gas/config/bfin-lex.l

   1 /* bfin-lex.l  ADI Blackfin lexer
   2    Copyright 2005
   3    Free Software Foundation, Inc.
   4
   5    This file is part of GAS, the GNU Assembler.
   6
   7    GAS is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2, or (at your option)
  10    any later version.
  11
  12    GAS is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GAS; see the file COPYING.  If not, write to the Free
  19    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  20    02110-1301, USA.  */
  21 %{
  22
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include "bfin-defs.h"
  26 #include "bfin-parse.h"
  27 #include "as.h"
  28
  29 static long parse_int (char **end);
  30 static int parse_halfreg (Register *r, int cl, char *hr);
  31 static int parse_reg (Register *r, int type, char *rt);
  32 int yylex (void);
  33
  34 #define _REG yylval.reg
  35
  36
  37 %}
  38
  39 /* Define Start States ... Actually we will use exclusion.
  40    If no start state is specified it should match any state
  41    and <INITIAL> would match some keyword rules only with
  42    initial.  */
  43 %s KEYWORD
  44
  45 %%
  46 [sS][fF][tT][rR][eE][sS][eE][tT]        _REG.regno = REG_sftreset;  return REG;
  47 [oO][mM][oO][dD][eE]                    _REG.regno = REG_omode;     return REG;
  48 [iI][dD][lL][eE]_[rR][eE][qQ]           _REG.regno = REG_idle_req;  return REG;
  49 [hH][wW][eE][rR][rR][cC][aA][uU][sS][eE] _REG.regno = REG_hwerrcause; return REG;
  50 [eE][xX][cC][aA][uU][sS][eE]            _REG.regno = REG_excause;   return REG;
  51 [eE][mM][uU][cC][aA][uU][sS][eE]        _REG.regno = REG_emucause;  return REG;
  52 [zZ]                                    return Z;
  53 [xX]                                    return X;
  54 [wW]32                                  yylval.value = M_W32; return MMOD;
  55 [wW]                                    return W;
  56 [vV][iI][tT]_[mM][aA][xX]               return VIT_MAX;
  57 [vV]               return V; /* Special: V is a statflag and a modifier.  */
  58 [uU][sS][pP]       _REG.regno = REG_USP; return REG;
  59 [tT][lL]                                return TL;
  60 [tT][hH]                                return TH;
  61 [tT][fF][uU]                            yylval.value = M_TFU; return MMOD;
  62 [tT][eE][sS][tT][sS][eE][tT]            return TESTSET;
  63 [tT]                                    yylval.value = M_T; return MMOD;
  64 [sS]                                                        return S;
  65 [sS][yY][sS][cC][fF][gG]       _REG.regno = REG_SYSCFG; return REG;
  66 [sS][tT][iI]                            return STI;
  67 [sS][sS][yY][nN][cC]                    return SSYNC;
  68 [sS][pP]"."[lL]                         _REG.regno = REG_SP; return HALF_REG;
  69 [sS][pP]"."[hH]                         _REG.regno = REG_SP | F_REG_HIGH; return HALF_REG;
  70 [sS][pP]                                _REG.regno = REG_SP; return REG;
  71 [sS][iI][gG][nN][bB][iI][tT][sS]        return SIGNBITS;
  72 [sS][iI][gG][nN]                        return SIGN;
  73 [sS][eE][qQ][sS][tT][aA][tT]     _REG.regno = REG_SEQSTAT; return REG;
  74 [sS][eE][aA][rR][cC][hH]                return SEARCH;
  75 [sS][hH][iI][fF][tT]                    return SHIFT;
  76 [sS][cC][oO]                            return SCO;
  77
  78 [sS][aA][aA]                            return SAA;
  79 [sS]2[rR][nN][dD]                       yylval.value = M_S2RND; return MMOD;
  80 [rR][tT][xX]                            return RTX;
  81 [rR][tT][sS]                            return RTS;
  82 [rR][tT][nN]                            return RTN;
  83 [rR][tT][iI]                            return RTI;
  84 [rR][tT][eE]                            return RTE;
  85 [rR][oO][tT]                            return ROT;
  86 [rR][nN][dD]20                          return RND20;
  87 [rR][nN][dD]12                          return RND12;
  88 [rR][nN][dD][lL]                        return RNDL;
  89 [rR][nN][dD][hH]                        return RNDH;
  90 [rR][nN][dD]                            return RND;
  91
  92 [rR][0-7]"."[lLhHbB]  return parse_halfreg(&yylval.reg, T_REG_R, yytext);
  93
  94 [rR][eE][tT][sS]                _REG.regno = REG_RETS; return REG;
  95 [rR][eE][tT][iI]                _REG.regno = REG_RETI; return REG;
  96 [rR][eE][tT][xX]                _REG.regno = REG_RETX; return REG;
  97 [rR][eE][tT][nN]                _REG.regno = REG_RETN; return REG;
  98 [rR][eE][tT][eE]                _REG.regno = REG_RETE; return REG;
  99 [eE][mM][uU][dD][aA][tT]        _REG.regno = REG_EMUDAT; return REG;
 100 [rR][aA][iI][sS][eE]            return RAISE;
 101
 102 [rR][0-7]           return parse_reg (&yylval.reg, T_REG_R, yytext);
 103
 104 [rR]      return R;
 105 [pP][rR][nN][tT]                        return PRNT;
 106 [pP][cC]                                return PC;
 107 [pP][aA][cC][kK]                        return PACK;
 108
 109 [pP][0-5]"."[lLhH]  return parse_halfreg (&yylval.reg, T_REG_P, yytext);
 110 [pP][0-5]           return parse_reg (&yylval.reg, T_REG_P, yytext);
 111
 112 [oO][uU][tT][cC]                        return OUTC;
 113 [oO][nN][eE][sS]                        return ONES;
 114
 115 [nN][oO][tT]                            return NOT;
 116 [nN][oO][pP]                            return NOP;
 117 [mM][nN][oO][pP]                        return MNOP;
 118 [nN][sS]                                return NS;
 119
 120
 121 [mM][iI][nN]                            return MIN;
 122 [mM][aA][xX]                            return MAX;
 123
 124 [mM][0-3]"."[lLhH]  return parse_halfreg (&yylval.reg, T_REG_M, yytext);
 125 [mM][0-3]           return parse_reg (&yylval.reg, T_REG_M, yytext);
 126
 127 [mM]                                    return M;
 128 [lL][tT]                                return LT;
 129 [lL][sS][hH][iI][fF][tT]                return LSHIFT;
 130 [lL][sS][eE][tT][uU][pP]                return LSETUP;
 131 [lL][oO][oO][pP]                        return LOOP;
 132 [lL][oO][oO][pP]_[bB][eE][gG][iI][nN]   return LOOP_BEGIN;
 133 [lL][oO][oO][pP]_[eE][nN][dD]           return LOOP_END;
 134
 135 [lL][eE]                                return LE;
 136 [lL][cC]0 _REG.regno = REG_LC0; return REG;
 137 [lL][tT]0 _REG.regno = REG_LT0; return REG;
 138 [lL][bB]0 _REG.regno = REG_LB0; return REG;
 139 [lL][cC]1 _REG.regno = REG_LC1; return REG;
 140 [lL][tT]1 _REG.regno = REG_LT1; return REG;
 141 [lL][bB]1 _REG.regno = REG_LB1; return REG;
 142
 143 [lL][0-3]"."[lLhH]  return parse_halfreg (&yylval.reg, T_REG_L, yytext);
 144 [lL][0-3]           return parse_reg (&yylval.reg, T_REG_L, yytext);
 145 [lL][oO]                                return LO;
 146 [jJ][uU][mM][pP]"."[sS]                 { BEGIN 0; return JUMP_DOT_S;}
 147 [jJ][uU][mM][pP]"."[lL]                 { BEGIN 0; return JUMP_DOT_L;}
 148 [jJ][uU][mM][pP]                        { BEGIN 0; return JUMP;}
 149 [jJ][uU][mM][pP]"."[xX]                 { BEGIN 0; return JUMP_DOT_L; }
 150 [iI][uU]                                yylval.value = M_IU;   return MMOD;
 151 [iI][sS][sS]2                           yylval.value = M_ISS2; return MMOD;
 152 [iI][sS]                                yylval.value = M_IS;   return MMOD;
 153 [iI][hH]                                yylval.value = M_IH;   return MMOD;
 154 [iI][fF]                                return IF;
 155 [iI][0-3]"."[lLhH]  return parse_halfreg (&yylval.reg, T_REG_I, yytext);
 156 [iI][0-3]           return parse_reg (&yylval.reg, T_REG_I, yytext);
 157 [hH][lL][tT]                            return HLT;
 158 [hH][iI]                                return HI;
 159 [gG][tT]                                return GT;
 160 [gG][eE]                                return GE;
 161 [fF][uU]                                yylval.value = M_FU; return MMOD;
 162 [fF][pP]         _REG.regno = REG_FP; return REG;
 163 [fF][pP]"."[lL]  _REG.regno = REG_FP; return HALF_REG;
 164 [fF][pP]"."[hH]  _REG.regno = REG_FP | F_REG_HIGH; return HALF_REG;
 165
 166 [eE][xX][tT][rR][aA][cC][tT]            return EXTRACT;
 167 [eE][xX][pP][aA][dD][jJ]                return EXPADJ;
 168 [eE][xX][cC][pP][tT]                    return EXCPT;
 169 [eE][mM][uU][eE][xX][cC][pP][tT]        return EMUEXCPT;
 170 [dD][iI][vV][sS]                        return DIVS;
 171 [dD][iI][vV][qQ]                        return DIVQ;
 172 [dD][iI][sS][aA][lL][gG][nN][eE][xX][cC][pP][tT]  return DISALGNEXCPT;
 173 [dD][eE][pP][oO][sS][iI][tT]            return DEPOSIT;
 174 [dD][bB][gG][hH][aA][lL][tT]            return DBGHALT;
 175 [dD][bB][gG][cC][mM][pP][lL][xX]        return DBGCMPLX;
 176 [dD][bB][gG][aA][lL]                    return DBGAL;
 177 [dD][bB][gG][aA][hH]                    return DBGAH;
 178 [dD][bB][gG][aA]                        return DBGA;
 179 [dD][bB][gG]                            return DBG;
 180 [cC][yY][cC][lL][eE][sS]2  { _REG.regno = REG_CYCLES2; return REG; }
 181 [cC][yY][cC][lL][eE][sS]  { _REG.regno = REG_CYCLES; return REG; }
 182 [cC][sS][yY][nN][cC]                    return CSYNC;
 183 [cC][oO]                                return CO;
 184 [cC][lL][iI]                            return CLI;
 185
 186 [cC][cC]     _REG.regno = REG_CC; return CCREG;
 187 [cC][aA][lL][lL]"."[xX]                 { BEGIN 0; return CALL;}
 188 [cC][aA][lL][lL]                        { BEGIN 0; return CALL;}
 189 [bB][yY][tT][eE][uU][nN][pP][aA][cC][kK] return BYTEUNPACK;
 190 [bB][yY][tT][eE][pP][aA][cC][kK]        return BYTEPACK;
 191 [bB][yY][tT][eE][oO][pP]16[mM]          return BYTEOP16M;
 192 [bB][yY][tT][eE][oO][pP]16[pP]          return BYTEOP16P;
 193 [bB][yY][tT][eE][oO][pP]3[pP]           return BYTEOP3P;
 194 [bB][yY][tT][eE][oO][pP]2[mM]           return BYTEOP2M;
 195 [bB][yY][tT][eE][oO][pP]2[pP]           return BYTEOP2P;
 196 [bB][yY][tT][eE][oO][pP]1[pP]           return BYTEOP1P;
 197 [bB][yY]                                return BY;
 198 [bB][xX][oO][rR][sS][hH][iI][fF][tT]    return BXORSHIFT;
 199 [bB][xX][oO][rR]                        return BXOR;
 200
 201 [bB][rR][eE][vV]                        return BREV;
 202 [bB][pP]                                return BP;
 203 [bB][iI][tT][tT][sS][tT]                return BITTST;
 204 [bB][iI][tT][tT][gG][lL]                return BITTGL;
 205 [bB][iI][tT][sS][eE][tT]                return BITSET;
 206 [bB][iI][tT][mM][uU][xX]                return BITMUX;
 207 [bB][iI][tT][cC][lL][rR]                return BITCLR;
 208 [bB][0-3]"."[lLhH]  return parse_halfreg (&yylval.reg, T_REG_B, yytext);
 209 [bB][0-3]           return parse_reg (&yylval.reg, T_REG_B, yytext);
 210 [bB]                                    return B;
 211 [aA][zZ]  _REG.regno = S_AZ;   return STATUS_REG;
 212 [aA][nN]  _REG.regno = S_AN;   return STATUS_REG;
 213 [aA][qQ]  _REG.regno = S_AQ;   return STATUS_REG;
 214 [aA][cC]0 _REG.regno = S_AC0;  return STATUS_REG;
 215 [aA][cC]1 _REG.regno = S_AC1;  return STATUS_REG;
 216 [aA][vV]0 _REG.regno = S_AV0;  return STATUS_REG;
 217 [aA][vV]0[sS] _REG.regno = S_AV0S; return STATUS_REG;
 218 [aA][vV]1 _REG.regno = S_AV1;  return STATUS_REG;
 219 [aA][vV]1[sS] _REG.regno = S_AV1S; return STATUS_REG;
 220 [vV] _REG.regno = S_V; return STATUS_REG;
 221 [vV][sS]  _REG.regno = S_VS;   return STATUS_REG;
 222
 223
 224 [aA][sS][tT][aA][tT]   _REG.regno = REG_ASTAT; return REG;
 225 [aA][sS][hH][iI][fF][tT]                return ASHIFT;
 226 [aA][sS][lL]                            return ASL;
 227 [aA][sS][rR]                            return ASR;
 228 [aA][lL][iI][gG][nN]8                   return ALIGN8;
 229 [aA][lL][iI][gG][nN]16                  return ALIGN16;
 230 [aA][lL][iI][gG][nN]24                  return ALIGN24;
 231 [aA]1"."[lL]    return A_ONE_DOT_L;
 232 [aA]0"."[lL]    return A_ZERO_DOT_L;
 233 [aA]1"."[hH]    return A_ONE_DOT_H;
 234 [aA]0"."[hH]    return A_ZERO_DOT_H;
 235 [aA][bB][sS]                            return ABS;
 236 abort                                   return ABORT;
 237 [aA]1"."[xX]    _REG.regno = REG_A1x; return REG;
 238 [aA]1"."[wW]    _REG.regno = REG_A1w; return REG;
 239 [aA]1           _REG.regno = REG_A1;  return REG_A_DOUBLE_ONE;
 240 [aA]0"."[xX]    _REG.regno = REG_A0x; return REG;
 241 [aA]0"."[wW]    _REG.regno = REG_A0w; return REG;
 242 [aA]0           _REG.regno = REG_A0;  return REG_A_DOUBLE_ZERO;
 243 [Gg][Oo][Tt]    return GOT;
 244 [Gg][Oo][Tt]"17"[Mm]"4" return GOT17M4;
 245 [Ff][Uu][Nn][Cc][Dd][Ee][Ss][Cc]"_"[Gg][Oo][Tt]"17"[Mm]"4" return FUNCDESC_GOT17M4;
 246 [Pp][Ll][Tt][Pp][Cc]    return PLTPC;
 247
 248
 249 "~"                     return TILDA;
 250 "|="                    return _BAR_ASSIGN;
 251 "|"                     return BAR;
 252 "^="                    return _CARET_ASSIGN;
 253 "^"                     return CARET;
 254 "]"                     return RBRACK;
 255 "["                     return LBRACK;
 256 ">>>="                  return _GREATER_GREATER_GREATER_THAN_ASSIGN;
 257 ">>="                   return _GREATER_GREATER_ASSIGN;
 258 ">>>"                   return _GREATER_GREATER_GREATER;
 259 ">>"                    return GREATER_GREATER;
 260 "=="                    return _ASSIGN_ASSIGN;
 261 "="                     return ASSIGN;
 262 "<="                    return _LESS_THAN_ASSIGN;
 263 "<<="                   return _LESS_LESS_ASSIGN;
 264 "<<"                    return LESS_LESS;
 265 "<"                     return LESS_THAN;
 266 "("                     return LPAREN;
 267 ")"                     return RPAREN;
 268 ":"                     return COLON;
 269 "/"                     return SLASH;
 270 "-="                    return _MINUS_ASSIGN;
 271 "+|+"                                   return _PLUS_BAR_PLUS;
 272 "-|+"                                   return _MINUS_BAR_PLUS;
 273 "+|-"                                   return _PLUS_BAR_MINUS;
 274 "-|-"                                   return _MINUS_BAR_MINUS;
 275 "--"                    return _MINUS_MINUS;
 276 "-"                     return MINUS;
 277 ","                     return COMMA;
 278 "+="                    return _PLUS_ASSIGN;
 279 "++"                    return _PLUS_PLUS;
 280 "+"                     return PLUS;
 281 "*="                    return _STAR_ASSIGN;
 282 "*"                     return STAR;
 283 "&="                    return _AMPERSAND_ASSIGN;
 284 "&"                     return AMPERSAND;
 285 "%"                     return PERCENT;
 286 "!"                     return BANG;
 287 ";"                     return SEMICOLON;
 288 "=!"                    return _ASSIGN_BANG;
 289 "||"                    return DOUBLE_BAR;
 290 "@"                     return AT;
 291 <KEYWORD>[pP][rR][eE][fF][eE][tT][cC][hH]        return PREFETCH;
 292 <KEYWORD>[uU][nN][lL][iI][nN][kK]                return UNLINK;
 293 <KEYWORD>[lL][iI][nN][kK]                        return LINK;
 294 <KEYWORD>[iI][dD][lL][eE]                        return IDLE;
 295 <KEYWORD>[iI][fF][lL][uU][sS][hH]                return IFLUSH;
 296 <KEYWORD>[fF][lL][uU][sS][hH][iI][nN][vV]        return FLUSHINV;
 297 <KEYWORD>[fF][lL][uU][sS][hH]                    return FLUSH;
 298 ([0-9]+)|(0[xX][0-9a-fA-F]+)|([bhfodBHOFD]#[0-9a-fA-F]+)|(0.[0-9]+) {
 299     yylval.value = parse_int (&yytext);
 300     return NUMBER;
 301   }
 302 [A-Za-z_$.][A-Za-z0-9_$.]* {
 303     yylval.symbol = symbol_find_or_make (yytext);
 304     symbol_mark_used (yylval.symbol);
 305     return SYMBOL;
 306   }
 307 [0-9][bfBF] {
 308     char *name;
 309     char *ref = strdup (yytext);
 310     if (ref[1] == 'b' || ref[1] == 'B')
 311       {
 312         name = fb_label_name ((int) (ref[0] - '0'), 0);
 313         yylval.symbol = symbol_find (name);
 314
 315         if ((yylval.symbol != NULL)
 316              && (S_IS_DEFINED (yylval.symbol)))
 317           return SYMBOL;
 318         as_bad ("backward reference to unknown label %d:",
 319                                                   (int) (ref[0] - '0'));
 320       }
 321     else if (ref[1] == 'f' || ref[1] == 'F')
 322       {
 323         /* Forward reference.  Expect symbol to be undefined or
 324            unknown.  undefined: seen it before.  unknown: never seen
 325            it before.
 326
 327            Construct a local label name, then an undefined symbol.
 328            Just return it as never seen before.  */
 329
 330         name = fb_label_name ((int) (ref[0] - '0'), 1);
 331         yylval.symbol = symbol_find_or_make (name);
 332         /* We have no need to check symbol properties.  */
 333         return SYMBOL;
 334       }
 335   }
 336 [ \t\n]                                    ;
 337 "/*".*"*/"                                 ;
 338 .                                          return yytext[0];
 339 %%
 340 static long parse_int (char **end)
 341 {
 342   char fmt = '\0';
 343   int not_done = 1;
 344   int shiftvalue = 0;
 345   char * char_bag;
 346   long value = 0;
 347   char c;
 348   char *arg = *end;
 349
 350   while (*arg && *arg == ' ')
 351     arg++;
 352
 353   switch (*arg)
 354     {
 355       case '1':
 356       case '2':
 357       case '3':
 358       case '4':
 359       case '5':
 360       case '6':
 361       case '7':
 362       case '8':
 363       case '9':
 364         fmt = 'd';
 365         break;
 366
 367       case '0':  /* Accept different formated integers hex octal and binary. */
 368         {
 369           c = *++arg;
 370           arg++;
 371           if (c == 'x' || c == 'X') /* Hex input.  */
 372             fmt = 'h';
 373           else if (c == 'b' || c == 'B')
 374             fmt = 'b';
 375           else if (c == '.')
 376             fmt = 'f';
 377           else
 378             {             /* Octal.  */
 379               arg--;
 380               fmt = 'o';
 381             }
 382           break;
 383         }
 384
 385       case 'd':
 386       case 'D':
 387       case 'h':
 388       case 'H':
 389       case 'o':
 390       case 'O':
 391       case 'b':
 392       case 'B':
 393       case 'f':
 394       case 'F':
 395         {
 396           fmt = *arg++;
 397           if (*arg == '#')
 398             arg++;
 399         }
 400     }
 401
 402   switch (fmt)
 403     {
 404       case 'h':
 405       case 'H':
 406         shiftvalue = 4;
 407         char_bag = "0123456789ABCDEFabcdef";
 408         break;
 409
 410       case 'o':
 411       case 'O':
 412         shiftvalue = 3;
 413         char_bag = "01234567";
 414         break;
 415
 416       case 'b':
 417       case 'B':
 418         shiftvalue = 1;
 419         char_bag = "01";
 420         break;
 421
 422 /* The assembler allows for fractional constants to be created
 423    by either the 0.xxxx or the f#xxxx format
 424
 425    i.e.   0.5 would result in 0x4000
 426
 427    note .5 would result in the identifier .5.
 428
 429    The assembler converts to fractional format 1.15 by the simple rule:
 430
 431              value = (short) (finput * (1 << 15)).  */
 432
 433       case 'f':
 434       case 'F':
 435         {
 436           float fval = 0.0;
 437           float pos = 10.0;
 438           while (1)
 439             {
 440               int c;
 441               c = *arg++;
 442
 443               if (c >= '0' && c <= '9')
 444                 {
 445                   float digit = (c - '0') / pos;
 446                   fval = fval + digit;
 447                   pos = pos * 10.0;
 448                 }
 449               else
 450                 {
 451                   *--arg = c;
 452                   value = (short) (fval * (1 << 15));
 453                   break;
 454                 }
 455             }
 456           *end = arg+1;
 457           return value;
 458         }
 459
 460       case 'd':
 461       case 'D':
 462       default:
 463         {
 464           while (1)
 465             {
 466               int c;
 467               c = *arg++;
 468               if (c >= '0' && c <= '9')
 469                 value = (value * 10) + (c - '0');
 470               else
 471                 {
 472                   /* Constants that are suffixed with k|K are multiplied by 1024
 473                      This suffix is only allowed on decimal constants. */
 474                   if (c == 'k' || c == 'K')
 475                     value *= 1024;
 476                   else
 477                     *--arg = c;
 478                   break;
 479                 }
 480             }
 481           *end = arg+1;
 482           return value;
 483         }
 484     }
 485
 486   while (not_done)
 487     {
 488       char c;
 489       c = *arg++;
 490       if (c == 0 || !index (char_bag, c))
 491         {
 492           not_done = 0;
 493           *--arg = c;
 494         }
 495       else
 496         {
 497           if (c >= 'a' && c <= 'z')
 498             c = c - ('a' - '9') + 1;
 499           else if (c >= 'A' && c <= 'Z')
 500             c = c - ('A' - '9') + 1;
 501
 502           c -= '0';
 503           value = (value << shiftvalue) + c;
 504         }
 505     }
 506   *end = arg+1;
 507   return value;
 508 }
 509
 510
 511 static int parse_reg (Register *r, int cl, char *rt)
 512 {
 513   r->regno = cl | (rt[1] - '0');
 514   return REG;
 515 }
 516
 517 static int parse_halfreg (Register *r, int cl, char *rt)
 518 {
 519   r->regno = cl | (rt[1] - '0');
 520
 521   switch (rt[3])
 522     {
 523       case 'b':
 524       case 'B':
 525         return BYTE_DREG;
 526
 527       case 'l':
 528       case 'L':
 529         break;
 530
 531       case 'h':
 532       case 'H':
 533         r->regno |= F_REG_HIGH;
 534         break;
 535     }
 536
 537   return HALF_REG;
 538 }
 539
 540 /* Our start state is KEYWORD as we have
 541    command keywords such as PREFETCH.  */
 542
 543 void
 544 set_start_state (void)
 545 {
 546   BEGIN KEYWORD;
 547 }
 548
 549
 550 #ifndef yywrap
 551 int
 552 yywrap ()
 553 {
 554   return 1;
 555 }
 556 #endif