Commit | Line | Data |
---|---|---|
f2b49199 | 1 | #ifndef lint |
20018a56 | 2 | static char sccsid[] = "@(#)local2.c 1.15 (Berkeley) %G%"; |
f2b49199 SL |
3 | #endif |
4 | ||
ebdd0416 SL |
5 | # include "pass2.h" |
6 | # include <ctype.h> | |
895241c8 SL |
7 | |
8 | # define putstr(s) fputs((s), stdout) | |
73fe5b3f | 9 | # define ISCHAR(p) (p->in.type == UCHAR || p->in.type == CHAR) |
895241c8 | 10 | |
f2b49199 SL |
11 | # ifdef FORT |
12 | int ftlab1, ftlab2; | |
13 | # endif | |
14 | /* a lot of the machine dependent parts of the second pass */ | |
15 | ||
16 | # define BITMASK(n) ((1L<<n)-1) | |
17 | ||
18 | # ifndef ONEPASS | |
19 | where(c){ | |
20 | fprintf( stderr, "%s, line %d: ", filename, lineno ); | |
21 | } | |
22 | # endif | |
23 | ||
24 | lineid( l, fn ) char *fn; { | |
25 | /* identify line l and file fn */ | |
26 | printf( "# line %d, file %s\n", l, fn ); | |
27 | } | |
28 | ||
29 | int ent_mask; | |
30 | ||
31 | eobl2(){ | |
32 | register OFFSZ spoff; /* offset from stack pointer */ | |
33 | #ifndef FORT | |
34 | extern int ftlab1, ftlab2; | |
35 | #endif | |
36 | ||
37 | spoff = maxoff; | |
38 | spoff /= SZCHAR; | |
39 | SETOFF(spoff,4); | |
40 | #ifdef FORT | |
41 | #ifndef FLEXNAMES | |
42 | printf( " .set .F%d,%d\n", ftnno, spoff ); | |
43 | #else | |
44 | /* SHOULD BE L%d ... ftnno but must change pc/f77 */ | |
45 | printf( " .set LF%d,%d\n", ftnno, spoff ); | |
46 | #endif | |
47 | printf( " .set LWM%d,0x%x\n", ftnno, ent_mask&0x1ffc|0x1000); | |
48 | #else | |
49 | printf( " .set L%d,0x%x\n", ftnno, ent_mask&0x1ffc); | |
50 | printf( "L%d:\n", ftlab1); | |
51 | if( maxoff > AUTOINIT ) | |
52 | printf( " subl3 $%d,fp,sp\n", spoff); | |
53 | printf( " jbr L%d\n", ftlab2); | |
54 | #endif | |
55 | ent_mask = 0; | |
56 | maxargs = -1; | |
57 | } | |
58 | ||
59 | struct hoptab { int opmask; char * opstring; } ioptab[] = { | |
60 | ||
61 | PLUS, "add", | |
62 | MINUS, "sub", | |
63 | MUL, "mul", | |
64 | DIV, "div", | |
65 | MOD, "div", | |
66 | OR, "or", | |
67 | ER, "xor", | |
68 | AND, "and", | |
69 | -1, "" }; | |
70 | ||
71 | hopcode( f, o ){ | |
72 | /* output the appropriate string from the above table */ | |
73 | ||
74 | register struct hoptab *q; | |
75 | ||
76 | if(asgop(o)) | |
77 | o = NOASG o; | |
78 | for( q = ioptab; q->opmask>=0; ++q ){ | |
79 | if( q->opmask == o ){ | |
80 | if(f == 'E') | |
81 | printf( "e%s", q->opstring); | |
82 | else | |
83 | printf( "%s%c", q->opstring, tolower(f)); | |
84 | return; | |
85 | } | |
86 | } | |
87 | cerror( "no hoptab for %s", opst[o] ); | |
88 | } | |
89 | ||
90 | char * | |
91 | rnames[] = { /* keyed to register number tokens */ | |
92 | ||
93 | "r0", "r1", | |
94 | "r2", "r3", "r4", "r5", | |
95 | "r6", "r7", "r8", "r9", "r10", "r11", | |
96 | "r12", "fp", "sp", "pc", | |
97 | }; | |
98 | ||
99 | /* output register name and update entry mask */ | |
100 | char * | |
101 | rname(r) | |
102 | register int r; | |
103 | { | |
104 | ||
105 | ent_mask |= 1<<r; | |
106 | return(rnames[r]); | |
107 | } | |
108 | ||
109 | int rstatus[] = { | |
110 | SAREG|STAREG, SAREG|STAREG, | |
111 | SAREG|STAREG, SAREG|STAREG, SAREG|STAREG, SAREG|STAREG, | |
112 | SAREG, SAREG, SAREG, SAREG, SAREG, SAREG, | |
113 | SAREG, SAREG, SAREG, SAREG, | |
114 | }; | |
115 | ||
116 | tlen(p) NODE *p; | |
117 | { | |
118 | switch(p->in.type) { | |
119 | case CHAR: | |
120 | case UCHAR: | |
121 | return(1); | |
122 | ||
123 | case SHORT: | |
124 | case USHORT: | |
125 | return(2); | |
126 | ||
127 | case DOUBLE: | |
128 | return(8); | |
129 | ||
130 | default: | |
131 | return(4); | |
132 | } | |
133 | } | |
134 | ||
f1824a4b SL |
135 | anyfloat(p, q) |
136 | NODE *p, *q; | |
137 | { | |
138 | register TWORD tp, tq; | |
139 | ||
140 | tp = p->in.type; | |
141 | tq = q->in.type; | |
142 | return (tp == FLOAT || tp == DOUBLE || tq == FLOAT || tq == DOUBLE); | |
143 | } | |
144 | ||
f2b49199 SL |
145 | prtype(n) NODE *n; |
146 | { | |
147 | switch (n->in.type) | |
148 | { | |
149 | ||
150 | case DOUBLE: | |
895241c8 | 151 | putchar('d'); |
f2b49199 SL |
152 | return; |
153 | ||
154 | case FLOAT: | |
895241c8 | 155 | putchar('f'); |
f2b49199 SL |
156 | return; |
157 | ||
158 | case INT: | |
159 | case UNSIGNED: | |
895241c8 | 160 | putchar('l'); |
f2b49199 SL |
161 | return; |
162 | ||
163 | case SHORT: | |
164 | case USHORT: | |
895241c8 | 165 | putchar('w'); |
f2b49199 SL |
166 | return; |
167 | ||
168 | case CHAR: | |
169 | case UCHAR: | |
895241c8 | 170 | putchar('b'); |
f2b49199 SL |
171 | return; |
172 | ||
173 | default: | |
174 | if ( !ISPTR( n->in.type ) ) cerror("zzzcode- bad type"); | |
175 | else { | |
895241c8 | 176 | putchar('l'); |
f2b49199 SL |
177 | return; |
178 | } | |
179 | } | |
180 | } | |
181 | ||
182 | zzzcode( p, c ) register NODE *p; { | |
183 | register int m; | |
184 | int val; | |
185 | switch( c ){ | |
186 | ||
187 | case 'N': /* logical ops, turned into 0-1 */ | |
188 | /* use register given by register 1 */ | |
189 | cbgen( 0, m=getlab(), 'I' ); | |
190 | deflab( p->bn.label ); | |
191 | printf( " clrl %s\n", rname(getlr( p, '1' )->tn.rval) ); | |
192 | deflab( m ); | |
193 | return; | |
194 | ||
195 | case 'P': | |
196 | cbgen( p->in.op, p->bn.label, c ); | |
197 | return; | |
198 | ||
8acf7c89 | 199 | case 'G': /* i *= f; asgops with int lhs and float rhs */ |
f2b49199 | 200 | { |
8acf7c89 DS |
201 | register NODE *l, *r, *s; |
202 | int lt, rt; | |
f2b49199 | 203 | |
8acf7c89 DS |
204 | l = p->in.left; |
205 | r = p->in.right; | |
206 | s = talloc(); | |
207 | rt = r->in.type; | |
208 | lt = l->in.type; | |
209 | ||
210 | if (lt != INT && lt != UNSIGNED) { | |
211 | s->in.op = SCONV; | |
212 | s->in.left = l; | |
213 | s->in.type = ISUNSIGNED(lt) ? UNSIGNED : INT; | |
214 | zzzcode(s, 'U'); | |
215 | putstr("\n\t"); | |
216 | } | |
f2b49199 | 217 | |
8acf7c89 DS |
218 | if (ISUNSIGNED(lt)) { |
219 | s->in.op = SCONV; | |
220 | s->in.left = lt == UNSIGNED ? l : resc; | |
221 | s->in.type = rt; | |
222 | unsigned_to_float(s); | |
223 | } else { | |
224 | putstr("cvl"); | |
225 | prtype(r); | |
226 | putchar('\t'); | |
227 | adrput(lt == INT ? l : resc); | |
f2b49199 | 228 | } |
8acf7c89 DS |
229 | putstr("\n\t"); |
230 | ||
231 | hopcode(rt == FLOAT ? 'F' : 'D', p->in.op); | |
895241c8 | 232 | putchar('\t'); |
f2b49199 | 233 | adrput(r); |
8acf7c89 DS |
234 | |
235 | if (ISUNSIGNED(lt)) { | |
236 | putstr("\n\t"); | |
237 | s->in.op = SCONV; | |
238 | s->in.left = r; /* we need only the type */ | |
239 | s->in.type = UNSIGNED; | |
240 | float_to_unsigned(s); | |
241 | } else { | |
242 | putstr("\n\tcv"); | |
243 | prtype(r); | |
244 | putstr("l\t"); | |
245 | if (lt == INT) | |
246 | adrput(l); | |
247 | else | |
248 | adrput(resc); | |
249 | } | |
250 | if (lt != INT) { | |
251 | putstr("\n\t"); | |
252 | s->in.op = ASSIGN; | |
253 | s->in.left = l; | |
254 | s->in.right = resc; | |
255 | s->in.type = lt; | |
256 | zzzcode(s, 'U'); | |
257 | } | |
258 | ||
259 | s->in.op = FREE; | |
f2b49199 SL |
260 | return; |
261 | } | |
262 | ||
263 | case 'B': /* get oreg value in temp register for shift */ | |
264 | { | |
265 | register NODE *r; | |
266 | if (xdebug) eprint(p, 0, &val, &val); | |
267 | r = p->in.right; | |
268 | if( tlen(r) == sizeof(int) && r->in.type != FLOAT ) | |
895241c8 | 269 | putstr("movl"); |
f2b49199 | 270 | else { |
895241c8 | 271 | putstr(ISUNSIGNED(r->in.type) ? "movz" : "cvt"); |
f2b49199 | 272 | prtype(r); |
895241c8 | 273 | putchar('l'); |
f2b49199 SL |
274 | } |
275 | return; | |
276 | } | |
277 | ||
278 | case 'C': /* num bytes pushed on arg stack */ | |
279 | { | |
280 | extern int gc_numbytes; | |
281 | extern int xdebug; | |
282 | ||
283 | if (xdebug) printf("->%d<-",gc_numbytes); | |
284 | ||
285 | printf("call%c $%d", | |
286 | (p->in.left->in.op==ICON && gc_numbytes<60)?'f':'s', | |
287 | gc_numbytes+4); | |
288 | /* dont change to double (here's the only place to catch it) */ | |
289 | if(p->in.type == FLOAT) | |
290 | rtyflg = 1; | |
291 | return; | |
292 | } | |
293 | ||
294 | case 'D': /* INCR and DECR */ | |
8acf7c89 | 295 | zzzcode(p->in.left, 'U'); |
895241c8 | 296 | putstr("\n "); |
f2b49199 SL |
297 | |
298 | case 'E': /* INCR and DECR, FOREFF */ | |
299 | if (p->in.right->tn.lval == 1) | |
300 | { | |
895241c8 | 301 | putstr(p->in.op == INCR ? "inc" : "dec"); |
f2b49199 | 302 | prtype(p->in.left); |
895241c8 | 303 | putchar('\t'); |
f2b49199 SL |
304 | adrput(p->in.left); |
305 | return; | |
306 | } | |
895241c8 | 307 | putstr(p->in.op == INCR ? "add" : "sub"); |
f2b49199 | 308 | prtype(p->in.left); |
895241c8 | 309 | putstr("2 "); |
f2b49199 | 310 | adrput(p->in.right); |
895241c8 | 311 | putchar(','); |
f2b49199 SL |
312 | adrput(p->in.left); |
313 | return; | |
314 | ||
315 | case 'F': /* masked constant for fields */ | |
7412b41b | 316 | printf(ACONFMT, (p->in.right->tn.lval&((1<<fldsz)-1))<<fldshf); |
f2b49199 SL |
317 | return; |
318 | ||
319 | case 'H': /* opcode for shift */ | |
320 | if(p->in.op == LS || p->in.op == ASG LS) | |
895241c8 | 321 | putstr("shll"); |
f2b49199 | 322 | else if(ISUNSIGNED(p->in.left->in.type)) |
895241c8 | 323 | putstr("shrl"); |
f2b49199 | 324 | else |
895241c8 | 325 | putstr("shar"); |
f2b49199 SL |
326 | return; |
327 | ||
328 | case 'L': /* type of left operand */ | |
329 | case 'R': /* type of right operand */ | |
330 | { | |
331 | register NODE *n; | |
332 | extern int xdebug; | |
333 | ||
334 | n = getlr ( p, c); | |
335 | if (xdebug) printf("->%d<-", n->in.type); | |
336 | ||
337 | prtype(n); | |
338 | return; | |
339 | } | |
340 | ||
f1824a4b | 341 | case 'M': { /* initiate ediv for mod and unsigned div */ |
f2b49199 SL |
342 | register char *r; |
343 | m = getlr(p, '1')->tn.rval; | |
344 | r = rname(m); | |
345 | printf("\tclrl\t%s\n\tmovl\t", r); | |
346 | adrput(p->in.left); | |
347 | printf(",%s\n", rname(m+1)); | |
348 | if(!ISUNSIGNED(p->in.type)) { /* should be MOD */ | |
349 | m = getlab(); | |
350 | printf("\tjgeq\tL%d\n\tmnegl\t$1,%s\n", m, r); | |
351 | deflab(m); | |
352 | } | |
f2b49199 | 353 | return; |
f1824a4b | 354 | } |
f2b49199 | 355 | |
f1824a4b SL |
356 | case 'T': { /* rounded structure length for arguments */ |
357 | int size = p->stn.stsize; | |
f2b49199 SL |
358 | SETOFF( size, 4); |
359 | printf("movab -%d(sp),sp", size); | |
360 | return; | |
f1824a4b | 361 | } |
f2b49199 SL |
362 | |
363 | case 'S': /* structure assignment */ | |
1d43595d SL |
364 | stasg(p); |
365 | break; | |
f2b49199 | 366 | |
73fe5b3f SL |
367 | case 'X': /* multiplication for short and char */ |
368 | if (ISUNSIGNED(p->in.left->in.type)) | |
369 | printf("\tmovz"); | |
370 | else | |
371 | printf("\tcvt"); | |
372 | zzzcode(p, 'L'); | |
373 | printf("l\t"); | |
374 | adrput(p->in.left); | |
375 | printf(","); | |
376 | adrput(&resc[0]); | |
377 | printf("\n"); | |
378 | if (ISUNSIGNED(p->in.right->in.type)) | |
379 | printf("\tmovz"); | |
380 | else | |
381 | printf("\tcvt"); | |
382 | zzzcode(p, 'R'); | |
383 | printf("l\t"); | |
384 | adrput(p->in.right); | |
385 | printf(","); | |
386 | adrput(&resc[1]); | |
387 | printf("\n"); | |
388 | return; | |
389 | ||
f1824a4b SL |
390 | case 'U': /* SCONV */ |
391 | case 'V': /* SCONV with FORCC */ | |
392 | sconv(p, c == 'V'); | |
393 | break; | |
394 | ||
8acf7c89 DS |
395 | case 'W': /* SCONV float/double => unsigned */ |
396 | putstr("ld"); | |
397 | prtype(p->in.left); | |
398 | putchar('\t'); | |
399 | adrput(p->in.left); | |
400 | putstr("\n\t"); | |
401 | float_to_unsigned(p); | |
402 | break; | |
403 | ||
404 | case 'Y': /* SCONV unsigned => float/double */ | |
405 | unsigned_to_float(p); /* stores into accumulator */ | |
406 | putstr("\n\tst"); | |
407 | prtype(p); | |
408 | putchar('\t'); | |
409 | adrput(resc); | |
410 | break; | |
411 | ||
f1824a4b SL |
412 | case 'Z': |
413 | p = p->in.right; | |
414 | switch (p->in.type) { | |
415 | case SHORT: { | |
416 | short w = p->tn.lval; | |
417 | p->tn.lval = w; | |
418 | break; | |
419 | } | |
420 | case CHAR: { | |
421 | char c = p->tn.lval; | |
422 | p->tn.lval = c; | |
423 | break; | |
424 | } | |
425 | } | |
426 | printf("$%d", p->tn.lval); | |
427 | break; | |
428 | ||
1d43595d SL |
429 | default: |
430 | cerror( "illegal zzzcode" ); | |
1d43595d | 431 | } |
f1824a4b | 432 | } |
f2b49199 | 433 | |
1d43595d | 434 | #define MOVB(dst, src, off) { \ |
895241c8 | 435 | putstr("\tmovb\t"); upput(src, off); putchar(','); \ |
1d43595d SL |
436 | upput(dst, off); putchar('\n'); \ |
437 | } | |
438 | #define MOVW(dst, src, off) { \ | |
895241c8 | 439 | putstr("\tmovw\t"); upput(src, off); putchar(','); \ |
1d43595d SL |
440 | upput(dst, off); putchar('\n'); \ |
441 | } | |
442 | #define MOVL(dst, src, off) { \ | |
895241c8 | 443 | putstr("\tmovl\t"); upput(src, off); putchar(','); \ |
1d43595d SL |
444 | upput(dst, off); putchar('\n'); \ |
445 | } | |
446 | /* | |
447 | * Generate code for a structure assignment. | |
448 | */ | |
449 | stasg(p) | |
450 | register NODE *p; | |
451 | { | |
452 | register NODE *l, *r; | |
453 | register int size; | |
454 | ||
455 | switch (p->in.op) { | |
456 | case STASG: /* regular assignment */ | |
457 | l = p->in.left; | |
458 | r = p->in.right; | |
459 | break; | |
460 | case STARG: /* place arg on the stack */ | |
461 | l = getlr(p, '3'); | |
462 | r = p->in.left; | |
463 | break; | |
464 | default: | |
465 | cerror("STASG bad"); | |
466 | /*NOTREACHED*/ | |
467 | } | |
468 | /* | |
469 | * Pun source for use in code generation. | |
470 | */ | |
471 | switch (r->in.op) { | |
472 | case ICON: | |
473 | r->in.op = NAME; | |
474 | break; | |
475 | case REG: | |
476 | r->in.op = OREG; | |
477 | break; | |
478 | default: | |
479 | cerror( "STASG-r" ); | |
480 | /*NOTREACHED*/ | |
481 | } | |
482 | size = p->stn.stsize; | |
483 | if (size <= 0 || size > 65535) | |
484 | cerror("structure size out of range"); | |
485 | /* | |
486 | * Generate optimized code based on structure size | |
487 | * and alignment properties.... | |
488 | */ | |
489 | switch (size) { | |
490 | ||
491 | case 1: | |
895241c8 | 492 | putstr("\tmovb\t"); |
1d43595d SL |
493 | optimized: |
494 | adrput(r); | |
895241c8 | 495 | putchar(','); |
1d43595d | 496 | adrput(l); |
895241c8 | 497 | putchar('\n'); |
1d43595d SL |
498 | break; |
499 | ||
500 | case 2: | |
501 | if (p->stn.stalign != 2) { | |
502 | MOVB(l, r, SZCHAR); | |
895241c8 | 503 | putstr("\tmovb\t"); |
1d43595d | 504 | } else |
895241c8 | 505 | putstr("\tmovw\t"); |
1d43595d SL |
506 | goto optimized; |
507 | ||
508 | case 4: | |
509 | if (p->stn.stalign != 4) { | |
510 | if (p->stn.stalign != 2) { | |
511 | MOVB(l, r, 3*SZCHAR); | |
512 | MOVB(l, r, 2*SZCHAR); | |
513 | MOVB(l, r, 1*SZCHAR); | |
895241c8 | 514 | putstr("\tmovb\t"); |
1d43595d SL |
515 | } else { |
516 | MOVW(l, r, SZSHORT); | |
895241c8 | 517 | putstr("\tmovw\t"); |
f2b49199 | 518 | } |
1d43595d | 519 | } else |
895241c8 | 520 | putstr("\tmovl\t"); |
1d43595d SL |
521 | goto optimized; |
522 | ||
523 | case 6: | |
524 | if (p->stn.stalign != 2) | |
525 | goto movblk; | |
526 | MOVW(l, r, 2*SZSHORT); | |
527 | MOVW(l, r, 1*SZSHORT); | |
895241c8 | 528 | putstr("\tmovw\t"); |
1d43595d SL |
529 | goto optimized; |
530 | ||
531 | case 8: | |
532 | if (p->stn.stalign == 4) { | |
533 | MOVL(l, r, SZLONG); | |
895241c8 | 534 | putstr("\tmovl\t"); |
1d43595d SL |
535 | goto optimized; |
536 | } | |
537 | /* fall thru...*/ | |
f2b49199 | 538 | |
1d43595d SL |
539 | default: |
540 | movblk: | |
541 | /* | |
542 | * Can we ever get a register conflict with R1 here? | |
543 | */ | |
895241c8 | 544 | putstr("\tmovab\t"); |
1d43595d | 545 | adrput(l); |
895241c8 | 546 | putstr(",r1\n\tmovab\t"); |
1d43595d SL |
547 | adrput(r); |
548 | printf(",r0\n\tmovl\t$%d,r2\n\tmovblk\n", size); | |
549 | rname(R2); | |
f2b49199 | 550 | break; |
1d43595d SL |
551 | } |
552 | /* | |
553 | * Reverse above pun for reclaim. | |
554 | */ | |
555 | if (r->in.op == NAME) | |
556 | r->in.op = ICON; | |
557 | else if (r->in.op == OREG) | |
558 | r->in.op = REG; | |
559 | } | |
f2b49199 | 560 | |
1d43595d SL |
561 | /* |
562 | * Output the address of the second item in the | |
563 | * pair pointed to by p. | |
564 | */ | |
565 | upput(p, size) | |
566 | register NODE *p; | |
567 | { | |
568 | CONSZ save; | |
569 | ||
570 | if (p->in.op == FLD) | |
571 | p = p->in.left; | |
572 | switch (p->in.op) { | |
573 | ||
574 | case NAME: | |
575 | case OREG: | |
576 | save = p->tn.lval; | |
577 | p->tn.lval += size/SZCHAR; | |
578 | adrput(p); | |
579 | p->tn.lval = save; | |
580 | break; | |
581 | ||
582 | case REG: | |
583 | if (size == SZLONG) { | |
895241c8 | 584 | putstr(rname(p->tn.rval+1)); |
1d43595d | 585 | break; |
f2b49199 | 586 | } |
1d43595d SL |
587 | /* fall thru... */ |
588 | ||
589 | default: | |
590 | cerror("illegal upper address op %s size %d", | |
591 | opst[p->tn.op], size); | |
592 | /*NOTREACHED*/ | |
f2b49199 | 593 | } |
1d43595d | 594 | } |
f2b49199 | 595 | |
8acf7c89 DS |
596 | /* |
597 | * Convert a float or double in the accumulator into an unsigned int. | |
598 | * Unlike the vax, the tahoe stores 0 into the destination | |
599 | * on a conversion of > 2 ** 31, so we compensate. | |
600 | */ | |
601 | float_to_unsigned(p) | |
602 | NODE *p; | |
603 | { | |
604 | register NODE *l = p->in.left; | |
605 | int label1 = getlab(); | |
606 | int label2 = getlab(); | |
607 | int label3 = getlab(); | |
608 | ||
609 | printf(".data\n\t.align\t2\nL%d:\n\t.long\t0x50000000", label1); | |
610 | if (l->in.type == DOUBLE) | |
611 | putstr(", 0x00000000"); | |
612 | putstr(" # .double 2147483648\n\t.text\n\tcmp"); | |
613 | prtype(l); | |
614 | printf("\tL%d\n\tjlss\tL%d\n\tsub", label1, label2); | |
615 | prtype(l); | |
616 | printf("\tL%d\n\tcv", label1); | |
617 | prtype(l); | |
618 | putstr("l\t"); | |
619 | adrput(resc); | |
620 | putstr("\n\taddl2\t$-2147483648,"); | |
621 | adrput(resc); | |
622 | printf("\n\tjbr\tL%d\nL%d:\n\tcv", label3, label2); | |
623 | prtype(l); | |
624 | putstr("l\t"); | |
625 | adrput(resc); | |
626 | printf("\nL%d:", label3); | |
627 | } | |
628 | ||
629 | /* | |
630 | * Convert an unsigned int into a float or double, leaving the result | |
631 | * in the accumulator. | |
632 | */ | |
633 | unsigned_to_float(p) | |
634 | register NODE *p; | |
635 | { | |
636 | int label1 = getlab(); | |
637 | int label2 = getlab(); | |
638 | ||
639 | printf(".data\n\t.align\t2\nL%d:\n\t.long\t0x50800000", label2); | |
640 | if (p->in.type == DOUBLE) | |
641 | putstr(", 0x00000000"); | |
642 | putstr(" # .double 4294967296\n\t.text\n\tmovl\t"); | |
643 | adrput(p->in.left); | |
644 | putchar(','); | |
645 | adrput(resc); | |
646 | putstr("\n\tcvl"); | |
647 | prtype(p); | |
648 | putchar('\t'); | |
649 | adrput(resc); | |
650 | printf("\n\tjgeq\tL%d\n\taddd\tL%d\nL%d:", label1, label2, label1); | |
651 | } | |
652 | ||
26ab1ae0 DS |
653 | /* |
654 | * Prlen() is a cheap prtype()... | |
655 | */ | |
656 | static char convtab[SZINT/SZCHAR + 1] = { | |
657 | '?', 'b', 'w', '?', 'l' | |
658 | }; | |
659 | #define prlen(len) putchar(convtab[len]) | |
660 | ||
661 | ||
52b983f1 DS |
662 | /* |
663 | * Generate code for integral scalar conversions. | |
26ab1ae0 DS |
664 | * Some of this code is designed to work around a tahoe misfeature |
665 | * that causes sign- and zero- extension to be defeated in | |
666 | * certain circumstances. | |
667 | * Basically if the source operand of a CVT or MOVZ instruction is | |
668 | * shorter than the destination, and the source is a register | |
669 | * or an immediate constant, sign- and zero- extension are | |
670 | * ignored and the high bits of the source are copied. (Note | |
671 | * that zero-extension is not a problem for immediate | |
672 | * constants.) | |
52b983f1 DS |
673 | */ |
674 | sconv(p, forcc) | |
675 | NODE *p; | |
676 | int forcc; | |
677 | { | |
678 | register NODE *src, *dst; | |
679 | register NODE *tmp; | |
680 | register int srclen, dstlen; | |
681 | int srctype, dsttype; | |
682 | int val; | |
683 | ||
684 | if (p->in.op == ASSIGN) { | |
685 | src = getlr(p, 'R'); | |
686 | dst = getlr(p, 'L'); | |
687 | dstlen = tlen(dst); | |
688 | dsttype = dst->in.type; | |
689 | } else /* if (p->in.op == SCONV || optype(p->in.op) == LTYPE) */ { | |
690 | src = getlr(p, 'L'); | |
691 | dst = getlr(p, '1'); | |
692 | dstlen = tlen(p); | |
693 | dsttype = p->in.type; | |
694 | } | |
695 | ||
26ab1ae0 DS |
696 | if (src->in.op == REG) { |
697 | srclen = SZINT/SZCHAR; | |
698 | srctype = ISUNSIGNED(src->in.type) ? UNSIGNED : INT; | |
699 | } else { | |
700 | srclen = tlen(src); | |
701 | srctype = src->in.type; | |
702 | } | |
703 | ||
704 | if (src->in.op == ICON) { | |
705 | if (src->tn.lval == 0) { | |
706 | putstr("clr"); | |
707 | prtype(dst); | |
708 | putchar('\t'); | |
709 | adrput(dst); | |
710 | return; | |
711 | } | |
712 | if (dstlen < srclen) { | |
713 | switch (dsttype) { | |
714 | case CHAR: | |
715 | src->tn.lval = (char) src->tn.lval; | |
716 | break; | |
717 | case UCHAR: | |
718 | src->tn.lval = (unsigned char) src->tn.lval; | |
719 | break; | |
720 | case SHORT: | |
721 | src->tn.lval = (short) src->tn.lval; | |
722 | break; | |
723 | case USHORT: | |
724 | src->tn.lval = (unsigned short) src->tn.lval; | |
725 | break; | |
726 | } | |
727 | } | |
728 | if (dst->in.op == REG) { | |
729 | dsttype = INT; | |
730 | dstlen = SZINT/SZCHAR; | |
731 | } | |
732 | srctype = dsttype; | |
733 | srclen = dstlen; | |
734 | } | |
52b983f1 DS |
735 | |
736 | if (srclen < dstlen) { | |
737 | if (srctype == CHAR && dsttype == USHORT && dst->in.op == REG) { | |
738 | /* (unsigned short) c; => sign extend to 16 bits */ | |
c3446016 | 739 | putstr("cvtbl\t"); |
52b983f1 DS |
740 | adrput(src); |
741 | putstr(",-(sp)\n\tmovzwl\t2(sp),"); | |
742 | adrput(dst); | |
743 | putstr("\n\tmovab\t4(sp),sp"); | |
744 | if (forcc) { | |
745 | /* inverted test */ | |
746 | putstr("\n\tcmpl\t$0,"); | |
747 | adrput(dst); | |
748 | } | |
749 | return; | |
750 | } | |
751 | genconv(ISUNSIGNED(srctype), | |
752 | srclen, dst->in.op == REG ? SZINT/SZCHAR : dstlen, | |
753 | src, dst); | |
754 | return; | |
755 | } | |
756 | ||
757 | if (srclen > dstlen && dst->in.op == REG) { | |
26ab1ae0 | 758 | /* if dst is a register, the result must look like an int */ |
52b983f1 DS |
759 | if (src->in.op == REG) { |
760 | if (ISUNSIGNED(dsttype)) { | |
761 | val = (1 << dstlen * SZCHAR) - 1; | |
762 | if (src->tn.rval == dst->tn.rval) | |
763 | /* conversion in place */ | |
c3446016 | 764 | printf("andl2\t$%#x,", val); |
52b983f1 | 765 | else { |
c3446016 | 766 | printf("andl3\t$%#x,", val); |
52b983f1 DS |
767 | adrput(src); |
768 | putchar(','); | |
769 | } | |
770 | adrput(dst); | |
771 | return; | |
772 | } | |
26ab1ae0 DS |
773 | /* |
774 | * Sign extension in register can also be | |
775 | * accomplished by shifts, but unfortunately | |
776 | * shifts are extremely slow, due to the lack | |
777 | * of a barrel shifter. | |
778 | */ | |
779 | putstr("pushl\t"); | |
52b983f1 | 780 | adrput(src); |
26ab1ae0 DS |
781 | putstr("\n\tcvt"); |
782 | prlen(dstlen); | |
783 | printf("l\t%d(sp),", SZINT/SZCHAR - dstlen); | |
52b983f1 | 784 | adrput(dst); |
26ab1ae0 DS |
785 | putstr("\n\tmovab\t4(sp),sp"); |
786 | if (forcc) { | |
787 | /* inverted test */ | |
788 | putstr("\n\tcmpl\t$0,"); | |
789 | adrput(dst); | |
790 | } | |
52b983f1 DS |
791 | return; |
792 | } | |
793 | tmp = talloc(); | |
794 | if ((src->in.op == UNARY MUL && | |
795 | ((src->in.left->in.op == NAME || | |
796 | (src->in.left->in.op == ICON)))) || | |
797 | (src->in.op == OREG && !R2TEST(src->tn.rval))) { | |
798 | /* we can increment src's address & pun it */ | |
799 | *tmp = *src; | |
800 | tmp->tn.lval += srclen - dstlen; | |
801 | } else { | |
802 | /* we must store src's address */ | |
803 | *tmp = *dst; | |
26ab1ae0 DS |
804 | putstr("mova"); |
805 | prlen(srclen); | |
806 | putchar('\t'); | |
52b983f1 DS |
807 | adrput(src); |
808 | putchar(','); | |
809 | adrput(tmp); | |
c3446016 | 810 | putstr("\n\t"); |
52b983f1 DS |
811 | tmp->tn.op = OREG; |
812 | tmp->tn.lval = srclen - dstlen; | |
813 | } | |
814 | genconv(ISUNSIGNED(dsttype), dstlen, SZINT/SZCHAR, tmp, dst); | |
815 | tmp->in.op = FREE; | |
816 | return; | |
817 | } | |
818 | ||
819 | genconv(ISUNSIGNED(dsttype), | |
820 | srclen, dst->in.op == REG ? SZINT/SZCHAR : dstlen, | |
821 | src, dst); | |
822 | } | |
823 | ||
824 | genconv(usrc, srclen, dstlen, src, dst) | |
26ab1ae0 DS |
825 | int usrc; |
826 | register int srclen, dstlen; | |
52b983f1 DS |
827 | NODE *src, *dst; |
828 | { | |
52b983f1 DS |
829 | if (srclen != dstlen) { |
830 | if (usrc && srclen < dstlen) | |
c3446016 | 831 | putstr("movz"); |
52b983f1 | 832 | else |
c3446016 | 833 | putstr("cvt"); |
26ab1ae0 | 834 | prlen(srclen); |
52b983f1 | 835 | } else |
c3446016 | 836 | putstr("mov"); |
26ab1ae0 | 837 | prlen(dstlen); |
52b983f1 DS |
838 | putchar('\t'); |
839 | adrput(src); | |
840 | putchar(','); | |
841 | adrput(dst); | |
842 | } | |
f1824a4b | 843 | |
f2b49199 SL |
844 | rmove( rt, rs, t ) TWORD t;{ |
845 | printf( " movl %s,%s\n", rname(rs), rname(rt) ); | |
846 | if(t==DOUBLE) | |
847 | printf( " movl %s,%s\n", rname(rs+1), rname(rt+1) ); | |
848 | } | |
849 | ||
850 | struct respref | |
851 | respref[] = { | |
852 | INTAREG|INTBREG, INTAREG|INTBREG, | |
853 | INAREG|INBREG, INAREG|INBREG|SOREG|STARREG|STARNM|SNAME|SCON, | |
854 | INTEMP, INTEMP, | |
855 | FORARG, FORARG, | |
856 | INTEMP, INTAREG|INAREG|INTBREG|INBREG|SOREG|STARREG|STARNM, | |
857 | 0, 0 }; | |
858 | ||
859 | setregs(){ /* set up temporary registers */ | |
860 | fregs = 6; /* tbl- 6 free regs on Tahoe (0-5) */ | |
861 | } | |
862 | ||
ebdd0416 | 863 | #ifndef szty |
f2b49199 SL |
864 | szty(t) TWORD t;{ /* size, in registers, needed to hold thing of type t */ |
865 | return(t==DOUBLE ? 2 : 1 ); | |
866 | } | |
ebdd0416 | 867 | #endif |
f2b49199 SL |
868 | |
869 | rewfld( p ) NODE *p; { | |
870 | return(1); | |
871 | } | |
872 | ||
873 | callreg(p) NODE *p; { | |
874 | return( R0 ); | |
875 | } | |
876 | ||
877 | base( p ) register NODE *p; { | |
878 | register int o = p->in.op; | |
879 | ||
880 | if( (o==ICON && p->in.name[0] != '\0')) return( 100 ); /* ie no base reg */ | |
881 | if( o==REG ) return( p->tn.rval ); | |
882 | if( (o==PLUS || o==MINUS) && p->in.left->in.op == REG && p->in.right->in.op==ICON) | |
883 | return( p->in.left->tn.rval ); | |
884 | if( o==OREG && !R2TEST(p->tn.rval) && (p->in.type==INT || p->in.type==UNSIGNED || ISPTR(p->in.type)) ) | |
885 | return( p->tn.rval + 0200*1 ); | |
886 | return( -1 ); | |
887 | } | |
888 | ||
889 | offset( p, tyl ) register NODE *p; int tyl; { | |
890 | ||
891 | if(tyl > 8) return( -1 ); | |
892 | if( tyl==1 && p->in.op==REG && (p->in.type==INT || p->in.type==UNSIGNED) ) return( p->tn.rval ); | |
893 | if( (p->in.op==LS && p->in.left->in.op==REG && (p->in.left->in.type==INT || p->in.left->in.type==UNSIGNED) && | |
894 | (p->in.right->in.op==ICON && p->in.right->in.name[0]=='\0') | |
895 | && (1<<p->in.right->tn.lval)==tyl)) | |
896 | return( p->in.left->tn.rval ); | |
897 | return( -1 ); | |
898 | } | |
899 | ||
900 | makeor2( p, q, b, o) register NODE *p, *q; register int b, o; { | |
901 | register NODE *t; | |
902 | register int i; | |
903 | NODE *f; | |
904 | ||
905 | p->in.op = OREG; | |
906 | f = p->in.left; /* have to free this subtree later */ | |
907 | ||
908 | /* init base */ | |
909 | switch (q->in.op) { | |
910 | case ICON: | |
911 | case REG: | |
912 | case OREG: | |
913 | t = q; | |
914 | break; | |
915 | ||
916 | case MINUS: | |
917 | q->in.right->tn.lval = -q->in.right->tn.lval; | |
918 | case PLUS: | |
919 | t = q->in.right; | |
920 | break; | |
921 | ||
922 | case UNARY MUL: | |
923 | t = q->in.left->in.left; | |
924 | break; | |
925 | ||
926 | default: | |
927 | cerror("illegal makeor2"); | |
928 | } | |
929 | ||
930 | p->tn.lval = t->tn.lval; | |
931 | #ifndef FLEXNAMES | |
932 | for(i=0; i<NCHNAM; ++i) | |
933 | p->in.name[i] = t->in.name[i]; | |
934 | #else | |
935 | p->in.name = t->in.name; | |
936 | #endif | |
937 | ||
938 | /* init offset */ | |
939 | p->tn.rval = R2PACK( (b & 0177), o, (b>>7) ); | |
940 | ||
941 | tfree(f); | |
942 | return; | |
943 | } | |
944 | ||
945 | canaddr( p ) NODE *p; { | |
946 | register int o = p->in.op; | |
947 | ||
948 | if( o==NAME || o==REG || o==ICON || o==OREG || (o==UNARY MUL && shumul(p->in.left)) ) return(1); | |
949 | return(0); | |
950 | } | |
951 | ||
ebdd0416 | 952 | #ifndef shltype |
f2b49199 SL |
953 | shltype( o, p ) register NODE *p; { |
954 | return( o== REG || o == NAME || o == ICON || o == OREG || ( o==UNARY MUL && shumul(p->in.left)) ); | |
955 | } | |
ebdd0416 | 956 | #endif |
f2b49199 SL |
957 | |
958 | flshape( p ) NODE *p; { | |
959 | register int o = p->in.op; | |
960 | ||
961 | if( o==NAME || o==REG || o==ICON || o==OREG || (o==UNARY MUL && shumul(p->in.left)) ) return(1); | |
962 | return(0); | |
963 | } | |
964 | ||
965 | shtemp( p ) register NODE *p; { | |
966 | if( p->in.op == STARG ) p = p->in.left; | |
967 | return( p->in.op==NAME || p->in.op ==ICON || p->in.op == OREG || (p->in.op==UNARY MUL && shumul(p->in.left)) ); | |
968 | } | |
969 | ||
970 | shumul( p ) register NODE *p; { | |
971 | register int o; | |
972 | extern int xdebug; | |
973 | ||
974 | if (xdebug) { | |
975 | printf("\nshumul:op=%d,lop=%d,rop=%d", p->in.op, p->in.left->in.op, p->in.right->in.op); | |
976 | printf(" prname=%s,plty=%d, prlval=%D\n", p->in.right->in.name, p->in.left->in.type, p->in.right->tn.lval); | |
977 | } | |
978 | ||
979 | o = p->in.op; | |
980 | if(( o == NAME || (o == OREG && !R2TEST(p->tn.rval)) || o == ICON ) | |
981 | && p->in.type != PTR+DOUBLE) | |
982 | return( STARNM ); | |
983 | ||
984 | return( 0 ); | |
985 | } | |
986 | ||
987 | special( p, shape ) register NODE *p; { | |
988 | if( shape==SIREG && p->in.op == OREG && R2TEST(p->tn.rval) ) return(1); | |
989 | else return(0); | |
990 | } | |
991 | ||
992 | adrcon( val ) CONSZ val; { | |
7412b41b | 993 | printf(ACONFMT, val); |
f2b49199 SL |
994 | } |
995 | ||
996 | conput( p ) register NODE *p; { | |
997 | switch( p->in.op ){ | |
998 | ||
999 | case ICON: | |
1000 | acon( p ); | |
1001 | return; | |
1002 | ||
1003 | case REG: | |
895241c8 | 1004 | putstr(rname(p->tn.rval)); |
f2b49199 SL |
1005 | return; |
1006 | ||
1007 | default: | |
1008 | cerror( "illegal conput" ); | |
1009 | } | |
1010 | } | |
1011 | ||
1012 | insput( p ) NODE *p; { | |
1013 | cerror( "insput" ); | |
1014 | } | |
1015 | ||
f2b49199 SL |
1016 | adrput( p ) register NODE *p; { |
1017 | register int r; | |
1018 | /* output an address, with offsets, from p */ | |
1019 | ||
1020 | if( p->in.op == FLD ){ | |
1021 | p = p->in.left; | |
1022 | } | |
1023 | switch( p->in.op ){ | |
1024 | ||
1025 | case NAME: | |
1026 | acon( p ); | |
1027 | return; | |
1028 | ||
1029 | case ICON: | |
1030 | /* addressable value of the constant */ | |
895241c8 | 1031 | putchar('$'); |
f2b49199 SL |
1032 | acon( p ); |
1033 | return; | |
1034 | ||
1035 | case REG: | |
895241c8 | 1036 | putstr(rname(p->tn.rval)); |
f2b49199 SL |
1037 | if(p->in.type == DOUBLE) /* for entry mask */ |
1038 | (void) rname(p->tn.rval+1); | |
1039 | return; | |
1040 | ||
1041 | case OREG: | |
1042 | r = p->tn.rval; | |
1043 | if( R2TEST(r) ){ /* double indexing */ | |
1044 | register int flags; | |
1045 | ||
1046 | flags = R2UPK3(r); | |
895241c8 | 1047 | if( flags & 1 ) putchar('*'); |
f2b49199 SL |
1048 | if( p->tn.lval != 0 || p->in.name[0] != '\0' ) acon(p); |
1049 | if( R2UPK1(r) != 100) printf( "(%s)", rname(R2UPK1(r)) ); | |
1050 | printf( "[%s]", rname(R2UPK2(r)) ); | |
1051 | return; | |
1052 | } | |
1053 | if( r == FP && p->tn.lval > 0 ){ /* in the argument region */ | |
1054 | if( p->in.name[0] != '\0' ) werror( "bad arg temp" ); | |
1055 | printf( CONFMT, p->tn.lval ); | |
895241c8 | 1056 | putstr( "(fp)" ); |
f2b49199 SL |
1057 | return; |
1058 | } | |
1059 | if( p->tn.lval != 0 || p->in.name[0] != '\0') acon( p ); | |
1060 | printf( "(%s)", rname(p->tn.rval) ); | |
1061 | return; | |
1062 | ||
1063 | case UNARY MUL: | |
1064 | /* STARNM or STARREG found */ | |
1065 | if( tshape(p, STARNM) ) { | |
895241c8 | 1066 | putchar( '*' ); |
f2b49199 SL |
1067 | adrput( p->in.left); |
1068 | } | |
1069 | return; | |
1070 | ||
1071 | default: | |
1072 | cerror( "illegal address" ); | |
1073 | return; | |
1074 | ||
1075 | } | |
1076 | ||
1077 | } | |
1078 | ||
1079 | acon( p ) register NODE *p; { /* print out a constant */ | |
1080 | ||
1081 | if( p->in.name[0] == '\0' ){ | |
1082 | printf( CONFMT, p->tn.lval); | |
895241c8 SL |
1083 | return; |
1084 | } else { | |
f2b49199 SL |
1085 | #ifndef FLEXNAMES |
1086 | printf( "%.8s", p->in.name ); | |
1087 | #else | |
895241c8 | 1088 | putstr(p->in.name); |
f2b49199 | 1089 | #endif |
895241c8 SL |
1090 | if (p->tn.lval != 0) { |
1091 | putchar('+'); | |
1092 | printf(CONFMT, p->tn.lval); | |
f2b49199 | 1093 | } |
895241c8 | 1094 | } |
f2b49199 SL |
1095 | } |
1096 | ||
1097 | genscall( p, cookie ) register NODE *p; { | |
1098 | /* structure valued call */ | |
1099 | return( gencall( p, cookie ) ); | |
1100 | } | |
1101 | ||
1102 | genfcall( p, cookie ) register NODE *p; { | |
1103 | register NODE *p1; | |
1104 | register int m; | |
1105 | static char *funcops[6] = { | |
1106 | "sin", "cos", "sqrt", "exp", "log", "atan" | |
1107 | }; | |
1108 | ||
1109 | /* generate function opcodes */ | |
1110 | if(p->in.op==UNARY FORTCALL && p->in.type==FLOAT && | |
1111 | (p1 = p->in.left)->in.op==ICON && | |
1112 | p1->tn.lval==0 && p1->in.type==INCREF(FTN|FLOAT)) { | |
1113 | #ifdef FLEXNAMES | |
1114 | p1->in.name++; | |
1115 | #else | |
1116 | strcpy(p1->in.name, p1->in.name[1]); | |
1117 | #endif | |
1118 | for(m=0; m<6; m++) | |
1119 | if(!strcmp(p1->in.name, funcops[m])) | |
1120 | break; | |
1121 | if(m >= 6) | |
1122 | uerror("no opcode for fortarn function %s", p1->in.name); | |
1123 | } else | |
1124 | uerror("illegal type of fortarn function"); | |
1125 | p1 = p->in.right; | |
1126 | p->in.op = FORTCALL; | |
1127 | if(!canaddr(p1)) | |
1128 | order( p1, INAREG|INBREG|SOREG|STARREG|STARNM ); | |
1129 | m = match( p, INTAREG|INTBREG ); | |
1130 | return(m != MDONE); | |
1131 | } | |
1132 | ||
1133 | /* tbl */ | |
1134 | int gc_numbytes; | |
1135 | /* tbl */ | |
1136 | ||
1137 | gencall( p, cookie ) register NODE *p; { | |
1138 | /* generate the call given by p */ | |
1139 | register NODE *p1, *ptemp; | |
1140 | register int temp, temp1; | |
1141 | register int m; | |
1142 | ||
1143 | if( p->in.right ) temp = argsize( p->in.right ); | |
1144 | else temp = 0; | |
1145 | ||
1146 | if( p->in.op == STCALL || p->in.op == UNARY STCALL ){ | |
1147 | /* set aside room for structure return */ | |
1148 | ||
1149 | if( p->stn.stsize > temp ) temp1 = p->stn.stsize; | |
1150 | else temp1 = temp; | |
1151 | } | |
1152 | ||
1153 | if( temp > maxargs ) maxargs = temp; | |
1154 | SETOFF(temp1,4); | |
1155 | ||
1156 | if( p->in.right ){ /* make temp node, put offset in, and generate args */ | |
1157 | ptemp = talloc(); | |
1158 | ptemp->in.op = OREG; | |
1159 | ptemp->tn.lval = -1; | |
1160 | ptemp->tn.rval = SP; | |
1161 | #ifndef FLEXNAMES | |
1162 | ptemp->in.name[0] = '\0'; | |
1163 | #else | |
1164 | ptemp->in.name = ""; | |
1165 | #endif | |
1166 | ptemp->in.rall = NOPREF; | |
1167 | ptemp->in.su = 0; | |
1168 | genargs( p->in.right, ptemp ); | |
1169 | ptemp->in.op = FREE; | |
1170 | } | |
1171 | ||
1172 | p1 = p->in.left; | |
1173 | if( p1->in.op != ICON ){ | |
1174 | if( p1->in.op != REG ){ | |
1175 | if( p1->in.op != OREG || R2TEST(p1->tn.rval) ){ | |
1176 | if( p1->in.op != NAME ){ | |
1177 | order( p1, INAREG ); | |
1178 | } | |
1179 | } | |
1180 | } | |
1181 | } | |
1182 | ||
1183 | /* tbl | |
1184 | setup gc_numbytes so reference to ZC works */ | |
1185 | ||
1186 | gc_numbytes = temp&(0x3ff); | |
1187 | ||
1188 | p->in.op = UNARY CALL; | |
1189 | m = match( p, INTAREG|INTBREG ); | |
1190 | ||
1191 | return(m != MDONE); | |
1192 | } | |
1193 | ||
1194 | /* tbl */ | |
1195 | char * | |
1196 | ccbranches[] = { | |
1197 | "eql", | |
1198 | "neq", | |
1199 | "leq", | |
1200 | "lss", | |
1201 | "geq", | |
1202 | "gtr", | |
1203 | "lequ", | |
1204 | "lssu", | |
1205 | "gequ", | |
1206 | "gtru", | |
1207 | }; | |
1208 | /* tbl */ | |
1209 | ||
1210 | cbgen( o, lab, mode ) { /* printf conditional and unconditional branches */ | |
1211 | ||
1212 | if(o != 0 && (o < EQ || o > UGT )) | |
1213 | cerror( "bad conditional branch: %s", opst[o] ); | |
1214 | printf( " j%s L%d\n", | |
1215 | o == 0 ? "br" : ccbranches[o-EQ], lab ); | |
1216 | } | |
1217 | ||
1218 | nextcook( p, cookie ) NODE *p; { | |
1219 | /* we have failed to match p with cookie; try another */ | |
1220 | if( cookie == FORREW ) return( 0 ); /* hopeless! */ | |
1221 | if( !(cookie&(INTAREG|INTBREG)) ) return( INTAREG|INTBREG ); | |
1222 | if( !(cookie&INTEMP) && asgop(p->in.op) ) return( INTEMP|INAREG|INTAREG|INTBREG|INBREG ); | |
1223 | return( FORREW ); | |
1224 | } | |
1225 | ||
1226 | lastchance( p, cook ) NODE *p; { | |
1227 | /* forget it! */ | |
1228 | return(0); | |
1229 | } | |
1230 | ||
1231 | optim2( p ) register NODE *p; { | |
1232 | # ifdef ONEPASS | |
1233 | /* do local tree transformations and optimizations */ | |
1234 | # define RV(p) p->in.right->tn.lval | |
ebdd0416 | 1235 | # define nncon(p) ((p)->in.op == ICON && (p)->in.name[0] == 0) |
f1824a4b SL |
1236 | register int o, i; |
1237 | register NODE *l, *r; | |
f2b49199 | 1238 | |
f1824a4b SL |
1239 | switch (o = p->in.op) { |
1240 | ||
1241 | case DIV: case ASG DIV: | |
1242 | case MOD: case ASG MOD: | |
1243 | /* | |
1244 | * Change unsigned mods and divs to | |
1245 | * logicals (mul is done in mip & c2) | |
1246 | */ | |
1247 | if (ISUNSIGNED(p->in.left->in.type) && nncon(p->in.right) && | |
1248 | (i = ispow2(RV(p))) >= 0) { | |
1249 | if (o == DIV || o == ASG DIV) { | |
1250 | p->in.op = RS; | |
1251 | RV(p) = i; | |
1252 | } else { | |
1253 | p->in.op = AND; | |
1254 | RV(p)--; | |
1255 | } | |
1256 | if (asgop(o)) | |
1257 | p->in.op = ASG p->in.op; | |
1258 | } | |
1259 | return; | |
1260 | ||
1261 | case SCONV: | |
1262 | l = p->in.left; | |
1263 | /* clobber conversions w/o side effects */ | |
1264 | if (!anyfloat(p, l) && l->in.op != PCONV && | |
1265 | tlen(p) == tlen(l)) { | |
1266 | if (l->in.op != FLD) | |
1267 | l->in.type = p->in.type; | |
1268 | ncopy(p, l); | |
1269 | l->in.op = FREE; | |
1270 | } | |
1271 | return; | |
1272 | ||
1273 | case ASSIGN: | |
1274 | /* | |
1275 | * Try to zap storage conversions of non-float items. | |
1276 | */ | |
1277 | r = p->in.right; | |
1278 | if (r->in.op == SCONV && !anyfloat(r->in.left, r)) { | |
1279 | int wdest, wconv, wsrc; | |
1280 | wdest = tlen(p->in.left); | |
1281 | wconv = tlen(r); | |
1282 | /* | |
1283 | * If size doesn't change across assignment or | |
1284 | * conversion expands src before shrinking again | |
1285 | * due to the assignment, delete conversion so | |
1286 | * code generator can create optimal code. | |
1287 | */ | |
1288 | if (wdest == wconv || | |
1289 | (wdest == (wsrc = tlen(r->in.left)) && wconv > wsrc)) { | |
1290 | p->in.right = r->in.left; | |
1291 | r->in.op = FREE; | |
1292 | } | |
f2b49199 | 1293 | } |
f1824a4b | 1294 | return; |
f2b49199 SL |
1295 | } |
1296 | # endif | |
1297 | } | |
1298 | ||
1299 | struct functbl { | |
1300 | int fop; | |
20018a56 | 1301 | TWORD ftype; |
f2b49199 | 1302 | char *func; |
20018a56 DS |
1303 | } opfunc[] = { |
1304 | DIV, TANY, "udiv", | |
1305 | MOD, TANY, "urem", | |
1306 | ASG DIV, TANY, "audiv", | |
1307 | ASG MOD, TANY, "aurem", | |
1308 | 0, 0, 0 }; | |
f2b49199 SL |
1309 | |
1310 | hardops(p) register NODE *p; { | |
1311 | /* change hard to do operators into function calls. */ | |
1312 | register NODE *q; | |
1313 | register struct functbl *f; | |
20018a56 DS |
1314 | register o; |
1315 | NODE *old,*temp; | |
f2b49199 SL |
1316 | |
1317 | o = p->in.op; | |
20018a56 DS |
1318 | if( ! (optype(o)==BITYPE && |
1319 | (ISUNSIGNED(p->in.left->in.type) || | |
1320 | ISUNSIGNED(p->in.right->in.type))) ) | |
1321 | return; | |
f2b49199 SL |
1322 | |
1323 | for( f=opfunc; f->fop; f++ ) { | |
1324 | if( o==f->fop ) goto convert; | |
20018a56 | 1325 | } |
f2b49199 SL |
1326 | return; |
1327 | ||
1328 | convert: | |
f2b49199 | 1329 | if( asgop( o ) ) { |
20018a56 DS |
1330 | old = NIL; |
1331 | switch( p->in.left->in.op ){ | |
1332 | case FLD: | |
1333 | q = p->in.left->in.left; | |
1334 | /* | |
1335 | * rewrite (lval.fld /= rval); as | |
1336 | * ((*temp).fld = udiv((*(temp = &lval)).fld,rval)); | |
1337 | * else the compiler will evaluate lval twice. | |
1338 | */ | |
1339 | if( q->in.op == UNARY MUL ){ | |
1340 | /* first allocate a temp storage */ | |
1341 | temp = talloc(); | |
1342 | temp->in.op = OREG; | |
1343 | temp->tn.rval = TMPREG; | |
1344 | temp->tn.lval = BITOOR(freetemp(1)); | |
1345 | temp->in.type = INCREF(p->in.type); | |
1346 | #ifdef FLEXNAMES | |
1347 | temp->in.name = ""; | |
1348 | #else | |
1349 | temp->in.name[0] = '\0'; | |
1350 | #endif | |
1351 | old = q->in.left; | |
1352 | q->in.left = temp; | |
1353 | } | |
1354 | /* fall thru ... */ | |
f2b49199 | 1355 | |
20018a56 DS |
1356 | case REG: |
1357 | case NAME: | |
1358 | case OREG: | |
1359 | /* change ASG OP to a simple OP */ | |
1360 | q = talloc(); | |
1361 | q->in.op = NOASG p->in.op; | |
1362 | q->in.rall = NOPREF; | |
1363 | q->in.type = p->in.type; | |
1364 | q->in.left = tcopy(p->in.left); | |
1365 | q->in.right = p->in.right; | |
1366 | p->in.op = ASSIGN; | |
1367 | p->in.right = q; | |
1368 | p = q; | |
1369 | f -= 2; /* Note: this depends on the table order */ | |
1370 | /* on the right side only - replace *temp with | |
1371 | *(temp = &lval), build the assignment node */ | |
1372 | if( old ){ | |
1373 | temp = q->in.left->in.left; /* the "*" node */ | |
1374 | q = talloc(); | |
1375 | q->in.op = ASSIGN; | |
1376 | q->in.left = temp->in.left; | |
1377 | q->in.right = old; | |
1378 | q->in.type = old->in.type; | |
1379 | #ifdef FLEXNAMES | |
1380 | q->in.name = ""; | |
f2b49199 | 1381 | #else |
20018a56 | 1382 | q->in.name[0] = '\0'; |
f2b49199 | 1383 | #endif |
20018a56 DS |
1384 | temp->in.left = q; |
1385 | } | |
1386 | break; | |
f2b49199 | 1387 | |
20018a56 DS |
1388 | case UNARY MUL: |
1389 | /* avoid doing side effects twice */ | |
1390 | q = p->in.left; | |
1391 | p->in.left = q->in.left; | |
1392 | q->in.op = FREE; | |
1393 | break; | |
1394 | ||
1395 | default: | |
1396 | cerror( "hardops: can't compute & LHS" ); | |
1397 | } | |
1398 | } | |
f2b49199 | 1399 | |
20018a56 DS |
1400 | /* build comma op for args to function */ |
1401 | q = talloc(); | |
1402 | q->in.op = CM; | |
1403 | q->in.rall = NOPREF; | |
1404 | q->in.type = INT; | |
1405 | q->in.left = p->in.left; | |
1406 | q->in.right = p->in.right; | |
f2b49199 SL |
1407 | p->in.op = CALL; |
1408 | p->in.right = q; | |
1409 | ||
1410 | /* put function name in left node of call */ | |
1411 | p->in.left = q = talloc(); | |
1412 | q->in.op = ICON; | |
1413 | q->in.rall = NOPREF; | |
1414 | q->in.type = INCREF( FTN + p->in.type ); | |
1415 | #ifndef FLEXNAMES | |
20018a56 | 1416 | strcpy( q->in.name, f->func ); |
f2b49199 | 1417 | #else |
20018a56 | 1418 | q->in.name = f->func; |
f2b49199 SL |
1419 | #endif |
1420 | q->tn.lval = 0; | |
1421 | q->tn.rval = 0; | |
1422 | ||
1423 | } | |
1424 | ||
1425 | zappost(p) NODE *p; { | |
1426 | /* look for ++ and -- operators and remove them */ | |
1427 | ||
1428 | register int o, ty; | |
1429 | register NODE *q; | |
1430 | o = p->in.op; | |
1431 | ty = optype( o ); | |
1432 | ||
1433 | switch( o ){ | |
1434 | ||
1435 | case INCR: | |
1436 | case DECR: | |
1437 | q = p->in.left; | |
1438 | p->in.right->in.op = FREE; /* zap constant */ | |
1439 | ncopy( p, q ); | |
1440 | q->in.op = FREE; | |
1441 | return; | |
1442 | ||
1443 | } | |
1444 | ||
1445 | if( ty == BITYPE ) zappost( p->in.right ); | |
1446 | if( ty != LTYPE ) zappost( p->in.left ); | |
1447 | } | |
1448 | ||
1449 | fixpre(p) NODE *p; { | |
1450 | ||
1451 | register int o, ty; | |
1452 | o = p->in.op; | |
1453 | ty = optype( o ); | |
1454 | ||
1455 | switch( o ){ | |
1456 | ||
1457 | case ASG PLUS: | |
1458 | p->in.op = PLUS; | |
1459 | break; | |
1460 | case ASG MINUS: | |
1461 | p->in.op = MINUS; | |
1462 | break; | |
1463 | } | |
1464 | ||
1465 | if( ty == BITYPE ) fixpre( p->in.right ); | |
1466 | if( ty != LTYPE ) fixpre( p->in.left ); | |
1467 | } | |
1468 | ||
1469 | NODE * addroreg(l) NODE *l; | |
1470 | /* OREG was built in clocal() | |
1471 | * for an auto or formal parameter | |
1472 | * now its address is being taken | |
1473 | * local code must unwind it | |
1474 | * back to PLUS/MINUS REG ICON | |
1475 | * according to local conventions | |
1476 | */ | |
1477 | { | |
1478 | cerror("address of OREG taken"); | |
1479 | } | |
1480 | ||
1481 | # ifndef ONEPASS | |
1482 | main( argc, argv ) char *argv[]; { | |
1483 | return( mainp2( argc, argv ) ); | |
1484 | } | |
1485 | # endif | |
1486 | ||
f1824a4b SL |
1487 | strip(p) register NODE *p; { |
1488 | NODE *q; | |
1489 | ||
1490 | /* strip nodes off the top when no side effects occur */ | |
1491 | for( ; ; ) { | |
1492 | switch( p->in.op ) { | |
1493 | case SCONV: /* remove lint tidbits */ | |
1494 | q = p->in.left; | |
1495 | ncopy( p, q ); | |
1496 | q->in.op = FREE; | |
1497 | break; | |
1498 | /* could probably add a few more here */ | |
1499 | default: | |
1500 | return; | |
1501 | } | |
1502 | } | |
1503 | } | |
1504 | ||
f2b49199 | 1505 | myreader(p) register NODE *p; { |
f1824a4b | 1506 | strip( p ); /* strip off operations with no side effects */ |
f2b49199 SL |
1507 | walkf( p, hardops ); /* convert ops to function calls */ |
1508 | canon( p ); /* expands r-vals for fileds */ | |
1509 | walkf( p, optim2 ); | |
1510 | } |