-
Notifications
You must be signed in to change notification settings - Fork 0
/
assemblygen.c
865 lines (808 loc) · 30.8 KB
/
assemblygen.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
/*
* File: assemblygen.c
* Purpose: To create proper assembly code from quads
*
* CS 48
* Jonathan Connell & David Kopec
*/
#include "assemblygen.h"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "quads.h"
#include "ast.h"
#include "Symtab.h"
/* GLOBAL VARIABLES */
Quad **quads; /* Array of Quads */
SymbolTable *symtab; /* Symbol Table */
void AssemblyGen(Quad** q, FILE* file, SymbolTable* s) {
/**************************************************************************
* Name: AssemblyGen
* Purpose: iterates through each quad, generates the corresponding
* assembly code, and outputs the assembly code to a file.
* Parameters: q, the array of quads
* file, the file to which the assembly code will be wrriten to
* s, the symbol table for our program
**************************************************************************/
quads = q;
symtab = s;
/* Here, we keep an array called quadStartLocations that keeps track
* of each quad number and its corresponding assembly code line
* number. This makes it easier to quickly to do detect what line we
* may need to jump to.
*/
int i = 0; // Quad number
int AssemNum = 0; // Assembly code line number
int quadStartLocations[10000];
int scopeStart[50] = {0};
int curScope = 0;
/* For each quad, we represent it with the form
* (op, a1, a2, a3)
*/
OpKind op = quads[i]->op;
Address a1 = quads[i]->addr1;
Address a2 = quads[i]->addr2;
Address a3 = quads[i]->addr3;
/* Symbol Table nodes for a1, a2, and a3 respectively */
SymNode *s1;
SymNode *s2;
SymNode *s3;
/* Loop through each quad, generating assembly code as necessary */
while (quads[i] != NULL) {
a1 = quads[i]->addr1;
a2 = quads[i]->addr2;
a3 = quads[i]->addr3;
quadStartLocations[i] = AssemNum; /* Keeping track of which assembly code line
* numbers correspond to which quad numbers.
*/
/* TYPE DETECTION
*
* All variables are stored in quads as a string beginning with a '$',
* so we have see if each value is of type String. If it is then we know
* that it is a variable.
* Otherwise, it is either an Int constant or Double constant.
*
* This is checked for all 3 quad variables below.
*/
char type_to_store = 'i'; /* Type of variable to be stored to (default: int) */
char type_of_storage = 'i'; /* Type of variable to be stored (default: int) */
/* TYPE DETECTION OF THE FIRST QUAD VARIABLE */
if (a1.kind == String){
s1 = LookupInSymbolTable(symtab, a1.contents.name);
printf(" %s", a1.contents.name);
if (s1->attrs->type == DouT)
type_of_storage = 'd';
}
else if (a1.kind == IntConst) {
printf(" %d", a1.contents.val);
}
else if (a1.kind == DouConst) {
printf(" %f", a1.contents.dval);
type_of_storage = 'd';
}
else printf(" - ");
/* TYPE DETECTION OF THE SECOND QUAD VARIABLE */
if (a2.kind == String){
s2 = LookupInSymbolTable(symtab, a2.contents.name);
printf(" %s", a2.contents.name);
}
else if (a2.kind == IntConst) {
printf(" %d", a2.contents.val);
}
else if (a2.kind == DouConst) {
printf(" %f", a2.contents.dval);
}
else printf(" - ");
/* TYPE DETECTION OF THE THIRD QUAD VARIABLE */
if (a3.kind == String){
s3 = LookupInSymbolTable(symtab, a3.contents.name);
printf(" %s\n", a3.contents.name);
}
else if (a3.kind == IntConst) {
printf(" %d\n", a3.contents.val);
}
else if (a3.kind == DouConst) {
printf(" %f\n", a3.contents.dval);
}
else printf(" - \n");
AssemKind AK;
char* AssemCommand = " ";
/****************************************************/
/****************** TM48 COMMANDS *******************/
/****************************************************/
if (quads[i]->op == add) { /* Addition (+) */
AK = math; AssemCommand = "ADD";
}
else if (quads[i]->op == sub) { /* Subtraction (-) */
AK = math; AssemCommand = "SUB";
}
else if (quads[i]->op == mul) { /* Multiplication (*) */
AK = math; AssemCommand = "MUL";
}
else if (quads[i]->op == divi) { /* Division (/) */
AK = math; AssemCommand = "DIV";
}
else if (quads[i]->op == gt) { /* Greater Than (>) */
AK = inequality; AssemCommand = "GT";
}
else if (quads[i]->op == gteq) { /* Greater Than or Equal (>=) */
AK = inequality; AssemCommand = "GE";
}
else if (quads[i]->op == lt) { /* Less Than (<) */
AK = inequality; AssemCommand = "LT";
}
else if (quads[i]->op == lteq) { /* Less Than or Equal (<=) */
AK = inequality; AssemCommand = "LE";
}
else if (quads[i]->op == eq) { /* Equals (=) */
AK = inequality; AssemCommand = "EQ";
}
else if (quads[i]->op == neq) { /* Not Equal To (!=) */
AK = inequality; AssemCommand = "NE";
}
else if (quads[i]->op == asn) { /* Store value */
AK = assignment; AssemCommand = "ST";
}
else if (quads[i]->op == rd) { /* Read from STD IN */
AK = read; AssemCommand = "IN";
}
else if (quads[i]->op == wri) { /* Write to STD OUT */
AK = write; AssemCommand = "OUT";
}
else if (quads[i]->op == if_f) { /* If False, Jump */
AK = iffalse; AssemCommand = " ";
}
else if (quads[i]->op == gotoq) { /* Go to Quad */
AK = jumptoquad; AssemCommand = "LDA";
}
else if (quads[i]->op == loadpar) { /* Load a Function's Parameter */
AK = loadparam; AssemCommand = "LD";
}
else if (quads[i]->op == con) { /* Continue Statement */
AK = cont; AssemCommand = "CONT";
}
else if (quads[i]->op == exs) { /* Exit Scope */
AK = exitScope; AssemCommand = " ";
}
else if (quads[i]->op == ens) { /* Enter Scope */
AK = enterScope; AssemCommand = " ";
}
else if (quads[i]->op == ret) { /* Return */
AK = retu; AssemCommand = "LDA";
}
else {
AK = other; AssemCommand = "ERROR";
}
/****************************************************/
/***************** CODE GENERATION ******************/
/****************************************************/
/** Initialize registers **/
if (i == 0) {
fprintf(file, "%d: LD 6, 0(0)\n", AssemNum++);
fprintf(file, "%d: LDF 6, 0(0)\n", AssemNum++);
fprintf(file, "%d: ST 0, 0(0)\n", AssemNum++);
fprintf(file, "%d: STF 0, 0(0)\n", AssemNum++);
}
switch (AK) {
/*** MATH OPERATORS ***/
case (math):
if (a2.kind == String) {
printf("%d\n", s2->attrs->type);
if (s2->attrs->type == IntT) {
fprintf(file, "%d: LD 0, %d(5)\n", AssemNum++, -s2->attrs->memoffset);
if (a3.kind == String) {
if (s3->attrs->type == IntT) {
/* Operation between Int var and Int var */
fprintf(file, "%d: LD 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset);
fprintf(file, "%d: %s 0, 0, 1\n", AssemNum++, AssemCommand);
}
else if (s3->attrs->type == DouT) {
/* Operation between Int var and Double var */
type_to_store = 'd';
fprintf(file, "%d: CVTIF 0, 0, 0\n", AssemNum++);
if (s3->attrs->memoffset % 8 == 0)
fprintf(file, "%d: LDF 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset);
else
fprintf(file, "%d: LDF 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset + 4);
fprintf(file, "%d: %sF 0, 0, 1\n", AssemNum++, AssemCommand);
}
else {
fprintf(file, "ERROR - Math\n");
}
}
else if (a3.kind == IntConst) {
/* Operation between Int var and Int constant */
fprintf(file, "%d: LDC 1, %d(0)\n", AssemNum++, a3.contents.val);
fprintf(file, "%d: %s 0, 0, 1\n", AssemNum++, AssemCommand);
}
else if (a3.kind == DouConst) {
/* Operation between Int var and Double constant */
type_to_store = 'd';
fprintf(file, "%d: CVTIF 0, 0, 0\n", AssemNum++);
fprintf(file, "%d: LDFC 1, %f(0)\n", AssemNum++, a3.contents.dval);
fprintf(file, "%d: %sF 0, 0, 1\n", AssemNum++, AssemCommand);
}
else {
fprintf(file, "ERROR - Math\n");
}
}
else if (s2->attrs->type == DouT) {
type_to_store = 'd';
if (s2->attrs->memoffset % 8 == 0)
fprintf(file, "%d: LDF 0, %d(5)\n", AssemNum++, -s2->attrs->memoffset);
else
fprintf(file, "%d: LDF 0, %d(5)\n", AssemNum++, -s2->attrs->memoffset + 4);
//fprintf(file, "%d: LDF 0, %d(5)\n", AssemNum++, -s2->attrs->memoffset);
if (a3.kind == String) {
if (s3->attrs->type == IntT) {
/* Operation between Double var and Int var */
fprintf(file, "%d: LD 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset);
fprintf(file, "%d: CVTIF 1, 1, 1\n", AssemNum++);
fprintf(file, "%d: %sF 0, 0, 1\n", AssemNum++, AssemCommand);
}
else if (s3->attrs->type == DouT) {
/* Operation between Double var and Double var */
if (s3->attrs->memoffset % 8 == 0)
fprintf(file, "%d: LDF 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset);
else
fprintf(file, "%d: LDF 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset + 4);
fprintf(file, "%d: %sF 0, 0, 1\n", AssemNum++, AssemCommand);
}
else {
fprintf(file, "ERROR - Math\n");
}
}
else if (a3.kind == IntConst) {
/* Operation between Double var and Int constant */
fprintf(file, "%d: LDC 1, %d(0)\n", AssemNum++, a3.contents.val);
fprintf(file, "%d: CVTIF 1, 1, 1\n", AssemNum++);
fprintf(file, "%d: %sF 0, 0, 1\n", AssemNum++, AssemCommand);
}
else if (a3.kind == DouConst) {
/* Operation between Double var and Double constant */
fprintf(file, "%d: LDFC 1, %f(0)\n", AssemNum++, a3.contents.dval);
fprintf(file, "%d: %sF 0, 0, 1\n", AssemNum++, AssemCommand);
}
else {
fprintf(file, "ERROR - Math\n");
}
}
else {
fprintf(file, "ERROR - Math\n");
}
}
else if (a2.kind == IntConst) {
fprintf(file, "%d: LDC 0, %d(0)\n", AssemNum++, a2.contents.val);
if (a3.kind == String) {
if (s3->attrs->type == IntT) {
/* Operation between Int constant and Int var */
fprintf(file, "%d: LD 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset);
fprintf(file, "%d: %s 0, 0, 1\n", AssemNum++, AssemCommand);
}
else if (s3->attrs->type == DouT) {
/* Operation between Int constant and Double var */
type_to_store = 'd';
fprintf(file, "%d: CVTIF 0, 0, 0\n", AssemNum++);
if (s3->attrs->memoffset % 8 == 0)
fprintf(file, "%d: LDF 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset);
else
fprintf(file, "%d: LDF 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset + 4);
fprintf(file, "%d: %sF 0, 0, 1\n", AssemNum++, AssemCommand);
}
else {
fprintf(file, "ERROR - Math\n");
}
}
else if (a3.kind == IntConst) {
/* Operation between Int constant and Int constant */
fprintf(file, "%d: LDC 1, %d(0)\n", AssemNum++, a3.contents.val);
fprintf(file, "%d: %s 0, 0, 1\n", AssemNum++, AssemCommand);
}
else if (a3.kind == DouConst) {
/* Operation between Int constant and Double constant */
type_to_store = 'd';
fprintf(file, "%d: CVTIF 0, 0, 0\n", AssemNum++);
fprintf(file, "%d: LDFC 1, %f(0)\n", AssemNum++, a3.contents.dval);
fprintf(file, "%d: %sF 0, 0, 1\n", AssemNum++, AssemCommand);
}
else {
fprintf(file, "ERROR - Math\n");
}
}
else if (a2.kind == DouConst) {
type_to_store = 'd';
fprintf(file, "%d: LDFC 0, %f(0)\n", AssemNum++, a2.contents.dval);
if (a3.kind == String) {
if (s3->attrs->type == IntT) {
/* Operation between Double constant and Int var */
fprintf(file, "%d: LD 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset);
fprintf(file, "%d: CVTIF 1, 1, 1\n", AssemNum++);
fprintf(file, "%d: %sF 0, 0, 1\n", AssemNum++, AssemCommand);
}
else if (s3->attrs->type == DouT) {
/* Operation between Double constant and Double var */
if (s3->attrs->memoffset % 8 == 0)
fprintf(file, "%d: LDF 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset);
else
fprintf(file, "%d: LDF 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset + 4);
fprintf(file, "%d: %sF 0, 0, 1\n", AssemNum++, AssemCommand);
}
else {
fprintf(file, "ERROR - Math\n");
}
}
else if (a3.kind == IntConst) {
/* Operation between Double constant and Int constant */
fprintf(file, "%d: LDC 1, %d(0)\n", AssemNum++, a3.contents.val);
fprintf(file, "%d: CVTIF 1, 1, 1\n", AssemNum++);
fprintf(file, "%d: %sF 0, 0, 1\n", AssemNum++, AssemCommand);
}
else if (a3.kind == DouConst) {
/* Operation between Double constant and Double constant */
fprintf(file, "%d: LDFC 1, %f(0)\n", AssemNum++, a3.contents.dval);
fprintf(file, "%d: %sF 0, 0, 1\n", AssemNum++, AssemCommand);
}
else {
fprintf(file, "ERROR - Math\n");
}
}
else {
fprintf(file, "ERROR - Math\n");
}
/** Storing values based on data types **/
/* Store double in double */
if (type_to_store == 'd' && type_of_storage == 'd') {
//fprintf(file, "%d: STF 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset);
if (s1->attrs->memoffset % 8 == 0)
fprintf(file, "%d: STF 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset);
else
fprintf(file, "%d: STF 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset + 4);
}
/* Store double in int */
else if (type_to_store == 'd' && type_of_storage == 'i') {
fprintf(file, "%d: CVTFI 0, 0, 0\n", AssemNum++);
fprintf(file, "%d: ST 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset);
}
/* Store int in double */
else if (type_to_store == 'i' && type_of_storage == 'd') {
fprintf(file, "%d: CVTIF 0, 0, 0\n", AssemNum++);
if (s1->attrs->memoffset % 8 == 0)
fprintf(file, "%d: STF 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset);
else
fprintf(file, "%d: STF 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset + 4);
//fprintf(file, "%d: STF 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset);
}
/* Store int in int */
else if (type_to_store == 'i' && type_of_storage == 'i') {
fprintf(file, "%d: ST 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset);
}
else {
fprintf(file, "ERROR - Math\n");
}
break;
/*** INEQUALITIES ***/
case inequality:
if (a2.kind == String) {
if (s2->attrs->type == IntT) {
fprintf(file, "%d: LD 0, %d(5)\n", AssemNum++, -s2->attrs->memoffset);
if (a3.kind == String) {
if (s3->attrs->type == IntT) {
/* Ineqality between Int var and Int var */
fprintf(file, "%d: LD 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset);
fprintf(file, "%d: SUB 0, 1, 0\n", AssemNum++);
fprintf(file, "%d: J%s 0, 2(7)\n", AssemNum++, AssemCommand);
fprintf(file, "%d: LDC 0, 0(0)\n", AssemNum++);
fprintf(file, "%d: LDA 7, 1(7)\n", AssemNum++);
fprintf(file, "%d: LDC 0, 1(0)\n", AssemNum++);
}
else if (s3->attrs->type == DouT) {
/* Ineqality between Int var and Double var */
fprintf(file, "%d: CVTIF 0, 0, 0\n", AssemNum++);
//fprintf(file, "%d: LDF 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset);
if (s3->attrs->memoffset % 8 == 0)
fprintf(file, "%d: LDF 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset);
else
fprintf(file, "%d: LDF 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset + 4);
fprintf(file, "%d: SUBF 0, 1, 0\n", AssemNum++);
fprintf(file, "%d: JF%s 0, 2(7)\n", AssemNum++, AssemCommand);
fprintf(file, "%d: LDC 0, 0(0)\n", AssemNum++);
fprintf(file, "%d: LDA 7, 1(7)\n", AssemNum++);
fprintf(file, "%d: LDC 0, 1(0)\n", AssemNum++);
}
else {
fprintf(file, "ERROR - Inequality\n");
}
}
else if (a3.kind == IntConst) {
/* Ineqality between Int var and Int constant */
fprintf(file, "%d: LDC 1, %d(0)\n", AssemNum++, a3.contents.val);
fprintf(file, "%d: SUB 0, 1, 0\n", AssemNum++);
fprintf(file, "%d: J%s 0, 2(7)\n", AssemNum++, AssemCommand);
fprintf(file, "%d: LDC 0, 0(0)\n", AssemNum++);
fprintf(file, "%d: LDA 7, 1(7)\n", AssemNum++);
fprintf(file, "%d: LDC 0, 1(0)\n", AssemNum++);
}
else if (a3.kind == DouConst) {
/* Ineqality between Int var and Double constant */
fprintf(file, "%d: CVTIF 0, 0, 0\n", AssemNum++);
fprintf(file, "%d: LDFC 1, %f(0)\n", AssemNum++, a3.contents.dval);
fprintf(file, "%d: SUBF 0, 1, 0\n", AssemNum++);
fprintf(file, "%d: JF%s 0, 2(7)\n", AssemNum++, AssemCommand);
fprintf(file, "%d: LDC 0, 0(0)\n", AssemNum++);
fprintf(file, "%d: LDA 7, 1(7)\n", AssemNum++);
fprintf(file, "%d: LDC 0, 1(0)\n", AssemNum++);
}
else {
fprintf(file, "ERROR - Inequality\n");
}
}
else if (s2->attrs->type == DouT) {
if (s2->attrs->memoffset % 8 == 0)
fprintf(file, "%d: LDF 0, %d(5)\n", AssemNum++, -s2->attrs->memoffset);
else
fprintf(file, "%d: LDF 0, %d(5)\n", AssemNum++, -s2->attrs->memoffset + 4);
//fprintf(file, "%d: LDF 0, %d(5)\n", AssemNum++, -s2->attrs->memoffset);
if (a3.kind == String) {
if (s3->attrs->type == IntT) {
/* Ineqality between Double var and Int var */
fprintf(file, "%d: LD 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset);
fprintf(file, "%d: CVTIF 1, 1, 1\n", AssemNum++);
}
else if (s3->attrs->type == DouT) {
/* Ineqality between Double var and Double var */
//fprintf(file, "%d: LDF 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset);
if (s3->attrs->memoffset % 8 == 0)
fprintf(file, "%d: LDF 0, %d(5)\n", AssemNum++, -s3->attrs->memoffset);
else
fprintf(file, "%d: LDF 0, %d(5)\n", AssemNum++, -s3->attrs->memoffset + 4);
}
else {
fprintf(file, "ERROR - Inequality\n");
}
}
else if (a3.kind == IntConst) {
/* Ineqality between Double var and Int constant */
fprintf(file, "%d: LDC 1, %d(0)\n", AssemNum++, a3.contents.val);
fprintf(file, "%d: CVTIF 1, 1, 1\n", AssemNum++);
}
else if (a3.kind == DouConst) {
/* Ineqality between Double var and Double constant */
fprintf(file, "%d: LDFC 1, %f(0)\n", AssemNum++, a3.contents.dval);
}
else {
fprintf(file, "ERROR - Inequality\n");
}
fprintf(file, "%d: SUBF 0, 1, 0\n", AssemNum++);
fprintf(file, "%d: JF%s 0, 2(7)\n", AssemNum++, AssemCommand);
fprintf(file, "%d: LDC 0, 0(0)\n", AssemNum++);
fprintf(file, "%d: LDA 7, 1(7)\n", AssemNum++);
fprintf(file, "%d: LDC 0, 1(0)\n", AssemNum++);
}
else {
fprintf(file, "ERROR - Inequality\n");
}
}
else if (a2.kind == IntConst) {
fprintf(file, "%d: LDC 0, %d(0)\n", AssemNum++, a2.contents.val);
if (a3.kind == String) {
if (s3->attrs->type == IntT) {
/* Ineqality between Int constant and Int var */
fprintf(file, "%d: LD 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset);
fprintf(file, "%d: SUB 0, 1, 0\n", AssemNum++);
fprintf(file, "%d: J%s 0, 2(7)\n", AssemNum++, AssemCommand);
fprintf(file, "%d: LDC 0, 0(0)\n", AssemNum++);
fprintf(file, "%d: LDA 7, 1(7)\n", AssemNum++);
fprintf(file, "%d: LDC 0, 1(0)\n", AssemNum++);
}
else if (s3->attrs->type == DouT) {
/* Ineqality between Int constant and Double var */
fprintf(file, "%d: CVTIF 0, 0, 0\n", AssemNum++);
if (s3->attrs->memoffset % 8 == 0)
fprintf(file, "%d: LDF 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset);
else
fprintf(file, "%d: LDF 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset + 4);
fprintf(file, "%d: SUBF 0, 1, 0\n", AssemNum++);
fprintf(file, "%d: JF%s 0, 2(7)\n", AssemNum++, AssemCommand);
fprintf(file, "%d: LDC 0, 0(0)\n", AssemNum++);
fprintf(file, "%d: LDA 7, 1(7)\n", AssemNum++);
fprintf(file, "%d: LDC 0, 1(0)\n", AssemNum++);
}
else {
fprintf(file, "ERROR - Inequality\n");
}
}
else if (a3.kind == IntConst) {
/* Ineqality between Int constant and Int constant */
fprintf(file, "%d: LDC 1, %d(0)\n", AssemNum++, a3.contents.val);
fprintf(file, "%d: SUB 0, 1, 0\n", AssemNum++);
fprintf(file, "%d: J%s 0, 2(7)\n", AssemNum++, AssemCommand);
fprintf(file, "%d: LDC 0, 0(0)\n", AssemNum++);
fprintf(file, "%d: LDA 7, 1(7)\n", AssemNum++);
fprintf(file, "%d: LDC 0, 1(0)\n", AssemNum++);
}
else if (a3.kind == DouConst) {
/* Ineqality between Int constant and Double constant */
fprintf(file, "%d: CVTIF 0, 0, 0\n", AssemNum++);
fprintf(file, "%d: LDFC 1, %f(0)\n", AssemNum++, a3.contents.dval);
fprintf(file, "%d: SUBF 0, 1, 0\n", AssemNum++);
fprintf(file, "%d: JF%s 0, 2(7)\n", AssemNum++, AssemCommand);
fprintf(file, "%d: LDC 0, 0(0)\n", AssemNum++);
fprintf(file, "%d: LDA 7, 1(7)\n", AssemNum++);
fprintf(file, "%d: LDC 0, 1(0)\n", AssemNum++);
}
else {
fprintf(file, "ERROR - Inequality\n");
}
}
else if (a2.kind == DouConst) {
fprintf(file, "%d: LDFC 0, %f(0)\n", AssemNum++, a2.contents.dval);
if (a3.kind == String) {
if (s3->attrs->type == IntT) {
/* Ineqality between Double constant and Int var */
fprintf(file, "%d: LD 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset);
fprintf(file, "%d: CVTIF 1, 0, 1\n", AssemNum++);
}
else if (s3->attrs->type == DouT) {
/* Ineqality between Double constant and Double var */
if (s3->attrs->memoffset % 8 == 0)
fprintf(file, "%d: LDF 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset);
else
fprintf(file, "%d: LDF 1, %d(5)\n", AssemNum++, -s3->attrs->memoffset + 4);
}
else {
fprintf(file, "ERROR - Inequality\n");
}
}
else if (a3.kind == IntConst) {
/* Ineqality between Double constant and Int constant */
fprintf(file, "%d: LDC 1, %d(0)\n", AssemNum++, a3.contents.val);
fprintf(file, "%d: CVTIF 1, 0, 1\n", AssemNum++);
}
else if (a3.kind == DouConst) {
/* Ineqality between Double constant and Double constant */
fprintf(file, "%d: LDFC 1, %f(0)\n", AssemNum++, a3.contents.dval);
}
else {
fprintf(file, "ERROR - Inequality\n");
}
fprintf(file, "%d: SUBF 0, 1, 0\n", AssemNum++);
fprintf(file, "%d: JF%s 0, 2(7)\n", AssemNum++, AssemCommand);
fprintf(file, "%d: LDC 0, 0(0)\n", AssemNum++);
fprintf(file, "%d: LDA 7, 1(7)\n", AssemNum++);
fprintf(file, "%d: LDC 0, 1(0)\n", AssemNum++);
}
else {
fprintf(file, "ERROR\n");
}
break;
/*** ASSIGNMENT ***/
case assignment:
if (type_of_storage == 'd') {
if (a2.kind == String) {
if (s2->attrs->type == IntT) {
/* Store an Int variable in a Double variable */
fprintf(file, "%d: LD 0, %d(5)\n", AssemNum++, -s2->attrs->memoffset);
fprintf(file, "%d: CVTIF 0, 0, 0\n", AssemNum++);
if (s1->attrs->memoffset % 8 == 0)
fprintf(file, "%d: STF 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset);
else
fprintf(file, "%d: STF 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset + 4);
}
else if (s2->attrs->type == DouT) {
/* Store a Double variable in a Double variable */
if (s2->attrs->memoffset % 8 == 0)
fprintf(file, "%d: LDF 0, %d(5)\n", AssemNum++, -s2->attrs->memoffset);
else
fprintf(file, "%d: LDF 0, %d(5)\n", AssemNum++, -s2->attrs->memoffset + 4);
if (s1->attrs->memoffset % 8 == 0)
fprintf(file, "%d: STF 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset);
else
fprintf(file, "%d: STF 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset + 4);
//fprintf(file, "%d: STF 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset);
}
else {
fprintf(file, "ERROR - Assignment 1\n");
}
}
else if (a2.kind == DouConst) {
/* Store a Double constant in a Double variable */
fprintf(file, "%d: LDFC 0, %f(0)\n", AssemNum++, a2.contents.dval);
if (s1->attrs->memoffset % 8 == 0)
fprintf(file, "%d: STF 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset);
else
fprintf(file, "%d: STF 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset + 4);
//fprintf(file, "%d: STF 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset);
}
else if (a2.kind == IntConst) {
/* Store an Int constant in a Double variable */
fprintf(file, "%d: LDC 0, %d(0)\n", AssemNum++, a2.contents.val);
fprintf(file, "%d: CVTIF 0 0, 0\n", AssemNum++);
if (s1->attrs->memoffset % 8 == 0)
fprintf(file, "%d: STF 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset);
else
fprintf(file, "%d: STF 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset + 4);
//fprintf(file, "%d: STF 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset);
}
else {
fprintf(file, "ERROR - Assignment 2\n");
}
}
else { /* If storage type is an integer */
if (a2.kind == String) {
if (s2->attrs->type == IntT) {
/* Store an Int variable in an Int variable */
fprintf(file, "%d: LD 0, %d(5)\n", AssemNum++, -s2->attrs->memoffset);
fprintf(file, "%d: ST 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset);
}
else if (s2->attrs->type == DouT) {
/* Store a Double variable in an Int variable */
if (s2->attrs->memoffset % 8 == 0)
fprintf(file, "%d: LDF 0, %d(5)\n", AssemNum++, -s2->attrs->memoffset);
else
fprintf(file, "%d: LDF 0, %d(5)\n", AssemNum++, -s2->attrs->memoffset + 4);
//fprintf(file, "%d: f, %d(5)\n", AssemNum++, -s2->attrs->memoffset);
fprintf(file, "%d: CVTFI 0, 0, 0\n", AssemNum++);
fprintf(file, "%d: ST 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset);
}
else {
/*f*/printf(/*file,*/ "ERROR - Assignment 3\n");
}
}
else if (a2.kind == DouConst) {
/* Store a Double constant in an Int variable */
fprintf(file, "%d: LDFC 0, %f(0)\n", AssemNum++, a2.contents.dval);
fprintf(file, "%d: CVTFI 0 0, 0\n", AssemNum++);
fprintf(file, "%d: ST 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset);
}
else if (a2.kind == IntConst) {
/* Store an Int constant in an Int variable */
fprintf(file, "%d: LDC 0, %d(0)\n", AssemNum++, a2.contents.val);
fprintf(file, "%d: ST 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset);
}
else {
fprintf(file, "ERROR - Assignment 4\n");
}
}
break;
/*** READ FROM STANDARD INPUT ***/
case read:
if (s1->attrs->type == IntT) {
fprintf(file, "%d: IN 0, 0, 0\n", AssemNum++);
}
else if (s1->attrs->type == DouT) {
fprintf(file, "%d: INF 0, 0, 0\n", AssemNum++);
}
else {
fprintf(file, "ERROR - Read\n");
}
break;
/*** WRITE TO STANDARD OUTPUT ***/
case write:
if (a1.kind == String) {
if (s1->attrs->type == IntT) {
fprintf(file, "%d: LD 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset);
fprintf(file, "%d: OUT 0, 0, 0\n", AssemNum++);
}
else if (s1->attrs->type == DouT) {
if (s1->attrs->memoffset % 8 == 0)
fprintf(file, "%d: LDF 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset);
else
fprintf(file, "%d: LDF 0, %d(5)\n", AssemNum++, -s1->attrs->memoffset + 4);
fprintf(file, "%d: OUTF 0, 0, 0\n", AssemNum++);
}
else {
/*f*/printf(/*file,*/ "ERROR - Write\n");
}
}
else if (a1.kind == IntConst) {
fprintf(file, "%d: LDC 0, %d(0)\n", AssemNum++, a1.contents.val);
fprintf(file, "%d: OUT 0, 0, 0\n", AssemNum++);
}
else if (a1.kind == DouConst) {
fprintf(file, "%d: LDFC 0, %f(0)\n", AssemNum++, a1.contents.dval);
fprintf(file, "%d: OUTF 0, 0, 0\n", AssemNum++);
}
else {
fprintf(file, "ERROR - Write\n");
}
break;
/*
* "If False" and "Goto" quads are not analyzed in normal order.
* This is explained below when they are actually implemented.
*/
/*** JUMP IF FALSE ***/
case iffalse:
AssemNum++;
AssemNum++;
AssemNum++;
break;
/*** JUMP TO A QUAD ***/
case jumptoquad:
AssemNum++;
break;
/*** CONTINUE ***/
case cont:
fprintf(file, "%d: LDA 7, %d(7)\n", AssemNum++, curScope);
break;
case enterScope:
//printf(" Level %d \n", GetNodeLevel(s1));
printf("ENTERING SCOPE\n");
scopeStart[++curScope] = i;
EnterScope(symtab);
//continue;
break;
case exitScope:
scopeStart[--curScope] = 0;
LeaveScope(symtab);
//printf(" Level %d \n", GetNodeLevel(s1));
//continue;
break;
case retu:
printf("RETURNING AASFEGAEGEGAE\n");
fprintf(file, "%d: LDA 7, %d(7)\n", AssemNum++, curScope);
break;
default:
//printf("Quad not recognized.\n");
break;
}
i++;
}
/*
* Due to the fact that there are times that we may want to jump to an
* unknown location that we have not processed yet, we wait to analyze
* "goto" and "if false" quads until after all other asseembly lines
* have been analyzed.
*
* By doing this we can just print a few lines out of order to avoid any
* rewriting of the output file.
* /
/*** Printing assembly lines for goto statements. ***/
i = 0;
while (quads[i] != NULL) {
a1 = quads[i]->addr1;
a2 = quads[i]->addr2;
a3 = quads[i]->addr3;
if (quads[i]->op == gotoq) {
fprintf(file, "%d: LDA 7, %d(7)\n", quadStartLocations[i], (quadStartLocations[a1.contents.val]) - quadStartLocations[i] - 1);
}
i++;
}
/*** Printing assembly lines for "if false" statements ***/
i = 0;
while (quads[i] != NULL) {
a1 = quads[i]->addr1;
a2 = quads[i]->addr2;
a3 = quads[i]->addr3;
if (quads[i]->op == if_f) {
if (a1.kind == String) {
s1 = LookupInSymbolTable(symtab, a1.contents.name);
if (s1->attrs->type == IntT) {
fprintf(file, "%d: LD 0, %d(5)\n", quadStartLocations[i], -s1->attrs->memoffset);
fprintf(file, "%d: JNE 0, 1(7)\n", quadStartLocations[i]+1);
fprintf(file, "%d: LDA 7, %d(7)\n", quadStartLocations[i]+2, (quadStartLocations[a2.contents.val]) - (quadStartLocations[i]+2) - 1);
}
else if (s1->attrs->type == DouT) {
if (s1->attrs->memoffset % 8 == 0)
fprintf(file, "%d: LDF 0, %d(5)\n", quadStartLocations[i], -s1->attrs->memoffset);
else
fprintf(file, "%d: LDF 0, %d(5)\n", quadStartLocations[i], -s1->attrs->memoffset + 4);
fprintf(file, "%d: JFNE 0, 1(7)\n", quadStartLocations[i]+1);
fprintf(file, "%d: LDA 7, %d(7)\n", quadStartLocations[i]+2, (quadStartLocations[a2.contents.val]) - (quadStartLocations[i]+2) - 1);
}
else {
printf("ERROR - IfFalse\n");
}
}
i++;
}
printf("%d\n", i++);
}
/* Code for debugging purposes.
* This prints quad lines and their corresponding assembly lines.
*/
int j = 0;
for (j = 0; j < 100; j++) {
printf("%d %d\n", j, quadStartLocations[j]);
}
fprintf(file, "%d: HALT 0, 0, 0\n", AssemNum++);
}