projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| f2b49199 | 1 | #ifndef lint |
| 7412b41b | 2 | static char sccsid[] = "@(#)local2.c 1.2 (Berkeley) %G%"; |
| f2b49199 SL |
3 | #endif |
| 4 | ||
| 5 | # include "mfile2" | |
| 6 | # include "ctype.h" | |
| 7 | # ifdef FORT | |
| 8 | int ftlab1, ftlab2; | |
| 9 | # endif | |
| 10 | /* a lot of the machine dependent parts of the second pass */ | |
| 11 | ||
| 12 | # define BITMASK(n) ((1L<<n)-1) | |
| 13 | ||
| 14 | # ifndef ONEPASS | |
| 15 | where(c){ | |
| 16 | fprintf( stderr, "%s, line %d: ", filename, lineno ); | |
| 17 | } | |
| 18 | # endif | |
| 19 | ||
| 20 | lineid( l, fn ) char *fn; { | |
| 21 | /* identify line l and file fn */ | |
| 22 | printf( "# line %d, file %s\n", l, fn ); | |
| 23 | } | |
| 24 | ||
| 25 | int ent_mask; | |
| 26 | ||
| 27 | eobl2(){ | |
| 28 | register OFFSZ spoff; /* offset from stack pointer */ | |
| 29 | #ifndef FORT | |
| 30 | extern int ftlab1, ftlab2; | |
| 31 | #endif | |
| 32 | ||
| 33 | spoff = maxoff; | |
| 34 | spoff /= SZCHAR; | |
| 35 | SETOFF(spoff,4); | |
| 36 | #ifdef FORT | |
| 37 | #ifndef FLEXNAMES | |
| 38 | printf( " .set .F%d,%d\n", ftnno, spoff ); | |
| 39 | #else | |
| 40 | /* SHOULD BE L%d ... ftnno but must change pc/f77 */ | |
| 41 | printf( " .set LF%d,%d\n", ftnno, spoff ); | |
| 42 | #endif | |
| 43 | printf( " .set LWM%d,0x%x\n", ftnno, ent_mask&0x1ffc|0x1000); | |
| 44 | #else | |
| 45 | printf( " .set L%d,0x%x\n", ftnno, ent_mask&0x1ffc); | |
| 46 | printf( "L%d:\n", ftlab1); | |
| 47 | if( maxoff > AUTOINIT ) | |
| 48 | printf( " subl3 $%d,fp,sp\n", spoff); | |
| 49 | printf( " jbr L%d\n", ftlab2); | |
| 50 | #endif | |
| 51 | ent_mask = 0; | |
| 52 | maxargs = -1; | |
| 53 | } | |
| 54 | ||
| 55 | struct hoptab { int opmask; char * opstring; } ioptab[] = { | |
| 56 | ||
| 57 | PLUS, "add", | |
| 58 | MINUS, "sub", | |
| 59 | MUL, "mul", | |
| 60 | DIV, "div", | |
| 61 | MOD, "div", | |
| 62 | OR, "or", | |
| 63 | ER, "xor", | |
| 64 | AND, "and", | |
| 65 | -1, "" }; | |
| 66 | ||
| 67 | hopcode( f, o ){ | |
| 68 | /* output the appropriate string from the above table */ | |
| 69 | ||
| 70 | register struct hoptab *q; | |
| 71 | ||
| 72 | if(asgop(o)) | |
| 73 | o = NOASG o; | |
| 74 | for( q = ioptab; q->opmask>=0; ++q ){ | |
| 75 | if( q->opmask == o ){ | |
| 76 | if(f == 'E') | |
| 77 | printf( "e%s", q->opstring); | |
| 78 | else | |
| 79 | printf( "%s%c", q->opstring, tolower(f)); | |
| 80 | return; | |
| 81 | } | |
| 82 | } | |
| 83 | cerror( "no hoptab for %s", opst[o] ); | |
| 84 | } | |
| 85 | ||
| 86 | char * | |
| 87 | rnames[] = { /* keyed to register number tokens */ | |
| 88 | ||
| 89 | "r0", "r1", | |
| 90 | "r2", "r3", "r4", "r5", | |
| 91 | "r6", "r7", "r8", "r9", "r10", "r11", | |
| 92 | "r12", "fp", "sp", "pc", | |
| 93 | }; | |
| 94 | ||
| 95 | /* output register name and update entry mask */ | |
| 96 | char * | |
| 97 | rname(r) | |
| 98 | register int r; | |
| 99 | { | |
| 100 | ||
| 101 | ent_mask |= 1<<r; | |
| 102 | return(rnames[r]); | |
| 103 | } | |
| 104 | ||
| 105 | int rstatus[] = { | |
| 106 | SAREG|STAREG, SAREG|STAREG, | |
| 107 | SAREG|STAREG, SAREG|STAREG, SAREG|STAREG, SAREG|STAREG, | |
| 108 | SAREG, SAREG, SAREG, SAREG, SAREG, SAREG, | |
| 109 | SAREG, SAREG, SAREG, SAREG, | |
| 110 | }; | |
| 111 | ||
| 112 | tlen(p) NODE *p; | |
| 113 | { | |
| 114 | switch(p->in.type) { | |
| 115 | case CHAR: | |
| 116 | case UCHAR: | |
| 117 | return(1); | |
| 118 | ||
| 119 | case SHORT: | |
| 120 | case USHORT: | |
| 121 | return(2); | |
| 122 | ||
| 123 | case DOUBLE: | |
| 124 | return(8); | |
| 125 | ||
| 126 | default: | |
| 127 | return(4); | |
| 128 | } | |
| 129 | } | |
| 130 | ||
| 131 | prtype(n) NODE *n; | |
| 132 | { | |
| 133 | switch (n->in.type) | |
| 134 | { | |
| 135 | ||
| 136 | case DOUBLE: | |
| 137 | printf("d"); | |
| 138 | return; | |
| 139 | ||
| 140 | case FLOAT: | |
| 141 | printf("f"); | |
| 142 | return; | |
| 143 | ||
| 144 | case INT: | |
| 145 | case UNSIGNED: | |
| 146 | printf("l"); | |
| 147 | return; | |
| 148 | ||
| 149 | case SHORT: | |
| 150 | case USHORT: | |
| 151 | printf("w"); | |
| 152 | return; | |
| 153 | ||
| 154 | case CHAR: | |
| 155 | case UCHAR: | |
| 156 | printf("b"); | |
| 157 | return; | |
| 158 | ||
| 159 | default: | |
| 160 | if ( !ISPTR( n->in.type ) ) cerror("zzzcode- bad type"); | |
| 161 | else { | |
| 162 | printf("l"); | |
| 163 | return; | |
| 164 | } | |
| 165 | } | |
| 166 | } | |
| 167 | ||
| 168 | zzzcode( p, c ) register NODE *p; { | |
| 169 | register int m; | |
| 170 | int val; | |
| 171 | switch( c ){ | |
| 172 | ||
| 173 | case 'N': /* logical ops, turned into 0-1 */ | |
| 174 | /* use register given by register 1 */ | |
| 175 | cbgen( 0, m=getlab(), 'I' ); | |
| 176 | deflab( p->bn.label ); | |
| 177 | printf( " clrl %s\n", rname(getlr( p, '1' )->tn.rval) ); | |
| 178 | deflab( m ); | |
| 179 | return; | |
| 180 | ||
| 181 | case 'P': | |
| 182 | cbgen( p->in.op, p->bn.label, c ); | |
| 183 | return; | |
| 184 | ||
| 185 | case 'A': /* assignment and load (integer only) */ | |
| 186 | { | |
| 187 | register NODE *l, *r; | |
| 188 | ||
| 189 | if (xdebug) eprint(p, 0, &val, &val); | |
| 190 | r = getlr(p, 'R'); | |
| 191 | if (optype(p->in.op) == LTYPE || p->in.op == UNARY MUL) { | |
| 192 | l = resc; | |
| 193 | l->in.type = INT; | |
| 194 | } else | |
| 195 | l = getlr(p, 'L'); | |
| 196 | if(r->in.type==FLOAT || r->in.type==DOUBLE | |
| 197 | || l->in.type==FLOAT || l->in.type==DOUBLE) | |
| 198 | cerror("float in ZA"); | |
| 199 | if (r->in.op == ICON) | |
| 200 | if(r->in.name[0] == '\0') { | |
| 201 | if (r->tn.lval == 0) { | |
| 202 | printf("clr"); | |
| 203 | prtype(l); | |
| 204 | printf(" "); | |
| 205 | adrput(l); | |
| 206 | return; | |
| 207 | } | |
| 208 | if (r->tn.lval < 0 && r->tn.lval >= -63) { | |
| 209 | printf("mneg"); | |
| 210 | prtype(l); | |
| 211 | r->tn.lval = -r->tn.lval; | |
| 212 | goto ops; | |
| 213 | } | |
| 214 | #ifdef MOVAFASTER | |
| 215 | } else { | |
| 216 | printf("movab"); | |
| 217 | printf(" "); | |
| 218 | acon(r); | |
| 219 | printf(","); | |
| 220 | adrput(l); | |
| 221 | return; | |
| 222 | #endif MOVAFASTER | |
| 223 | } | |
| 224 | ||
| 225 | if (l->in.op == REG) { | |
| 226 | if( tlen(l) < tlen(r) ) { | |
| 227 | !ISUNSIGNED(l->in.type)? | |
| 228 | printf("cvt"): | |
| 229 | printf("movz"); | |
| 230 | prtype(l); | |
| 231 | printf("l"); | |
| 232 | goto ops; | |
| 233 | } else | |
| 234 | l->in.type = INT; | |
| 235 | } | |
| 236 | if (tlen(l) == tlen(r)) { | |
| 237 | printf("mov"); | |
| 238 | prtype(l); | |
| 239 | goto ops; | |
| 240 | } else if (tlen(l) > tlen(r) && ISUNSIGNED(r->in.type)) | |
| 241 | printf("movz"); | |
| 242 | else | |
| 243 | printf("cvt"); | |
| 244 | prtype(r); | |
| 245 | prtype(l); | |
| 246 | ops: | |
| 247 | printf(" "); | |
| 248 | adrput(r); | |
| 249 | printf(","); | |
| 250 | adrput(l); | |
| 251 | return; | |
| 252 | } | |
| 253 | ||
| 254 | case 'B': /* get oreg value in temp register for shift */ | |
| 255 | { | |
| 256 | register NODE *r; | |
| 257 | if (xdebug) eprint(p, 0, &val, &val); | |
| 258 | r = p->in.right; | |
| 259 | if( tlen(r) == sizeof(int) && r->in.type != FLOAT ) | |
| 260 | printf("movl"); | |
| 261 | else { | |
| 262 | printf(ISUNSIGNED(r->in.type) ? "movz" : "cvt"); | |
| 263 | prtype(r); | |
| 264 | printf("l"); | |
| 265 | } | |
| 266 | return; | |
| 267 | } | |
| 268 | ||
| 269 | case 'C': /* num bytes pushed on arg stack */ | |
| 270 | { | |
| 271 | extern int gc_numbytes; | |
| 272 | extern int xdebug; | |
| 273 | ||
| 274 | if (xdebug) printf("->%d<-",gc_numbytes); | |
| 275 | ||
| 276 | printf("call%c $%d", | |
| 277 | (p->in.left->in.op==ICON && gc_numbytes<60)?'f':'s', | |
| 278 | gc_numbytes+4); | |
| 279 | /* dont change to double (here's the only place to catch it) */ | |
| 280 | if(p->in.type == FLOAT) | |
| 281 | rtyflg = 1; | |
| 282 | return; | |
| 283 | } | |
| 284 | ||
| 285 | case 'D': /* INCR and DECR */ | |
| 286 | zzzcode(p->in.left, 'A'); | |
| 287 | printf("\n "); | |
| 288 | ||
| 289 | case 'E': /* INCR and DECR, FOREFF */ | |
| 290 | if (p->in.right->tn.lval == 1) | |
| 291 | { | |
| 292 | printf("%s", (p->in.op == INCR ? "inc" : "dec") ); | |
| 293 | prtype(p->in.left); | |
| 294 | printf(" "); | |
| 295 | adrput(p->in.left); | |
| 296 | return; | |
| 297 | } | |
| 298 | printf("%s", (p->in.op == INCR ? "add" : "sub") ); | |
| 299 | prtype(p->in.left); | |
| 300 | printf("2 "); | |
| 301 | adrput(p->in.right); | |
| 302 | printf(","); | |
| 303 | adrput(p->in.left); | |
| 304 | return; | |
| 305 | ||
| 306 | case 'F': /* masked constant for fields */ | |
| 7412b41b | 307 | printf(ACONFMT, (p->in.right->tn.lval&((1<<fldsz)-1))<<fldshf); |
| f2b49199 SL |
308 | return; |
| 309 | ||
| 310 | case 'H': /* opcode for shift */ | |
| 311 | if(p->in.op == LS || p->in.op == ASG LS) | |
| 312 | printf("shll"); | |
| 313 | else if(ISUNSIGNED(p->in.left->in.type)) | |
| 314 | printf("shrl"); | |
| 315 | else | |
| 316 | printf("shar"); | |
| 317 | return; | |
| 318 | ||
| 319 | case 'L': /* type of left operand */ | |
| 320 | case 'R': /* type of right operand */ | |
| 321 | { | |
| 322 | register NODE *n; | |
| 323 | extern int xdebug; | |
| 324 | ||
| 325 | n = getlr ( p, c); | |
| 326 | if (xdebug) printf("->%d<-", n->in.type); | |
| 327 | ||
| 328 | prtype(n); | |
| 329 | return; | |
| 330 | } | |
| 331 | ||
| 332 | case 'M': /* initiate ediv for mod and unsigned div */ | |
| 333 | { | |
| 334 | register char *r; | |
| 335 | m = getlr(p, '1')->tn.rval; | |
| 336 | r = rname(m); | |
| 337 | printf("\tclrl\t%s\n\tmovl\t", r); | |
| 338 | adrput(p->in.left); | |
| 339 | printf(",%s\n", rname(m+1)); | |
| 340 | if(!ISUNSIGNED(p->in.type)) { /* should be MOD */ | |
| 341 | m = getlab(); | |
| 342 | printf("\tjgeq\tL%d\n\tmnegl\t$1,%s\n", m, r); | |
| 343 | deflab(m); | |
| 344 | } | |
| 345 | } | |
| 346 | return; | |
| 347 | ||
| 348 | case 'U': | |
| 349 | /* Truncate int for type conversions: | |
| 350 | LONG|ULONG -> CHAR|UCHAR|SHORT|USHORT | |
| 351 | SHORT|USHORT -> CHAR|UCHAR | |
| 352 | increment offset to correct byte */ | |
| 353 | { | |
| 354 | register NODE *p1; | |
| 355 | int dif; | |
| 356 | ||
| 357 | p1 = p->in.left; | |
| 358 | switch( p1->in.op ){ | |
| 359 | case NAME: | |
| 360 | case OREG: | |
| 361 | dif = tlen(p1)-tlen(p); | |
| 362 | p1->tn.lval += dif; | |
| 363 | adrput(p1); | |
| 364 | p1->tn.lval -= dif; | |
| 365 | return; | |
| 366 | default: | |
| 367 | cerror( "Illegal ZU type conversion" ); | |
| 368 | return; | |
| 369 | } | |
| 370 | } | |
| 371 | ||
| 372 | case 'T': /* rounded structure length for arguments */ | |
| 373 | { | |
| 374 | int size; | |
| 375 | ||
| 376 | size = p->stn.stsize; | |
| 377 | SETOFF( size, 4); | |
| 378 | printf("movab -%d(sp),sp", size); | |
| 379 | return; | |
| 380 | } | |
| 381 | ||
| 382 | case 'S': /* structure assignment */ | |
| 383 | { | |
| 384 | register NODE *l, *r; | |
| 385 | register int size; | |
| 386 | ||
| 387 | if( p->in.op == STASG ){ | |
| 388 | l = p->in.left; | |
| 389 | r = p->in.right; | |
| 390 | ||
| 391 | } | |
| 392 | else if( p->in.op == STARG ){ /* store an arg into a temporary */ | |
| 393 | l = getlr( p, '3' ); | |
| 394 | r = p->in.left; | |
| 395 | } | |
| 396 | else cerror( "STASG bad" ); | |
| 397 | ||
| 398 | if( r->in.op == ICON ) r->in.op = NAME; | |
| 399 | else if( r->in.op == REG ) r->in.op = OREG; | |
| 400 | else if( r->in.op != OREG ) cerror( "STASG-r" ); | |
| 401 | ||
| 402 | size = p->stn.stsize; | |
| 403 | ||
| 404 | if( size <= 0 || size > 65535 ) | |
| 405 | cerror("structure size <0=0 or >65535"); | |
| 7412b41b SL |
406 | /* |
| 407 | * Can't optimize with movw's or movl's here as | |
| 408 | * we don't know the alignment properties of | |
| 409 | * either source or destination (governed, potentially | |
| 410 | * by alignment of enclosing structure/union). | |
| 411 | * (PERHAPS WE COULD SIMULATE dclstruct?) | |
| 412 | */ | |
| 413 | if (size != 1) { | |
| 414 | printf("\tmovab\t"); | |
| 415 | adrput(l); | |
| 416 | printf(",r1\n\tmovab\t"); | |
| 417 | adrput(r); | |
| 418 | printf(",r0\n\tmovl\t$%d,r2\n\tmovblk\n", size); | |
| 419 | rname(2); | |
| 420 | } else { | |
| 421 | printf("\tmovb\t"); | |
| 422 | adrput(r); | |
| 423 | printf(","); | |
| 424 | adrput(l); | |
| 425 | printf("\n"); | |
| f2b49199 | 426 | } |
| f2b49199 SL |
427 | if( r->in.op == NAME ) r->in.op = ICON; |
| 428 | else if( r->in.op == OREG ) r->in.op = REG; | |
| 429 | ||
| 430 | } | |
| 431 | break; | |
| 432 | ||
| 433 | default: | |
| 434 | cerror( "illegal zzzcode" ); | |
| 435 | } | |
| 436 | } | |
| 437 | ||
| 438 | rmove( rt, rs, t ) TWORD t;{ | |
| 439 | printf( " movl %s,%s\n", rname(rs), rname(rt) ); | |
| 440 | if(t==DOUBLE) | |
| 441 | printf( " movl %s,%s\n", rname(rs+1), rname(rt+1) ); | |
| 442 | } | |
| 443 | ||
| 444 | struct respref | |
| 445 | respref[] = { | |
| 446 | INTAREG|INTBREG, INTAREG|INTBREG, | |
| 447 | INAREG|INBREG, INAREG|INBREG|SOREG|STARREG|STARNM|SNAME|SCON, | |
| 448 | INTEMP, INTEMP, | |
| 449 | FORARG, FORARG, | |
| 450 | INTEMP, INTAREG|INAREG|INTBREG|INBREG|SOREG|STARREG|STARNM, | |
| 451 | 0, 0 }; | |
| 452 | ||
| 453 | setregs(){ /* set up temporary registers */ | |
| 454 | fregs = 6; /* tbl- 6 free regs on Tahoe (0-5) */ | |
| 455 | } | |
| 456 | ||
| 457 | szty(t) TWORD t;{ /* size, in registers, needed to hold thing of type t */ | |
| 458 | return(t==DOUBLE ? 2 : 1 ); | |
| 459 | } | |
| 460 | ||
| 461 | rewfld( p ) NODE *p; { | |
| 462 | return(1); | |
| 463 | } | |
| 464 | ||
| 465 | callreg(p) NODE *p; { | |
| 466 | return( R0 ); | |
| 467 | } | |
| 468 | ||
| 469 | base( p ) register NODE *p; { | |
| 470 | register int o = p->in.op; | |
| 471 | ||
| 472 | if( (o==ICON && p->in.name[0] != '\0')) return( 100 ); /* ie no base reg */ | |
| 473 | if( o==REG ) return( p->tn.rval ); | |
| 474 | if( (o==PLUS || o==MINUS) && p->in.left->in.op == REG && p->in.right->in.op==ICON) | |
| 475 | return( p->in.left->tn.rval ); | |
| 476 | if( o==OREG && !R2TEST(p->tn.rval) && (p->in.type==INT || p->in.type==UNSIGNED || ISPTR(p->in.type)) ) | |
| 477 | return( p->tn.rval + 0200*1 ); | |
| 478 | return( -1 ); | |
| 479 | } | |
| 480 | ||
| 481 | offset( p, tyl ) register NODE *p; int tyl; { | |
| 482 | ||
| 483 | if(tyl > 8) return( -1 ); | |
| 484 | if( tyl==1 && p->in.op==REG && (p->in.type==INT || p->in.type==UNSIGNED) ) return( p->tn.rval ); | |
| 485 | if( (p->in.op==LS && p->in.left->in.op==REG && (p->in.left->in.type==INT || p->in.left->in.type==UNSIGNED) && | |
| 486 | (p->in.right->in.op==ICON && p->in.right->in.name[0]=='\0') | |
| 487 | && (1<<p->in.right->tn.lval)==tyl)) | |
| 488 | return( p->in.left->tn.rval ); | |
| 489 | return( -1 ); | |
| 490 | } | |
| 491 | ||
| 492 | makeor2( p, q, b, o) register NODE *p, *q; register int b, o; { | |
| 493 | register NODE *t; | |
| 494 | register int i; | |
| 495 | NODE *f; | |
| 496 | ||
| 497 | p->in.op = OREG; | |
| 498 | f = p->in.left; /* have to free this subtree later */ | |
| 499 | ||
| 500 | /* init base */ | |
| 501 | switch (q->in.op) { | |
| 502 | case ICON: | |
| 503 | case REG: | |
| 504 | case OREG: | |
| 505 | t = q; | |
| 506 | break; | |
| 507 | ||
| 508 | case MINUS: | |
| 509 | q->in.right->tn.lval = -q->in.right->tn.lval; | |
| 510 | case PLUS: | |
| 511 | t = q->in.right; | |
| 512 | break; | |
| 513 | ||
| 514 | case UNARY MUL: | |
| 515 | t = q->in.left->in.left; | |
| 516 | break; | |
| 517 | ||
| 518 | default: | |
| 519 | cerror("illegal makeor2"); | |
| 520 | } | |
| 521 | ||
| 522 | p->tn.lval = t->tn.lval; | |
| 523 | #ifndef FLEXNAMES | |
| 524 | for(i=0; i<NCHNAM; ++i) | |
| 525 | p->in.name[i] = t->in.name[i]; | |
| 526 | #else | |
| 527 | p->in.name = t->in.name; | |
| 528 | #endif | |
| 529 | ||
| 530 | /* init offset */ | |
| 531 | p->tn.rval = R2PACK( (b & 0177), o, (b>>7) ); | |
| 532 | ||
| 533 | tfree(f); | |
| 534 | return; | |
| 535 | } | |
| 536 | ||
| 537 | canaddr( p ) NODE *p; { | |
| 538 | register int o = p->in.op; | |
| 539 | ||
| 540 | if( o==NAME || o==REG || o==ICON || o==OREG || (o==UNARY MUL && shumul(p->in.left)) ) return(1); | |
| 541 | return(0); | |
| 542 | } | |
| 543 | ||
| 544 | shltype( o, p ) register NODE *p; { | |
| 545 | return( o== REG || o == NAME || o == ICON || o == OREG || ( o==UNARY MUL && shumul(p->in.left)) ); | |
| 546 | } | |
| 547 | ||
| 548 | flshape( p ) NODE *p; { | |
| 549 | register int o = p->in.op; | |
| 550 | ||
| 551 | if( o==NAME || o==REG || o==ICON || o==OREG || (o==UNARY MUL && shumul(p->in.left)) ) return(1); | |
| 552 | return(0); | |
| 553 | } | |
| 554 | ||
| 555 | shtemp( p ) register NODE *p; { | |
| 556 | if( p->in.op == STARG ) p = p->in.left; | |
| 557 | return( p->in.op==NAME || p->in.op ==ICON || p->in.op == OREG || (p->in.op==UNARY MUL && shumul(p->in.left)) ); | |
| 558 | } | |
| 559 | ||
| 560 | shumul( p ) register NODE *p; { | |
| 561 | register int o; | |
| 562 | extern int xdebug; | |
| 563 | ||
| 564 | if (xdebug) { | |
| 565 | printf("\nshumul:op=%d,lop=%d,rop=%d", p->in.op, p->in.left->in.op, p->in.right->in.op); | |
| 566 | printf(" prname=%s,plty=%d, prlval=%D\n", p->in.right->in.name, p->in.left->in.type, p->in.right->tn.lval); | |
| 567 | } | |
| 568 | ||
| 569 | o = p->in.op; | |
| 570 | if(( o == NAME || (o == OREG && !R2TEST(p->tn.rval)) || o == ICON ) | |
| 571 | && p->in.type != PTR+DOUBLE) | |
| 572 | return( STARNM ); | |
| 573 | ||
| 574 | return( 0 ); | |
| 575 | } | |
| 576 | ||
| 577 | special( p, shape ) register NODE *p; { | |
| 578 | if( shape==SIREG && p->in.op == OREG && R2TEST(p->tn.rval) ) return(1); | |
| 579 | else return(0); | |
| 580 | } | |
| 581 | ||
| 582 | adrcon( val ) CONSZ val; { | |
| 7412b41b | 583 | printf(ACONFMT, val); |
| f2b49199 SL |
584 | } |
| 585 | ||
| 586 | conput( p ) register NODE *p; { | |
| 587 | switch( p->in.op ){ | |
| 588 | ||
| 589 | case ICON: | |
| 590 | acon( p ); | |
| 591 | return; | |
| 592 | ||
| 593 | case REG: | |
| 594 | printf( "%s", rname(p->tn.rval) ); | |
| 595 | return; | |
| 596 | ||
| 597 | default: | |
| 598 | cerror( "illegal conput" ); | |
| 599 | } | |
| 600 | } | |
| 601 | ||
| 602 | insput( p ) NODE *p; { | |
| 603 | cerror( "insput" ); | |
| 604 | } | |
| 605 | ||
| 606 | upput( p ) register NODE *p; { | |
| 607 | /* output the address of the second long in the | |
| 608 | pair pointed to by p (for DOUBLEs)*/ | |
| 609 | CONSZ save; | |
| 610 | ||
| 611 | if( p->in.op == FLD ){ | |
| 612 | p = p->in.left; | |
| 613 | } | |
| 614 | switch( p->in.op ){ | |
| 615 | ||
| 616 | case NAME: | |
| 617 | case OREG: | |
| 618 | save = p->tn.lval; | |
| 619 | p->tn.lval += SZLONG/SZCHAR; | |
| 620 | adrput(p); | |
| 621 | p->tn.lval = save; | |
| 622 | return; | |
| 623 | ||
| 624 | case REG: | |
| 625 | printf( "%s", rname(p->tn.rval+1) ); | |
| 626 | return; | |
| 627 | ||
| 628 | default: | |
| 629 | cerror( "illegal upper address" ); | |
| 630 | } | |
| 631 | } | |
| 632 | ||
| 633 | adrput( p ) register NODE *p; { | |
| 634 | register int r; | |
| 635 | /* output an address, with offsets, from p */ | |
| 636 | ||
| 637 | if( p->in.op == FLD ){ | |
| 638 | p = p->in.left; | |
| 639 | } | |
| 640 | switch( p->in.op ){ | |
| 641 | ||
| 642 | case NAME: | |
| 643 | acon( p ); | |
| 644 | return; | |
| 645 | ||
| 646 | case ICON: | |
| 647 | /* addressable value of the constant */ | |
| 648 | printf( "$" ); | |
| 649 | acon( p ); | |
| 650 | return; | |
| 651 | ||
| 652 | case REG: | |
| 653 | printf( "%s", rname(p->tn.rval) ); | |
| 654 | if(p->in.type == DOUBLE) /* for entry mask */ | |
| 655 | (void) rname(p->tn.rval+1); | |
| 656 | return; | |
| 657 | ||
| 658 | case OREG: | |
| 659 | r = p->tn.rval; | |
| 660 | if( R2TEST(r) ){ /* double indexing */ | |
| 661 | register int flags; | |
| 662 | ||
| 663 | flags = R2UPK3(r); | |
| 664 | if( flags & 1 ) printf("*"); | |
| 665 | if( p->tn.lval != 0 || p->in.name[0] != '\0' ) acon(p); | |
| 666 | if( R2UPK1(r) != 100) printf( "(%s)", rname(R2UPK1(r)) ); | |
| 667 | printf( "[%s]", rname(R2UPK2(r)) ); | |
| 668 | return; | |
| 669 | } | |
| 670 | if( r == FP && p->tn.lval > 0 ){ /* in the argument region */ | |
| 671 | if( p->in.name[0] != '\0' ) werror( "bad arg temp" ); | |
| 672 | printf( CONFMT, p->tn.lval ); | |
| 673 | printf( "(fp)" ); | |
| 674 | return; | |
| 675 | } | |
| 676 | if( p->tn.lval != 0 || p->in.name[0] != '\0') acon( p ); | |
| 677 | printf( "(%s)", rname(p->tn.rval) ); | |
| 678 | return; | |
| 679 | ||
| 680 | case UNARY MUL: | |
| 681 | /* STARNM or STARREG found */ | |
| 682 | if( tshape(p, STARNM) ) { | |
| 683 | printf( "*" ); | |
| 684 | adrput( p->in.left); | |
| 685 | } | |
| 686 | return; | |
| 687 | ||
| 688 | default: | |
| 689 | cerror( "illegal address" ); | |
| 690 | return; | |
| 691 | ||
| 692 | } | |
| 693 | ||
| 694 | } | |
| 695 | ||
| 696 | acon( p ) register NODE *p; { /* print out a constant */ | |
| 697 | ||
| 698 | if( p->in.name[0] == '\0' ){ | |
| 699 | printf( CONFMT, p->tn.lval); | |
| 700 | } | |
| 701 | else if( p->tn.lval == 0 ) { | |
| 702 | #ifndef FLEXNAMES | |
| 703 | printf( "%.8s", p->in.name ); | |
| 704 | #else | |
| 705 | printf( "%s", p->in.name ); | |
| 706 | #endif | |
| 707 | } | |
| 708 | else { | |
| 709 | #ifndef FLEXNAMES | |
| 710 | printf( "%.8s+", p->in.name ); | |
| 711 | #else | |
| 712 | printf( "%s+", p->in.name ); | |
| 713 | #endif | |
| 714 | printf( CONFMT, p->tn.lval ); | |
| 715 | } | |
| 716 | } | |
| 717 | ||
| 718 | genscall( p, cookie ) register NODE *p; { | |
| 719 | /* structure valued call */ | |
| 720 | return( gencall( p, cookie ) ); | |
| 721 | } | |
| 722 | ||
| 723 | genfcall( p, cookie ) register NODE *p; { | |
| 724 | register NODE *p1; | |
| 725 | register int m; | |
| 726 | static char *funcops[6] = { | |
| 727 | "sin", "cos", "sqrt", "exp", "log", "atan" | |
| 728 | }; | |
| 729 | ||
| 730 | /* generate function opcodes */ | |
| 731 | if(p->in.op==UNARY FORTCALL && p->in.type==FLOAT && | |
| 732 | (p1 = p->in.left)->in.op==ICON && | |
| 733 | p1->tn.lval==0 && p1->in.type==INCREF(FTN|FLOAT)) { | |
| 734 | #ifdef FLEXNAMES | |
| 735 | p1->in.name++; | |
| 736 | #else | |
| 737 | strcpy(p1->in.name, p1->in.name[1]); | |
| 738 | #endif | |
| 739 | for(m=0; m<6; m++) | |
| 740 | if(!strcmp(p1->in.name, funcops[m])) | |
| 741 | break; | |
| 742 | if(m >= 6) | |
| 743 | uerror("no opcode for fortarn function %s", p1->in.name); | |
| 744 | } else | |
| 745 | uerror("illegal type of fortarn function"); | |
| 746 | p1 = p->in.right; | |
| 747 | p->in.op = FORTCALL; | |
| 748 | if(!canaddr(p1)) | |
| 749 | order( p1, INAREG|INBREG|SOREG|STARREG|STARNM ); | |
| 750 | m = match( p, INTAREG|INTBREG ); | |
| 751 | return(m != MDONE); | |
| 752 | } | |
| 753 | ||
| 754 | /* tbl */ | |
| 755 | int gc_numbytes; | |
| 756 | /* tbl */ | |
| 757 | ||
| 758 | gencall( p, cookie ) register NODE *p; { | |
| 759 | /* generate the call given by p */ | |
| 760 | register NODE *p1, *ptemp; | |
| 761 | register int temp, temp1; | |
| 762 | register int m; | |
| 763 | ||
| 764 | if( p->in.right ) temp = argsize( p->in.right ); | |
| 765 | else temp = 0; | |
| 766 | ||
| 767 | if( p->in.op == STCALL || p->in.op == UNARY STCALL ){ | |
| 768 | /* set aside room for structure return */ | |
| 769 | ||
| 770 | if( p->stn.stsize > temp ) temp1 = p->stn.stsize; | |
| 771 | else temp1 = temp; | |
| 772 | } | |
| 773 | ||
| 774 | if( temp > maxargs ) maxargs = temp; | |
| 775 | SETOFF(temp1,4); | |
| 776 | ||
| 777 | if( p->in.right ){ /* make temp node, put offset in, and generate args */ | |
| 778 | ptemp = talloc(); | |
| 779 | ptemp->in.op = OREG; | |
| 780 | ptemp->tn.lval = -1; | |
| 781 | ptemp->tn.rval = SP; | |
| 782 | #ifndef FLEXNAMES | |
| 783 | ptemp->in.name[0] = '\0'; | |
| 784 | #else | |
| 785 | ptemp->in.name = ""; | |
| 786 | #endif | |
| 787 | ptemp->in.rall = NOPREF; | |
| 788 | ptemp->in.su = 0; | |
| 789 | genargs( p->in.right, ptemp ); | |
| 790 | ptemp->in.op = FREE; | |
| 791 | } | |
| 792 | ||
| 793 | p1 = p->in.left; | |
| 794 | if( p1->in.op != ICON ){ | |
| 795 | if( p1->in.op != REG ){ | |
| 796 | if( p1->in.op != OREG || R2TEST(p1->tn.rval) ){ | |
| 797 | if( p1->in.op != NAME ){ | |
| 798 | order( p1, INAREG ); | |
| 799 | } | |
| 800 | } | |
| 801 | } | |
| 802 | } | |
| 803 | ||
| 804 | /* tbl | |
| 805 | setup gc_numbytes so reference to ZC works */ | |
| 806 | ||
| 807 | gc_numbytes = temp&(0x3ff); | |
| 808 | ||
| 809 | p->in.op = UNARY CALL; | |
| 810 | m = match( p, INTAREG|INTBREG ); | |
| 811 | ||
| 812 | return(m != MDONE); | |
| 813 | } | |
| 814 | ||
| 815 | /* tbl */ | |
| 816 | char * | |
| 817 | ccbranches[] = { | |
| 818 | "eql", | |
| 819 | "neq", | |
| 820 | "leq", | |
| 821 | "lss", | |
| 822 | "geq", | |
| 823 | "gtr", | |
| 824 | "lequ", | |
| 825 | "lssu", | |
| 826 | "gequ", | |
| 827 | "gtru", | |
| 828 | }; | |
| 829 | /* tbl */ | |
| 830 | ||
| 831 | cbgen( o, lab, mode ) { /* printf conditional and unconditional branches */ | |
| 832 | ||
| 833 | if(o != 0 && (o < EQ || o > UGT )) | |
| 834 | cerror( "bad conditional branch: %s", opst[o] ); | |
| 835 | printf( " j%s L%d\n", | |
| 836 | o == 0 ? "br" : ccbranches[o-EQ], lab ); | |
| 837 | } | |
| 838 | ||
| 839 | nextcook( p, cookie ) NODE *p; { | |
| 840 | /* we have failed to match p with cookie; try another */ | |
| 841 | if( cookie == FORREW ) return( 0 ); /* hopeless! */ | |
| 842 | if( !(cookie&(INTAREG|INTBREG)) ) return( INTAREG|INTBREG ); | |
| 843 | if( !(cookie&INTEMP) && asgop(p->in.op) ) return( INTEMP|INAREG|INTAREG|INTBREG|INBREG ); | |
| 844 | return( FORREW ); | |
| 845 | } | |
| 846 | ||
| 847 | lastchance( p, cook ) NODE *p; { | |
| 848 | /* forget it! */ | |
| 849 | return(0); | |
| 850 | } | |
| 851 | ||
| 852 | optim2( p ) register NODE *p; { | |
| 853 | # ifdef ONEPASS | |
| 854 | /* do local tree transformations and optimizations */ | |
| 855 | # define RV(p) p->in.right->tn.lval | |
| 856 | register int o = p->in.op; | |
| 857 | register int i; | |
| 858 | ||
| 859 | /* change unsigned mods and divs to logicals (mul is done in mip & c2) */ | |
| 860 | if(optype(o) == BITYPE && ISUNSIGNED(p->in.left->in.type) | |
| 861 | && nncon(p->in.right) && (i=ispow2(RV(p)))>=0){ | |
| 862 | switch(o) { | |
| 863 | case DIV: | |
| 864 | case ASG DIV: | |
| 865 | p->in.op = RS; | |
| 866 | RV(p) = i; | |
| 867 | break; | |
| 868 | case MOD: | |
| 869 | case ASG MOD: | |
| 870 | p->in.op = AND; | |
| 871 | RV(p)--; | |
| 872 | break; | |
| 873 | default: | |
| 874 | return; | |
| 875 | } | |
| 876 | if(asgop(o)) | |
| 877 | p->in.op = ASG p->in.op; | |
| 878 | } | |
| 879 | # endif | |
| 880 | } | |
| 881 | ||
| 882 | struct functbl { | |
| 883 | int fop; | |
| 884 | char *func; | |
| 885 | } opfunc[] = { | |
| 886 | DIV, "udiv", | |
| 887 | ASG DIV, "udiv", | |
| 888 | 0 | |
| 889 | }; | |
| 890 | ||
| 891 | hardops(p) register NODE *p; { | |
| 892 | /* change hard to do operators into function calls. */ | |
| 893 | register NODE *q; | |
| 894 | register struct functbl *f; | |
| 895 | register int o; | |
| 896 | register TWORD t, t1, t2; | |
| 897 | ||
| 898 | o = p->in.op; | |
| 899 | ||
| 900 | for( f=opfunc; f->fop; f++ ) { | |
| 901 | if( o==f->fop ) goto convert; | |
| 902 | } | |
| 903 | return; | |
| 904 | ||
| 905 | convert: | |
| 906 | t = p->in.type; | |
| 907 | t1 = p->in.left->in.type; | |
| 908 | t2 = p->in.right->in.type; | |
| 909 | if ( t1 != UNSIGNED && (t2 != UNSIGNED)) return; | |
| 910 | ||
| 911 | /* need to rewrite tree for ASG OP */ | |
| 912 | /* must change ASG OP to a simple OP */ | |
| 913 | if( asgop( o ) ) { | |
| 914 | q = talloc(); | |
| 915 | q->in.op = NOASG ( o ); | |
| 916 | q->in.rall = NOPREF; | |
| 917 | q->in.type = p->in.type; | |
| 918 | q->in.left = tcopy(p->in.left); | |
| 919 | q->in.right = p->in.right; | |
| 920 | p->in.op = ASSIGN; | |
| 921 | p->in.right = q; | |
| 922 | zappost(q->in.left); /* remove post-INCR(DECR) from new node */ | |
| 923 | fixpre(q->in.left); /* change pre-INCR(DECR) to +/- */ | |
| 924 | p = q; | |
| 925 | ||
| 926 | } | |
| 927 | /* turn logicals to compare 0 */ | |
| 928 | else if( logop( o ) ) { | |
| 929 | ncopy(q = talloc(), p); | |
| 930 | p->in.left = q; | |
| 931 | p->in.right = q = talloc(); | |
| 932 | q->in.op = ICON; | |
| 933 | q->in.type = INT; | |
| 934 | #ifndef FLEXNAMES | |
| 935 | q->in.name[0] = '\0'; | |
| 936 | #else | |
| 937 | q->in.name = ""; | |
| 938 | #endif | |
| 939 | q->tn.lval = 0; | |
| 940 | q->tn.rval = 0; | |
| 941 | p = p->in.left; | |
| 942 | } | |
| 943 | ||
| 944 | /* build comma op for args to function */ | |
| 945 | t1 = p->in.left->in.type; | |
| 946 | t2 = 0; | |
| 947 | if ( optype(p->in.op) == BITYPE) { | |
| 948 | q = talloc(); | |
| 949 | q->in.op = CM; | |
| 950 | q->in.rall = NOPREF; | |
| 951 | q->in.type = INT; | |
| 952 | q->in.left = p->in.left; | |
| 953 | q->in.right = p->in.right; | |
| 954 | t2 = p->in.right->in.type; | |
| 955 | } else | |
| 956 | q = p->in.left; | |
| 957 | ||
| 958 | p->in.op = CALL; | |
| 959 | p->in.right = q; | |
| 960 | ||
| 961 | /* put function name in left node of call */ | |
| 962 | p->in.left = q = talloc(); | |
| 963 | q->in.op = ICON; | |
| 964 | q->in.rall = NOPREF; | |
| 965 | q->in.type = INCREF( FTN + p->in.type ); | |
| 966 | #ifndef FLEXNAMES | |
| 967 | strcpy( q->in.name, f->func ); | |
| 968 | #else | |
| 969 | q->in.name = f->func; | |
| 970 | #endif | |
| 971 | q->tn.lval = 0; | |
| 972 | q->tn.rval = 0; | |
| 973 | ||
| 974 | } | |
| 975 | ||
| 976 | zappost(p) NODE *p; { | |
| 977 | /* look for ++ and -- operators and remove them */ | |
| 978 | ||
| 979 | register int o, ty; | |
| 980 | register NODE *q; | |
| 981 | o = p->in.op; | |
| 982 | ty = optype( o ); | |
| 983 | ||
| 984 | switch( o ){ | |
| 985 | ||
| 986 | case INCR: | |
| 987 | case DECR: | |
| 988 | q = p->in.left; | |
| 989 | p->in.right->in.op = FREE; /* zap constant */ | |
| 990 | ncopy( p, q ); | |
| 991 | q->in.op = FREE; | |
| 992 | return; | |
| 993 | ||
| 994 | } | |
| 995 | ||
| 996 | if( ty == BITYPE ) zappost( p->in.right ); | |
| 997 | if( ty != LTYPE ) zappost( p->in.left ); | |
| 998 | } | |
| 999 | ||
| 1000 | fixpre(p) NODE *p; { | |
| 1001 | ||
| 1002 | register int o, ty; | |
| 1003 | o = p->in.op; | |
| 1004 | ty = optype( o ); | |
| 1005 | ||
| 1006 | switch( o ){ | |
| 1007 | ||
| 1008 | case ASG PLUS: | |
| 1009 | p->in.op = PLUS; | |
| 1010 | break; | |
| 1011 | case ASG MINUS: | |
| 1012 | p->in.op = MINUS; | |
| 1013 | break; | |
| 1014 | } | |
| 1015 | ||
| 1016 | if( ty == BITYPE ) fixpre( p->in.right ); | |
| 1017 | if( ty != LTYPE ) fixpre( p->in.left ); | |
| 1018 | } | |
| 1019 | ||
| 1020 | NODE * addroreg(l) NODE *l; | |
| 1021 | /* OREG was built in clocal() | |
| 1022 | * for an auto or formal parameter | |
| 1023 | * now its address is being taken | |
| 1024 | * local code must unwind it | |
| 1025 | * back to PLUS/MINUS REG ICON | |
| 1026 | * according to local conventions | |
| 1027 | */ | |
| 1028 | { | |
| 1029 | cerror("address of OREG taken"); | |
| 1030 | } | |
| 1031 | ||
| 1032 | # ifndef ONEPASS | |
| 1033 | main( argc, argv ) char *argv[]; { | |
| 1034 | return( mainp2( argc, argv ) ); | |
| 1035 | } | |
| 1036 | # endif | |
| 1037 | ||
| 1038 | myreader(p) register NODE *p; { | |
| 1039 | walkf( p, hardops ); /* convert ops to function calls */ | |
| 1040 | canon( p ); /* expands r-vals for fileds */ | |
| 1041 | walkf( p, optim2 ); | |
| 1042 | } |