Commit | Line | Data |
---|---|---|
f2b49199 | 1 | #ifndef lint |
26ab1ae0 | 2 | static char sccsid[] = "@(#)local2.c 1.13 (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 | ||
199 | case 'A': /* assignment and load (integer only) */ | |
200 | { | |
201 | register NODE *l, *r; | |
202 | ||
203 | if (xdebug) eprint(p, 0, &val, &val); | |
204 | r = getlr(p, 'R'); | |
205 | if (optype(p->in.op) == LTYPE || p->in.op == UNARY MUL) { | |
206 | l = resc; | |
207 | l->in.type = INT; | |
208 | } else | |
209 | l = getlr(p, 'L'); | |
210 | if(r->in.type==FLOAT || r->in.type==DOUBLE | |
211 | || l->in.type==FLOAT || l->in.type==DOUBLE) | |
212 | cerror("float in ZA"); | |
213 | if (r->in.op == ICON) | |
214 | if(r->in.name[0] == '\0') { | |
215 | if (r->tn.lval == 0) { | |
895241c8 | 216 | putstr("clr"); |
f2b49199 | 217 | prtype(l); |
895241c8 | 218 | putchar('\t'); |
f2b49199 SL |
219 | adrput(l); |
220 | return; | |
221 | } | |
222 | if (r->tn.lval < 0 && r->tn.lval >= -63) { | |
895241c8 | 223 | putstr("mneg"); |
f2b49199 SL |
224 | prtype(l); |
225 | r->tn.lval = -r->tn.lval; | |
226 | goto ops; | |
227 | } | |
228 | #ifdef MOVAFASTER | |
229 | } else { | |
895241c8 | 230 | putstr("movab\t"); |
f2b49199 | 231 | acon(r); |
895241c8 | 232 | putchar(','); |
f2b49199 SL |
233 | adrput(l); |
234 | return; | |
235 | #endif MOVAFASTER | |
236 | } | |
237 | ||
238 | if (l->in.op == REG) { | |
239 | if( tlen(l) < tlen(r) ) { | |
895241c8 SL |
240 | putstr(!ISUNSIGNED(l->in.type)? |
241 | "cvt": "movz"); | |
f2b49199 | 242 | prtype(l); |
895241c8 | 243 | putchar('l'); |
f2b49199 SL |
244 | goto ops; |
245 | } else | |
246 | l->in.type = INT; | |
247 | } | |
248 | if (tlen(l) == tlen(r)) { | |
895241c8 | 249 | putstr("mov"); |
f2b49199 SL |
250 | prtype(l); |
251 | goto ops; | |
252 | } else if (tlen(l) > tlen(r) && ISUNSIGNED(r->in.type)) | |
895241c8 | 253 | putstr("movz"); |
f2b49199 | 254 | else |
895241c8 | 255 | putstr("cvt"); |
f2b49199 SL |
256 | prtype(r); |
257 | prtype(l); | |
258 | ops: | |
895241c8 | 259 | putchar('\t'); |
f2b49199 | 260 | adrput(r); |
895241c8 | 261 | putchar(','); |
f2b49199 SL |
262 | adrput(l); |
263 | return; | |
264 | } | |
265 | ||
266 | case 'B': /* get oreg value in temp register for shift */ | |
267 | { | |
268 | register NODE *r; | |
269 | if (xdebug) eprint(p, 0, &val, &val); | |
270 | r = p->in.right; | |
271 | if( tlen(r) == sizeof(int) && r->in.type != FLOAT ) | |
895241c8 | 272 | putstr("movl"); |
f2b49199 | 273 | else { |
895241c8 | 274 | putstr(ISUNSIGNED(r->in.type) ? "movz" : "cvt"); |
f2b49199 | 275 | prtype(r); |
895241c8 | 276 | putchar('l'); |
f2b49199 SL |
277 | } |
278 | return; | |
279 | } | |
280 | ||
281 | case 'C': /* num bytes pushed on arg stack */ | |
282 | { | |
283 | extern int gc_numbytes; | |
284 | extern int xdebug; | |
285 | ||
286 | if (xdebug) printf("->%d<-",gc_numbytes); | |
287 | ||
288 | printf("call%c $%d", | |
289 | (p->in.left->in.op==ICON && gc_numbytes<60)?'f':'s', | |
290 | gc_numbytes+4); | |
291 | /* dont change to double (here's the only place to catch it) */ | |
292 | if(p->in.type == FLOAT) | |
293 | rtyflg = 1; | |
294 | return; | |
295 | } | |
296 | ||
297 | case 'D': /* INCR and DECR */ | |
298 | zzzcode(p->in.left, 'A'); | |
895241c8 | 299 | putstr("\n "); |
f2b49199 SL |
300 | |
301 | case 'E': /* INCR and DECR, FOREFF */ | |
302 | if (p->in.right->tn.lval == 1) | |
303 | { | |
895241c8 | 304 | putstr(p->in.op == INCR ? "inc" : "dec"); |
f2b49199 | 305 | prtype(p->in.left); |
895241c8 | 306 | putchar('\t'); |
f2b49199 SL |
307 | adrput(p->in.left); |
308 | return; | |
309 | } | |
895241c8 | 310 | putstr(p->in.op == INCR ? "add" : "sub"); |
f2b49199 | 311 | prtype(p->in.left); |
895241c8 | 312 | putstr("2 "); |
f2b49199 | 313 | adrput(p->in.right); |
895241c8 | 314 | putchar(','); |
f2b49199 SL |
315 | adrput(p->in.left); |
316 | return; | |
317 | ||
318 | case 'F': /* masked constant for fields */ | |
7412b41b | 319 | printf(ACONFMT, (p->in.right->tn.lval&((1<<fldsz)-1))<<fldshf); |
f2b49199 SL |
320 | return; |
321 | ||
322 | case 'H': /* opcode for shift */ | |
323 | if(p->in.op == LS || p->in.op == ASG LS) | |
895241c8 | 324 | putstr("shll"); |
f2b49199 | 325 | else if(ISUNSIGNED(p->in.left->in.type)) |
895241c8 | 326 | putstr("shrl"); |
f2b49199 | 327 | else |
895241c8 | 328 | putstr("shar"); |
f2b49199 SL |
329 | return; |
330 | ||
331 | case 'L': /* type of left operand */ | |
332 | case 'R': /* type of right operand */ | |
333 | { | |
334 | register NODE *n; | |
335 | extern int xdebug; | |
336 | ||
337 | n = getlr ( p, c); | |
338 | if (xdebug) printf("->%d<-", n->in.type); | |
339 | ||
340 | prtype(n); | |
341 | return; | |
342 | } | |
343 | ||
f1824a4b | 344 | case 'M': { /* initiate ediv for mod and unsigned div */ |
f2b49199 SL |
345 | register char *r; |
346 | m = getlr(p, '1')->tn.rval; | |
347 | r = rname(m); | |
348 | printf("\tclrl\t%s\n\tmovl\t", r); | |
349 | adrput(p->in.left); | |
350 | printf(",%s\n", rname(m+1)); | |
351 | if(!ISUNSIGNED(p->in.type)) { /* should be MOD */ | |
352 | m = getlab(); | |
353 | printf("\tjgeq\tL%d\n\tmnegl\t$1,%s\n", m, r); | |
354 | deflab(m); | |
355 | } | |
f2b49199 | 356 | return; |
f1824a4b | 357 | } |
f2b49199 | 358 | |
f1824a4b SL |
359 | case 'T': { /* rounded structure length for arguments */ |
360 | int size = p->stn.stsize; | |
f2b49199 SL |
361 | SETOFF( size, 4); |
362 | printf("movab -%d(sp),sp", size); | |
363 | return; | |
f1824a4b | 364 | } |
f2b49199 SL |
365 | |
366 | case 'S': /* structure assignment */ | |
1d43595d SL |
367 | stasg(p); |
368 | break; | |
f2b49199 | 369 | |
73fe5b3f SL |
370 | case 'X': /* multiplication for short and char */ |
371 | if (ISUNSIGNED(p->in.left->in.type)) | |
372 | printf("\tmovz"); | |
373 | else | |
374 | printf("\tcvt"); | |
375 | zzzcode(p, 'L'); | |
376 | printf("l\t"); | |
377 | adrput(p->in.left); | |
378 | printf(","); | |
379 | adrput(&resc[0]); | |
380 | printf("\n"); | |
381 | if (ISUNSIGNED(p->in.right->in.type)) | |
382 | printf("\tmovz"); | |
383 | else | |
384 | printf("\tcvt"); | |
385 | zzzcode(p, 'R'); | |
386 | printf("l\t"); | |
387 | adrput(p->in.right); | |
388 | printf(","); | |
389 | adrput(&resc[1]); | |
390 | printf("\n"); | |
391 | return; | |
392 | ||
f1824a4b SL |
393 | case 'U': /* SCONV */ |
394 | case 'V': /* SCONV with FORCC */ | |
395 | sconv(p, c == 'V'); | |
396 | break; | |
397 | ||
398 | case 'Z': | |
399 | p = p->in.right; | |
400 | switch (p->in.type) { | |
401 | case SHORT: { | |
402 | short w = p->tn.lval; | |
403 | p->tn.lval = w; | |
404 | break; | |
405 | } | |
406 | case CHAR: { | |
407 | char c = p->tn.lval; | |
408 | p->tn.lval = c; | |
409 | break; | |
410 | } | |
411 | } | |
412 | printf("$%d", p->tn.lval); | |
413 | break; | |
414 | ||
1d43595d SL |
415 | default: |
416 | cerror( "illegal zzzcode" ); | |
1d43595d | 417 | } |
f1824a4b | 418 | } |
f2b49199 | 419 | |
1d43595d | 420 | #define MOVB(dst, src, off) { \ |
895241c8 | 421 | putstr("\tmovb\t"); upput(src, off); putchar(','); \ |
1d43595d SL |
422 | upput(dst, off); putchar('\n'); \ |
423 | } | |
424 | #define MOVW(dst, src, off) { \ | |
895241c8 | 425 | putstr("\tmovw\t"); upput(src, off); putchar(','); \ |
1d43595d SL |
426 | upput(dst, off); putchar('\n'); \ |
427 | } | |
428 | #define MOVL(dst, src, off) { \ | |
895241c8 | 429 | putstr("\tmovl\t"); upput(src, off); putchar(','); \ |
1d43595d SL |
430 | upput(dst, off); putchar('\n'); \ |
431 | } | |
432 | /* | |
433 | * Generate code for a structure assignment. | |
434 | */ | |
435 | stasg(p) | |
436 | register NODE *p; | |
437 | { | |
438 | register NODE *l, *r; | |
439 | register int size; | |
440 | ||
441 | switch (p->in.op) { | |
442 | case STASG: /* regular assignment */ | |
443 | l = p->in.left; | |
444 | r = p->in.right; | |
445 | break; | |
446 | case STARG: /* place arg on the stack */ | |
447 | l = getlr(p, '3'); | |
448 | r = p->in.left; | |
449 | break; | |
450 | default: | |
451 | cerror("STASG bad"); | |
452 | /*NOTREACHED*/ | |
453 | } | |
454 | /* | |
455 | * Pun source for use in code generation. | |
456 | */ | |
457 | switch (r->in.op) { | |
458 | case ICON: | |
459 | r->in.op = NAME; | |
460 | break; | |
461 | case REG: | |
462 | r->in.op = OREG; | |
463 | break; | |
464 | default: | |
465 | cerror( "STASG-r" ); | |
466 | /*NOTREACHED*/ | |
467 | } | |
468 | size = p->stn.stsize; | |
469 | if (size <= 0 || size > 65535) | |
470 | cerror("structure size out of range"); | |
471 | /* | |
472 | * Generate optimized code based on structure size | |
473 | * and alignment properties.... | |
474 | */ | |
475 | switch (size) { | |
476 | ||
477 | case 1: | |
895241c8 | 478 | putstr("\tmovb\t"); |
1d43595d SL |
479 | optimized: |
480 | adrput(r); | |
895241c8 | 481 | putchar(','); |
1d43595d | 482 | adrput(l); |
895241c8 | 483 | putchar('\n'); |
1d43595d SL |
484 | break; |
485 | ||
486 | case 2: | |
487 | if (p->stn.stalign != 2) { | |
488 | MOVB(l, r, SZCHAR); | |
895241c8 | 489 | putstr("\tmovb\t"); |
1d43595d | 490 | } else |
895241c8 | 491 | putstr("\tmovw\t"); |
1d43595d SL |
492 | goto optimized; |
493 | ||
494 | case 4: | |
495 | if (p->stn.stalign != 4) { | |
496 | if (p->stn.stalign != 2) { | |
497 | MOVB(l, r, 3*SZCHAR); | |
498 | MOVB(l, r, 2*SZCHAR); | |
499 | MOVB(l, r, 1*SZCHAR); | |
895241c8 | 500 | putstr("\tmovb\t"); |
1d43595d SL |
501 | } else { |
502 | MOVW(l, r, SZSHORT); | |
895241c8 | 503 | putstr("\tmovw\t"); |
f2b49199 | 504 | } |
1d43595d | 505 | } else |
895241c8 | 506 | putstr("\tmovl\t"); |
1d43595d SL |
507 | goto optimized; |
508 | ||
509 | case 6: | |
510 | if (p->stn.stalign != 2) | |
511 | goto movblk; | |
512 | MOVW(l, r, 2*SZSHORT); | |
513 | MOVW(l, r, 1*SZSHORT); | |
895241c8 | 514 | putstr("\tmovw\t"); |
1d43595d SL |
515 | goto optimized; |
516 | ||
517 | case 8: | |
518 | if (p->stn.stalign == 4) { | |
519 | MOVL(l, r, SZLONG); | |
895241c8 | 520 | putstr("\tmovl\t"); |
1d43595d SL |
521 | goto optimized; |
522 | } | |
523 | /* fall thru...*/ | |
f2b49199 | 524 | |
1d43595d SL |
525 | default: |
526 | movblk: | |
527 | /* | |
528 | * Can we ever get a register conflict with R1 here? | |
529 | */ | |
895241c8 | 530 | putstr("\tmovab\t"); |
1d43595d | 531 | adrput(l); |
895241c8 | 532 | putstr(",r1\n\tmovab\t"); |
1d43595d SL |
533 | adrput(r); |
534 | printf(",r0\n\tmovl\t$%d,r2\n\tmovblk\n", size); | |
535 | rname(R2); | |
f2b49199 | 536 | break; |
1d43595d SL |
537 | } |
538 | /* | |
539 | * Reverse above pun for reclaim. | |
540 | */ | |
541 | if (r->in.op == NAME) | |
542 | r->in.op = ICON; | |
543 | else if (r->in.op == OREG) | |
544 | r->in.op = REG; | |
545 | } | |
f2b49199 | 546 | |
1d43595d SL |
547 | /* |
548 | * Output the address of the second item in the | |
549 | * pair pointed to by p. | |
550 | */ | |
551 | upput(p, size) | |
552 | register NODE *p; | |
553 | { | |
554 | CONSZ save; | |
555 | ||
556 | if (p->in.op == FLD) | |
557 | p = p->in.left; | |
558 | switch (p->in.op) { | |
559 | ||
560 | case NAME: | |
561 | case OREG: | |
562 | save = p->tn.lval; | |
563 | p->tn.lval += size/SZCHAR; | |
564 | adrput(p); | |
565 | p->tn.lval = save; | |
566 | break; | |
567 | ||
568 | case REG: | |
569 | if (size == SZLONG) { | |
895241c8 | 570 | putstr(rname(p->tn.rval+1)); |
1d43595d | 571 | break; |
f2b49199 | 572 | } |
1d43595d SL |
573 | /* fall thru... */ |
574 | ||
575 | default: | |
576 | cerror("illegal upper address op %s size %d", | |
577 | opst[p->tn.op], size); | |
578 | /*NOTREACHED*/ | |
f2b49199 | 579 | } |
1d43595d | 580 | } |
f2b49199 | 581 | |
26ab1ae0 DS |
582 | /* |
583 | * Prlen() is a cheap prtype()... | |
584 | */ | |
585 | static char convtab[SZINT/SZCHAR + 1] = { | |
586 | '?', 'b', 'w', '?', 'l' | |
587 | }; | |
588 | #define prlen(len) putchar(convtab[len]) | |
589 | ||
590 | ||
52b983f1 DS |
591 | /* |
592 | * Generate code for integral scalar conversions. | |
26ab1ae0 DS |
593 | * Some of this code is designed to work around a tahoe misfeature |
594 | * that causes sign- and zero- extension to be defeated in | |
595 | * certain circumstances. | |
596 | * Basically if the source operand of a CVT or MOVZ instruction is | |
597 | * shorter than the destination, and the source is a register | |
598 | * or an immediate constant, sign- and zero- extension are | |
599 | * ignored and the high bits of the source are copied. (Note | |
600 | * that zero-extension is not a problem for immediate | |
601 | * constants.) | |
52b983f1 DS |
602 | */ |
603 | sconv(p, forcc) | |
604 | NODE *p; | |
605 | int forcc; | |
606 | { | |
607 | register NODE *src, *dst; | |
608 | register NODE *tmp; | |
609 | register int srclen, dstlen; | |
610 | int srctype, dsttype; | |
611 | int val; | |
612 | ||
613 | if (p->in.op == ASSIGN) { | |
614 | src = getlr(p, 'R'); | |
615 | dst = getlr(p, 'L'); | |
616 | dstlen = tlen(dst); | |
617 | dsttype = dst->in.type; | |
618 | } else /* if (p->in.op == SCONV || optype(p->in.op) == LTYPE) */ { | |
619 | src = getlr(p, 'L'); | |
620 | dst = getlr(p, '1'); | |
621 | dstlen = tlen(p); | |
622 | dsttype = p->in.type; | |
623 | } | |
624 | ||
26ab1ae0 DS |
625 | if (src->in.op == REG) { |
626 | srclen = SZINT/SZCHAR; | |
627 | srctype = ISUNSIGNED(src->in.type) ? UNSIGNED : INT; | |
628 | } else { | |
629 | srclen = tlen(src); | |
630 | srctype = src->in.type; | |
631 | } | |
632 | ||
633 | if (src->in.op == ICON) { | |
634 | if (src->tn.lval == 0) { | |
635 | putstr("clr"); | |
636 | prtype(dst); | |
637 | putchar('\t'); | |
638 | adrput(dst); | |
639 | return; | |
640 | } | |
641 | if (dstlen < srclen) { | |
642 | switch (dsttype) { | |
643 | case CHAR: | |
644 | src->tn.lval = (char) src->tn.lval; | |
645 | break; | |
646 | case UCHAR: | |
647 | src->tn.lval = (unsigned char) src->tn.lval; | |
648 | break; | |
649 | case SHORT: | |
650 | src->tn.lval = (short) src->tn.lval; | |
651 | break; | |
652 | case USHORT: | |
653 | src->tn.lval = (unsigned short) src->tn.lval; | |
654 | break; | |
655 | } | |
656 | } | |
657 | if (dst->in.op == REG) { | |
658 | dsttype = INT; | |
659 | dstlen = SZINT/SZCHAR; | |
660 | } | |
661 | srctype = dsttype; | |
662 | srclen = dstlen; | |
663 | } | |
52b983f1 DS |
664 | |
665 | if (srclen < dstlen) { | |
666 | if (srctype == CHAR && dsttype == USHORT && dst->in.op == REG) { | |
667 | /* (unsigned short) c; => sign extend to 16 bits */ | |
c3446016 | 668 | putstr("cvtbl\t"); |
52b983f1 DS |
669 | adrput(src); |
670 | putstr(",-(sp)\n\tmovzwl\t2(sp),"); | |
671 | adrput(dst); | |
672 | putstr("\n\tmovab\t4(sp),sp"); | |
673 | if (forcc) { | |
674 | /* inverted test */ | |
675 | putstr("\n\tcmpl\t$0,"); | |
676 | adrput(dst); | |
677 | } | |
678 | return; | |
679 | } | |
680 | genconv(ISUNSIGNED(srctype), | |
681 | srclen, dst->in.op == REG ? SZINT/SZCHAR : dstlen, | |
682 | src, dst); | |
683 | return; | |
684 | } | |
685 | ||
686 | if (srclen > dstlen && dst->in.op == REG) { | |
26ab1ae0 | 687 | /* if dst is a register, the result must look like an int */ |
52b983f1 DS |
688 | if (src->in.op == REG) { |
689 | if (ISUNSIGNED(dsttype)) { | |
690 | val = (1 << dstlen * SZCHAR) - 1; | |
691 | if (src->tn.rval == dst->tn.rval) | |
692 | /* conversion in place */ | |
c3446016 | 693 | printf("andl2\t$%#x,", val); |
52b983f1 | 694 | else { |
c3446016 | 695 | printf("andl3\t$%#x,", val); |
52b983f1 DS |
696 | adrput(src); |
697 | putchar(','); | |
698 | } | |
699 | adrput(dst); | |
700 | return; | |
701 | } | |
26ab1ae0 DS |
702 | /* |
703 | * Sign extension in register can also be | |
704 | * accomplished by shifts, but unfortunately | |
705 | * shifts are extremely slow, due to the lack | |
706 | * of a barrel shifter. | |
707 | */ | |
708 | putstr("pushl\t"); | |
52b983f1 | 709 | adrput(src); |
26ab1ae0 DS |
710 | putstr("\n\tcvt"); |
711 | prlen(dstlen); | |
712 | printf("l\t%d(sp),", SZINT/SZCHAR - dstlen); | |
52b983f1 | 713 | adrput(dst); |
26ab1ae0 DS |
714 | putstr("\n\tmovab\t4(sp),sp"); |
715 | if (forcc) { | |
716 | /* inverted test */ | |
717 | putstr("\n\tcmpl\t$0,"); | |
718 | adrput(dst); | |
719 | } | |
52b983f1 DS |
720 | return; |
721 | } | |
722 | tmp = talloc(); | |
723 | if ((src->in.op == UNARY MUL && | |
724 | ((src->in.left->in.op == NAME || | |
725 | (src->in.left->in.op == ICON)))) || | |
726 | (src->in.op == OREG && !R2TEST(src->tn.rval))) { | |
727 | /* we can increment src's address & pun it */ | |
728 | *tmp = *src; | |
729 | tmp->tn.lval += srclen - dstlen; | |
730 | } else { | |
731 | /* we must store src's address */ | |
732 | *tmp = *dst; | |
26ab1ae0 DS |
733 | putstr("mova"); |
734 | prlen(srclen); | |
735 | putchar('\t'); | |
52b983f1 DS |
736 | adrput(src); |
737 | putchar(','); | |
738 | adrput(tmp); | |
c3446016 | 739 | putstr("\n\t"); |
52b983f1 DS |
740 | tmp->tn.op = OREG; |
741 | tmp->tn.lval = srclen - dstlen; | |
742 | } | |
743 | genconv(ISUNSIGNED(dsttype), dstlen, SZINT/SZCHAR, tmp, dst); | |
744 | tmp->in.op = FREE; | |
745 | return; | |
746 | } | |
747 | ||
748 | genconv(ISUNSIGNED(dsttype), | |
749 | srclen, dst->in.op == REG ? SZINT/SZCHAR : dstlen, | |
750 | src, dst); | |
751 | } | |
752 | ||
753 | genconv(usrc, srclen, dstlen, src, dst) | |
26ab1ae0 DS |
754 | int usrc; |
755 | register int srclen, dstlen; | |
52b983f1 DS |
756 | NODE *src, *dst; |
757 | { | |
52b983f1 DS |
758 | if (srclen != dstlen) { |
759 | if (usrc && srclen < dstlen) | |
c3446016 | 760 | putstr("movz"); |
52b983f1 | 761 | else |
c3446016 | 762 | putstr("cvt"); |
26ab1ae0 | 763 | prlen(srclen); |
52b983f1 | 764 | } else |
c3446016 | 765 | putstr("mov"); |
26ab1ae0 | 766 | prlen(dstlen); |
52b983f1 DS |
767 | putchar('\t'); |
768 | adrput(src); | |
769 | putchar(','); | |
770 | adrput(dst); | |
771 | } | |
f1824a4b | 772 | |
f2b49199 SL |
773 | rmove( rt, rs, t ) TWORD t;{ |
774 | printf( " movl %s,%s\n", rname(rs), rname(rt) ); | |
775 | if(t==DOUBLE) | |
776 | printf( " movl %s,%s\n", rname(rs+1), rname(rt+1) ); | |
777 | } | |
778 | ||
779 | struct respref | |
780 | respref[] = { | |
781 | INTAREG|INTBREG, INTAREG|INTBREG, | |
782 | INAREG|INBREG, INAREG|INBREG|SOREG|STARREG|STARNM|SNAME|SCON, | |
783 | INTEMP, INTEMP, | |
784 | FORARG, FORARG, | |
785 | INTEMP, INTAREG|INAREG|INTBREG|INBREG|SOREG|STARREG|STARNM, | |
786 | 0, 0 }; | |
787 | ||
788 | setregs(){ /* set up temporary registers */ | |
789 | fregs = 6; /* tbl- 6 free regs on Tahoe (0-5) */ | |
790 | } | |
791 | ||
ebdd0416 | 792 | #ifndef szty |
f2b49199 SL |
793 | szty(t) TWORD t;{ /* size, in registers, needed to hold thing of type t */ |
794 | return(t==DOUBLE ? 2 : 1 ); | |
795 | } | |
ebdd0416 | 796 | #endif |
f2b49199 SL |
797 | |
798 | rewfld( p ) NODE *p; { | |
799 | return(1); | |
800 | } | |
801 | ||
802 | callreg(p) NODE *p; { | |
803 | return( R0 ); | |
804 | } | |
805 | ||
806 | base( p ) register NODE *p; { | |
807 | register int o = p->in.op; | |
808 | ||
809 | if( (o==ICON && p->in.name[0] != '\0')) return( 100 ); /* ie no base reg */ | |
810 | if( o==REG ) return( p->tn.rval ); | |
811 | if( (o==PLUS || o==MINUS) && p->in.left->in.op == REG && p->in.right->in.op==ICON) | |
812 | return( p->in.left->tn.rval ); | |
813 | if( o==OREG && !R2TEST(p->tn.rval) && (p->in.type==INT || p->in.type==UNSIGNED || ISPTR(p->in.type)) ) | |
814 | return( p->tn.rval + 0200*1 ); | |
815 | return( -1 ); | |
816 | } | |
817 | ||
818 | offset( p, tyl ) register NODE *p; int tyl; { | |
819 | ||
820 | if(tyl > 8) return( -1 ); | |
821 | if( tyl==1 && p->in.op==REG && (p->in.type==INT || p->in.type==UNSIGNED) ) return( p->tn.rval ); | |
822 | if( (p->in.op==LS && p->in.left->in.op==REG && (p->in.left->in.type==INT || p->in.left->in.type==UNSIGNED) && | |
823 | (p->in.right->in.op==ICON && p->in.right->in.name[0]=='\0') | |
824 | && (1<<p->in.right->tn.lval)==tyl)) | |
825 | return( p->in.left->tn.rval ); | |
826 | return( -1 ); | |
827 | } | |
828 | ||
829 | makeor2( p, q, b, o) register NODE *p, *q; register int b, o; { | |
830 | register NODE *t; | |
831 | register int i; | |
832 | NODE *f; | |
833 | ||
834 | p->in.op = OREG; | |
835 | f = p->in.left; /* have to free this subtree later */ | |
836 | ||
837 | /* init base */ | |
838 | switch (q->in.op) { | |
839 | case ICON: | |
840 | case REG: | |
841 | case OREG: | |
842 | t = q; | |
843 | break; | |
844 | ||
845 | case MINUS: | |
846 | q->in.right->tn.lval = -q->in.right->tn.lval; | |
847 | case PLUS: | |
848 | t = q->in.right; | |
849 | break; | |
850 | ||
851 | case UNARY MUL: | |
852 | t = q->in.left->in.left; | |
853 | break; | |
854 | ||
855 | default: | |
856 | cerror("illegal makeor2"); | |
857 | } | |
858 | ||
859 | p->tn.lval = t->tn.lval; | |
860 | #ifndef FLEXNAMES | |
861 | for(i=0; i<NCHNAM; ++i) | |
862 | p->in.name[i] = t->in.name[i]; | |
863 | #else | |
864 | p->in.name = t->in.name; | |
865 | #endif | |
866 | ||
867 | /* init offset */ | |
868 | p->tn.rval = R2PACK( (b & 0177), o, (b>>7) ); | |
869 | ||
870 | tfree(f); | |
871 | return; | |
872 | } | |
873 | ||
874 | canaddr( p ) NODE *p; { | |
875 | register int o = p->in.op; | |
876 | ||
877 | if( o==NAME || o==REG || o==ICON || o==OREG || (o==UNARY MUL && shumul(p->in.left)) ) return(1); | |
878 | return(0); | |
879 | } | |
880 | ||
ebdd0416 | 881 | #ifndef shltype |
f2b49199 SL |
882 | shltype( o, p ) register NODE *p; { |
883 | return( o== REG || o == NAME || o == ICON || o == OREG || ( o==UNARY MUL && shumul(p->in.left)) ); | |
884 | } | |
ebdd0416 | 885 | #endif |
f2b49199 SL |
886 | |
887 | flshape( p ) NODE *p; { | |
888 | register int o = p->in.op; | |
889 | ||
890 | if( o==NAME || o==REG || o==ICON || o==OREG || (o==UNARY MUL && shumul(p->in.left)) ) return(1); | |
891 | return(0); | |
892 | } | |
893 | ||
894 | shtemp( p ) register NODE *p; { | |
895 | if( p->in.op == STARG ) p = p->in.left; | |
896 | return( p->in.op==NAME || p->in.op ==ICON || p->in.op == OREG || (p->in.op==UNARY MUL && shumul(p->in.left)) ); | |
897 | } | |
898 | ||
899 | shumul( p ) register NODE *p; { | |
900 | register int o; | |
901 | extern int xdebug; | |
902 | ||
903 | if (xdebug) { | |
904 | printf("\nshumul:op=%d,lop=%d,rop=%d", p->in.op, p->in.left->in.op, p->in.right->in.op); | |
905 | printf(" prname=%s,plty=%d, prlval=%D\n", p->in.right->in.name, p->in.left->in.type, p->in.right->tn.lval); | |
906 | } | |
907 | ||
908 | o = p->in.op; | |
909 | if(( o == NAME || (o == OREG && !R2TEST(p->tn.rval)) || o == ICON ) | |
910 | && p->in.type != PTR+DOUBLE) | |
911 | return( STARNM ); | |
912 | ||
913 | return( 0 ); | |
914 | } | |
915 | ||
916 | special( p, shape ) register NODE *p; { | |
917 | if( shape==SIREG && p->in.op == OREG && R2TEST(p->tn.rval) ) return(1); | |
918 | else return(0); | |
919 | } | |
920 | ||
921 | adrcon( val ) CONSZ val; { | |
7412b41b | 922 | printf(ACONFMT, val); |
f2b49199 SL |
923 | } |
924 | ||
925 | conput( p ) register NODE *p; { | |
926 | switch( p->in.op ){ | |
927 | ||
928 | case ICON: | |
929 | acon( p ); | |
930 | return; | |
931 | ||
932 | case REG: | |
895241c8 | 933 | putstr(rname(p->tn.rval)); |
f2b49199 SL |
934 | return; |
935 | ||
936 | default: | |
937 | cerror( "illegal conput" ); | |
938 | } | |
939 | } | |
940 | ||
941 | insput( p ) NODE *p; { | |
942 | cerror( "insput" ); | |
943 | } | |
944 | ||
f2b49199 SL |
945 | adrput( p ) register NODE *p; { |
946 | register int r; | |
947 | /* output an address, with offsets, from p */ | |
948 | ||
949 | if( p->in.op == FLD ){ | |
950 | p = p->in.left; | |
951 | } | |
952 | switch( p->in.op ){ | |
953 | ||
954 | case NAME: | |
955 | acon( p ); | |
956 | return; | |
957 | ||
958 | case ICON: | |
959 | /* addressable value of the constant */ | |
895241c8 | 960 | putchar('$'); |
f2b49199 SL |
961 | acon( p ); |
962 | return; | |
963 | ||
964 | case REG: | |
895241c8 | 965 | putstr(rname(p->tn.rval)); |
f2b49199 SL |
966 | if(p->in.type == DOUBLE) /* for entry mask */ |
967 | (void) rname(p->tn.rval+1); | |
968 | return; | |
969 | ||
970 | case OREG: | |
971 | r = p->tn.rval; | |
972 | if( R2TEST(r) ){ /* double indexing */ | |
973 | register int flags; | |
974 | ||
975 | flags = R2UPK3(r); | |
895241c8 | 976 | if( flags & 1 ) putchar('*'); |
f2b49199 SL |
977 | if( p->tn.lval != 0 || p->in.name[0] != '\0' ) acon(p); |
978 | if( R2UPK1(r) != 100) printf( "(%s)", rname(R2UPK1(r)) ); | |
979 | printf( "[%s]", rname(R2UPK2(r)) ); | |
980 | return; | |
981 | } | |
982 | if( r == FP && p->tn.lval > 0 ){ /* in the argument region */ | |
983 | if( p->in.name[0] != '\0' ) werror( "bad arg temp" ); | |
984 | printf( CONFMT, p->tn.lval ); | |
895241c8 | 985 | putstr( "(fp)" ); |
f2b49199 SL |
986 | return; |
987 | } | |
988 | if( p->tn.lval != 0 || p->in.name[0] != '\0') acon( p ); | |
989 | printf( "(%s)", rname(p->tn.rval) ); | |
990 | return; | |
991 | ||
992 | case UNARY MUL: | |
993 | /* STARNM or STARREG found */ | |
994 | if( tshape(p, STARNM) ) { | |
895241c8 | 995 | putchar( '*' ); |
f2b49199 SL |
996 | adrput( p->in.left); |
997 | } | |
998 | return; | |
999 | ||
1000 | default: | |
1001 | cerror( "illegal address" ); | |
1002 | return; | |
1003 | ||
1004 | } | |
1005 | ||
1006 | } | |
1007 | ||
1008 | acon( p ) register NODE *p; { /* print out a constant */ | |
1009 | ||
1010 | if( p->in.name[0] == '\0' ){ | |
1011 | printf( CONFMT, p->tn.lval); | |
895241c8 SL |
1012 | return; |
1013 | } else { | |
f2b49199 SL |
1014 | #ifndef FLEXNAMES |
1015 | printf( "%.8s", p->in.name ); | |
1016 | #else | |
895241c8 | 1017 | putstr(p->in.name); |
f2b49199 | 1018 | #endif |
895241c8 SL |
1019 | if (p->tn.lval != 0) { |
1020 | putchar('+'); | |
1021 | printf(CONFMT, p->tn.lval); | |
f2b49199 | 1022 | } |
895241c8 | 1023 | } |
f2b49199 SL |
1024 | } |
1025 | ||
1026 | genscall( p, cookie ) register NODE *p; { | |
1027 | /* structure valued call */ | |
1028 | return( gencall( p, cookie ) ); | |
1029 | } | |
1030 | ||
1031 | genfcall( p, cookie ) register NODE *p; { | |
1032 | register NODE *p1; | |
1033 | register int m; | |
1034 | static char *funcops[6] = { | |
1035 | "sin", "cos", "sqrt", "exp", "log", "atan" | |
1036 | }; | |
1037 | ||
1038 | /* generate function opcodes */ | |
1039 | if(p->in.op==UNARY FORTCALL && p->in.type==FLOAT && | |
1040 | (p1 = p->in.left)->in.op==ICON && | |
1041 | p1->tn.lval==0 && p1->in.type==INCREF(FTN|FLOAT)) { | |
1042 | #ifdef FLEXNAMES | |
1043 | p1->in.name++; | |
1044 | #else | |
1045 | strcpy(p1->in.name, p1->in.name[1]); | |
1046 | #endif | |
1047 | for(m=0; m<6; m++) | |
1048 | if(!strcmp(p1->in.name, funcops[m])) | |
1049 | break; | |
1050 | if(m >= 6) | |
1051 | uerror("no opcode for fortarn function %s", p1->in.name); | |
1052 | } else | |
1053 | uerror("illegal type of fortarn function"); | |
1054 | p1 = p->in.right; | |
1055 | p->in.op = FORTCALL; | |
1056 | if(!canaddr(p1)) | |
1057 | order( p1, INAREG|INBREG|SOREG|STARREG|STARNM ); | |
1058 | m = match( p, INTAREG|INTBREG ); | |
1059 | return(m != MDONE); | |
1060 | } | |
1061 | ||
1062 | /* tbl */ | |
1063 | int gc_numbytes; | |
1064 | /* tbl */ | |
1065 | ||
1066 | gencall( p, cookie ) register NODE *p; { | |
1067 | /* generate the call given by p */ | |
1068 | register NODE *p1, *ptemp; | |
1069 | register int temp, temp1; | |
1070 | register int m; | |
1071 | ||
1072 | if( p->in.right ) temp = argsize( p->in.right ); | |
1073 | else temp = 0; | |
1074 | ||
1075 | if( p->in.op == STCALL || p->in.op == UNARY STCALL ){ | |
1076 | /* set aside room for structure return */ | |
1077 | ||
1078 | if( p->stn.stsize > temp ) temp1 = p->stn.stsize; | |
1079 | else temp1 = temp; | |
1080 | } | |
1081 | ||
1082 | if( temp > maxargs ) maxargs = temp; | |
1083 | SETOFF(temp1,4); | |
1084 | ||
1085 | if( p->in.right ){ /* make temp node, put offset in, and generate args */ | |
1086 | ptemp = talloc(); | |
1087 | ptemp->in.op = OREG; | |
1088 | ptemp->tn.lval = -1; | |
1089 | ptemp->tn.rval = SP; | |
1090 | #ifndef FLEXNAMES | |
1091 | ptemp->in.name[0] = '\0'; | |
1092 | #else | |
1093 | ptemp->in.name = ""; | |
1094 | #endif | |
1095 | ptemp->in.rall = NOPREF; | |
1096 | ptemp->in.su = 0; | |
1097 | genargs( p->in.right, ptemp ); | |
1098 | ptemp->in.op = FREE; | |
1099 | } | |
1100 | ||
1101 | p1 = p->in.left; | |
1102 | if( p1->in.op != ICON ){ | |
1103 | if( p1->in.op != REG ){ | |
1104 | if( p1->in.op != OREG || R2TEST(p1->tn.rval) ){ | |
1105 | if( p1->in.op != NAME ){ | |
1106 | order( p1, INAREG ); | |
1107 | } | |
1108 | } | |
1109 | } | |
1110 | } | |
1111 | ||
1112 | /* tbl | |
1113 | setup gc_numbytes so reference to ZC works */ | |
1114 | ||
1115 | gc_numbytes = temp&(0x3ff); | |
1116 | ||
1117 | p->in.op = UNARY CALL; | |
1118 | m = match( p, INTAREG|INTBREG ); | |
1119 | ||
1120 | return(m != MDONE); | |
1121 | } | |
1122 | ||
1123 | /* tbl */ | |
1124 | char * | |
1125 | ccbranches[] = { | |
1126 | "eql", | |
1127 | "neq", | |
1128 | "leq", | |
1129 | "lss", | |
1130 | "geq", | |
1131 | "gtr", | |
1132 | "lequ", | |
1133 | "lssu", | |
1134 | "gequ", | |
1135 | "gtru", | |
1136 | }; | |
1137 | /* tbl */ | |
1138 | ||
1139 | cbgen( o, lab, mode ) { /* printf conditional and unconditional branches */ | |
1140 | ||
1141 | if(o != 0 && (o < EQ || o > UGT )) | |
1142 | cerror( "bad conditional branch: %s", opst[o] ); | |
1143 | printf( " j%s L%d\n", | |
1144 | o == 0 ? "br" : ccbranches[o-EQ], lab ); | |
1145 | } | |
1146 | ||
1147 | nextcook( p, cookie ) NODE *p; { | |
1148 | /* we have failed to match p with cookie; try another */ | |
1149 | if( cookie == FORREW ) return( 0 ); /* hopeless! */ | |
1150 | if( !(cookie&(INTAREG|INTBREG)) ) return( INTAREG|INTBREG ); | |
1151 | if( !(cookie&INTEMP) && asgop(p->in.op) ) return( INTEMP|INAREG|INTAREG|INTBREG|INBREG ); | |
1152 | return( FORREW ); | |
1153 | } | |
1154 | ||
1155 | lastchance( p, cook ) NODE *p; { | |
1156 | /* forget it! */ | |
1157 | return(0); | |
1158 | } | |
1159 | ||
1160 | optim2( p ) register NODE *p; { | |
1161 | # ifdef ONEPASS | |
1162 | /* do local tree transformations and optimizations */ | |
1163 | # define RV(p) p->in.right->tn.lval | |
ebdd0416 | 1164 | # define nncon(p) ((p)->in.op == ICON && (p)->in.name[0] == 0) |
f1824a4b SL |
1165 | register int o, i; |
1166 | register NODE *l, *r; | |
f2b49199 | 1167 | |
f1824a4b SL |
1168 | switch (o = p->in.op) { |
1169 | ||
1170 | case DIV: case ASG DIV: | |
1171 | case MOD: case ASG MOD: | |
1172 | /* | |
1173 | * Change unsigned mods and divs to | |
1174 | * logicals (mul is done in mip & c2) | |
1175 | */ | |
1176 | if (ISUNSIGNED(p->in.left->in.type) && nncon(p->in.right) && | |
1177 | (i = ispow2(RV(p))) >= 0) { | |
1178 | if (o == DIV || o == ASG DIV) { | |
1179 | p->in.op = RS; | |
1180 | RV(p) = i; | |
1181 | } else { | |
1182 | p->in.op = AND; | |
1183 | RV(p)--; | |
1184 | } | |
1185 | if (asgop(o)) | |
1186 | p->in.op = ASG p->in.op; | |
1187 | } | |
1188 | return; | |
1189 | ||
1190 | case SCONV: | |
1191 | l = p->in.left; | |
1192 | /* clobber conversions w/o side effects */ | |
1193 | if (!anyfloat(p, l) && l->in.op != PCONV && | |
1194 | tlen(p) == tlen(l)) { | |
1195 | if (l->in.op != FLD) | |
1196 | l->in.type = p->in.type; | |
1197 | ncopy(p, l); | |
1198 | l->in.op = FREE; | |
1199 | } | |
1200 | return; | |
1201 | ||
1202 | case ASSIGN: | |
1203 | /* | |
1204 | * Try to zap storage conversions of non-float items. | |
1205 | */ | |
1206 | r = p->in.right; | |
1207 | if (r->in.op == SCONV && !anyfloat(r->in.left, r)) { | |
1208 | int wdest, wconv, wsrc; | |
1209 | wdest = tlen(p->in.left); | |
1210 | wconv = tlen(r); | |
1211 | /* | |
1212 | * If size doesn't change across assignment or | |
1213 | * conversion expands src before shrinking again | |
1214 | * due to the assignment, delete conversion so | |
1215 | * code generator can create optimal code. | |
1216 | */ | |
1217 | if (wdest == wconv || | |
1218 | (wdest == (wsrc = tlen(r->in.left)) && wconv > wsrc)) { | |
1219 | p->in.right = r->in.left; | |
1220 | r->in.op = FREE; | |
1221 | } | |
f2b49199 | 1222 | } |
f1824a4b | 1223 | return; |
f2b49199 SL |
1224 | } |
1225 | # endif | |
1226 | } | |
1227 | ||
1228 | struct functbl { | |
1229 | int fop; | |
1230 | char *func; | |
1231 | } opfunc[] = { | |
1232 | DIV, "udiv", | |
1233 | ASG DIV, "udiv", | |
1234 | 0 | |
1235 | }; | |
1236 | ||
1237 | hardops(p) register NODE *p; { | |
1238 | /* change hard to do operators into function calls. */ | |
1239 | register NODE *q; | |
1240 | register struct functbl *f; | |
1241 | register int o; | |
1242 | register TWORD t, t1, t2; | |
1243 | ||
1244 | o = p->in.op; | |
1245 | ||
1246 | for( f=opfunc; f->fop; f++ ) { | |
1247 | if( o==f->fop ) goto convert; | |
1248 | } | |
1249 | return; | |
1250 | ||
1251 | convert: | |
1252 | t = p->in.type; | |
1253 | t1 = p->in.left->in.type; | |
1254 | t2 = p->in.right->in.type; | |
73fe5b3f SL |
1255 | |
1256 | if (!((ISUNSIGNED(t1) && !(ISUNSIGNED(t2))) || | |
1257 | ( t2 == UNSIGNED))) return; | |
f2b49199 SL |
1258 | |
1259 | /* need to rewrite tree for ASG OP */ | |
1260 | /* must change ASG OP to a simple OP */ | |
1261 | if( asgop( o ) ) { | |
1262 | q = talloc(); | |
1263 | q->in.op = NOASG ( o ); | |
1264 | q->in.rall = NOPREF; | |
1265 | q->in.type = p->in.type; | |
1266 | q->in.left = tcopy(p->in.left); | |
1267 | q->in.right = p->in.right; | |
1268 | p->in.op = ASSIGN; | |
1269 | p->in.right = q; | |
1270 | zappost(q->in.left); /* remove post-INCR(DECR) from new node */ | |
1271 | fixpre(q->in.left); /* change pre-INCR(DECR) to +/- */ | |
1272 | p = q; | |
1273 | ||
1274 | } | |
1275 | /* turn logicals to compare 0 */ | |
1276 | else if( logop( o ) ) { | |
1277 | ncopy(q = talloc(), p); | |
1278 | p->in.left = q; | |
1279 | p->in.right = q = talloc(); | |
1280 | q->in.op = ICON; | |
1281 | q->in.type = INT; | |
1282 | #ifndef FLEXNAMES | |
1283 | q->in.name[0] = '\0'; | |
1284 | #else | |
1285 | q->in.name = ""; | |
1286 | #endif | |
1287 | q->tn.lval = 0; | |
1288 | q->tn.rval = 0; | |
1289 | p = p->in.left; | |
1290 | } | |
1291 | ||
1292 | /* build comma op for args to function */ | |
1293 | t1 = p->in.left->in.type; | |
1294 | t2 = 0; | |
1295 | if ( optype(p->in.op) == BITYPE) { | |
1296 | q = talloc(); | |
1297 | q->in.op = CM; | |
1298 | q->in.rall = NOPREF; | |
1299 | q->in.type = INT; | |
1300 | q->in.left = p->in.left; | |
1301 | q->in.right = p->in.right; | |
1302 | t2 = p->in.right->in.type; | |
1303 | } else | |
1304 | q = p->in.left; | |
1305 | ||
1306 | p->in.op = CALL; | |
1307 | p->in.right = q; | |
1308 | ||
1309 | /* put function name in left node of call */ | |
1310 | p->in.left = q = talloc(); | |
1311 | q->in.op = ICON; | |
1312 | q->in.rall = NOPREF; | |
1313 | q->in.type = INCREF( FTN + p->in.type ); | |
1314 | #ifndef FLEXNAMES | |
1315 | strcpy( q->in.name, f->func ); | |
1316 | #else | |
1317 | q->in.name = f->func; | |
1318 | #endif | |
1319 | q->tn.lval = 0; | |
1320 | q->tn.rval = 0; | |
1321 | ||
1322 | } | |
1323 | ||
1324 | zappost(p) NODE *p; { | |
1325 | /* look for ++ and -- operators and remove them */ | |
1326 | ||
1327 | register int o, ty; | |
1328 | register NODE *q; | |
1329 | o = p->in.op; | |
1330 | ty = optype( o ); | |
1331 | ||
1332 | switch( o ){ | |
1333 | ||
1334 | case INCR: | |
1335 | case DECR: | |
1336 | q = p->in.left; | |
1337 | p->in.right->in.op = FREE; /* zap constant */ | |
1338 | ncopy( p, q ); | |
1339 | q->in.op = FREE; | |
1340 | return; | |
1341 | ||
1342 | } | |
1343 | ||
1344 | if( ty == BITYPE ) zappost( p->in.right ); | |
1345 | if( ty != LTYPE ) zappost( p->in.left ); | |
1346 | } | |
1347 | ||
1348 | fixpre(p) NODE *p; { | |
1349 | ||
1350 | register int o, ty; | |
1351 | o = p->in.op; | |
1352 | ty = optype( o ); | |
1353 | ||
1354 | switch( o ){ | |
1355 | ||
1356 | case ASG PLUS: | |
1357 | p->in.op = PLUS; | |
1358 | break; | |
1359 | case ASG MINUS: | |
1360 | p->in.op = MINUS; | |
1361 | break; | |
1362 | } | |
1363 | ||
1364 | if( ty == BITYPE ) fixpre( p->in.right ); | |
1365 | if( ty != LTYPE ) fixpre( p->in.left ); | |
1366 | } | |
1367 | ||
1368 | NODE * addroreg(l) NODE *l; | |
1369 | /* OREG was built in clocal() | |
1370 | * for an auto or formal parameter | |
1371 | * now its address is being taken | |
1372 | * local code must unwind it | |
1373 | * back to PLUS/MINUS REG ICON | |
1374 | * according to local conventions | |
1375 | */ | |
1376 | { | |
1377 | cerror("address of OREG taken"); | |
1378 | } | |
1379 | ||
1380 | # ifndef ONEPASS | |
1381 | main( argc, argv ) char *argv[]; { | |
1382 | return( mainp2( argc, argv ) ); | |
1383 | } | |
1384 | # endif | |
1385 | ||
f1824a4b SL |
1386 | strip(p) register NODE *p; { |
1387 | NODE *q; | |
1388 | ||
1389 | /* strip nodes off the top when no side effects occur */ | |
1390 | for( ; ; ) { | |
1391 | switch( p->in.op ) { | |
1392 | case SCONV: /* remove lint tidbits */ | |
1393 | q = p->in.left; | |
1394 | ncopy( p, q ); | |
1395 | q->in.op = FREE; | |
1396 | break; | |
1397 | /* could probably add a few more here */ | |
1398 | default: | |
1399 | return; | |
1400 | } | |
1401 | } | |
1402 | } | |
1403 | ||
f2b49199 | 1404 | myreader(p) register NODE *p; { |
f1824a4b | 1405 | strip( p ); /* strip off operations with no side effects */ |
f2b49199 SL |
1406 | walkf( p, hardops ); /* convert ops to function calls */ |
1407 | canon( p ); /* expands r-vals for fileds */ | |
1408 | walkf( p, optim2 ); | |
1409 | } |