m68k-parse.h

/* m68k-parse.h -- header file for m68k assembler
   Copyright (C) 1987-2019 Free Software Foundation, Inc.

   This file is part of GAS, the GNU Assembler.

   GAS 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 3, or (at your option)
   any later version.

   GAS 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 GAS; see the file COPYING.  If not, write to the Free
   Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
   02110-1301, USA.  */

#ifndef M68K_PARSE_H
#define M68K_PARSE_H

/* This header file defines things which are shared between the
   operand parser in m68k.y and the m68k assembler proper in
   tc-m68k.c.  */

/* The various m68k registers.  */

/* DATA and ADDR have to be contiguous, so that reg-DATA gives
   0-7==data reg, 8-15==addr reg for operands that take both types.

   We don't use forms like "ADDR0 = ADDR" here because this file is
   likely to be used on an Apollo, and the broken Apollo compiler
   gives an `undefined variable' error if we do that, according to
   troy@cbme.unsw.edu.au.  */

#define DATA DATA0
#define ADDR ADDR0
#define SP ADDR7
#define BAD BAD0
#define BAC BAC0

enum m68k_register
{
  DATA0 = 1,			/*   1- 8 == data registers 0-7 */
  DATA1,
  DATA2,
  DATA3,
  DATA4,
  DATA5,
  DATA6,
  DATA7,

  ADDR0,
  ADDR1,
  ADDR2,
  ADDR3,
  ADDR4,
  ADDR5,
  ADDR6,
  ADDR7,

  FP0,				/* Eight FP registers */
  FP1,
  FP2,
  FP3,
  FP4,
  FP5,
  FP6,
  FP7,

  COP0,				/* Co-processor #0-#7 */
  COP1,
  COP2,
  COP3,
  COP4,
  COP5,
  COP6,
  COP7,

  PC,				/* Program counter */
  ZPC,				/* Hack for Program space, but 0 addressing */
  SR,				/* Status Reg */
  CCR,				/* Condition code Reg */
  ACC,				/* Accumulator Reg0 (EMAC or ACC on MAC).  */
  ACC1,				/* Accumulator Reg 1 (EMAC).  */
  ACC2,				/* Accumulator Reg 2 (EMAC).  */
  ACC3,				/* Accumulator Reg 3 (EMAC).  */
  ACCEXT01,			/* Accumulator extension 0&1 (EMAC).  */
  ACCEXT23,			/* Accumulator extension 2&3 (EMAC).  */
  MACSR,			/* MAC Status Reg */
  MASK,				/* Modulus Reg */

  /* These have to be grouped together for the movec instruction to work.  */
  USP,				/*  User Stack Pointer */
  ISP,				/*  Interrupt stack pointer */
  SFC,
  DFC,
  CACR,
  VBR,
  CAAR,
  CPUCR,
  MSP,
  ITT0,
  ITT1,
  DTT0,
  DTT1,
  MMUSR,
  TC,
  SRP,
  URP,
  BUSCR,			/* 68060 added these.  */
  PCR,
  ROMBAR,			/* mcf5200 added these.  */
  RAMBAR_ALT,			/* Some CF chips have RAMBAR using
				   RAMBAR0's number */
  RAMBAR0,
  RAMBAR1,
  MMUBAR,			/* mcfv4e added these.  */
  ROMBAR0,			/* mcfv4e added these.  */
  ROMBAR1,			/* mcfv4e added these.  */
  MPCR, EDRAMBAR, SECMBAR,	/* mcfv4e added these.  */
  PCR1U0, PCR1L0, PCR1U1, PCR1L1,/* mcfv4e added these.  */
  PCR2U0, PCR2L0, PCR2U1, PCR2L1,/* mcfv4e added these.  */
  PCR3U0, PCR3L0, PCR3U1, PCR3L1,/* mcfv4e added these.  */
  MBAR0, MBAR1,			/* mcfv4e added these.  */
  ACR0, ACR1, ACR2, ACR3,       /* mcf5200 added these.  */
  ACR4, ACR5, ACR6, ACR7,	/* mcf54418 added these.  */
  FLASHBAR, RAMBAR,  		/* mcf528x added these.  */
  MBAR2,  		        /* mcf5249 added this.  */
  MBAR,
  RGPIOBAR,			/* mcf54418 added this.  */
  ASID,				/* m5475.  */
  CAC,  		        /* fido added this.  */
  MBO,
#define last_movec_reg MBO
  /* End of movec ordering constraints.  */

  FPI,
  FPS,
  FPC,

  DRP,				/* 68851 or 68030 MMU regs */
  CRP,
  CAL,
  VAL,
  SCC,
  AC,
  BAD0,
  BAD1,
  BAD2,
  BAD3,
  BAD4,
  BAD5,
  BAD6,
  BAD7,
  BAC0,
  BAC1,
  BAC2,
  BAC3,
  BAC4,
  BAC5,
  BAC6,
  BAC7,
  PSR,				/* aka MMUSR on 68030 (but not MMUSR on 68040)
				   and ACUSR on 68ec030 */
  PCSR,

  IC,				/* instruction cache token */
  DC,				/* data cache token */
  NC,				/* no cache token */
  BC,				/* both caches token */

  TT0,				/* 68030 access control unit regs */
  TT1,

  ZDATA0,			/* suppressed data registers.  */
  ZDATA1,
  ZDATA2,
  ZDATA3,
  ZDATA4,
  ZDATA5,
  ZDATA6,
  ZDATA7,

  ZADDR0,			/* suppressed address registers.  */
  ZADDR1,
  ZADDR2,
  ZADDR3,
  ZADDR4,
  ZADDR5,
  ZADDR6,
  ZADDR7,

  /* Upper and lower half of data and address registers.  Order *must*
     be DATAxL, ADDRxL, DATAxU, ADDRxU.  */
  DATA0L,			/* lower half of data registers */
  DATA1L,
  DATA2L,
  DATA3L,
  DATA4L,
  DATA5L,
  DATA6L,
  DATA7L,

  ADDR0L,			/* lower half of address registers */
  ADDR1L,
  ADDR2L,
  ADDR3L,
  ADDR4L,
  ADDR5L,
  ADDR6L,
  ADDR7L,

  DATA0U,			/* upper half of data registers */
  DATA1U,
  DATA2U,
  DATA3U,
  DATA4U,
  DATA5U,
  DATA6U,
  DATA7U,

  ADDR0U,			/* upper half of address registers */
  ADDR1U,
  ADDR2U,
  ADDR3U,
  ADDR4U,
  ADDR5U,
  ADDR6U,
  ADDR7U,
};

/* Size information.  */

enum m68k_size
{
  /* Unspecified.  */
  SIZE_UNSPEC,

  /* Byte.  */
  SIZE_BYTE,

  /* Word (2 bytes).  */
  SIZE_WORD,

  /* Longword (4 bytes).  */
  SIZE_LONG
};

/* The structure used to hold information about an index register.  */

struct m68k_indexreg
{
  /* The index register itself.  */
  enum m68k_register reg;

  /* The size to use.  */
  enum m68k_size size;

  /* The value to scale by.  */
  int scale;
};

#ifdef OBJ_ELF
/* The type of a PIC expression.  */

enum pic_relocation
{
  pic_none,			/* not pic */
  pic_plt_pcrel,		/* @PLTPC */
  pic_got_pcrel,		/* @GOTPC */
  pic_plt_off,			/* @PLT */
  pic_got_off,			/* @GOT */
  pic_tls_gd,			/* @TLSGD */
  pic_tls_ldm,			/* @TLSLDM */
  pic_tls_ldo,			/* @TLSLDO */
  pic_tls_ie,			/* @TLSIE */
  pic_tls_le			/* @TLSLE */
};
#endif

/* The structure used to hold information about an expression.  */

struct m68k_exp
{
  /* The size to use.  */
  enum m68k_size size;

#ifdef OBJ_ELF
  /* The type of pic relocation if any.  */
  enum pic_relocation pic_reloc;
#endif

  /* The expression itself.  */
  expressionS exp;
};

/* The operand modes.  */

enum m68k_operand_type
{
  IMMED = 1,
  ABSL,
  DREG,
  AREG,
  FPREG,
  CONTROL,
  AINDR,
  AINC,
  ADEC,
  DISP,
  BASE,
  POST,
  PRE,
  LSH,  /* MAC/EMAC scalefactor '<<'.  */
  RSH,  /* MAC/EMAC scalefactor '>>'.  */
  REGLST
};

/* The structure used to hold a parsed operand.  */

struct m68k_op
{
  /* The type of operand.  */
  enum m68k_operand_type mode;

  /* The main register.  */
  enum m68k_register reg;

  /* The register mask for mode REGLST.  */
  unsigned long mask;

  /* An error message.  */
  const char *error;

  /* The index register.  */
  struct m68k_indexreg index;

  /* The displacement.  */
  struct m68k_exp disp;

  /* The outer displacement.  */
  struct m68k_exp odisp;

  /* Is a trailing '&' added to an <ea>? (for MAC/EMAC mask addressing).  */
  int trailing_ampersand;
};

#endif /* ! defined (M68K_PARSE_H) */

/* The parsing function.  */

extern int m68k_ip_op (char *, struct m68k_op *);

/* Whether register prefixes are optional.  */
extern int flag_reg_prefix_optional;