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1.1 root 1: static char *sccsid ="%W% (Berkeley) %G%";
2: # include "mfile2"
3: # include "ctype.h"
4: # ifdef FORT
5: int ftlab1, ftlab2;
6: /* a lot of the machine dependent parts of the second pass */
7:
8: # define BITMASK(n) ((1L<<n)-1)
9:
10: where(c){
11: fprintf( stderr, "%s, line %d: ", filename, lineno );
12: }
13:
14: lineid( l, fn ) char *fn; {
15: /* identify line l and file fn */
16: printf( "# line %d, file %s\n", l, fn );
17: }
18:
19:
20: eobl2(){
21: OFFSZ spoff; /* offset from stack pointer */
22: #ifdef FORT
23: spoff = maxoff;
24: if( spoff >= AUTOINIT ) spoff -= AUTOINIT;
25: spoff /= SZCHAR;
26: SETOFF(spoff,4);
27: #ifndef FLEXNAMES
28: printf( " .set .F%d,%ld\n", ftnno, spoff );
29: #else
30: /* SHOULD BE L%d ... ftnno but must change pc/f77 */
31: printf( " .set LF%d,%ld\n", ftnno, spoff );
32: #endif
33: #else
34: extern int ftlab1, ftlab2;
35:
36: spoff = maxoff;
37: if( spoff >= AUTOINIT ) spoff -= AUTOINIT;
38: spoff /= SZCHAR;
39: SETOFF(spoff,4);
40: printf( "L%d:\n", ftlab1);
41: if( spoff!=0 )
42: if( spoff < 64 )
43: printf( " subl2 $%ld,sp\n", spoff);
44: else
45: printf( " movab -%ld(sp),sp\n", spoff);
46: printf( " jbr L%d\n", ftlab2);
47: #endif
48: maxargs = -1;
49: }
50:
51: struct hoptab { int opmask; char * opstring; } ioptab[] = {
52:
53: ASG PLUS, "add",
54: ASG MINUS, "sub",
55: ASG MUL, "mul",
56: ASG DIV, "div",
57: ASG OR, "bis",
58: ASG ER, "xor",
59: ASG AND, "bic",
60: PLUS, "add",
61: MINUS, "sub",
62: MUL, "mul",
63: DIV, "div",
64: OR, "bis",
65: ER, "xor",
66: AND, "bic",
67: -1, "" };
68:
69: hopcode( f, o ){
70: /* output the appropriate string from the above table */
71:
72: register struct hoptab *q;
73:
74: for( q = ioptab; q->opmask>=0; ++q ){
75: if( q->opmask == o ){
76: printf( "%s", q->opstring );
77: /* tbl
78: if( f == 'F' ) printf( "e" );
79: else if( f == 'D' ) printf( "d" );
80: tbl */
81: /* tbl */
82: switch( f ) {
83: case 'L':
84: case 'W':
85: case 'B':
86: case 'D':
87: case 'F':
88: printf("%c", tolower(f));
89: break;
90:
91: }
92: /* tbl */
93: return;
94: }
95: }
96: cerror( "no hoptab for %s", opst[o] );
97: }
98:
99: char *
100: rnames[] = { /* keyed to register number tokens */
101:
102: "r0", "r1",
103: "r2", "r3", "r4", "r5",
104: "r6", "r7", "r8", "r9", "r10", "r11",
105: "ap", "fp", "sp", "pc",
106:
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:
117: tlen(p) NODE *p;
118: {
119: switch(p->in.type) {
120: case CHAR:
121: case UCHAR:
122: return(1);
123:
124: case SHORT:
125: case USHORT:
126: return(2);
127:
128: case DOUBLE:
129: return(8);
130:
131: default:
132: return(4);
133: }
134: }
135:
136: mixtypes(p, q) NODE *p, *q;
137: {
138: register tp, tq;
139:
140: tp = p->in.type;
141: tq = q->in.type;
142:
143: return( (tp==FLOAT || tp==DOUBLE) !=
144: (tq==FLOAT || tq==DOUBLE) );
145: }
146:
147: prtype(n) NODE *n;
148: {
149: switch (n->in.type)
150: {
151: case DOUBLE:
152: printf("d");
153: return;
154:
155: case FLOAT:
156: printf("f");
157: return;
158:
159: case LONG:
160: case ULONG:
161: case INT:
162: case UNSIGNED:
163: printf("l");
164: return;
165:
166: case SHORT:
167: case USHORT:
168: printf("w");
169: return;
170:
171: case CHAR:
172: case UCHAR:
173: printf("b");
174: return;
175:
176: default:
177: if ( !ISPTR( n->in.type ) ) cerror("zzzcode- bad type");
178: else {
179: printf("l");
180: return;
181: }
182: }
183: }
184:
185: zzzcode( p, c ) register NODE *p; {
186: register m;
187: CONSZ val;
188: switch( c ){
189:
190: case 'N': /* logical ops, turned into 0-1 */
191: /* use register given by register 1 */
192: cbgen( 0, m=getlab(), 'I' );
193: deflab( p->bn.label );
194: printf( " clrl %s\n", rnames[getlr( p, '1' )->tn.rval] );
195: deflab( m );
196: return;
197:
198: case 'I':
199: case 'P':
200: cbgen( p->in.op, p->bn.label, c );
201: return;
202:
203: case 'A':
204: {
205: register NODE *l, *r;
206:
207: if (xdebug) eprint(p, 0, &val, &val);
208: r = getlr(p, 'R');
209: if (optype(p->in.op) == LTYPE || p->in.op == UNARY MUL)
210: {
211: l = resc;
212: l->in.type = (r->in.type==FLOAT || r->in.type==DOUBLE ? DOUBLE : INT);
213: }
214: else
215: l = getlr(p, 'L');
216: if (r->in.op == ICON)
217: if(r->in.name[0] == '\0')
218: {
219: if (r->tn.lval == 0)
220: {
221: printf("clr");
222: prtype(l);
223: printf(" ");
224: adrput(l);
225: return;
226: }
227: if (r->tn.lval < 0 && r->tn.lval >= -63)
228: {
229: printf("mneg");
230: prtype(l);
231: r->tn.lval = -r->tn.lval;
232: goto ops;
233: }
234: r->in.type = (r->tn.lval < 0 ?
235: (r->tn.lval >= -128 ? CHAR
236: : (r->tn.lval >= -32768 ? SHORT
237: : INT )) : r->in.type);
238: r->in.type = (r->tn.lval >= 0 ?
239: (r->tn.lval <= 63 ? INT
240: : ( r->tn.lval <= 127 ? CHAR
241: : (r->tn.lval <= 255 ? UCHAR
242: : (r->tn.lval <= 32767 ? SHORT
243: : (r->tn.lval <= 65535 ? USHORT
244: : INT ))))) : r->in.type );
245: }
246: else
247: {
248: printf("moval");
249: printf(" ");
250: acon(r);
251: printf(",");
252: adrput(l);
253: return;
254: }
255:
256: if (l->in.op == REG && l->in.type != FLOAT && l->in.type != DOUBLE)
257: {
258: if( tlen(l) < tlen(r) )
259: {
260: if (!mixtypes(l,r))
261: {
262: !ISUNSIGNED(l->in.type)?
263: printf("cvt"):
264: printf("movz");
265: prtype(l);
266: printf("l");
267: goto ops;
268: }
269: else
270: {
271: printf("cvt");
272: prtype(r);
273: prtype(l);
274: printf(" ");
275: adrput(r);
276: printf(",");
277: adrput(l);
278: printf("cvt");
279: prtype(l);
280: printf("l");
281: printf(" ");
282: adrput(l);
283: printf(",");
284: adrput(l);
285: return;
286: }
287: }
288: else
289: {
290: l->in.type = INT;
291: }
292: }
293: if (!mixtypes(l,r))
294: {
295: if (tlen(l) == tlen(r))
296: {
297: int x = r->in.type;
298: printf("mov");
299: if (BTYPE(x)==STRTY && !ISPTR(x))
300: printf("a");
301: prtype(l);
302: goto ops;
303: }
304: else if (tlen(l) > tlen(r) && ISUNSIGNED(r->in.type))
305: {
306: printf("movz");
307: }
308: else
309: {
310: printf("cvt");
311: }
312: }
313: else
314: {
315: printf("cvt");
316: }
317: prtype(r);
318: prtype(l);
319: ops:
320: printf(" ");
321: adrput(r);
322: printf(",");
323: adrput(l);
324: return;
325: }
326:
327: case 'B': /* get oreg value in temp register for left shift */
328: {
329: register NODE *r;
330: if (xdebug) eprint(p, 0, &val, &val);
331: r = p->in.right;
332: if( tlen(r) == sizeof(int) && r->in.type != FLOAT )
333: printf("movl");
334: else {
335: printf("cvt");
336: prtype(r);
337: printf("l");
338: }
339: return;
340: }
341:
342: case 'C': /* num words pushed on arg stack */
343: {
344: extern int gc_numbytes;
345: extern int xdebug;
346:
347: if (xdebug) printf("->%d<-",gc_numbytes);
348:
349: printf("$%d", gc_numbytes/(SZLONG/SZCHAR) );
350: return;
351: }
352:
353: case 'D': /* INCR and DECR */
354: zzzcode(p->in.left, 'A');
355: printf("\n ");
356:
357: case 'E': /* INCR and DECR, FOREFF */
358: if (p->in.right->tn.lval == 1)
359: {
360: printf("%s", (p->in.op == INCR ? "inc" : "dec") );
361: prtype(p->in.left);
362: printf(" ");
363: adrput(p->in.left);
364: return;
365: }
366: printf("%s", (p->in.op == INCR ? "add" : "sub") );
367: prtype(p->in.left);
368: printf("2 ");
369: adrput(p->in.right);
370: printf(",");
371: adrput(p->in.left);
372: return;
373:
374: case 'F': /* register type of right operand */
375: {
376: register NODE *n;
377: extern int xdebug;
378: register int ty;
379:
380: n = getlr( p, 'R' );
381: ty = n->in.type;
382:
383: if (xdebug) printf("->%d<-", ty);
384:
385: if ( ty==DOUBLE) printf("d");
386: else if ( ty==FLOAT ) printf("f");
387: else printf("l");
388: return;
389: }
390:
391: case 'L': /* type of left operand */
392: case 'R': /* type of right operand */
393: {
394: register NODE *n;
395: extern int xdebug;
396:
397: n = getlr ( p, c);
398: if (xdebug) printf("->%d<-", n->in.type);
399:
400: prtype(n);
401: return;
402: }
403:
404: case 'Z': /* complement mask for bit instr */
405: printf("$%ld", ~p->in.right->tn.lval);
406: return;
407:
408: case 'U': /* 32 - n, for unsigned right shifts */
409: printf("$%d", 32 - p->in.right->tn.lval );
410: return;
411:
412: case 'T': /* rounded structure length for arguments */
413: {
414: int size;
415:
416: size = p->stn.stsize;
417: SETOFF( size, 4);
418: printf("$%d", size);
419: return;
420: }
421:
422: case 'S': /* structure assignment */
423: {
424: register NODE *l, *r;
425: register size;
426:
427: if( p->in.op == STASG ){
428: l = p->in.left;
429: r = p->in.right;
430:
431: }
432: else if( p->in.op == STARG ){ /* store an arg into a temporary */
433: l = getlr( p, '3' );
434: r = p->in.left;
435: }
436: else cerror( "STASG bad" );
437:
438: if( r->in.op == ICON ) r->in.op = NAME;
439: else if( r->in.op == REG ) r->in.op = OREG;
440: else if( r->in.op != OREG ) cerror( "STASG-r" );
441:
442: size = p->stn.stsize;
443:
444: if( size <= 0 || size > 65535 )
445: cerror("structure size <0=0 or >65535");
446:
447: switch(size) {
448: case 1:
449: printf(" movb ");
450: break;
451: case 2:
452: printf(" movw ");
453: break;
454: case 4:
455: printf(" movl ");
456: break;
457: case 8:
458: printf(" movq ");
459: break;
460: default:
461: printf(" movc3 $%d,", size);
462: break;
463: }
464: adrput(r);
465: printf(",");
466: adrput(l);
467: printf("\n");
468:
469: if( r->in.op == NAME ) r->in.op = ICON;
470: else if( r->in.op == OREG ) r->in.op = REG;
471:
472: }
473: break;
474:
475: default:
476: cerror( "illegal zzzcode" );
477: }
478: }
479:
480: rmove( rt, rs, t ){
481: printf( " %s %s,%s\n",
482: (t==FLOAT ? "movf" : (t==DOUBLE ? "movd" : "movl")),
483: rnames[rs], rnames[rt] );
484: }
485:
486: struct respref
487: respref[] = {
488: INTAREG|INTBREG, INTAREG|INTBREG,
489: INAREG|INBREG, INAREG|INBREG|SOREG|STARREG|STARNM|SNAME|SCON,
490: INTEMP, INTEMP,
491: FORARG, FORARG,
492: INTEMP, INTAREG|INAREG|INTBREG|INBREG|SOREG|STARREG|STARNM,
493: 0, 0 };
494:
495: setregs(){ /* set up temporary registers */
496: fregs = 6; /* tbl- 6 free regs on VAX (0-5) */
497: ;
498: }
499:
500: szty(t){ /* size, in registers, needed to hold thing of type t */
501: return( (t==DOUBLE||t==FLOAT) ? 2 : 1 );
502: }
503:
504: rewfld( p ) NODE *p; {
505: return(1);
506: }
507:
508: callreg(p) NODE *p; {
509: return( R0 );
510: }
511:
512: base( p ) register NODE *p; {
513: register int o = p->in.op;
514:
515: if( (o==ICON && p->in.name[0] != '\0')) return( 100 ); /* ie no base reg */
516: if( o==REG ) return( p->tn.rval );
517: if( (o==PLUS || o==MINUS) && p->in.left->in.op == REG && p->in.right->in.op==ICON)
518: return( p->in.left->tn.rval );
519: if( o==OREG && !R2TEST(p->tn.rval) && (p->in.type==INT || p->in.type==UNSIGNED || ISPTR(p->in.type)) )
520: return( p->tn.rval + 0200*1 );
521: if( o==INCR && p->in.left->in.op==REG ) return( p->in.left->tn.rval + 0200*2 );
522: if( o==ASG MINUS && p->in.left->in.op==REG) return( p->in.left->tn.rval + 0200*4 );
523: if( o==UNARY MUL && p->in.left->in.op==INCR && p->in.left->in.left->in.op==REG
524: && (p->in.type==INT || p->in.type==UNSIGNED || ISPTR(p->in.type)) )
525: return( p->in.left->in.left->tn.rval + 0200*(1+2) );
526: return( -1 );
527: }
528:
529: offset( p, tyl ) register NODE *p; int tyl; {
530:
531: if( tyl==1 && p->in.op==REG && (p->in.type==INT || p->in.type==UNSIGNED) ) return( p->tn.rval );
532: if( (p->in.op==LS && p->in.left->in.op==REG && (p->in.left->in.type==INT || p->in.left->in.type==UNSIGNED) &&
533: (p->in.right->in.op==ICON && p->in.right->in.name[0]=='\0')
534: && (1<<p->in.right->tn.lval)==tyl))
535: return( p->in.left->tn.rval );
536: return( -1 );
537: }
538:
539: makeor2( p, q, b, o) register NODE *p, *q; register int b, o; {
540: register NODE *t;
541: register int i;
542: NODE *f;
543:
544: p->in.op = OREG;
545: f = p->in.left; /* have to free this subtree later */
546:
547: /* init base */
548: switch (q->in.op) {
549: case ICON:
550: case REG:
551: case OREG:
552: t = q;
553: break;
554:
555: case MINUS:
556: q->in.right->tn.lval = -q->in.right->tn.lval;
557: case PLUS:
558: t = q->in.right;
559: break;
560:
561: case INCR:
562: case ASG MINUS:
563: t = q->in.left;
564: break;
565:
566: case UNARY MUL:
567: t = q->in.left->in.left;
568: break;
569:
570: default:
571: cerror("illegal makeor2");
572: }
573:
574: p->tn.lval = t->tn.lval;
575: #ifndef FLEXNAMES
576: for(i=0; i<NCHNAM; ++i)
577: p->in.name[i] = t->in.name[i];
578: #else
579: p->in.name = t->in.name;
580: #endif
581:
582: /* init offset */
583: p->tn.rval = R2PACK( (b & 0177), o, (b>>7) );
584:
585: tfree(f);
586: return;
587: }
588:
589: canaddr( p ) NODE *p; {
590: register int o = p->in.op;
591:
592: if( o==NAME || o==REG || o==ICON || o==OREG || (o==UNARY MUL && shumul(p->in.left)) ) return(1);
593: return(0);
594: }
595:
596: shltype( o, p ) register NODE *p; {
597: return( o== REG || o == NAME || o == ICON || o == OREG || ( o==UNARY MUL && shumul(p->in.left)) );
598: }
599:
600: flshape( p ) register NODE *p; {
601: return( p->in.op == REG || p->in.op == NAME || p->in.op == ICON ||
602: (p->in.op == OREG && (!R2TEST(p->tn.rval) || tlen(p) == 1)) );
603: }
604:
605: shtemp( p ) register NODE *p; {
606: if( p->in.op == STARG ) p = p->in.left;
607: return( p->in.op==NAME || p->in.op ==ICON || p->in.op == OREG || (p->in.op==UNARY MUL && shumul(p->in.left)) );
608: }
609:
610: shumul( p ) register NODE *p; {
611: register o;
612: extern int xdebug;
613:
614: if (xdebug) {
615: printf("\nshumul:op=%d,lop=%d,rop=%d", p->in.op, p->in.left->in.op, p->in.right->in.op);
616: printf(" prname=%s,plty=%d, prlval=%D\n", p->in.right->in.name, p->in.left->in.type, p->in.right->tn.lval);
617: }
618:
619:
620: o = p->in.op;
621: if( o == NAME || (o == OREG && !R2TEST(p->tn.rval)) || o == ICON ) return( STARNM );
622:
623: if( ( o == INCR || o == ASG MINUS ) &&
624: ( p->in.left->in.op == REG && p->in.right->in.op == ICON ) &&
625: p->in.right->in.name[0] == '\0' )
626: {
627: switch (p->in.left->in.type)
628: {
629: case CHAR|PTR:
630: case UCHAR|PTR:
631: o = 1;
632: break;
633:
634: case SHORT|PTR:
635: case USHORT|PTR:
636: o = 2;
637: break;
638:
639: case INT|PTR:
640: case UNSIGNED|PTR:
641: case LONG|PTR:
642: case ULONG|PTR:
643: case FLOAT|PTR:
644: o = 4;
645: break;
646:
647: case DOUBLE|PTR:
648: o = 8;
649: break;
650:
651: default:
652: if ( ISPTR(p->in.left->in.type) ) {
653: o = 4;
654: break;
655: }
656: else return(0);
657: }
658: return( p->in.right->tn.lval == o ? STARREG : 0);
659: }
660:
661: return( 0 );
662: }
663:
664: adrcon( val ) CONSZ val; {
665: printf( "$" );
666: printf( CONFMT, val );
667: }
668:
669: conput( p ) register NODE *p; {
670: switch( p->in.op ){
671:
672: case ICON:
673: acon( p );
674: return;
675:
676: case REG:
677: printf( "%s", rnames[p->tn.rval] );
678: return;
679:
680: default:
681: cerror( "illegal conput" );
682: }
683: }
684:
685: insput( p ) register NODE *p; {
686: cerror( "insput" );
687: }
688:
689: upput( p ) register NODE *p; {
690: cerror( "upput" );
691: }
692:
693: adrput( p ) register NODE *p; {
694: register int r;
695: /* output an address, with offsets, from p */
696:
697: if( p->in.op == FLD ){
698: p = p->in.left;
699: }
700: switch( p->in.op ){
701:
702: case NAME:
703: acon( p );
704: return;
705:
706: case ICON:
707: /* addressable value of the constant */
708: printf( "$" );
709: acon( p );
710: return;
711:
712: case REG:
713: printf( "%s", rnames[p->tn.rval] );
714: return;
715:
716: case OREG:
717: r = p->tn.rval;
718: if( R2TEST(r) ){ /* double indexing */
719: register int flags;
720:
721: flags = R2UPK3(r);
722: if( flags & 1 ) printf("*");
723: if( flags & 4 ) printf("-");
724: if( p->tn.lval != 0 || p->in.name[0] != '\0' ) acon(p);
725: if( R2UPK1(r) != 100) printf( "(%s)", rnames[R2UPK1(r)] );
726: if( flags & 2 ) printf("+");
727: printf( "[%s]", rnames[R2UPK2(r)] );
728: return;
729: }
730: if( r == AP ){ /* in the argument region */
731: if( p->tn.lval <= 0 || p->in.name[0] != '\0' ) werror( "bad arg temp" );
732: printf( CONFMT, p->tn.lval );
733: printf( "(ap)" );
734: return;
735: }
736: if( p->tn.lval != 0 || p->in.name[0] != '\0') acon( p );
737: printf( "(%s)", rnames[p->tn.rval] );
738: return;
739:
740: case UNARY MUL:
741: /* STARNM or STARREG found */
742: if( tshape(p, STARNM) ) {
743: printf( "*" );
744: adrput( p->in.left);
745: }
746: else { /* STARREG - really auto inc or dec */
747: register NODE *q;
748:
749: /* tbl
750: p = p->in.left;
751: p->in.left->in.op = OREG;
752: if( p->in.op == INCR ) {
753: adrput( p->in.left );
754: printf( "+" );
755: }
756: else {
757: printf( "-" );
758: adrput( p->in.left );
759: }
760: tbl */
761: printf("%s(%s)%s", (p->in.left->in.op==INCR ? "" : "-"),
762: rnames[p->in.left->in.left->tn.rval],
763: (p->in.left->in.op==INCR ? "+" : "") );
764: p->in.op = OREG;
765: p->tn.rval = p->in.left->in.left->tn.rval;
766: q = p->in.left;
767: p->tn.lval = (p->in.left->in.op == INCR ? -p->in.left->in.right->tn.lval : 0);
768: #ifndef FLEXNAMES
769: p->in.name[0] = '\0';
770: #else
771: p->in.name = "";
772: #endif
773: tfree(q);
774: }
775: return;
776:
777: default:
778: cerror( "illegal address" );
779: return;
780:
781: }
782:
783: }
784:
785: acon( p ) register NODE *p; { /* print out a constant */
786:
787: if( p->in.name[0] == '\0' ){
788: printf( CONFMT, p->tn.lval);
789: }
790: else if( p->tn.lval == 0 ) {
791: #ifndef FLEXNAMES
792: printf( "%.8s", p->in.name );
793: #else
794: printf( "%s", p->in.name );
795: #endif
796: }
797: else {
798: #ifndef FLEXNAMES
799: printf( "%.8s+", p->in.name );
800: #else
801: printf( "%s+", p->in.name );
802: #endif
803: printf( CONFMT, p->tn.lval );
804: }
805: }
806:
807: /*
808: aacon( p ) register NODE *p; { /* print out a constant */
809: /*
810:
811: if( p->in.name[0] == '\0' ){
812: printf( CONFMT, p->tn.lval);
813: return( 0 );
814: }
815: else if( p->tn.lval == 0 ) {
816: #ifndef FLEXNAMES
817: printf( "$%.8s", p->in.name );
818: #else
819: printf( "$%s", p->in.name );
820: #endif
821: return( 1 );
822: }
823: else {
824: printf( "$(" );
825: printf( CONFMT, p->tn.lval );
826: printf( "+" );
827: #ifndef FLEXNAMES
828: printf( "%.8s)", p->in.name );
829: #else
830: printf( "%s)", p->in.name );
831: #endif
832: return(1);
833: }
834: }
835: */
836:
837: genscall( p, cookie ) register NODE *p; {
838: /* structure valued call */
839: return( gencall( p, cookie ) );
840: }
841:
842: /* tbl */
843: int gc_numbytes;
844: /* tbl */
845:
846: gencall( p, cookie ) register NODE *p; {
847: /* generate the call given by p */
848: register NODE *p1, *ptemp;
849: register temp, temp1;
850: register m;
851:
852: if( p->in.right ) temp = argsize( p->in.right );
853: else temp = 0;
854:
855: if( p->in.op == STCALL || p->in.op == UNARY STCALL ){
856: /* set aside room for structure return */
857:
858: if( p->stn.stsize > temp ) temp1 = p->stn.stsize;
859: else temp1 = temp;
860: }
861:
862: if( temp > maxargs ) maxargs = temp;
863: SETOFF(temp1,4);
864:
865: if( p->in.right ){ /* make temp node, put offset in, and generate args */
866: ptemp = talloc();
867: ptemp->in.op = OREG;
868: ptemp->tn.lval = -1;
869: ptemp->tn.rval = SP;
870: #ifndef FLEXNAMES
871: ptemp->in.name[0] = '\0';
872: #else
873: ptemp->in.name = "";
874: #endif
875: ptemp->in.rall = NOPREF;
876: ptemp->in.su = 0;
877: genargs( p->in.right, ptemp );
878: ptemp->in.op = FREE;
879: }
880:
881: p1 = p->in.left;
882: if( p1->in.op != ICON ){
883: if( p1->in.op != REG ){
884: if( p1->in.op != OREG || R2TEST(p1->tn.rval) ){
885: if( p1->in.op != NAME ){
886: order( p1, INAREG );
887: }
888: }
889: }
890: }
891:
892: /*
893: if( p1->in.op == REG && p->tn.rval == R5 ){
894: cerror( "call register overwrite" );
895: }
896: */
897: /* tbl
898: setup gc_numbytes so reference to ZC works */
899:
900: gc_numbytes = temp;
901: /* tbl */
902:
903: p->in.op = UNARY CALL;
904: m = match( p, INTAREG|INTBREG );
905: /* tbl
906: switch( temp ) {
907: case 0:
908: break;
909: case 2:
910: printf( " tst (sp)+\n" );
911: break;
912: case 4:
913: printf( " cmp (sp)+,(sp)+\n" );
914: break;
915: default:
916: printf( " add $%d,sp\n", temp);
917: }
918: tbl */
919: return(m != MDONE);
920: }
921:
922: /* tbl */
923: char *
924: ccbranches[] = {
925: " jeql L%d\n",
926: " jneq L%d\n",
927: " jleq L%d\n",
928: " jlss L%d\n",
929: " jgeq L%d\n",
930: " jgtr L%d\n",
931: " jlequ L%d\n",
932: " jlssu L%d\n",
933: " jgequ L%d\n",
934: " jgtru L%d\n",
935: };
936: /* tbl */
937:
938: cbgen( o, lab, mode ) { /* printf conditional and unconditional branches */
939:
940: /* tbl */
941: if( o == 0 ) printf( " jbr L%d\n", lab );
942: /* tbl */
943: else {
944: if( o > UGT ) cerror( "bad conditional branch: %s", opst[o] );
945: printf( ccbranches[o-EQ], lab );
946: }
947: }
948:
949: nextcook( p, cookie ) NODE *p; {
950: /* we have failed to match p with cookie; try another */
951: if( cookie == FORREW ) return( 0 ); /* hopeless! */
952: if( !(cookie&(INTAREG|INTBREG)) ) return( INTAREG|INTBREG );
953: if( !(cookie&INTEMP) && asgop(p->in.op) ) return( INTEMP|INAREG|INTAREG|INTBREG|INBREG );
954: return( FORREW );
955: }
956:
957: lastchance( p, cook ) NODE *p; {
958: /* forget it! */
959: return(0);
960: }
961:
962: optim2( p ) register NODE *p; {
963: /* do local tree transformations and optimizations */
964:
965: register NODE *r;
966:
967: switch( p->in.op ) {
968:
969: case AND:
970: /* commute L and R to eliminate compliments and constants */
971: if( (p->in.left->in.op==ICON&&p->in.left->in.name[0]==0) || p->in.left->in.op==COMPL ) {
972: r = p->in.left;
973: p->in.left = p->in.right;
974: p->in.right = r;
975: }
976: case ASG AND:
977: /* change meaning of AND to ~R&L - bic on pdp11 */
978: r = p->in.right;
979: if( r->in.op==ICON && r->in.name[0]==0 ) { /* compliment constant */
980: r->tn.lval = ~r->tn.lval;
981: }
982: else if( r->in.op==COMPL ) { /* ~~A => A */
983: r->in.op = FREE;
984: p->in.right = r->in.left;
985: }
986: else { /* insert complement node */
987: p->in.right = talloc();
988: p->in.right->in.op = COMPL;
989: p->in.right->in.rall = NOPREF;
990: p->in.right->in.type = r->in.type;
991: p->in.right->in.left = r;
992: p->in.right->in.right = NULL;
993: }
994: break;
995:
996: }
997: }
998:
999: NODE * addroreg(l)
1000: /* OREG was built in clocal()
1001: * for an auto or formal parameter
1002: * now its address is being taken
1003: * local code must unwind it
1004: * back to PLUS/MINUS REG ICON
1005: * according to local conventions
1006: */
1007: {
1008: cerror("address of OREG taken");
1009: }
1010:
1011:
1012:
1013: # ifndef ONEPASS
1014: main( argc, argv ) char *argv[]; {
1015: return( mainp2( argc, argv ) );
1016: }
1017: # endif
1018:
1019:
1020: /* added by jwf */
1021: struct functbl {
1022: int fop;
1023: TWORD ftype;
1024: char *func;
1025: } opfunc[] = {
1026: DIV, TANY, "udiv",
1027: MOD, TANY, "urem",
1028: ASG DIV, TANY, "udiv",
1029: ASG MOD, TANY, "urem",
1030: 0, 0, 0 };
1031:
1032: hardops(p) register NODE *p; {
1033: /* change hard to do operators into function calls. */
1034: register NODE *q;
1035: register struct functbl *f;
1036: register o;
1037: register TWORD t;
1038:
1039: o = p->in.op;
1040: t = p->in.type;
1041: if( t!=UNSIGNED && t!=ULONG ) return;
1042:
1043: for( f=opfunc; f->fop; f++ ) {
1044: if( o==f->fop ) goto convert;
1045: }
1046: return;
1047:
1048: /* need to rewrite tree for ASG OP */
1049: /* must change ASG OP to a simple OP */
1050: convert:
1051: if( asgop( o ) ) {
1052: q = talloc();
1053: switch( p->in.op ) {
1054: case ASG DIV:
1055: q->in.op = DIV;
1056: break;
1057: case ASG MOD:
1058: q->in.op = MOD;
1059: break;
1060: }
1061: q->in.rall = NOPREF;
1062: q->in.type = p->in.type;
1063: q->in.left = tcopy(p->in.left);
1064: q->in.right = p->in.right;
1065: p->in.op = ASSIGN;
1066: p->in.right = q;
1067: zappost(q->in.left); /* remove post-INCR(DECR) from new node */
1068: fixpre(q->in.left); /* change pre-INCR(DECR) to +/- */
1069: p = q;
1070:
1071: }
1072:
1073: /* build comma op for args to function */
1074: q = talloc();
1075: q->in.op = CM;
1076: q->in.rall = NOPREF;
1077: q->in.type = INT;
1078: q->in.left = p->in.left;
1079: q->in.right = p->in.right;
1080: p->in.op = CALL;
1081: p->in.right = q;
1082:
1083: /* put function name in left node of call */
1084: p->in.left = q = talloc();
1085: q->in.op = ICON;
1086: q->in.rall = NOPREF;
1087: q->in.type = INCREF( FTN + p->in.type );
1088: #ifndef FLEXNAMES
1089: strcpy( q->in.name, f->func );
1090: #else
1091: q->in.name = f->func;
1092: #endif
1093: q->tn.lval = 0;
1094: q->tn.rval = 0;
1095:
1096: return;
1097:
1098: }
1099:
1100: zappost(p) NODE *p; {
1101: /* look for ++ and -- operators and remove them */
1102:
1103: register o, ty;
1104: register NODE *q;
1105: o = p->in.op;
1106: ty = optype( o );
1107:
1108: switch( o ){
1109:
1110: case INCR:
1111: case DECR:
1112: q = p->in.left;
1113: p->in.right->in.op = FREE; /* zap constant */
1114: ncopy( p, q );
1115: q->in.op = FREE;
1116: return;
1117:
1118: }
1119:
1120: if( ty == BITYPE ) zappost( p->in.right );
1121: if( ty != LTYPE ) zappost( p->in.left );
1122: }
1123:
1124: fixpre(p) NODE *p; {
1125:
1126: register o, ty;
1127: o = p->in.op;
1128: ty = optype( o );
1129:
1130: switch( o ){
1131:
1132: case ASG PLUS:
1133: p->in.op = PLUS;
1134: break;
1135: case ASG MINUS:
1136: p->in.op = MINUS;
1137: break;
1138: }
1139:
1140: if( ty == BITYPE ) fixpre( p->in.right );
1141: if( ty != LTYPE ) fixpre( p->in.left );
1142: }
1143:
1144: myreader(p) register NODE *p; {
1145: walkf( p, hardops ); /* convert ops to function calls */
1146: canon( p ); /* expands r-vals for fileds */
1147: walkf( p, optim2 );
1148: /* jwf toff = 0; /* stack offset swindle */
1149: }
1150:
1151:
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