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
parse_reg(Register * r,int cl,char * rt)511 static int parse_reg (Register *r, int cl, char *rt)
512 {
513 r->regno = cl | (rt[1] - '0');
514 return REG;
515 }
516
parse_halfreg(Register * r,int cl,char * rt)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
set_start_state(void)544 set_start_state (void)
545 {
546 BEGIN KEYWORD;
547 }
548
549
550 #ifndef yywrap
551 int
yywrap()552 yywrap ()
553 {
554 return 1;
555 }
556 #endif
557