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/* bfin-lex.l  ADI Blackfin lexer

   Copyright 2005, 2006, 2007

   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.  */

%{

#include "as.h"

#include "bfin-defs.h"

#include "bfin-parse.h"

static long parse_int (char **end);

static int parse_halfreg (Register *r, int cl, char *hr);

static int parse_reg (Register *r, int type, char *rt);

int yylex (void);

#define _REG yylval.reg

%}

/* Define Start States ... Actually we will use exclusion.

   If no start state is specified it should match any state

   and  would match some keyword rules only with

   initial.  */

%s KEYWORD

%%

[sS][fF][tT][rR][eE][sS][eE][tT]        _REG.regno = REG_sftreset;  return REG;

[oO][mM][oO][dD][eE]                    _REG.regno = REG_omode;     return REG;

[iI][dD][lL][eE]_[rR][eE][qQ]           _REG.regno = REG_idle_req;  return REG;

[hH][wW][eE][rR][rR][cC][aA][uU][sS][eE] _REG.regno = REG_hwerrcause; return REG;

[eE][xX][cC][aA][uU][sS][eE]            _REG.regno = REG_excause;   return REG;

[eE][mM][uU][cC][aA][uU][sS][eE]        _REG.regno = REG_emucause;  return REG;

[zZ]                                    return Z;

[xX]                                    return X;

[wW]32                                  yylval.value = M_W32; return MMOD;

[wW]                                    return W;

[vV][iI][tT]_[mM][aA][xX]               return VIT_MAX;

[vV]               return V; /* Special: V is a statflag and a modifier.  */

[uU][sS][pP]       _REG.regno = REG_USP; return REG;

[tT][lL]                                return TL;

[tT][hH]                                return TH;

[tT][fF][uU]                            yylval.value = M_TFU; return MMOD;

[tT][eE][sS][tT][sS][eE][tT]            return TESTSET;

[tT]                                    yylval.value = M_T; return MMOD;

[sS]                                                        return S;

[sS][yY][sS][cC][fF][gG]       _REG.regno = REG_SYSCFG; return REG;

[sS][tT][iI]                            return STI;

[sS][sS][yY][nN][cC]                    return SSYNC;

[sS][pP]"."[lL]                         _REG.regno = REG_SP; return HALF_REG;

[sS][pP]"."[hH]                         _REG.regno = REG_SP | F_REG_HIGH; return HALF_REG;

[sS][pP]                                _REG.regno = REG_SP; return REG;

[sS][iI][gG][nN][bB][iI][tT][sS]        return SIGNBITS;

[sS][iI][gG][nN]                        return SIGN;

[sS][eE][qQ][sS][tT][aA][tT]     _REG.regno = REG_SEQSTAT; return REG;

[sS][eE][aA][rR][cC][hH]                return SEARCH;

[sS][hH][iI][fF][tT]                    return SHIFT;

[sS][cC][oO]                            return SCO;

[sS][aA][aA]                            return SAA;

[sS]2[rR][nN][dD]                       yylval.value = M_S2RND; return MMOD;

[rR][tT][xX]                            return RTX;

[rR][tT][sS]                            return RTS;

[rR][tT][nN]                            return RTN;

[rR][tT][iI]                            return RTI;

[rR][tT][eE]                            return RTE;

[rR][oO][tT]                            return ROT;

[rR][nN][dD]20                          return RND20;

[rR][nN][dD]12                          return RND12;

[rR][nN][dD][lL]                        return RNDL;

[rR][nN][dD][hH]                        return RNDH;

[rR][nN][dD]                            return RND;

[rR][0-7]"."[lLhHbB]  return parse_halfreg(&yylval.reg, T_REG_R, yytext);

[rR][eE][tT][sS]                _REG.regno = REG_RETS; return REG;

[rR][eE][tT][iI]                _REG.regno = REG_RETI; return REG;

[rR][eE][tT][xX]                _REG.regno = REG_RETX; return REG;

[rR][eE][tT][nN]                _REG.regno = REG_RETN; return REG;

[rR][eE][tT][eE]                _REG.regno = REG_RETE; return REG;

[eE][mM][uU][dD][aA][tT]        _REG.regno = REG_EMUDAT; return REG;

[rR][aA][iI][sS][eE]            return RAISE;

[rR][0-7]           return parse_reg (&yylval.reg, T_REG_R, yytext);

[rR]      return R;

[pP][rR][nN][tT]                        return PRNT;

[pP][cC]                                return PC;

[pP][aA][cC][kK]                        return PACK;

[pP][0-5]"."[lLhH]  return parse_halfreg (&yylval.reg, T_REG_P, yytext);

[pP][0-5]           return parse_reg (&yylval.reg, T_REG_P, yytext);

[oO][uU][tT][cC]                        return OUTC;

[oO][nN][eE][sS]                        return ONES;

[nN][oO][tT]                            return NOT;

[nN][oO][pP]                            return NOP;

[mM][nN][oO][pP]                        return MNOP;

[nN][sS]                                return NS;

[mM][iI][nN]                            return MIN;

[mM][aA][xX]                            return MAX;

[mM][0-3]"."[lLhH]  return parse_halfreg (&yylval.reg, T_REG_M, yytext);

[mM][0-3]           return parse_reg (&yylval.reg, T_REG_M, yytext);

[mM]                                    return M;

[lL][tT]                                return LT;

[lL][sS][hH][iI][fF][tT]                return LSHIFT;

[lL][sS][eE][tT][uU][pP]                return LSETUP;

[lL][oO][oO][pP]                        return LOOP;

[lL][oO][oO][pP]_[bB][eE][gG][iI][nN]   return LOOP_BEGIN;

[lL][oO][oO][pP]_[eE][nN][dD]           return LOOP_END;

[lL][eE]                                return LE;

[lL][cC]0 _REG.regno = REG_LC0; return REG;

[lL][tT]0 _REG.regno = REG_LT0; return REG;

[lL][bB]0 _REG.regno = REG_LB0; return REG;

[lL][cC]1 _REG.regno = REG_LC1; return REG;

[lL][tT]1 _REG.regno = REG_LT1; return REG;

[lL][bB]1 _REG.regno = REG_LB1; return REG;

[lL][0-3]"."[lLhH]  return parse_halfreg (&yylval.reg, T_REG_L, yytext);

[lL][0-3]           return parse_reg (&yylval.reg, T_REG_L, yytext);

[lL][oO]                                return LO;

[jJ][uU][mM][pP]"."[sS]                 { BEGIN 0; return JUMP_DOT_S;}

[jJ][uU][mM][pP]"."[lL]                 { BEGIN 0; return JUMP_DOT_L;}

[jJ][uU][mM][pP]                        { BEGIN 0; return JUMP;}

[jJ][uU][mM][pP]"."[xX]                 { BEGIN 0; return JUMP_DOT_L; }

[iI][uU]                                yylval.value = M_IU;   return MMOD;

[iI][sS][sS]2                           yylval.value = M_ISS2; return MMOD;

[iI][sS]                                yylval.value = M_IS;   return MMOD;

[iI][hH]                                yylval.value = M_IH;   return MMOD;

[iI][fF]                                return IF;

[iI][0-3]"."[lLhH]  return parse_halfreg (&yylval.reg, T_REG_I, yytext);

[iI][0-3]           return parse_reg (&yylval.reg, T_REG_I, yytext);

[hH][lL][tT]                            return HLT;

[hH][iI]                                return HI;

[gG][tT]                                return GT;

[gG][eE]                                return GE;

[fF][uU]                                yylval.value = M_FU; return MMOD;

[fF][pP]         _REG.regno = REG_FP; return REG;

[fF][pP]"."[lL]  _REG.regno = REG_FP; return HALF_REG;

[fF][pP]"."[hH]  _REG.regno = REG_FP | F_REG_HIGH; return HALF_REG;

[eE][xX][tT][rR][aA][cC][tT]            return EXTRACT;

[eE][xX][pP][aA][dD][jJ]                return EXPADJ;

[eE][xX][cC][pP][tT]                    return EXCPT;

[eE][mM][uU][eE][xX][cC][pP][tT]        return EMUEXCPT;

[dD][iI][vV][sS]                        return DIVS;

[dD][iI][vV][qQ]                        return DIVQ;

[dD][iI][sS][aA][lL][gG][nN][eE][xX][cC][pP][tT]  return DISALGNEXCPT;

[dD][eE][pP][oO][sS][iI][tT]            return DEPOSIT;

[dD][bB][gG][hH][aA][lL][tT]            return DBGHALT;

[dD][bB][gG][cC][mM][pP][lL][xX]        return DBGCMPLX;

[dD][bB][gG][aA][lL]                    return DBGAL;

[dD][bB][gG][aA][hH]                    return DBGAH;

[dD][bB][gG][aA]                        return DBGA;

[dD][bB][gG]                            return DBG;

[cC][yY][cC][lL][eE][sS]2  { _REG.regno = REG_CYCLES2; return REG; }

[cC][yY][cC][lL][eE][sS]  { _REG.regno = REG_CYCLES; return REG; }

[cC][sS][yY][nN][cC]                    return CSYNC;

[cC][oO]                                return CO;

[cC][lL][iI]                            return CLI;

[cC][cC]     _REG.regno = REG_CC; return CCREG;

[cC][aA][lL][lL]"."[xX]                 { BEGIN 0; return CALL;}

[cC][aA][lL][lL]                        { BEGIN 0; return CALL;}

[bB][yY][tT][eE][uU][nN][pP][aA][cC][kK] return BYTEUNPACK;

[bB][yY][tT][eE][pP][aA][cC][kK]        return BYTEPACK;

[bB][yY][tT][eE][oO][pP]16[mM]          return BYTEOP16M;

[bB][yY][tT][eE][oO][pP]16[pP]          return BYTEOP16P;

[bB][yY][tT][eE][oO][pP]3[pP]           return BYTEOP3P;

[bB][yY][tT][eE][oO][pP]2[mM]           return BYTEOP2M;

[bB][yY][tT][eE][oO][pP]2[pP]           return BYTEOP2P;

[bB][yY][tT][eE][oO][pP]1[pP]           return BYTEOP1P;

[bB][yY]                                return BY;

[bB][xX][oO][rR][sS][hH][iI][fF][tT]    return BXORSHIFT;

[bB][xX][oO][rR]                        return BXOR;

[bB][rR][eE][vV]                        return BREV;

[bB][pP]                                return BP;

[bB][iI][tT][tT][sS][tT]                return BITTST;

[bB][iI][tT][tT][gG][lL]                return BITTGL;

[bB][iI][tT][sS][eE][tT]                return BITSET;

[bB][iI][tT][mM][uU][xX]                return BITMUX;

[bB][iI][tT][cC][lL][rR]                return BITCLR;

[bB][0-3]"."[lLhH]  return parse_halfreg (&yylval.reg, T_REG_B, yytext);

[bB][0-3]           return parse_reg (&yylval.reg, T_REG_B, yytext);

[bB]                                    return B;

[aA][zZ]  _REG.regno = S_AZ;   return STATUS_REG;

[aA][nN]  _REG.regno = S_AN;   return STATUS_REG;

[aA][qQ]  _REG.regno = S_AQ;   return STATUS_REG;

[aA][cC]0 _REG.regno = S_AC0;  return STATUS_REG;

[aA][cC]1 _REG.regno = S_AC1;  return STATUS_REG;

[aA][vV]0 _REG.regno = S_AV0;  return STATUS_REG;

[aA][vV]0[sS] _REG.regno = S_AV0S; return STATUS_REG;

[aA][vV]1 _REG.regno = S_AV1;  return STATUS_REG;

[aA][vV]1[sS] _REG.regno = S_AV1S; return STATUS_REG;

[vV] _REG.regno = S_V; return STATUS_REG;

[vV][sS]  _REG.regno = S_VS;   return STATUS_REG;

[aA][sS][tT][aA][tT]   _REG.regno = REG_ASTAT; return REG;

[aA][sS][hH][iI][fF][tT]                return ASHIFT;

[aA][sS][lL]                            return ASL;

[aA][sS][rR]                            return ASR;

[aA][lL][iI][gG][nN]8                   return ALIGN8;

[aA][lL][iI][gG][nN]16                  return ALIGN16;

[aA][lL][iI][gG][nN]24                  return ALIGN24;

[aA]1"."[lL]    return A_ONE_DOT_L;

[aA]0"."[lL]    return A_ZERO_DOT_L;

[aA]1"."[hH]    return A_ONE_DOT_H;

[aA]0"."[hH]    return A_ZERO_DOT_H;

[aA][bB][sS]                            return ABS;

abort                                   return ABORT;

[aA]1"."[xX]    _REG.regno = REG_A1x; return REG;

[aA]1"."[wW]    _REG.regno = REG_A1w; return REG;

[aA]1           _REG.regno = REG_A1;  return REG_A_DOUBLE_ONE;

[aA]0"."[xX]    _REG.regno = REG_A0x; return REG;

[aA]0"."[wW]    _REG.regno = REG_A0w; return REG;

[aA]0           _REG.regno = REG_A0;  return REG_A_DOUBLE_ZERO;

[Gg][Oo][Tt]    return GOT;

[Gg][Oo][Tt]"17"[Mm]"4" return GOT17M4;

[Ff][Uu][Nn][Cc][Dd][Ee][Ss][Cc]"_"[Gg][Oo][Tt]"17"[Mm]"4" return FUNCDESC_GOT17M4;

[Pp][Ll][Tt][Pp][Cc]    return PLTPC;

"~"                     return TILDA;

"|="                    return _BAR_ASSIGN;

"|"                     return BAR;

"^="                    return _CARET_ASSIGN;

"^"                     return CARET;

"]"                     return RBRACK;

"["                     return LBRACK;

">>>="                  return _GREATER_GREATER_GREATER_THAN_ASSIGN;

">>="                   return _GREATER_GREATER_ASSIGN;

">>>"                   return _GREATER_GREATER_GREATER;

">>"                    return GREATER_GREATER;

"=="                    return _ASSIGN_ASSIGN;

"="                     return ASSIGN;

"<="                    return _LESS_THAN_ASSIGN;

"<<="                   return _LESS_LESS_ASSIGN;

"<<"                    return LESS_LESS;

"<"                     return LESS_THAN;

"("                     return LPAREN;

")"                     return RPAREN;

":"                     return COLON;

"/"                     return SLASH;

"-="                    return _MINUS_ASSIGN;

"+|+"                                   return _PLUS_BAR_PLUS;

"-|+"                                   return _MINUS_BAR_PLUS;

"+|-"                                   return _PLUS_BAR_MINUS;

"-|-"                                   return _MINUS_BAR_MINUS;

"--"                    return _MINUS_MINUS;

"-"                     return MINUS;

","                     return COMMA;

"+="                    return _PLUS_ASSIGN;

"++"                    return _PLUS_PLUS;

"+"                     return PLUS;

"*="                    return _STAR_ASSIGN;

"*"                     return STAR;

"&="                    return _AMPERSAND_ASSIGN;

"&"                     return AMPERSAND;

"%"                     return PERCENT;

"!"                     return BANG;

";"                     return SEMICOLON;

"=!"                    return _ASSIGN_BANG;

"||"                    return DOUBLE_BAR;

"@"                     return AT;

[pP][rR][eE][fF][eE][tT][cC][hH]        return PREFETCH;

[uU][nN][lL][iI][nN][kK]                return UNLINK;

[lL][iI][nN][kK]                        return LINK;

[iI][dD][lL][eE]                        return IDLE;

[iI][fF][lL][uU][sS][hH]                return IFLUSH;

[fF][lL][uU][sS][hH][iI][nN][vV]        return FLUSHINV;

[fF][lL][uU][sS][hH]                    return FLUSH;

([0-9]+)|(0[xX][0-9a-fA-F]+)|([bhfodBHOFD]#[0-9a-fA-F]+)|(0.[0-9]+) {

    yylval.value = parse_int (&yytext);

    return NUMBER;

  }

[A-Za-z_$.][A-Za-z0-9_$.]* {

    yylval.symbol = symbol_find_or_make (yytext);

    symbol_mark_used (yylval.symbol);

    return SYMBOL;

  }

[0-9][bfBF] {

    char *name;

    char *ref = strdup (yytext);

    if (ref[1] == 'b' || ref[1] == 'B')

      {

        name = fb_label_name ((int) (ref[0] - '0'), 0);

        yylval.symbol = symbol_find (name);

        if ((yylval.symbol != NULL)

             && (S_IS_DEFINED (yylval.symbol)))

          return SYMBOL;

        as_bad ("backward reference to unknown label %d:",

                                                  (int) (ref[0] - '0'));

      }

    else if (ref[1] == 'f' || ref[1] == 'F')

      {

        /* Forward reference.  Expect symbol to be undefined or

           unknown.  undefined: seen it before.  unknown: never seen

           it before.

           Construct a local label name, then an undefined symbol.

           Just return it as never seen before.  */

        name = fb_label_name ((int) (ref[0] - '0'), 1);

        yylval.symbol = symbol_find_or_make (name);

        /* We have no need to check symbol properties.  */

        return SYMBOL;

      }

  }

[ \t\n]                                    ;

"/*".*"*/"                                 ;

.                                          return yytext[0];

%%

static long parse_int (char **end)

{

  char fmt = '\0';

  int not_done = 1;

  int shiftvalue = 0;

  char * char_bag;

  long value = 0;

  char c;

  char *arg = *end;

  while (*arg && *arg == ' ')

    arg++;

  switch (*arg)

    {

      case '1':

      case '2':

      case '3':

      case '4':

      case '5':

      case '6':

      case '7':

      case '8':

      case '9':

        fmt = 'd';

        break;

      case '0':  /* Accept different formated integers hex octal and binary. */

        {

          c = *++arg;

          arg++;

          if (c == 'x' || c == 'X') /* Hex input.  */

            fmt = 'h';

          else if (c == 'b' || c == 'B')

            fmt = 'b';

          else if (c == '.')

            fmt = 'f';

          else

            {             /* Octal.  */

              arg--;

              fmt = 'o';

            }

          break;

        }

      case 'd':

      case 'D':

      case 'h':

      case 'H':

      case 'o':

      case 'O':

      case 'b':

      case 'B':

      case 'f':

      case 'F':

        {

          fmt = *arg++;

          if (*arg == '#')

            arg++;

        }

    }

  switch (fmt)

    {

      case 'h':

      case 'H':

        shiftvalue = 4;

        char_bag = "0123456789ABCDEFabcdef";

        break;

      case 'o':

      case 'O':

        shiftvalue = 3;

        char_bag = "01234567";

        break;

      case 'b':

      case 'B':

        shiftvalue = 1;

        char_bag = "01";

        break;

/* The assembler allows for fractional constants to be created

   by either the 0.xxxx or the f#xxxx format

   i.e.   0.5 would result in 0x4000

   note .5 would result in the identifier .5.

   The assembler converts to fractional format 1.15 by the simple rule:

             value = (short) (finput * (1 << 15)).  */

      case 'f':

      case 'F':

        {

          float fval = 0.0;

          float pos = 10.0;

          while (1)

            {

              int c;

              c = *arg++;

              if (c >= '0' && c <= '9')

                {

                  float digit = (c - '0') / pos;

                  fval = fval + digit;

                  pos = pos * 10.0;

                }

              else

                {

                  *--arg = c;

                  value = (short) (fval * (1 << 15));

                  break;

                }

            }

          *end = arg+1;

          return value;

        }

      case 'd':

      case 'D':

      default:

        {

          while (1)

            {

              int c;

              c = *arg++;

              if (c >= '0' && c <= '9')

                value = (value * 10) + (c - '0');

              else

                {

                  /* Constants that are suffixed with k|K are multiplied by 1024

                     This suffix is only allowed on decimal constants. */

                  if (c == 'k' || c == 'K')

                    value *= 1024;

                  else

                    *--arg = c;

                  break;

                }

            }

          *end = arg+1;

          return value;

        }

    }

  while (not_done)

    {

      char c;

      c = *arg++;

      if (c == 0 || !index (char_bag, c))

        {

          not_done = 0;

          *--arg = c;

        }

      else

        {

          if (c >= 'a' && c <= 'z')

            c = c - ('a' - '9') + 1;

          else if (c >= 'A' && c <= 'Z')

            c = c - ('A' - '9') + 1;

          c -= '0';

          value = (value << shiftvalue) + c;

        }

    }

  *end = arg+1;

  return value;

}

static int parse_reg (Register *r, int cl, char *rt)

{

  r->regno = cl | (rt[1] - '0');

  return REG;

}

static int parse_halfreg (Register *r, int cl, char *rt)

{

  r->regno = cl | (rt[1] - '0');

  switch (rt[3])

    {

      case 'b':

      case 'B':

        return BYTE_DREG;

      case 'l':

      case 'L':

        break;

      case 'h':

      case 'H':

        r->regno |= F_REG_HIGH;

        break;

    }

  return HALF_REG;

}

/* Our start state is KEYWORD as we have

   command keywords such as PREFETCH.  */

void

set_start_state (void)

{

  BEGIN KEYWORD;

}

#ifndef yywrap

int

yywrap ()

{

  return 1;

}

#endif