Commit | Line | Data |
---|---|---|
f70ab843 RH |
1 | /* |
2 | * Copyright (c) 1982 Regents of the University of California | |
3 | */ | |
4 | #ifndef lint | |
12044a7d | 5 | static char sccsid[] = "@(#)asexpr.c 4.5 %G%"; |
f70ab843 RH |
6 | |
7 | #endif not lint | |
1a42d599 | 8 | #include <stdio.h> |
1a42d599 | 9 | #include "as.h" |
f70ab843 | 10 | #include "asscan.h" |
1a42d599 BJ |
11 | #include "asexpr.h" |
12 | ||
13 | /* | |
14 | * Tables for combination of operands. | |
15 | */ | |
16 | #define XTXRN 5<<1 /* indexes last row/column when right shifted */ | |
17 | ||
18 | /* | |
19 | * table for + | |
20 | */ | |
21 | readonly char pltab[6][6] = { | |
22 | /* UND ABS TXT DAT BSS EXT */ | |
23 | ||
24 | /*UND*/ XUNDEF, XUNDEF, XUNDEF, XUNDEF, XUNDEF, XUNDEF, | |
25 | /*ABS*/ XUNDEF, XABS, XTEXT, XDATA, XBSS, XXTRN, | |
26 | /*TXT*/ XUNDEF, XTEXT, ERR, ERR, ERR, ERR, | |
27 | /*DAT*/ XUNDEF, XDATA, ERR, ERR, ERR, ERR, | |
28 | /*BSS*/ XUNDEF, XBSS, ERR, ERR, ERR, ERR, | |
29 | /*EXT*/ XUNDEF, XXTRN, ERR, ERR, ERR, ERR, | |
30 | }; | |
31 | ||
32 | /* | |
33 | * table for - | |
34 | */ | |
35 | readonly char mintab[6][6] = { | |
36 | /* UND ABS TXT DAT BSS EXT */ | |
37 | ||
38 | /*UND*/ XUNDEF, XUNDEF, XUNDEF, XUNDEF, XUNDEF, XUNDEF, | |
39 | /*ABS*/ XUNDEF, XABS, ERR, ERR, ERR, ERR, | |
40 | /*TXT*/ XUNDEF, XTEXT, XABS, ERR, ERR, ERR, | |
41 | /*DAT*/ XUNDEF, XDATA, ERR, XABS, ERR, ERR, | |
42 | /*BSS*/ XUNDEF, XBSS, ERR, ERR, XABS, ERR, | |
43 | /*EXT*/ XUNDEF, XXTRN, ERR, ERR, ERR, ERR, | |
44 | }; | |
45 | ||
46 | /* | |
47 | * table for other operators | |
48 | */ | |
49 | readonly char othtab[6][6] = { | |
50 | /* UND ABS TXT DAT BSS EXT */ | |
51 | ||
52 | /*UND*/ XUNDEF, XUNDEF, XUNDEF, XUNDEF, XUNDEF, XUNDEF, | |
53 | /*ABS*/ XUNDEF, XABS, ERR, ERR, ERR, ERR, | |
54 | /*TXT*/ XUNDEF, ERR, ERR, ERR, ERR, ERR, | |
55 | /*DAT*/ XUNDEF, ERR, ERR, ERR, ERR, ERR, | |
56 | /*BSS*/ XUNDEF, ERR, ERR, ERR, ERR, ERR, | |
57 | /*EXT*/ XUNDEF, ERR, ERR, ERR, ERR, ERR, | |
58 | }; | |
59 | ||
f70ab843 RH |
60 | struct exp *combine(op, exp1, exp2) |
61 | reg struct exp *exp1, *exp2; | |
1a42d599 | 62 | { |
f70ab843 RH |
63 | reg e1_type, e2_type; |
64 | reg back_type; | |
65 | char *btype = "The assembler can only do arithmetic on 1,2, or 4 byte integers"; | |
1a42d599 BJ |
66 | |
67 | lastnam=0; /* kludge for jxxx instructions */ | |
68 | ||
451260e7 RH |
69 | e1_type = exp1->e_xtype&XTYPE; |
70 | e2_type = exp2->e_xtype&XTYPE; | |
1a42d599 | 71 | |
451260e7 | 72 | if (exp1->e_xtype==XXTRN+XUNDEF) |
1a42d599 | 73 | e1_type = XTXRN; |
451260e7 | 74 | if (exp2->e_xtype==XXTRN+XUNDEF) |
1a42d599 BJ |
75 | e2_type = XTXRN; |
76 | if (passno==1) | |
451260e7 | 77 | if (exp1->e_xloc!=exp2->e_xloc && e1_type==e2_type) |
1a42d599 BJ |
78 | e1_type = e2_type = XTXRN; /* error on != loc ctrs */ |
79 | e1_type >>= 1; /*dispose of the external (XXTRN) bit*/ | |
80 | e2_type >>= 1; | |
81 | ||
f70ab843 RH |
82 | switch(exp1->e_number.num_tag){ |
83 | case TYPB: | |
84 | case TYPW: | |
85 | case TYPL: | |
86 | break; | |
87 | default: | |
88 | yyerror(btype); | |
89 | return(exp1); | |
90 | } | |
91 | switch(exp2->e_number.num_tag){ | |
92 | case TYPB: | |
93 | case TYPW: | |
94 | case TYPL: | |
95 | break; | |
96 | default: | |
97 | yyerror(btype); | |
98 | return(exp1); | |
99 | } | |
100 | switch (op){ | |
1a42d599 | 101 | case PLUS: |
451260e7 RH |
102 | exp1->e_xvalue += exp2->e_xvalue; |
103 | back_type = pltab[e1_type][e2_type]; | |
1a42d599 BJ |
104 | break; |
105 | case MINUS: | |
451260e7 RH |
106 | exp1->e_xvalue -= exp2->e_xvalue; |
107 | back_type = mintab[e1_type][e2_type]; | |
1a42d599 BJ |
108 | break; |
109 | case IOR: | |
451260e7 | 110 | exp1->e_xvalue |= exp2->e_xvalue; |
1a42d599 BJ |
111 | goto comm; |
112 | case XOR: | |
451260e7 | 113 | exp1->e_xvalue ^= exp2->e_xvalue; |
1a42d599 BJ |
114 | goto comm; |
115 | case AND: | |
451260e7 | 116 | exp1->e_xvalue &= exp2->e_xvalue; |
1a42d599 BJ |
117 | goto comm; |
118 | case ORNOT: | |
451260e7 | 119 | exp1->e_xvalue |= ~exp2->e_xvalue; |
1a42d599 BJ |
120 | goto comm; |
121 | case LSH: | |
451260e7 | 122 | exp1->e_xvalue <<= exp2->e_xvalue; |
1a42d599 BJ |
123 | goto comm; |
124 | case RSH: | |
451260e7 | 125 | exp1->e_xvalue >>= exp2->e_xvalue; |
1a42d599 BJ |
126 | goto comm; |
127 | case TILDE: | |
451260e7 | 128 | exp1->e_xvalue |= ~ exp2->e_xvalue; |
1a42d599 BJ |
129 | goto comm; |
130 | case MUL: | |
451260e7 | 131 | exp1->e_xvalue *= exp2->e_xvalue; |
1a42d599 BJ |
132 | goto comm; |
133 | case DIV: | |
451260e7 | 134 | if (exp2->e_xvalue == 0) |
1a42d599 BJ |
135 | yyerror("Divide check"); |
136 | else | |
451260e7 | 137 | exp1->e_xvalue /= exp2->e_xvalue; |
1a42d599 BJ |
138 | goto comm; |
139 | case REGOP: | |
451260e7 | 140 | if (exp2->e_xvalue == 0) |
1a42d599 BJ |
141 | yyerror("Divide check (modulo)"); |
142 | else | |
451260e7 | 143 | exp1->e_xvalue %= exp2->e_xvalue; |
1a42d599 BJ |
144 | goto comm; |
145 | ||
146 | comm: | |
451260e7 | 147 | back_type = othtab[e1_type][e2_type]; |
1a42d599 BJ |
148 | break; |
149 | default: | |
150 | yyerror("Internal error: unknown operator"); | |
151 | } | |
152 | ||
153 | if (e2_type==(XTXRN>>1)) | |
451260e7 RH |
154 | exp1->e_xname = exp2->e_xname; |
155 | exp1->e_xtype = back_type | ( | |
156 | (exp1->e_xtype|exp2->e_xtype) & (XFORW|XXTRN) ); | |
157 | if (back_type==ERR) | |
1a42d599 BJ |
158 | yyerror("Relocation error"); |
159 | return(exp1); | |
160 | } | |
161 | ||
162 | buildtokensets() | |
163 | { | |
164 | #define clobber(val, set) tokensets[(val)] |= (set) | |
165 | ||
166 | clobber(SEMI, LINSTBEGIN); | |
167 | clobber(NL, LINSTBEGIN); | |
168 | clobber(INT, LINSTBEGIN); | |
169 | ||
170 | clobber(NAME, YUKKYEXPRBEG + LINSTBEGIN); | |
171 | clobber(INSTn, YUKKYEXPRBEG); | |
172 | clobber(INST0, YUKKYEXPRBEG); | |
173 | clobber(REG, YUKKYEXPRBEG); | |
174 | clobber(BFINT, YUKKYEXPRBEG); | |
175 | ||
176 | clobber(INT, SAFEEXPRBEG); | |
f70ab843 | 177 | clobber(BIGNUM, SAFEEXPRBEG); |
1a42d599 BJ |
178 | |
179 | clobber(PLUS, ADDOPS); | |
180 | clobber(MINUS, ADDOPS + EBEGOPS); | |
181 | ||
182 | clobber(LP, EBEGOPS); | |
183 | ||
184 | clobber(IOR, BOOLOPS); | |
185 | clobber(XOR, BOOLOPS); | |
186 | clobber(AND, BOOLOPS); | |
187 | clobber(ORNOT, BOOLOPS); | |
188 | ||
189 | clobber(TILDE, MULOPS + EBEGOPS); | |
190 | clobber(LSH, MULOPS); | |
191 | clobber(RSH, MULOPS); | |
192 | clobber(MUL, MULOPS); | |
193 | clobber(DIV, MULOPS); | |
194 | clobber(REGOP, MULOPS); /* % */ | |
195 | ||
196 | } | |
197 | ||
198 | /* | |
199 | * We keep the current token class in this global variable, so | |
200 | * the recursive descent expression analyzers can talk amongst | |
201 | * themselves, and so that we may use the macros shift and shift over | |
202 | */ | |
203 | ||
204 | extern int yylval; /*the value of the lexical value*/ | |
205 | extern struct exp *xp; /*the next free expression slot*/ | |
206 | ||
f70ab843 RH |
207 | static inttoktype val; |
208 | ||
209 | /* | |
210 | * return the value the read head is sitting on | |
211 | */ | |
212 | inttoktype exprparse(inval, backexpr) | |
213 | inttoktype inval; | |
1a42d599 BJ |
214 | struct exp **backexpr; |
215 | { | |
f70ab843 RH |
216 | reg struct exp *lexpr; |
217 | inttoktype op; | |
1a42d599 BJ |
218 | |
219 | val = inval; | |
220 | lexpr = boolterm(); | |
221 | while (INTOKSET(val, ADDOPS)){ | |
222 | op = val; | |
223 | shift; | |
224 | lexpr = combine(op, lexpr, boolterm()); | |
225 | } | |
226 | *backexpr = lexpr; | |
227 | return(val); | |
228 | } | |
229 | ||
230 | struct exp *boolterm() | |
231 | { | |
f70ab843 RH |
232 | reg struct exp *lexpr; |
233 | inttoktype op; | |
1a42d599 BJ |
234 | |
235 | lexpr = term(); | |
236 | while(INTOKSET(val, BOOLOPS)){ | |
237 | op = val; | |
238 | shift; | |
239 | lexpr = combine(op, lexpr, term()); | |
240 | } | |
241 | return(lexpr); | |
242 | } | |
243 | ||
244 | struct exp *term() | |
245 | { | |
f70ab843 RH |
246 | reg struct exp *lexpr; |
247 | inttoktype op; | |
1a42d599 BJ |
248 | |
249 | lexpr = factor(); | |
250 | while(INTOKSET(val, MULOPS)){ | |
251 | op = val; | |
252 | shift; | |
253 | lexpr = combine(op, lexpr, factor()); | |
254 | } | |
255 | return(lexpr); | |
256 | } | |
257 | ||
258 | struct exp *factor() | |
259 | { | |
260 | struct exp *lexpr; | |
f70ab843 | 261 | inttoktype op; |
1a42d599 BJ |
262 | extern int droppedLP; /*called exprparse after consuming an LP*/ |
263 | ||
264 | if (val == LP || droppedLP){ | |
265 | if (droppedLP) | |
266 | droppedLP = 0; | |
267 | else | |
268 | shift; /*the LP*/ | |
269 | val = exprparse(val, &lexpr); | |
270 | if (val != RP) | |
271 | yyerror("right parenthesis expected"); | |
272 | else | |
273 | shift; | |
274 | } else | |
275 | if (INTOKSET(val, YUKKYEXPRBEG)){ | |
276 | lexpr = yukkyexpr(val, yylval); | |
277 | shift; | |
278 | } | |
279 | else if (INTOKSET(val, SAFEEXPRBEG)){ | |
280 | lexpr = (struct exp *)yylval; | |
281 | shift; | |
282 | } | |
283 | else if ( (val == TILDE) || (val == MINUS) ){ | |
284 | op = val; | |
285 | shift; | |
286 | lexpr = xp++; | |
451260e7 | 287 | lexpr->e_xtype = XABS; |
f70ab843 RH |
288 | lexpr->e_number = Znumber; |
289 | lexpr->e_number.num_tag = TYPL; | |
1a42d599 | 290 | lexpr = combine(op, lexpr, factor()); |
f70ab843 | 291 | } else { |
1a42d599 BJ |
292 | yyerror("Bad expression syntax"); |
293 | lexpr = xp++; | |
451260e7 | 294 | lexpr->e_xtype = XABS; |
f70ab843 RH |
295 | lexpr->e_number = Znumber; |
296 | lexpr->e_number.num_tag = TYPL; | |
1a42d599 BJ |
297 | } |
298 | return(lexpr); | |
299 | } | |
300 | ||
301 | struct exp *yukkyexpr(val, np) | |
302 | int val; | |
f70ab843 | 303 | reg np; |
1a42d599 | 304 | { |
f70ab843 RH |
305 | reg struct exp *locxp; |
306 | extern int exprisname; /*last factor is a name*/ | |
307 | int off = 0; | |
1a42d599 BJ |
308 | |
309 | exprisname = 0; | |
310 | locxp = xp++; | |
f70ab843 RH |
311 | locxp->e_number = Znumber; |
312 | locxp->e_number.num_tag = TYPL; | |
313 | ||
314 | switch(val){ | |
315 | case BFINT: | |
316 | yylval = ((struct exp *)np)->e_xvalue; | |
317 | if (yylval < 0) { | |
318 | yylval = -yylval; | |
319 | yylval--; | |
320 | off = -1; | |
321 | if (lgensym[yylval] == 1) | |
322 | yyerror("Reference to undefined local label %db", yylval); | |
323 | } else { | |
324 | yylval--; | |
325 | genref[yylval] = 1; | |
1a42d599 | 326 | } |
f70ab843 RH |
327 | (void)sprintf(yytext, "L%d\001%d", yylval, lgensym[yylval] + off); |
328 | yylval = np = (int)*lookup(passno == 1); | |
329 | lastnam = (struct symtab *)np; | |
330 | /* FALLTHROUGH */ | |
331 | case NAME: | |
1a42d599 | 332 | exprisname++; |
451260e7 RH |
333 | locxp->e_xtype = ((struct symtab *)np)->s_type; |
334 | if (( ((struct symtab *)np)->s_type&XTYPE)==XUNDEF) { /*forward*/ | |
335 | locxp->e_xname = (struct symtab *)np; | |
336 | locxp->e_xvalue = 0; | |
1a42d599 | 337 | if (passno==1) |
451260e7 | 338 | ((struct symtab *)np)->s_type |= XFORW; |
1a42d599 | 339 | } else { /*otherwise, just get the value*/ |
451260e7 RH |
340 | locxp->e_xvalue = ((struct symtab *)np)->s_value; |
341 | locxp->e_xname = NULL; | |
1a42d599 | 342 | } |
f70ab843 RH |
343 | break; |
344 | default: | |
345 | yyerror("Internal Error in yukkyexpr"); | |
346 | /* FALLTHROUGH */ | |
347 | ||
348 | case INSTn: | |
349 | case INST0: | |
350 | case REG: | |
451260e7 RH |
351 | locxp->e_xtype = XABS; |
352 | locxp->e_xvalue = ( (int)np) & 0xFF; | |
353 | locxp->e_xloc = 0; | |
354 | locxp->e_xname = NULL; | |
f70ab843 | 355 | break; |
1a42d599 BJ |
356 | } |
357 | ||
358 | return(locxp); | |
359 | } | |
360 | ||
310f8c15 RH |
361 | /* |
362 | * Print definitions for token kinds | |
363 | */ | |
364 | static char pdirect[] = "directive"; | |
365 | static char pinstr[] = "instruction"; | |
366 | static char phunk[] = "lexeme"; | |
367 | static char psmall[] = "small symbol"; | |
368 | static char pcntrl[] = "control token"; | |
369 | ||
370 | #define DIRECT pdirect | |
371 | #define INSTR pinstr | |
372 | #define HUNK phunk | |
373 | #define SMALL psmall | |
374 | #define CNTRL pcntrl | |
1a42d599 | 375 | |
1a42d599 BJ |
376 | struct Tok_Desc{ |
377 | int tok_which; | |
310f8c15 | 378 | char *tok_kind; |
1a42d599 | 379 | char *tok_name; |
310f8c15 RH |
380 | }; |
381 | struct Tok_Desc *tok_name[LASTTOKEN - FIRSTTOKEN + 1]; | |
382 | ||
383 | struct Tok_Desc tok_desc[] = { | |
384 | FIRSTTOKEN, DIRECT, "first token", | |
385 | ||
386 | IBYTE, DIRECT, ".byte", | |
387 | IWORD, DIRECT, ".word", | |
388 | IINT, DIRECT, ".int", | |
389 | ILONG, DIRECT, ".long", | |
390 | IQUAD, DIRECT, ".quad", | |
391 | IOCTA, DIRECT, ".octa", | |
392 | IFFLOAT, DIRECT, ".ffloat", | |
393 | IDFLOAT, DIRECT, ".dfloat", | |
394 | IGFLOAT, DIRECT, ".gfloat", | |
395 | IHFLOAT, DIRECT, ".hfloat", | |
396 | IASCII, DIRECT, ".ascii", | |
397 | IASCIZ, DIRECT, ".asciz", | |
398 | IFILL, DIRECT, ".fill", | |
399 | ISPACE, DIRECT, ".space", | |
400 | ||
401 | IDATA, DIRECT, ".data", | |
402 | ITEXT, DIRECT, ".text", | |
403 | IGLOBAL, DIRECT, ".global", | |
404 | IALIGN, DIRECT, ".align", | |
405 | ||
406 | ISET, DIRECT, ".set", | |
407 | ICOMM, DIRECT, ".comm", | |
408 | ILCOMM, DIRECT, ".lcomm", | |
409 | IORG, DIRECT, ".org", | |
410 | ILSYM, DIRECT, ".lsym", | |
411 | ||
412 | ISTAB, DIRECT, ".stab", | |
413 | ISTABSTR, DIRECT, ".stabstr", | |
414 | ISTABNONE, DIRECT, ".stabnone", | |
415 | ISTABDOT, DIRECT, ".stabdot", | |
416 | ||
417 | IFILE, DIRECT, ".file", | |
418 | ILINENO, DIRECT, ".lineno", | |
419 | IABORT, DIRECT, ".abort", | |
420 | ||
421 | IJXXX, INSTR, "jump pseudo", | |
422 | INST0, INSTR, "0 argument inst", | |
423 | INSTn, INSTR, "n argument inst", | |
424 | ||
425 | PARSEEOF, CNTRL, "parse end of file", | |
426 | ILINESKIP, CNTRL, "skip lines", | |
427 | VOID, CNTRL, "void", | |
428 | SKIP, CNTRL, "skip", | |
310f8c15 RH |
429 | NL, CNTRL, "new line", |
430 | SCANEOF, CNTRL, "scanner end of file", | |
431 | BADCHAR, CNTRL, "bad character", | |
432 | SH, CNTRL, "comment, #", | |
433 | ||
434 | INT, HUNK, "int", | |
435 | BFINT, HUNK, "local label", | |
436 | BIGNUM, HUNK, "big number", | |
437 | NAME, HUNK, "name", | |
438 | STRING, HUNK, "string", | |
439 | REG, HUNK, "register specifier", | |
440 | ||
441 | SIZESPEC, SMALL, "size specifier, [BWLbwl]", | |
442 | SIZEQUOTE, SMALL, "sizequote, [^']", | |
443 | LITOP, SMALL, "litop", | |
444 | ||
445 | MP, SMALL, "minus parenthesis, -(", | |
446 | REGOP, SMALL, "register operator, %", | |
447 | ||
448 | SP, SMALL, "space", | |
449 | ALPH, SMALL, "alphabetic character, [A-Za-z_]", | |
450 | DIG, SMALL, "digit character, [A-Fa-f0-9]", | |
451 | ||
452 | SQ, SMALL, "single quote, '", | |
453 | DQ, SMALL, "double quote, \"", | |
454 | ||
455 | LSH, SMALL, "arithmetic left shift, <", | |
456 | RSH, SMALL, "arithmetic right shift, >", | |
457 | XOR, SMALL, "exclusive or, ^", | |
458 | ||
459 | PLUS, SMALL, "plus, +", | |
460 | MINUS, SMALL, "minus, -", | |
461 | MUL, SMALL, "multiply, *", | |
462 | DIV, SMALL, "divide, /", | |
463 | SEMI, SMALL, "semi colon, ;", | |
464 | COLON, SMALL, "colon, :", | |
465 | IOR, SMALL, "inclusive or, |", | |
466 | AND, SMALL, "and, &", | |
467 | ||
468 | TILDE, SMALL, "one's complement, ~", | |
469 | ORNOT, SMALL, "ornot, !", | |
470 | CM, SMALL, "comma", | |
471 | ||
472 | LB, SMALL, "left bracket, [", | |
473 | RB, SMALL, "right bracket, ]", | |
474 | LP, SMALL, "left parenthesis, (", | |
475 | RP, SMALL, "right parentheis, )", | |
476 | ||
477 | LASTTOKEN, SMALL, "last token", | |
1a42d599 BJ |
478 | }; |
479 | /* | |
480 | * turn a token type into a string | |
481 | */ | |
1a42d599 BJ |
482 | char *tok_to_name(token) |
483 | { | |
f70ab843 | 484 | static int fixed = 0; |
310f8c15 RH |
485 | static char buf[64]; |
486 | static struct Tok_Desc NA = {0, (char *)0, "NOT ASSIGNED"}; | |
487 | int i; | |
488 | char *cp; | |
f70ab843 | 489 | |
1a42d599 | 490 | if (!fixed){ |
1a42d599 | 491 | for (i = FIRSTTOKEN; i <= LASTTOKEN; i++) |
310f8c15 RH |
492 | tok_name[i] = &NA; |
493 | for (i = 0; i <= sizeof(tok_desc)/sizeof(struct Tok_Desc); i++){ | |
494 | tok_name[tok_desc[i].tok_which] = &tok_desc[i]; | |
1a42d599 BJ |
495 | } |
496 | fixed = 1; | |
497 | } | |
310f8c15 RH |
498 | if (FIRSTTOKEN <= token && token <= LASTTOKEN){ |
499 | sprintf(buf, "%s %s", tok_name[token]->tok_kind, | |
500 | tok_name[token]->tok_name); | |
501 | return(buf); | |
502 | } else { | |
1a42d599 | 503 | panic("Unknown token number, %d\n", token); |
310f8c15 RH |
504 | /*NOTREACHED*/ |
505 | } | |
1a42d599 | 506 | } |