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/* Assembler interface for targets using CGEN. -*- C -*-

   CGEN: Cpu tools GENerator

   THIS FILE IS MACHINE GENERATED WITH CGEN.

   - the resultant file is machine generated, cgen-asm.in isn't

   Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2005, 2007, 2008, 2010

   Free Software Foundation, Inc.

   This file is part of libopcodes.

   This library 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.

   It 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 this program; if not, write to the Free Software Foundation, Inc.,

   51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */

/* ??? Eventually more and more of this stuff can go to cpu-independent files.

   Keep that in mind.  */

#include "sysdep.h"

#include <stdio.h>

#include "ansidecl.h"

#include "bfd.h"

#include "symcat.h"

#include "epiphany-desc.h"

#include "epiphany-opc.h"

#include "opintl.h"

#include "xregex.h"

#include "libiberty.h"

#include "safe-ctype.h"

#undef  min

#define min(a,b) ((a) < (b) ? (a) : (b))

#undef  max

#define max(a,b) ((a) > (b) ? (a) : (b))

static const char * parse_insn_normal

  (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *);

/* -- assembler routines inserted here.  */

/* -- asm.c */

const char *

parse_shortregs (CGEN_CPU_DESC cd,

                 const char ** strp,

                 CGEN_KEYWORD * keywords,

                 long * regno)

{

  const char * errmsg;

  /* Parse register.  */

  errmsg = cgen_parse_keyword (cd, strp, keywords, regno);

  if (errmsg)

    return errmsg;

  if (*regno > 7)

    errmsg = _("register unavailable for short instructions");

  return errmsg;

}

static const char * parse_simm_not_reg (CGEN_CPU_DESC, const char **, int,

                                        long *);

static const char *

parse_uimm_not_reg (CGEN_CPU_DESC cd,

                    const char ** strp,

                    int opindex,

                    unsigned long * valuep)

{

  long * svalp = (void *) valuep;

  return parse_simm_not_reg (cd, strp, opindex, svalp);

}

/* Handle simm3/simm11/imm3/imm12.  */

static const char *

parse_simm_not_reg (CGEN_CPU_DESC cd,

                   const char ** strp,

                   int opindex,

                   long * valuep)

{

  const char * errmsg;

  int   sign = 0;

  int   bits = 0;

  switch (opindex)

    {

    case EPIPHANY_OPERAND_SIMM3:

      sign = 1; bits = 3; break;

    case EPIPHANY_OPERAND_SIMM11:

      sign = 1; bits = 11; break;

    case EPIPHANY_OPERAND_DISP3:

      sign = 0; bits = 3; break;

    case EPIPHANY_OPERAND_DISP11:

      /* Load/store displacement is a sign-magnitude 12 bit value.  */

      sign = 0; bits = 11; break;

    }

  /* First try to parse as a register name and reject the operand.  */

  errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names,valuep);

  if (!errmsg)

    return _("register name used as immediate value");

  errmsg = (sign ? cgen_parse_signed_integer (cd, strp, opindex, valuep)

            : cgen_parse_unsigned_integer (cd, strp, opindex,

                                          (unsigned long *) valuep));

  if (errmsg)

    return errmsg;

  if (sign)

    errmsg = cgen_validate_signed_integer (*valuep,

                                          -((1L << bits) - 1), (1 << (bits - 1)) - 1);

  else

    errmsg = cgen_validate_unsigned_integer (*valuep, 0, (1L << bits) - 1);

  return errmsg;

}

static const char *

parse_postindex (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,

                 const char ** strp,

                 int opindex ATTRIBUTE_UNUSED,

                 unsigned long *valuep)

{

  if (**strp == '#')

    ++*strp;                    /* Skip leading hashes.  */

  if (**strp == '-')

    {

      *valuep = 1;

      ++*strp;

    }

  else if (**strp == '+')

    {

      *valuep = 0;

      ++*strp;

    }

  else

    *valuep = 0;

  return NULL;

}

static const char *

parse_imm8 (CGEN_CPU_DESC cd,

            const char ** strp,

            int opindex,

            bfd_reloc_code_real_type code,

            enum cgen_parse_operand_result * result_type,

            bfd_vma * valuep)

{

  const char * errmsg;

  enum cgen_parse_operand_result rt;

  long dummyval;

  if (!result_type)

    result_type = &rt;

  code = BFD_RELOC_NONE;

  if (!cgen_parse_keyword (cd, strp, &epiphany_cgen_opval_gr_names, &dummyval)

      || !cgen_parse_keyword (cd, strp, &epiphany_cgen_opval_cr_names,

                              &dummyval))

    /* Don't treat "mov ip,ip" as a move-immediate.  */

    return _("register source in immediate move");

  errmsg = cgen_parse_address (cd, strp, opindex, code, result_type, valuep);

  if (errmsg)

    return errmsg;

  if (*result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)

    errmsg = cgen_validate_unsigned_integer (*valuep, 0, 0xff);

  else

    errmsg = _("byte relocation unsupported");

  *valuep &= 0xff;

  return errmsg;

}

static const char * MISSING_CLOSE_PARENTHESIS = N_("missing `)'");

static const char *

parse_imm16 (CGEN_CPU_DESC cd,

             const char ** strp,

             int opindex,

             bfd_reloc_code_real_type code ATTRIBUTE_UNUSED,

             enum cgen_parse_operand_result * result_type,

             bfd_vma * valuep)

{

  const char * errmsg;

  enum cgen_parse_operand_result rt;

  long dummyval;

  if (!result_type)

    result_type = &rt;

  if (strncasecmp (*strp, "%high(", 6) == 0)

    {

      *strp += 6;

      errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_EPIPHANY_HIGH,

                                   result_type, valuep);

      if (**strp != ')')

        return MISSING_CLOSE_PARENTHESIS;

      ++*strp;

      *valuep >>= 16;

    }

  else if (strncasecmp (*strp, "%low(", 5) == 0)

    {

      *strp += 5;

      errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_EPIPHANY_LOW,

                                   result_type, valuep);

      if (**strp != ')')

        return MISSING_CLOSE_PARENTHESIS;

      ++*strp;

    }

  else if (!cgen_parse_keyword (cd, strp, &epiphany_cgen_opval_gr_names,

                                &dummyval)

           || !cgen_parse_keyword (cd, strp, &epiphany_cgen_opval_cr_names,

                                   &dummyval))

    /* Don't treat "mov ip,ip" as a move-immediate.  */

    return _("register source in immediate move");

  else

    errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_16,

                                 result_type, valuep);

  if (!errmsg && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)

    errmsg = cgen_validate_unsigned_integer (*valuep, 0, 0xffff);

  *valuep &= 0xffff;

  return errmsg;

}

const char *

parse_branch_addr (CGEN_CPU_DESC cd,

                   const char ** strp,

                   int opindex,

                   int opinfo ATTRIBUTE_UNUSED,

                   enum cgen_parse_operand_result * resultp ATTRIBUTE_UNUSED,

                   bfd_vma *valuep ATTRIBUTE_UNUSED)

{

  const char * errmsg;

  enum cgen_parse_operand_result result_type;

  bfd_reloc_code_real_type code = BFD_RELOC_NONE;

  bfd_vma value;

  switch (opindex)

    {

    case EPIPHANY_OPERAND_SIMM24:

      code = BFD_RELOC_EPIPHANY_SIMM24;

      break;

    case EPIPHANY_OPERAND_SIMM8:

      code = BFD_RELOC_EPIPHANY_SIMM8;

      break;

    default:

      errmsg = _("ABORT: unknown operand");

      return errmsg;

    }

  errmsg = cgen_parse_address (cd, strp, opindex, code,

                               &result_type, &value);

  if (errmsg == NULL)

    {

      if (result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)

        {

          /* Act as if we had done a PC-relative branch, ala .+num.  */

          char buf[20];

          const char * bufp = (const char *) buf;

          sprintf (buf, ".+%ld", (long) value);

          errmsg = cgen_parse_address (cd, &bufp, opindex, code, &result_type,

                                       &value);

        }

      if (result_type == CGEN_PARSE_OPERAND_RESULT_QUEUED)

        {

          /* This will happen for things like (s2-s1) where s2 and s1

             are labels.  */

          /* Nothing further to be done.  */

        }

      else

        errmsg = _("Not a pc-relative address.");

    }

  return errmsg;

}

/* -- dis.c */

const char * epiphany_cgen_parse_operand

  (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);

/* Main entry point for operand parsing.

   This function is basically just a big switch statement.  Earlier versions

   used tables to look up the function to use, but

   - if the table contains both assembler and disassembler functions then

     the disassembler contains much of the assembler and vice-versa,

   - there's a lot of inlining possibilities as things grow,

   - using a switch statement avoids the function call overhead.

   This function could be moved into `parse_insn_normal', but keeping it

   separate makes clear the interface between `parse_insn_normal' and each of

   the handlers.  */

const char *

epiphany_cgen_parse_operand (CGEN_CPU_DESC cd,

                           int opindex,

                           const char ** strp,

                           CGEN_FIELDS * fields)

{

  const char * errmsg = NULL;

  /* Used by scalar operands that still need to be parsed.  */

  long junk ATTRIBUTE_UNUSED;

  switch (opindex)

    {

    case EPIPHANY_OPERAND_DIRECTION :

      errmsg = parse_postindex (cd, strp, EPIPHANY_OPERAND_DIRECTION, (unsigned long *) (& fields->f_addsubx));

      break;

    case EPIPHANY_OPERAND_DISP11 :

      errmsg = parse_uimm_not_reg (cd, strp, EPIPHANY_OPERAND_DISP11, (unsigned long *) (& fields->f_disp11));

      break;

    case EPIPHANY_OPERAND_DISP3 :

      errmsg = cgen_parse_unsigned_integer (cd, strp, EPIPHANY_OPERAND_DISP3, (unsigned long *) (& fields->f_disp3));

      break;

    case EPIPHANY_OPERAND_DPMI :

      errmsg = parse_postindex (cd, strp, EPIPHANY_OPERAND_DPMI, (unsigned long *) (& fields->f_subd));

      break;

    case EPIPHANY_OPERAND_FRD :

      errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rd);

      break;

    case EPIPHANY_OPERAND_FRD6 :

      errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rd6);

      break;

    case EPIPHANY_OPERAND_FRM :

      errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rm);

      break;

    case EPIPHANY_OPERAND_FRM6 :

      errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rm6);

      break;

    case EPIPHANY_OPERAND_FRN :

      errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rn);

      break;

    case EPIPHANY_OPERAND_FRN6 :

      errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rn6);

      break;

    case EPIPHANY_OPERAND_IMM16 :

      {

        bfd_vma value = 0;

        errmsg = parse_imm16 (cd, strp, EPIPHANY_OPERAND_IMM16, 0, NULL,  & value);

        fields->f_imm16 = value;

      }

      break;

    case EPIPHANY_OPERAND_IMM8 :

      {

        bfd_vma value = 0;

        errmsg = parse_imm8 (cd, strp, EPIPHANY_OPERAND_IMM8, 0, NULL,  & value);

        fields->f_imm8 = value;

      }

      break;

    case EPIPHANY_OPERAND_RD :

      errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rd);

      break;

    case EPIPHANY_OPERAND_RD6 :

      errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rd6);

      break;

    case EPIPHANY_OPERAND_RM :

      errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rm);

      break;

    case EPIPHANY_OPERAND_RM6 :

      errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rm6);

      break;

    case EPIPHANY_OPERAND_RN :

      errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rn);

      break;

    case EPIPHANY_OPERAND_RN6 :

      errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rn6);

      break;

    case EPIPHANY_OPERAND_SD :

      errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_cr_names, & fields->f_sd);

      break;

    case EPIPHANY_OPERAND_SD6 :

      errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_cr_names, & fields->f_sd6);

      break;

    case EPIPHANY_OPERAND_SDDMA :

      errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_crdma_names, & fields->f_sd6);

      break;

    case EPIPHANY_OPERAND_SDMEM :

      errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_crmem_names, & fields->f_sd6);

      break;

    case EPIPHANY_OPERAND_SDMESH :

      errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_crmesh_names, & fields->f_sd6);

      break;

    case EPIPHANY_OPERAND_SHIFT :

      errmsg = cgen_parse_unsigned_integer (cd, strp, EPIPHANY_OPERAND_SHIFT, (unsigned long *) (& fields->f_shift));

      break;

    case EPIPHANY_OPERAND_SIMM11 :

      errmsg = parse_simm_not_reg (cd, strp, EPIPHANY_OPERAND_SIMM11, (long *) (& fields->f_sdisp11));

      break;

    case EPIPHANY_OPERAND_SIMM24 :

      {

        bfd_vma value = 0;

        errmsg = parse_branch_addr (cd, strp, EPIPHANY_OPERAND_SIMM24, 0, NULL,  & value);

        fields->f_simm24 = value;

      }

      break;

    case EPIPHANY_OPERAND_SIMM3 :

      errmsg = parse_simm_not_reg (cd, strp, EPIPHANY_OPERAND_SIMM3, (long *) (& fields->f_sdisp3));

      break;

    case EPIPHANY_OPERAND_SIMM8 :

      {

        bfd_vma value = 0;

        errmsg = parse_branch_addr (cd, strp, EPIPHANY_OPERAND_SIMM8, 0, NULL,  & value);

        fields->f_simm8 = value;

      }

      break;

    case EPIPHANY_OPERAND_SN :

      errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_cr_names, & fields->f_sn);

      break;

    case EPIPHANY_OPERAND_SN6 :

      errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_cr_names, & fields->f_sn6);

      break;

    case EPIPHANY_OPERAND_SNDMA :

      errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_crdma_names, & fields->f_sn6);

      break;

    case EPIPHANY_OPERAND_SNMEM :

      errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_crmem_names, & fields->f_sn6);

      break;

    case EPIPHANY_OPERAND_SNMESH :

      errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_crmesh_names, & fields->f_sn6);

      break;

    case EPIPHANY_OPERAND_SWI_NUM :

      errmsg = parse_uimm_not_reg (cd, strp, EPIPHANY_OPERAND_SWI_NUM, (unsigned long *) (& fields->f_trap_num));

      break;

    case EPIPHANY_OPERAND_TRAPNUM6 :

      errmsg = cgen_parse_unsigned_integer (cd, strp, EPIPHANY_OPERAND_TRAPNUM6, (unsigned long *) (& fields->f_trap_num));

      break;

    default :

      /* xgettext:c-format */

      fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);

      abort ();

  }

  return errmsg;

}

cgen_parse_fn * const epiphany_cgen_parse_handlers[] =

{

  parse_insn_normal,

};

void

epiphany_cgen_init_asm (CGEN_CPU_DESC cd)

{

  epiphany_cgen_init_opcode_table (cd);

  epiphany_cgen_init_ibld_table (cd);

  cd->parse_handlers = & epiphany_cgen_parse_handlers[0];

  cd->parse_operand = epiphany_cgen_parse_operand;

#ifdef CGEN_ASM_INIT_HOOK

CGEN_ASM_INIT_HOOK

#endif

}

/* Regex construction routine.

   This translates an opcode syntax string into a regex string,

   by replacing any non-character syntax element (such as an

   opcode) with the pattern '.*'

   It then compiles the regex and stores it in the opcode, for

   later use by epiphany_cgen_assemble_insn

   Returns NULL for success, an error message for failure.  */

char *

epiphany_cgen_build_insn_regex (CGEN_INSN *insn)

{

  CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);

  const char *mnem = CGEN_INSN_MNEMONIC (insn);

  char rxbuf[CGEN_MAX_RX_ELEMENTS];

  char *rx = rxbuf;

  const CGEN_SYNTAX_CHAR_TYPE *syn;

  int reg_err;

  syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));

  /* Mnemonics come first in the syntax string.  */

  if (! CGEN_SYNTAX_MNEMONIC_P (* syn))

    return _("missing mnemonic in syntax string");

  ++syn;

  /* Generate a case sensitive regular expression that emulates case

     insensitive matching in the "C" locale.  We cannot generate a case

     insensitive regular expression because in Turkish locales, 'i' and 'I'

     are not equal modulo case conversion.  */

  /* Copy the literal mnemonic out of the insn.  */

  for (; *mnem; mnem++)

    {

      char c = *mnem;

      if (ISALPHA (c))

        {

          *rx++ = '[';

          *rx++ = TOLOWER (c);

          *rx++ = TOUPPER (c);

          *rx++ = ']';

        }

      else

        *rx++ = c;

    }

  /* Copy any remaining literals from the syntax string into the rx.  */

  for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)

    {

      if (CGEN_SYNTAX_CHAR_P (* syn))

        {

          char c = CGEN_SYNTAX_CHAR (* syn);

          switch (c)

            {

              /* Escape any regex metacharacters in the syntax.  */

            case '.': case '[': case '\\':

            case '*': case '^': case '$':

#ifdef CGEN_ESCAPE_EXTENDED_REGEX

            case '?': case '{': case '}':

            case '(': case ')': case '*':

            case '|': case '+': case ']':

#endif

              *rx++ = '\\';

              *rx++ = c;

              break;

            default:

              if (ISALPHA (c))

                {

                  *rx++ = '[';

                  *rx++ = TOLOWER (c);

                  *rx++ = TOUPPER (c);

                  *rx++ = ']';

                }

              else

                *rx++ = c;

              break;

            }

        }

      else

        {

          /* Replace non-syntax fields with globs.  */

          *rx++ = '.';

          *rx++ = '*';

        }

    }

  /* Trailing whitespace ok.  */

  * rx++ = '[';

  * rx++ = ' ';

  * rx++ = '\t';

  * rx++ = ']';

  * rx++ = '*';

  /* But anchor it after that.  */

  * rx++ = '$';

  * rx = '\0';

  CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));

  reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);

  if (reg_err == 0)

    return NULL;

  else

    {

      static char msg[80];

      regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);

      regfree ((regex_t *) CGEN_INSN_RX (insn));

      free (CGEN_INSN_RX (insn));

      (CGEN_INSN_RX (insn)) = NULL;

      return msg;

    }

}

/* Default insn parser.

   The syntax string is scanned and operands are parsed and stored in FIELDS.

   Relocs are queued as we go via other callbacks.

   ??? Note that this is currently an all-or-nothing parser.  If we fail to

   parse the instruction, we return 0 and the caller will start over from

   the beginning.  Backtracking will be necessary in parsing subexpressions,

   but that can be handled there.  Not handling backtracking here may get

   expensive in the case of the m68k.  Deal with later.

   Returns NULL for success, an error message for failure.  */

static const char *

parse_insn_normal (CGEN_CPU_DESC cd,

                   const CGEN_INSN *insn,

                   const char **strp,

                   CGEN_FIELDS *fields)

{

  /* ??? Runtime added insns not handled yet.  */

  const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);

  const char *str = *strp;

  const char *errmsg;

  const char *p;

  const CGEN_SYNTAX_CHAR_TYPE * syn;

#ifdef CGEN_MNEMONIC_OPERANDS

  /* FIXME: wip */

  int past_opcode_p;

#endif

  /* For now we assume the mnemonic is first (there are no leading operands).

     We can parse it without needing to set up operand parsing.

     GAS's input scrubber will ensure mnemonics are lowercase, but we may

     not be called from GAS.  */

  p = CGEN_INSN_MNEMONIC (insn);

  while (*p && TOLOWER (*p) == TOLOWER (*str))

    ++p, ++str;

  if (* p)

    return _("unrecognized instruction");

#ifndef CGEN_MNEMONIC_OPERANDS

  if (* str && ! ISSPACE (* str))

    return _("unrecognized instruction");

#endif

  CGEN_INIT_PARSE (cd);

  cgen_init_parse_operand (cd);

#ifdef CGEN_MNEMONIC_OPERANDS

  past_opcode_p = 0;

#endif

  /* We don't check for (*str != '\0') here because we want to parse

     any trailing fake arguments in the syntax string.  */

  syn = CGEN_SYNTAX_STRING (syntax);

  /* Mnemonics come first for now, ensure valid string.  */

  if (! CGEN_SYNTAX_MNEMONIC_P (* syn))

    abort ();

  ++syn;