract_rbs, PPC_OPERAND_FAKE },

  /* The RS field in a D, DS, X, XFX, XS, M, MD or MDS form
     instruction or the RT field in a D, DS, X, XFX or XO form
     instruction.  */
#define RS (46)
#define RT (RS)
#define RT_MASK (0x1f << 21)
  { 5, 21, 0, 0, PPC_OPERAND_GPR },

  /* The SH field in an X or M form instruction.  */
#define SH (47)
#define SH_MASK (0x1f << 11)
  { 5, 11, 0, 0, 0 },

  /* The SH field in an MD form instruction.  This is split.  */
#define SH6 (48)
#define SH6_MASK ((0x1f << 11) | (1 << 1))
  { 6, 1, insert_sh6, extract_sh6, 0 },

  /* The SI field in a D form instruction.  */
#define SI (49)
  { 16, 0, 0, 0, PPC_OPERAND_SIGNED },

  /* The SI field in a D form instruction when we accept a wide range
     of positive values.  */
#define SISIGNOPT (50)
  { 16, 0, 0, 0, PPC_OPERAND_SIGNED | PPC_OPERAND_SIGNOPT },