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
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Mu - linux/crenshaw2-1b.subx</title>
<meta name="Generator" content="Vim/8.1">
<meta name="plugin-version" content="vim8.1_v1">
<meta name="syntax" content="none">
<meta name="settings" content="number_lines,use_css,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
<meta name="colorscheme" content="minimal-light">
<style type="text/css">
<!--
pre { font-family: monospace; color: #000000; background-color: #ffffd7; }
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #ffffd7; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.subxComment { color: #005faf; }
.subxS2Comment { color: #8a8a8a; }
.subxFunction { color: #af5f00; text-decoration: underline; }
.LineNr { }
.subxTest { color: #5f8700; }
.subxS1Comment { color: #0000af; }
.SpecialChar { color: #d70000; }
.Normal { color: #000000; background-color: #ffffd7; padding-bottom: 1px; }
.Constant { color: #008787; }
.subxH1Comment { color: #005faf; text-decoration: underline; }
-->
</style>
<script type='text/javascript'>
<!--
/* function to open any folds containing a jumped-to line before jumping to it */
function JumpToLine()
{
var lineNum;
lineNum = window.location.hash;
lineNum = lineNum.substr(1); /* strip off '#' */
if (lineNum.indexOf('L') == -1) {
lineNum = 'L'+lineNum;
}
var lineElem = document.getElementById(lineNum);
/* Always jump to new location even if the line was hidden inside a fold, or
* we corrected the raw number to a line ID.
*/
if (lineElem) {
lineElem.scrollIntoView(true);
}
return true;
}
if ('onhashchange' in window) {
window.onhashchange = JumpToLine;
}
-->
</script>
</head>
<body onload='JumpToLine();'>
<a href='https://github.com/akkartik/mu/blob/main/linux/crenshaw2-1b.subx'>https://github.com/akkartik/mu/blob/main/linux/crenshaw2-1b.subx</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># Port of <a href="https://github.com/akkartik/crenshaw/blob/master/tutor2.1.pas">https://github.com/akkartik/crenshaw/blob/master/tutor2.1.pas</a></span>
<span id="L2" class="LineNr"> 2 </span><span class="subxComment"># which corresponds to the section "single digits" in <a href="https://compilers.iecc.com/crenshaw/tutor2.txt">https://compilers.iecc.com/crenshaw/tutor2.txt</a></span>
<span id="L3" class="LineNr"> 3 </span><span class="subxComment"># except that we support hex numbers of multiple digits.</span>
<span id="L4" class="LineNr"> 4 </span><span class="subxComment">#</span>
<span id="L5" class="LineNr"> 5 </span><span class="subxComment"># To run:</span>
<span id="L6" class="LineNr"> 6 </span><span class="subxComment"># $ bootstrap/bootstrap translate [01]*.subx crenshaw2-1b.subx -o crenshaw2-1b</span>
<span id="L7" class="LineNr"> 7 </span><span class="subxComment"># $ echo '1a' |bootstrap/bootstrap run crenshaw2-1b</span>
<span id="L8" class="LineNr"> 8 </span><span class="subxComment"># Expected output:</span>
<span id="L9" class="LineNr"> 9 </span><span class="subxComment"># # syscall(exit, 1a)</span>
<span id="L10" class="LineNr"> 10 </span><span class="subxComment"># bb/copy-to-ebx 3/imm32</span>
<span id="L11" class="LineNr"> 11 </span><span class="subxComment"># b8/copy-to-eax 1/imm32/exit</span>
<span id="L12" class="LineNr"> 12 </span><span class="subxComment"># cd/syscall 0x80/imm8</span>
<span id="L13" class="LineNr"> 13 </span><span class="subxComment">#</span>
<span id="L14" class="LineNr"> 14 </span><span class="subxComment"># To run the generated output:</span>
<span id="L15" class="LineNr"> 15 </span><span class="subxComment"># $ echo '1a' |bootstrap/bootstrap run crenshaw2-1b > z1.subx</span>
<span id="L16" class="LineNr"> 16 </span><span class="subxComment"># $ bootstrap/bootstrap translate z1.subx -o z1</span>
<span id="L17" class="LineNr"> 17 </span><span class="subxComment"># $ bootstrap/bootstrap run z1</span>
<span id="L18" class="LineNr"> 18 </span><span class="subxComment"># $ echo $?</span>
<span id="L19" class="LineNr"> 19 </span><span class="subxComment"># 26 # 0x1a in decimal</span>
<span id="L20" class="LineNr"> 20 </span><span class="subxComment">#</span>
<span id="L21" class="LineNr"> 21 </span><span class="subxComment"># Stdin must contain just a single hex digit. Other input will print an error:</span>
<span id="L22" class="LineNr"> 22 </span><span class="subxComment"># $ echo 'xyz' |bootstrap/bootstrap run crenshaw2-1b</span>
<span id="L23" class="LineNr"> 23 </span><span class="subxComment"># Error: integer expected</span>
<span id="L24" class="LineNr"> 24 </span><span class="subxComment">#</span>
<span id="L25" class="LineNr"> 25 </span><span class="subxComment"># Names in this file sometimes follow Crenshaw's original rather than my usual</span>
<span id="L26" class="LineNr"> 26 </span><span class="subxComment"># naming conventions.</span>
<span id="L27" class="LineNr"> 27 </span>
<span id="L28" class="LineNr"> 28 </span>== code
<span id="L29" class="LineNr"> 29 </span><span class="subxComment"># instruction effective address register displacement immediate</span>
<span id="L30" class="LineNr"> 30 </span><span class="subxS1Comment"># . op subop mod rm32 base index scale r32</span>
<span id="L31" class="LineNr"> 31 </span><span class="subxS1Comment"># . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span>
<span id="L32" class="LineNr"> 32 </span>
<span id="L33" class="LineNr"> 33 </span><span class="SpecialChar">Entry</span>: <span class="subxComment"># run tests if necessary, call 'compile' if not</span>
<span id="L34" class="LineNr"> 34 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L35" class="LineNr"> 35 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L36" class="LineNr"> 36 </span>
<span id="L37" class="LineNr"> 37 </span> <span class="subxComment"># initialize heap</span>
<span id="L38" class="LineNr"> 38 </span> <span class="subxS1Comment"># . Heap = new-segment(Heap-size)</span>
<span id="L39" class="LineNr"> 39 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L40" class="LineNr"> 40 </span> 68/push <span class="SpecialChar"><a href='120allocate.subx.html#L27'>Heap</a></span>/imm32
<span id="L41" class="LineNr"> 41 </span> ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="SpecialChar"><a href='120allocate.subx.html#L34'>Heap-size</a></span>/disp32 <span class="subxComment"># push *Heap-size</span>
<span id="L42" class="LineNr"> 42 </span> <span class="subxS2Comment"># . . call</span>
<span id="L43" class="LineNr"> 43 </span> e8/call <a href='104new-segment.subx.html#L40'>new-segment</a>/disp32
<span id="L44" class="LineNr"> 44 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L45" class="LineNr"> 45 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L46" class="LineNr"> 46 </span>
<span id="L47" class="LineNr"> 47 </span> <span class="subxH1Comment"># - if argc > 1 and argv[1] == "test", then return run_tests()</span>
<span id="L48" class="LineNr"> 48 </span> <span class="subxComment"># if (argc <= 1) goto run-main</span>
<span id="L49" class="LineNr"> 49 </span> 81 7/subop/compare 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/disp8 1/imm32 <span class="subxComment"># compare *ebp</span>
<span id="L50" class="LineNr"> 50 </span> 7e/jump-if-<= $run-main/disp8
<span id="L51" class="LineNr"> 51 </span> <span class="subxComment"># if (!kernel-string-equal?(argv[1], "test")) goto run-main</span>
<span id="L52" class="LineNr"> 52 </span> <span class="subxS1Comment"># . eax = kernel-string-equal?(argv[1], "test")</span>
<span id="L53" class="LineNr"> 53 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L54" class="LineNr"> 54 </span> 68/push <span class="Constant">"test"</span>/imm32
<span id="L55" class="LineNr"> 55 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span>
<span id="L56" class="LineNr"> 56 </span> <span class="subxS2Comment"># . . call</span>
<span id="L57" class="LineNr"> 57 </span> e8/call <a href='103kernel-string-equal.subx.html#L31'>kernel-string-equal?</a>/disp32
<span id="L58" class="LineNr"> 58 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L59" class="LineNr"> 59 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L60" class="LineNr"> 60 </span> <span class="subxS1Comment"># . if (eax == false) goto run-main</span>
<span id="L61" class="LineNr"> 61 </span> 3d/compare-eax-and 0/imm32/false
<span id="L62" class="LineNr"> 62 </span> 74/jump-if-= $run-main/disp8
<span id="L63" class="LineNr"> 63 </span> <span class="subxComment"># run-tests()</span>
<span id="L64" class="LineNr"> 64 </span> e8/call run-tests/disp32
<span id="L65" class="LineNr"> 65 </span> <span class="subxComment"># syscall(exit, *Num-test-failures)</span>
<span id="L66" class="LineNr"> 66 </span> 8b/copy 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/ebx <span class="SpecialChar"><a href='102test.subx.html#L89'>Num-test-failures</a></span>/disp32 <span class="subxComment"># copy *Num-test-failures to ebx</span>
<span id="L67" class="LineNr"> 67 </span> eb/jump $main:end/disp8
<span id="L68" class="LineNr"> 68 </span><span class="Constant">$run-main</span>:
<span id="L69" class="LineNr"> 69 </span> <span class="subxH1Comment"># - otherwise read a program from stdin and emit its translation to stdout</span>
<span id="L70" class="LineNr"> 70 </span> <span class="subxS1Comment"># . compile(Stdin, 1/stdout, 2/stderr, 0)</span>
<span id="L71" class="LineNr"> 71 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L72" class="LineNr"> 72 </span> 68/push 0/imm32/exit-descriptor
<span id="L73" class="LineNr"> 73 </span> 68/push 2/imm32/stderr
<span id="L74" class="LineNr"> 74 </span> 68/push 1/imm32/stdout
<span id="L75" class="LineNr"> 75 </span> 68/push <span class="SpecialChar"><a href='112read-byte.subx.html#L14'>Stdin</a></span>/imm32
<span id="L76" class="LineNr"> 76 </span> <span class="subxS2Comment"># . . call</span>
<span id="L77" class="LineNr"> 77 </span> e8/call <a href='crenshaw2-1b.subx.html#L86'>compile</a>/disp32
<span id="L78" class="LineNr"> 78 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L79" class="LineNr"> 79 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0x10/imm32 <span class="subxComment"># add to esp</span>
<span id="L80" class="LineNr"> 80 </span> <span class="subxComment"># syscall(exit, 0)</span>
<span id="L81" class="LineNr"> 81 </span> bb/copy-to-ebx 0/imm32
<span id="L82" class="LineNr"> 82 </span><span class="Constant">$main:end</span>:
<span id="L83" class="LineNr"> 83 </span> e8/call <a href='000init.subx.html#L18'>syscall_exit</a>/disp32
<span id="L84" class="LineNr"> 84 </span>
<span id="L85" class="LineNr"> 85 </span><span class="subxComment"># the main entry point</span>
<span id="L86" class="LineNr"> 86 </span><span class="subxFunction">compile</span>: <span class="subxComment"># in: (addr buffered-file), out: fd or (addr stream byte), err: fd or (addr stream byte), ed: (addr exit-descriptor)</span>
<span id="L87" class="LineNr"> 87 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L88" class="LineNr"> 88 </span> 55/push-ebp
<span id="L89" class="LineNr"> 89 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L90" class="LineNr"> 90 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L91" class="LineNr"> 91 </span> 50/push-eax
<span id="L92" class="LineNr"> 92 </span> 51/push-ecx
<span id="L93" class="LineNr"> 93 </span> <span class="subxComment"># prime the pump</span>
<span id="L94" class="LineNr"> 94 </span> <span class="subxS1Comment"># . Look = get-char(in)</span>
<span id="L95" class="LineNr"> 95 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L96" class="LineNr"> 96 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span>
<span id="L97" class="LineNr"> 97 </span> <span class="subxS2Comment"># . . call</span>
<span id="L98" class="LineNr"> 98 </span> e8/call <a href='crenshaw2-1b.subx.html#L702'>get-char</a>/disp32
<span id="L99" class="LineNr"> 99 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L100" class="LineNr">100 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L101" class="LineNr">101 </span> <span class="subxComment"># var num/ecx: (stream byte 7)</span>
<span id="L102" class="LineNr">102 </span> <span class="subxComment"># Numbers can be 32 bits or 8 hex bytes long. One of them will be in 'Look', so we need space for 7 bytes.</span>
<span id="L103" class="LineNr">103 </span> <span class="subxComment"># Sizing the stream just right buys us overflow-handling for free inside 'get-num'.</span>
<span id="L104" class="LineNr">104 </span> <span class="subxComment"># Add 12 bytes for 'read', 'write' and 'size' fields, for a total of 19 bytes, or 0x13 in hex.</span>
<span id="L105" class="LineNr">105 </span> <span class="subxComment"># The stack pointer is no longer aligned, so dump_stack() can be misleading past this point.</span>
<span id="L106" class="LineNr">106 </span> 81 5/subop/subtract 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0x13/imm32 <span class="subxComment"># subtract from esp</span>
<span id="L107" class="LineNr">107 </span> 89/copy 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ecx</span>
<span id="L108" class="LineNr">108 </span> <span class="subxComment"># initialize the stream</span>
<span id="L109" class="LineNr">109 </span> <span class="subxS1Comment"># . num->size = 7</span>
<span id="L110" class="LineNr">110 </span> c7 0/subop/copy 1/mod/*+disp8 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 7/imm32 <span class="subxComment"># copy to *(ecx+8)</span>
<span id="L111" class="LineNr">111 </span> <span class="subxS1Comment"># . clear-stream(num)</span>
<span id="L112" class="LineNr">112 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L113" class="LineNr">113 </span> 51/push-ecx
<span id="L114" class="LineNr">114 </span> <span class="subxS2Comment"># . . call</span>
<span id="L115" class="LineNr">115 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L116" class="LineNr">116 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L117" class="LineNr">117 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L118" class="LineNr">118 </span> <span class="subxComment"># read a digit from 'in' into 'num'</span>
<span id="L119" class="LineNr">119 </span> <span class="subxS1Comment"># . get-num(in, num, err, ed)</span>
<span id="L120" class="LineNr">120 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L121" class="LineNr">121 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0x14/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+20)</span>
<span id="L122" class="LineNr">122 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+16)</span>
<span id="L123" class="LineNr">123 </span> 51/push-ecx/num
<span id="L124" class="LineNr">124 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span>
<span id="L125" class="LineNr">125 </span> <span class="subxS2Comment"># . . call</span>
<span id="L126" class="LineNr">126 </span> e8/call <a href='crenshaw2-1b.subx.html#L187'>get-num</a>/disp32
<span id="L127" class="LineNr">127 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L128" class="LineNr">128 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0x10/imm32 <span class="subxComment"># add to esp</span>
<span id="L129" class="LineNr">129 </span> <span class="subxComment"># render 'num' into the following template on 'out':</span>
<span id="L130" class="LineNr">130 </span> <span class="subxComment"># bb/copy-to-ebx _num_</span>
<span id="L131" class="LineNr">131 </span> <span class="subxComment"># b8/copy-to-eax 1/imm32/exit</span>
<span id="L132" class="LineNr">132 </span> <span class="subxComment"># cd/syscall 0x80/imm8</span>
<span id="L133" class="LineNr">133 </span> <span class="subxComment">#</span>
<span id="L134" class="LineNr">134 </span> <span class="subxS1Comment"># . write(out, "bb/copy-to-ebx ")</span>
<span id="L135" class="LineNr">135 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L136" class="LineNr">136 </span> 68/push <span class="Constant">"bb/copy-to-ebx "</span>/imm32
<span id="L137" class="LineNr">137 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+12)</span>
<span id="L138" class="LineNr">138 </span> <span class="subxS2Comment"># . . call</span>
<span id="L139" class="LineNr">139 </span> e8/call <a href='108write.subx.html#L24'>write</a>/disp32
<span id="L140" class="LineNr">140 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L141" class="LineNr">141 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L142" class="LineNr">142 </span> <span class="subxS1Comment"># . write-stream(out, num)</span>
<span id="L143" class="LineNr">143 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L144" class="LineNr">144 </span> 51/push-ecx/num
<span id="L145" class="LineNr">145 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+12)</span>
<span id="L146" class="LineNr">146 </span> <span class="subxS2Comment"># . . call</span>
<span id="L147" class="LineNr">147 </span> e8/call <a href='113write-stream.subx.html#L17'>write-stream</a>/disp32
<span id="L148" class="LineNr">148 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L149" class="LineNr">149 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L150" class="LineNr">150 </span> <span class="subxS1Comment"># . write(out, Newline)</span>
<span id="L151" class="LineNr">151 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L152" class="LineNr">152 </span> 68/push <span class="SpecialChar"><a href='102test.subx.html#L82'>Newline</a></span>/imm32
<span id="L153" class="LineNr">153 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+12)</span>
<span id="L154" class="LineNr">154 </span> <span class="subxS2Comment"># . . call</span>
<span id="L155" class="LineNr">155 </span> e8/call <a href='108write.subx.html#L24'>write</a>/disp32
<span id="L156" class="LineNr">156 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L157" class="LineNr">157 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L158" class="LineNr">158 </span> <span class="subxS1Comment"># . write(out, "b8/copy-to-eax 1/imm32/exit\n")</span>
<span id="L159" class="LineNr">159 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L160" class="LineNr">160 </span> 68/push <span class="Constant">"b8/copy-to-eax 1/imm32/exit\n"</span>/imm32
<span id="L161" class="LineNr">161 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+12)</span>
<span id="L162" class="LineNr">162 </span> <span class="subxS2Comment"># . . call</span>
<span id="L163" class="LineNr">163 </span> e8/call <a href='108write.subx.html#L24'>write</a>/disp32
<span id="L164" class="LineNr">164 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L165" class="LineNr">165 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L166" class="LineNr">166 </span> <span class="subxS1Comment"># . write(out, "cd/syscall 0x80/imm8\n")</span>
<span id="L167" class="LineNr">167 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L168" class="LineNr">168 </span> 68/push <span class="Constant">"cd/syscall 0x80/imm8\n"</span>/imm32
<span id="L169" class="LineNr">169 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+12)</span>
<span id="L170" class="LineNr">170 </span> <span class="subxS2Comment"># . . call</span>
<span id="L171" class="LineNr">171 </span> e8/call <a href='108write.subx.html#L24'>write</a>/disp32
<span id="L172" class="LineNr">172 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L173" class="LineNr">173 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L174" class="LineNr">174 </span><span class="Constant">$compile:end</span>:
<span id="L175" class="LineNr">175 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L176" class="LineNr">176 </span> 59/pop-to-ecx
<span id="L177" class="LineNr">177 </span> 58/pop-to-eax
<span id="L178" class="LineNr">178 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L179" class="LineNr">179 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L180" class="LineNr">180 </span> 5d/pop-to-ebp
<span id="L181" class="LineNr">181 </span> c3/return
<span id="L182" class="LineNr">182 </span>
<span id="L183" class="LineNr">183 </span><span class="subxComment"># Read a sequence of digits into 'out'. Abort if there are none, or if there is</span>
<span id="L184" class="LineNr">184 </span><span class="subxComment"># no space in 'out'.</span>
<span id="L185" class="LineNr">185 </span><span class="subxComment"># Input comes from the global variable 'Look' (first byte) and the argument</span>
<span id="L186" class="LineNr">186 </span><span class="subxComment"># 'in' (rest). We leave the next byte from 'in' into 'Look' on exit.</span>
<span id="L187" class="LineNr">187 </span><span class="subxFunction">get-num</span>: <span class="subxComment"># in: (addr buffered-file), out: (addr stream byte), err: fd or (addr stream byte), ed: (addr exit-descriptor)</span>
<span id="L188" class="LineNr">188 </span> <span class="subxComment"># pseudocode:</span>
<span id="L189" class="LineNr">189 </span> <span class="subxComment"># if (!digit?(Look)) expected(ed, err, "integer")</span>
<span id="L190" class="LineNr">190 </span> <span class="subxComment"># do</span>
<span id="L191" class="LineNr">191 </span> <span class="subxComment"># if out->write >= out->size</span>
<span id="L192" class="LineNr">192 </span> <span class="subxComment"># write(err, "Error: too many digits in number\n")</span>
<span id="L193" class="LineNr">193 </span> <span class="subxComment"># stop(ed, 1)</span>
<span id="L194" class="LineNr">194 </span> <span class="subxComment"># out->data[out->write] = LSB(Look)</span>
<span id="L195" class="LineNr">195 </span> <span class="subxComment"># ++out->write</span>
<span id="L196" class="LineNr">196 </span> <span class="subxComment"># Look = get-char(in)</span>
<span id="L197" class="LineNr">197 </span> <span class="subxComment"># while digit?(Look)</span>
<span id="L198" class="LineNr">198 </span> <span class="subxComment"># This is complicated because I don't want to hard-code the error strategy in</span>
<span id="L199" class="LineNr">199 </span> <span class="subxComment"># a general helper like write-byte-buffered. Maybe I should just create a</span>
<span id="L200" class="LineNr">200 </span> <span class="subxComment"># local helper.</span>
<span id="L201" class="LineNr">201 </span> <span class="subxComment">#</span>
<span id="L202" class="LineNr">202 </span> <span class="subxComment"># within the loop we'll try to keep things in registers:</span>
<span id="L203" class="LineNr">203 </span> <span class="subxComment"># in: esi</span>
<span id="L204" class="LineNr">204 </span> <span class="subxComment"># out: edi</span>
<span id="L205" class="LineNr">205 </span> <span class="subxComment"># out->write: ecx (cached copy; need to keep in sync)</span>
<span id="L206" class="LineNr">206 </span> <span class="subxComment"># out->size: edx</span>
<span id="L207" class="LineNr">207 </span> <span class="subxComment"># temporaries: eax, ebx</span>
<span id="L208" class="LineNr">208 </span> <span class="subxComment"># We can't allocate Look to a register because it gets written implicitly in</span>
<span id="L209" class="LineNr">209 </span> <span class="subxComment"># get-char in each iteration of the loop. (Thereby demonstrating that it's</span>
<span id="L210" class="LineNr">210 </span> <span class="subxComment"># not the right interface for us. But we'll keep it just to follow Crenshaw.)</span>
<span id="L211" class="LineNr">211 </span> <span class="subxComment">#</span>
<span id="L212" class="LineNr">212 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L213" class="LineNr">213 </span> 55/push-ebp
<span id="L214" class="LineNr">214 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L215" class="LineNr">215 </span> <span class="subxH1Comment"># - if (digit?(Look)) expected(ed, err, "integer")</span>
<span id="L216" class="LineNr">216 </span> <span class="subxS1Comment"># . eax = digit?(Look)</span>
<span id="L217" class="LineNr">217 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L218" class="LineNr">218 </span> ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="SpecialChar"><a href='crenshaw2-1b.subx.html#L747'>Look</a></span>/disp32 <span class="Normal"> . </span> <span class="subxComment"># push *Look</span>
<span id="L219" class="LineNr">219 </span> <span class="subxS2Comment"># . . call</span>
<span id="L220" class="LineNr">220 </span> e8/call <a href='crenshaw2-1b.subx.html#L725'>digit?</a>/disp32
<span id="L221" class="LineNr">221 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L222" class="LineNr">222 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L223" class="LineNr">223 </span> <span class="subxS1Comment"># . if (eax == false)</span>
<span id="L224" class="LineNr">224 </span> 3d/compare-eax-and 0/imm32/false
<span id="L225" class="LineNr">225 </span> 75/jump-if-!= $get-num:main/disp8
<span id="L226" class="LineNr">226 </span> <span class="subxS1Comment"># . expected(ed, err, "integer")</span>
<span id="L227" class="LineNr">227 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L228" class="LineNr">228 </span> 68/push <span class="Constant">"integer"</span>/imm32
<span id="L229" class="LineNr">229 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+16)</span>
<span id="L230" class="LineNr">230 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0x14/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+20)</span>
<span id="L231" class="LineNr">231 </span> <span class="subxS2Comment"># . . call</span>
<span id="L232" class="LineNr">232 </span> e8/call <a href='crenshaw2-1b.subx.html#L660'>expected</a>/disp32 <span class="subxComment"># never returns</span>
<span id="L233" class="LineNr">233 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L234" class="LineNr">234 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L235" class="LineNr">235 </span><span class="Constant">$get-num:main</span>:
<span id="L236" class="LineNr">236 </span> <span class="subxH1Comment"># - otherwise read a digit</span>
<span id="L237" class="LineNr">237 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L238" class="LineNr">238 </span> 50/push-eax
<span id="L239" class="LineNr">239 </span> 51/push-ecx
<span id="L240" class="LineNr">240 </span> 52/push-edx
<span id="L241" class="LineNr">241 </span> 53/push-ebx
<span id="L242" class="LineNr">242 </span> 56/push-esi
<span id="L243" class="LineNr">243 </span> 57/push-edi
<span id="L244" class="LineNr">244 </span> <span class="subxComment"># read necessary variables to registers</span>
<span id="L245" class="LineNr">245 </span> <span class="subxComment"># esi = in</span>
<span id="L246" class="LineNr">246 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 6/r32/esi 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to esi</span>
<span id="L247" class="LineNr">247 </span> <span class="subxComment"># edi = out</span>
<span id="L248" class="LineNr">248 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 7/r32/edi 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+12) to edi</span>
<span id="L249" class="LineNr">249 </span> <span class="subxComment"># ecx = out->write</span>
<span id="L250" class="LineNr">250 </span> 8b/copy 0/mod/indirect 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *edi to ecx</span>
<span id="L251" class="LineNr">251 </span> <span class="subxComment"># edx = out->size</span>
<span id="L252" class="LineNr">252 </span> 8b/copy 1/mod/*+disp8 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(edi+8) to edx</span>
<span id="L253" class="LineNr">253 </span><span class="Constant">$get-num:loop</span>:
<span id="L254" class="LineNr">254 </span> <span class="subxComment"># if (out->write >= out->size) error</span>
<span id="L255" class="LineNr">255 </span> 39/compare 3/mod/direct 2/rm32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># compare edx with ecx</span>
<span id="L256" class="LineNr">256 </span> 7d/jump-if-< $get-num:loop-stage2/disp8
<span id="L257" class="LineNr">257 </span> <span class="subxS1Comment"># . error(ed, err, msg) # TODO: show full number</span>
<span id="L258" class="LineNr">258 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L259" class="LineNr">259 </span> 68/push <span class="Constant">"get-num: too many digits in number"</span>/imm32
<span id="L260" class="LineNr">260 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+16)</span>
<span id="L261" class="LineNr">261 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0x14/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+20)</span>
<span id="L262" class="LineNr">262 </span> <span class="subxS2Comment"># . . call</span>
<span id="L263" class="LineNr">263 </span> e8/call <a href='114error.subx.html#L9'>error</a>/disp32 <span class="subxComment"># never returns</span>
<span id="L264" class="LineNr">264 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L265" class="LineNr">265 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L266" class="LineNr">266 </span><span class="Constant">$get-num:loop-stage2</span>:
<span id="L267" class="LineNr">267 </span> <span class="subxComment"># out->data[out->write] = LSB(Look)</span>
<span id="L268" class="LineNr">268 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 7/base/edi 1/index/ecx <span class="Normal"> . </span> 3/r32/ebx 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy edi+ecx+12 to ebx</span>
<span id="L269" class="LineNr">269 </span> 8b/copy 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="SpecialChar"><a href='crenshaw2-1b.subx.html#L747'>Look</a></span>/disp32 <span class="Normal"> . </span> <span class="subxComment"># copy *Look to eax</span>
<span id="L270" class="LineNr">270 </span> 88/copy-byte 0/mod/indirect 3/rm32/ebx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/AL <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy byte at AL to *ebx</span>
<span id="L271" class="LineNr">271 </span> <span class="subxComment"># ++out->write</span>
<span id="L272" class="LineNr">272 </span> 41/increment-ecx
<span id="L273" class="LineNr">273 </span> <span class="subxComment"># Look = get-char(in)</span>
<span id="L274" class="LineNr">274 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L275" class="LineNr">275 </span> 56/push-esi
<span id="L276" class="LineNr">276 </span> <span class="subxS2Comment"># . . call</span>
<span id="L277" class="LineNr">277 </span> e8/call <a href='crenshaw2-1b.subx.html#L702'>get-char</a>/disp32
<span id="L278" class="LineNr">278 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L279" class="LineNr">279 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L280" class="LineNr">280 </span> <span class="subxComment"># if (digit?(Look)) loop</span>
<span id="L281" class="LineNr">281 </span> <span class="subxS1Comment"># . eax = digit?(Look)</span>
<span id="L282" class="LineNr">282 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L283" class="LineNr">283 </span> ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="SpecialChar"><a href='crenshaw2-1b.subx.html#L747'>Look</a></span>/disp32 <span class="Normal"> . </span> <span class="subxComment"># push *Look</span>
<span id="L284" class="LineNr">284 </span> <span class="subxS2Comment"># . . call</span>
<span id="L285" class="LineNr">285 </span> e8/call <a href='crenshaw2-1b.subx.html#L725'>digit?</a>/disp32
<span id="L286" class="LineNr">286 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L287" class="LineNr">287 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L288" class="LineNr">288 </span> <span class="subxS1Comment"># . if (eax != false) loop</span>
<span id="L289" class="LineNr">289 </span> 3d/compare-eax-and 0/imm32/false
<span id="L290" class="LineNr">290 </span> 0f 85/jump-if-!= $get-num:<span class="Constant">loop</span>/disp32
<span id="L291" class="LineNr">291 </span><span class="Constant">$get-num:loop-end</span>:
<span id="L292" class="LineNr">292 </span> <span class="subxComment"># persist necessary variables from registers</span>
<span id="L293" class="LineNr">293 </span> 89/copy 0/mod/indirect 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ecx to *edi</span>
<span id="L294" class="LineNr">294 </span><span class="Constant">$get-num:end</span>:
<span id="L295" class="LineNr">295 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L296" class="LineNr">296 </span> 5f/pop-to-edi
<span id="L297" class="LineNr">297 </span> 5e/pop-to-esi
<span id="L298" class="LineNr">298 </span> 5b/pop-to-ebx
<span id="L299" class="LineNr">299 </span> 5a/pop-to-edx
<span id="L300" class="LineNr">300 </span> 59/pop-to-ecx
<span id="L301" class="LineNr">301 </span> 58/pop-to-eax
<span id="L302" class="LineNr">302 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L303" class="LineNr">303 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L304" class="LineNr">304 </span> 5d/pop-to-ebp
<span id="L305" class="LineNr">305 </span> c3/return
<span id="L306" class="LineNr">306 </span>
<span id="L307" class="LineNr">307 </span><span class="subxTest">test-get-num-reads-single-digit</span>:
<span id="L308" class="LineNr">308 </span> <span class="subxH1Comment"># - check that get-num returns first character if it's a digit</span>
<span id="L309" class="LineNr">309 </span> <span class="subxComment"># This test uses exit-descriptors. Use ebp for setting up local variables.</span>
<span id="L310" class="LineNr">310 </span> 55/push-ebp
<span id="L311" class="LineNr">311 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L312" class="LineNr">312 </span> <span class="subxComment"># clear all streams</span>
<span id="L313" class="LineNr">313 </span> <span class="subxS1Comment"># . clear-stream(_test-stream)</span>
<span id="L314" class="LineNr">314 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L315" class="LineNr">315 </span> 68/push <a href='108write.subx.html#L151'>_test-stream</a>/imm32
<span id="L316" class="LineNr">316 </span> <span class="subxS2Comment"># . . call</span>
<span id="L317" class="LineNr">317 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L318" class="LineNr">318 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L319" class="LineNr">319 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L320" class="LineNr">320 </span> <span class="subxS1Comment"># . clear-stream($_test-buffered-file->buffer)</span>
<span id="L321" class="LineNr">321 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L322" class="LineNr">322 </span> 68/push $_test-buffered-file->buffer/imm32
<span id="L323" class="LineNr">323 </span> <span class="subxS2Comment"># . . call</span>
<span id="L324" class="LineNr">324 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L325" class="LineNr">325 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L326" class="LineNr">326 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L327" class="LineNr">327 </span> <span class="subxS1Comment"># . clear-stream(_test-output-stream)</span>
<span id="L328" class="LineNr">328 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L329" class="LineNr">329 </span> 68/push <a href='115write-byte.subx.html#L287'>_test-output-stream</a>/imm32
<span id="L330" class="LineNr">330 </span> <span class="subxS2Comment"># . . call</span>
<span id="L331" class="LineNr">331 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L332" class="LineNr">332 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L333" class="LineNr">333 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L334" class="LineNr">334 </span> <span class="subxS1Comment"># . clear-stream(_test-error-stream)</span>
<span id="L335" class="LineNr">335 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L336" class="LineNr">336 </span> 68/push <a href='115write-byte.subx.html#L438'>_test-error-stream</a>/imm32
<span id="L337" class="LineNr">337 </span> <span class="subxS2Comment"># . . call</span>
<span id="L338" class="LineNr">338 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L339" class="LineNr">339 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L340" class="LineNr">340 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L341" class="LineNr">341 </span> <span class="subxComment"># initialize 'in'</span>
<span id="L342" class="LineNr">342 </span> <span class="subxS1Comment"># . write(_test-stream, "3")</span>
<span id="L343" class="LineNr">343 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L344" class="LineNr">344 </span> 68/push <span class="Constant">"3"</span>/imm32
<span id="L345" class="LineNr">345 </span> 68/push <a href='108write.subx.html#L151'>_test-stream</a>/imm32
<span id="L346" class="LineNr">346 </span> <span class="subxS2Comment"># . . call</span>
<span id="L347" class="LineNr">347 </span> e8/call <a href='108write.subx.html#L24'>write</a>/disp32
<span id="L348" class="LineNr">348 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L349" class="LineNr">349 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L350" class="LineNr">350 </span> <span class="subxComment"># initialize exit-descriptor 'ed' for the call to 'get-num' below</span>
<span id="L351" class="LineNr">351 </span> <span class="subxS1Comment"># . var ed/eax: exit-descriptor</span>
<span id="L352" class="LineNr">352 </span> 81 5/subop/subtract 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># subtract from esp</span>
<span id="L353" class="LineNr">353 </span> 89/copy 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to eax</span>
<span id="L354" class="LineNr">354 </span> <span class="subxS1Comment"># . tailor-exit-descriptor(ed, 16)</span>
<span id="L355" class="LineNr">355 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L356" class="LineNr">356 </span> 68/push 0x10/imm32/nbytes-of-args-for-get-num
<span id="L357" class="LineNr">357 </span> 50/push-eax/ed
<span id="L358" class="LineNr">358 </span> <span class="subxS2Comment"># . . call</span>
<span id="L359" class="LineNr">359 </span> e8/call <a href='110stop.subx.html#L44'>tailor-exit-descriptor</a>/disp32
<span id="L360" class="LineNr">360 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L361" class="LineNr">361 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L362" class="LineNr">362 </span> <span class="subxComment"># prime the pump</span>
<span id="L363" class="LineNr">363 </span> <span class="subxS1Comment"># . get-char(_test-buffered-file)</span>
<span id="L364" class="LineNr">364 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L365" class="LineNr">365 </span> 68/push <a href='112read-byte.subx.html#L318'>_test-buffered-file</a>/imm32
<span id="L366" class="LineNr">366 </span> <span class="subxS2Comment"># . . call</span>
<span id="L367" class="LineNr">367 </span> e8/call <a href='crenshaw2-1b.subx.html#L702'>get-char</a>/disp32
<span id="L368" class="LineNr">368 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L369" class="LineNr">369 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L370" class="LineNr">370 </span> <span class="subxComment"># get-num(in, out, err, ed)</span>
<span id="L371" class="LineNr">371 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L372" class="LineNr">372 </span> 50/push-eax/ed
<span id="L373" class="LineNr">373 </span> 68/push <a href='115write-byte.subx.html#L438'>_test-error-stream</a>/imm32
<span id="L374" class="LineNr">374 </span> 68/push <a href='115write-byte.subx.html#L287'>_test-output-stream</a>/imm32
<span id="L375" class="LineNr">375 </span> 68/push <a href='112read-byte.subx.html#L318'>_test-buffered-file</a>/imm32
<span id="L376" class="LineNr">376 </span> <span class="subxS2Comment"># . . call</span>
<span id="L377" class="LineNr">377 </span> e8/call <a href='crenshaw2-1b.subx.html#L187'>get-num</a>/disp32
<span id="L378" class="LineNr">378 </span> <span class="subxComment"># registers except esp may be clobbered at this point</span>
<span id="L379" class="LineNr">379 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L380" class="LineNr">380 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0x10/imm32 <span class="subxComment"># add to esp</span>
<span id="L381" class="LineNr">381 </span> <span class="subxComment"># check-ints-equal(*_test-output-stream->data, '3', msg)</span>
<span id="L382" class="LineNr">382 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L383" class="LineNr">383 </span> 68/push <span class="Constant">"F - test-get-num-reads-single-digit"</span>/imm32
<span id="L384" class="LineNr">384 </span> 68/push 0x33/imm32
<span id="L385" class="LineNr">385 </span> b8/copy-to-eax <a href='115write-byte.subx.html#L287'>_test-output-stream</a>/imm32
<span id="L386" class="LineNr">386 </span> ff 6/subop/push 1/mod/*+disp8 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(eax+12)</span>
<span id="L387" class="LineNr">387 </span> <span class="subxS2Comment"># . . call</span>
<span id="L388" class="LineNr">388 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
<span id="L389" class="LineNr">389 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L390" class="LineNr">390 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L391" class="LineNr">391 </span> <span class="subxS1Comment"># . reclaim locals</span>
<span id="L392" class="LineNr">392 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L393" class="LineNr">393 </span> 5d/pop-to-ebp
<span id="L394" class="LineNr">394 </span> c3/return
<span id="L395" class="LineNr">395 </span>
<span id="L396" class="LineNr">396 </span><span class="subxTest">test-get-num-aborts-on-non-digit-in-Look</span>:
<span id="L397" class="LineNr">397 </span> <span class="subxH1Comment"># - check that get-num returns first character if it's a digit</span>
<span id="L398" class="LineNr">398 </span> <span class="subxComment"># This test uses exit-descriptors. Use ebp for setting up local variables.</span>
<span id="L399" class="LineNr">399 </span> 55/push-ebp
<span id="L400" class="LineNr">400 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L401" class="LineNr">401 </span> <span class="subxComment"># clear all streams</span>
<span id="L402" class="LineNr">402 </span> <span class="subxS1Comment"># . clear-stream(_test-stream)</span>
<span id="L403" class="LineNr">403 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L404" class="LineNr">404 </span> 68/push <a href='108write.subx.html#L151'>_test-stream</a>/imm32
<span id="L405" class="LineNr">405 </span> <span class="subxS2Comment"># . . call</span>
<span id="L406" class="LineNr">406 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L407" class="LineNr">407 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L408" class="LineNr">408 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L409" class="LineNr">409 </span> <span class="subxS1Comment"># . clear-stream($_test-buffered-file->buffer)</span>
<span id="L410" class="LineNr">410 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L411" class="LineNr">411 </span> 68/push $_test-buffered-file->buffer/imm32
<span id="L412" class="LineNr">412 </span> <span class="subxS2Comment"># . . call</span>
<span id="L413" class="LineNr">413 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L414" class="LineNr">414 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L415" class="LineNr">415 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L416" class="LineNr">416 </span> <span class="subxS1Comment"># . clear-stream(_test-output-stream)</span>
<span id="L417" class="LineNr">417 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L418" class="LineNr">418 </span> 68/push <a href='115write-byte.subx.html#L287'>_test-output-stream</a>/imm32
<span id="L419" class="LineNr">419 </span> <span class="subxS2Comment"># . . call</span>
<span id="L420" class="LineNr">420 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L421" class="LineNr">421 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L422" class="LineNr">422 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L423" class="LineNr">423 </span> <span class="subxS1Comment"># . clear-stream(_test-error-stream)</span>
<span id="L424" class="LineNr">424 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L425" class="LineNr">425 </span> 68/push <a href='115write-byte.subx.html#L438'>_test-error-stream</a>/imm32
<span id="L426" class="LineNr">426 </span> <span class="subxS2Comment"># . . call</span>
<span id="L427" class="LineNr">427 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L428" class="LineNr">428 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L429" class="LineNr">429 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L430" class="LineNr">430 </span> <span class="subxComment"># initialize 'in'</span>
<span id="L431" class="LineNr">431 </span> <span class="subxS1Comment"># . write(_test-stream, "3")</span>
<span id="L432" class="LineNr">432 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L433" class="LineNr">433 </span> 68/push <span class="Constant">"3"</span>/imm32
<span id="L434" class="LineNr">434 </span> 68/push <a href='108write.subx.html#L151'>_test-stream</a>/imm32
<span id="L435" class="LineNr">435 </span> <span class="subxS2Comment"># . . call</span>
<span id="L436" class="LineNr">436 </span> e8/call <a href='108write.subx.html#L24'>write</a>/disp32
<span id="L437" class="LineNr">437 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L438" class="LineNr">438 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L439" class="LineNr">439 </span> <span class="subxComment"># initialize exit-descriptor 'ed' for the call to 'get-num' below</span>
<span id="L440" class="LineNr">440 </span> <span class="subxS1Comment"># . var ed/eax: exit-descriptor</span>
<span id="L441" class="LineNr">441 </span> 81 5/subop/subtract 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># subtract from esp</span>
<span id="L442" class="LineNr">442 </span> 89/copy 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to eax</span>
<span id="L443" class="LineNr">443 </span> <span class="subxS1Comment"># . tailor-exit-descriptor(ed, 16)</span>
<span id="L444" class="LineNr">444 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L445" class="LineNr">445 </span> 68/push 0x10/imm32/nbytes-of-args-for-get-num
<span id="L446" class="LineNr">446 </span> 50/push-eax/ed
<span id="L447" class="LineNr">447 </span> <span class="subxS2Comment"># . . call</span>
<span id="L448" class="LineNr">448 </span> e8/call <a href='110stop.subx.html#L44'>tailor-exit-descriptor</a>/disp32
<span id="L449" class="LineNr">449 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L450" class="LineNr">450 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L451" class="LineNr">451 </span> <span class="subxComment"># *don't* prime the pump</span>
<span id="L452" class="LineNr">452 </span> <span class="subxComment"># get-num(in, out, err, ed)</span>
<span id="L453" class="LineNr">453 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L454" class="LineNr">454 </span> 50/push-eax/ed
<span id="L455" class="LineNr">455 </span> 68/push <a href='115write-byte.subx.html#L438'>_test-error-stream</a>/imm32
<span id="L456" class="LineNr">456 </span> 68/push <a href='115write-byte.subx.html#L287'>_test-output-stream</a>/imm32
<span id="L457" class="LineNr">457 </span> 68/push <a href='112read-byte.subx.html#L318'>_test-buffered-file</a>/imm32
<span id="L458" class="LineNr">458 </span> <span class="subxS2Comment"># . . call</span>
<span id="L459" class="LineNr">459 </span> e8/call <a href='crenshaw2-1b.subx.html#L187'>get-num</a>/disp32
<span id="L460" class="LineNr">460 </span> <span class="subxComment"># registers except esp may be clobbered at this point</span>
<span id="L461" class="LineNr">461 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L462" class="LineNr">462 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0x10/imm32 <span class="subxComment"># add to esp</span>
<span id="L463" class="LineNr">463 </span> <span class="subxComment"># check that get-num tried to call exit(1)</span>
<span id="L464" class="LineNr">464 </span> <span class="subxS1Comment"># . check-ints-equal(ed->value, 2, msg) # i.e. stop was called with value 1</span>
<span id="L465" class="LineNr">465 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L466" class="LineNr">466 </span> 68/push <span class="Constant">"F - test-get-num-aborts-on-non-digit-in-Look"</span>/imm32
<span id="L467" class="LineNr">467 </span> 68/push 2/imm32
<span id="L468" class="LineNr">468 </span> <span class="subxS2Comment"># . . push ed->value</span>
<span id="L469" class="LineNr">469 </span> ff 6/subop/push 1/mod/*+disp8 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(eax+4)</span>
<span id="L470" class="LineNr">470 </span> <span class="subxS2Comment"># . . call</span>
<span id="L471" class="LineNr">471 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
<span id="L472" class="LineNr">472 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L473" class="LineNr">473 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L474" class="LineNr">474 </span> <span class="subxS1Comment"># . reclaim locals</span>
<span id="L475" class="LineNr">475 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L476" class="LineNr">476 </span> 5d/pop-to-ebp
<span id="L477" class="LineNr">477 </span> c3/return
<span id="L478" class="LineNr">478 </span>
<span id="L479" class="LineNr">479 </span><span class="subxTest">test-get-num-reads-multiple-digits</span>:
<span id="L480" class="LineNr">480 </span> <span class="subxH1Comment"># - check that get-num returns all initial digits until it encounters a non-digit</span>
<span id="L481" class="LineNr">481 </span> <span class="subxComment"># This test uses exit-descriptors. Use ebp for setting up local variables.</span>
<span id="L482" class="LineNr">482 </span> 55/push-ebp
<span id="L483" class="LineNr">483 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L484" class="LineNr">484 </span> <span class="subxComment"># clear all streams</span>
<span id="L485" class="LineNr">485 </span> <span class="subxS1Comment"># . clear-stream(_test-stream)</span>
<span id="L486" class="LineNr">486 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L487" class="LineNr">487 </span> 68/push <a href='108write.subx.html#L151'>_test-stream</a>/imm32
<span id="L488" class="LineNr">488 </span> <span class="subxS2Comment"># . . call</span>
<span id="L489" class="LineNr">489 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L490" class="LineNr">490 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L491" class="LineNr">491 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L492" class="LineNr">492 </span> <span class="subxS1Comment"># . clear-stream($_test-buffered-file->buffer)</span>
<span id="L493" class="LineNr">493 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L494" class="LineNr">494 </span> 68/push $_test-buffered-file->buffer/imm32
<span id="L495" class="LineNr">495 </span> <span class="subxS2Comment"># . . call</span>
<span id="L496" class="LineNr">496 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L497" class="LineNr">497 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L498" class="LineNr">498 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L499" class="LineNr">499 </span> <span class="subxS1Comment"># . clear-stream(_test-output-stream)</span>
<span id="L500" class="LineNr">500 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L501" class="LineNr">501 </span> 68/push <a href='115write-byte.subx.html#L287'>_test-output-stream</a>/imm32
<span id="L502" class="LineNr">502 </span> <span class="subxS2Comment"># . . call</span>
<span id="L503" class="LineNr">503 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L504" class="LineNr">504 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L505" class="LineNr">505 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L506" class="LineNr">506 </span> <span class="subxS1Comment"># . clear-stream(_test-error-stream)</span>
<span id="L507" class="LineNr">507 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L508" class="LineNr">508 </span> 68/push <a href='115write-byte.subx.html#L438'>_test-error-stream</a>/imm32
<span id="L509" class="LineNr">509 </span> <span class="subxS2Comment"># . . call</span>
<span id="L510" class="LineNr">510 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L511" class="LineNr">511 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L512" class="LineNr">512 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L513" class="LineNr">513 </span> <span class="subxComment"># initialize 'in'</span>
<span id="L514" class="LineNr">514 </span> <span class="subxS1Comment"># . write(_test-stream, "3456 x")</span>
<span id="L515" class="LineNr">515 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L516" class="LineNr">516 </span> 68/push <span class="Constant">"3456"</span>/imm32
<span id="L517" class="LineNr">517 </span> 68/push <a href='108write.subx.html#L151'>_test-stream</a>/imm32
<span id="L518" class="LineNr">518 </span> <span class="subxS2Comment"># . . call</span>
<span id="L519" class="LineNr">519 </span> e8/call <a href='108write.subx.html#L24'>write</a>/disp32
<span id="L520" class="LineNr">520 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L521" class="LineNr">521 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L522" class="LineNr">522 </span> <span class="subxComment"># initialize exit-descriptor 'ed' for the call to 'get-num' below</span>
<span id="L523" class="LineNr">523 </span> <span class="subxS1Comment"># . var ed/eax: exit-descriptor</span>
<span id="L524" class="LineNr">524 </span> 81 5/subop/subtract 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># subtract from esp</span>
<span id="L525" class="LineNr">525 </span> 89/copy 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to eax</span>
<span id="L526" class="LineNr">526 </span> <span class="subxS1Comment"># . tailor-exit-descriptor(ed, 16)</span>
<span id="L527" class="LineNr">527 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L528" class="LineNr">528 </span> 68/push 0x10/imm32/nbytes-of-args-for-get-num
<span id="L529" class="LineNr">529 </span> 50/push-eax/ed
<span id="L530" class="LineNr">530 </span> <span class="subxS2Comment"># . . call</span>
<span id="L531" class="LineNr">531 </span> e8/call <a href='110stop.subx.html#L44'>tailor-exit-descriptor</a>/disp32
<span id="L532" class="LineNr">532 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L533" class="LineNr">533 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L534" class="LineNr">534 </span> <span class="subxComment"># prime the pump</span>
<span id="L535" class="LineNr">535 </span> <span class="subxS1Comment"># . get-char(_test-buffered-file)</span>
<span id="L536" class="LineNr">536 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L537" class="LineNr">537 </span> 68/push <a href='112read-byte.subx.html#L318'>_test-buffered-file</a>/imm32
<span id="L538" class="LineNr">538 </span> <span class="subxS2Comment"># . . call</span>
<span id="L539" class="LineNr">539 </span> e8/call <a href='crenshaw2-1b.subx.html#L702'>get-char</a>/disp32
<span id="L540" class="LineNr">540 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L541" class="LineNr">541 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L542" class="LineNr">542 </span> <span class="subxComment"># get-num(in, out, err, ed)</span>
<span id="L543" class="LineNr">543 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L544" class="LineNr">544 </span> 50/push-eax/ed
<span id="L545" class="LineNr">545 </span> 68/push <a href='115write-byte.subx.html#L438'>_test-error-stream</a>/imm32
<span id="L546" class="LineNr">546 </span> 68/push <a href='115write-byte.subx.html#L287'>_test-output-stream</a>/imm32
<span id="L547" class="LineNr">547 </span> 68/push <a href='112read-byte.subx.html#L318'>_test-buffered-file</a>/imm32
<span id="L548" class="LineNr">548 </span> <span class="subxS2Comment"># . . call</span>
<span id="L549" class="LineNr">549 </span> e8/call <a href='crenshaw2-1b.subx.html#L187'>get-num</a>/disp32
<span id="L550" class="LineNr">550 </span> <span class="subxComment"># registers except esp may be clobbered at this point</span>
<span id="L551" class="LineNr">551 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L552" class="LineNr">552 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0x10/imm32 <span class="subxComment"># add to esp</span>
<span id="L553" class="LineNr">553 </span> <span class="subxComment"># check-ints-equal(*_test-output-stream->data, '3456', msg)</span>
<span id="L554" class="LineNr">554 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L555" class="LineNr">555 </span> 68/push <span class="Constant">"F - test-get-num-reads-multiple-digits"</span>/imm32
<span id="L556" class="LineNr">556 </span> 68/push 0x36353433/imm32
<span id="L557" class="LineNr">557 </span> b8/copy-to-eax <a href='115write-byte.subx.html#L287'>_test-output-stream</a>/imm32
<span id="L558" class="LineNr">558 </span> ff 6/subop/push 1/mod/*+disp8 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(eax+12)</span>
<span id="L559" class="LineNr">559 </span> <span class="subxS2Comment"># . . call</span>
<span id="L560" class="LineNr">560 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
<span id="L561" class="LineNr">561 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L562" class="LineNr">562 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L563" class="LineNr">563 </span> <span class="subxS1Comment"># . reclaim locals</span>
<span id="L564" class="LineNr">564 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L565" class="LineNr">565 </span> 5d/pop-to-ebp
<span id="L566" class="LineNr">566 </span> c3/return
<span id="L567" class="LineNr">567 </span>
<span id="L568" class="LineNr">568 </span><span class="subxTest">test-get-num-reads-multiple-digits-followed-by-nondigit</span>:
<span id="L569" class="LineNr">569 </span> <span class="subxH1Comment"># - check that get-num returns all initial digits until it encounters a non-digit</span>
<span id="L570" class="LineNr">570 </span> <span class="subxComment"># This test uses exit-descriptors. Use ebp for setting up local variables.</span>
<span id="L571" class="LineNr">571 </span> 55/push-ebp
<span id="L572" class="LineNr">572 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L573" class="LineNr">573 </span> <span class="subxComment"># clear all streams</span>
<span id="L574" class="LineNr">574 </span> <span class="subxS1Comment"># . clear-stream(_test-stream)</span>
<span id="L575" class="LineNr">575 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L576" class="LineNr">576 </span> 68/push <a href='108write.subx.html#L151'>_test-stream</a>/imm32
<span id="L577" class="LineNr">577 </span> <span class="subxS2Comment"># . . call</span>
<span id="L578" class="LineNr">578 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L579" class="LineNr">579 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L580" class="LineNr">580 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L581" class="LineNr">581 </span> <span class="subxS1Comment"># . clear-stream($_test-buffered-file->buffer)</span>
<span id="L582" class="LineNr">582 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L583" class="LineNr">583 </span> 68/push $_test-buffered-file->buffer/imm32
<span id="L584" class="LineNr">584 </span> <span class="subxS2Comment"># . . call</span>
<span id="L585" class="LineNr">585 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L586" class="LineNr">586 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L587" class="LineNr">587 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L588" class="LineNr">588 </span> <span class="subxS1Comment"># . clear-stream(_test-output-stream)</span>
<span id="L589" class="LineNr">589 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L590" class="LineNr">590 </span> 68/push <a href='115write-byte.subx.html#L287'>_test-output-stream</a>/imm32
<span id="L591" class="LineNr">591 </span> <span class="subxS2Comment"># . . call</span>
<span id="L592" class="LineNr">592 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L593" class="LineNr">593 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L594" class="LineNr">594 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L595" class="LineNr">595 </span> <span class="subxS1Comment"># . clear-stream(_test-error-stream)</span>
<span id="L596" class="LineNr">596 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L597" class="LineNr">597 </span> 68/push <a href='115write-byte.subx.html#L438'>_test-error-stream</a>/imm32
<span id="L598" class="LineNr">598 </span> <span class="subxS2Comment"># . . call</span>
<span id="L599" class="LineNr">599 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L600" class="LineNr">600 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L601" class="LineNr">601 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L602" class="LineNr">602 </span> <span class="subxComment"># initialize 'in'</span>
<span id="L603" class="LineNr">603 </span> <span class="subxS1Comment"># . write(_test-stream, "3456 x")</span>
<span id="L604" class="LineNr">604 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L605" class="LineNr">605 </span> 68/push <span class="Constant">"3456 x"</span>/imm32
<span id="L606" class="LineNr">606 </span> 68/push <a href='108write.subx.html#L151'>_test-stream</a>/imm32
<span id="L607" class="LineNr">607 </span> <span class="subxS2Comment"># . . call</span>
<span id="L608" class="LineNr">608 </span> e8/call <a href='108write.subx.html#L24'>write</a>/disp32
<span id="L609" class="LineNr">609 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L610" class="LineNr">610 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L611" class="LineNr">611 </span> <span class="subxComment"># initialize exit-descriptor 'ed' for the call to 'get-num' below</span>
<span id="L612" class="LineNr">612 </span> <span class="subxS1Comment"># . var ed/eax: exit-descriptor</span>
<span id="L613" class="LineNr">613 </span> 81 5/subop/subtract 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># subtract from esp</span>
<span id="L614" class="LineNr">614 </span> 89/copy 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to eax</span>
<span id="L615" class="LineNr">615 </span> <span class="subxS1Comment"># . tailor-exit-descriptor(ed, 16)</span>
<span id="L616" class="LineNr">616 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L617" class="LineNr">617 </span> 68/push 0x10/imm32/nbytes-of-args-for-get-num
<span id="L618" class="LineNr">618 </span> 50/push-eax/ed
<span id="L619" class="LineNr">619 </span> <span class="subxS2Comment"># . . call</span>
<span id="L620" class="LineNr">620 </span> e8/call <a href='110stop.subx.html#L44'>tailor-exit-descriptor</a>/disp32
<span id="L621" class="LineNr">621 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L622" class="LineNr">622 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L623" class="LineNr">623 </span> <span class="subxComment"># prime the pump</span>
<span id="L624" class="LineNr">624 </span> <span class="subxS1Comment"># . get-char(_test-buffered-file)</span>
<span id="L625" class="LineNr">625 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L626" class="LineNr">626 </span> 68/push <a href='112read-byte.subx.html#L318'>_test-buffered-file</a>/imm32
<span id="L627" class="LineNr">627 </span> <span class="subxS2Comment"># . . call</span>
<span id="L628" class="LineNr">628 </span> e8/call <a href='crenshaw2-1b.subx.html#L702'>get-char</a>/disp32
<span id="L629" class="LineNr">629 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L630" class="LineNr">630 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L631" class="LineNr">631 </span> <span class="subxComment"># get-num(in, out, err, ed)</span>
<span id="L632" class="LineNr">632 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L633" class="LineNr">633 </span> 50/push-eax/ed
<span id="L634" class="LineNr">634 </span> 68/push <a href='115write-byte.subx.html#L438'>_test-error-stream</a>/imm32
<span id="L635" class="LineNr">635 </span> 68/push <a href='115write-byte.subx.html#L287'>_test-output-stream</a>/imm32
<span id="L636" class="LineNr">636 </span> 68/push <a href='112read-byte.subx.html#L318'>_test-buffered-file</a>/imm32
<span id="L637" class="LineNr">637 </span> <span class="subxS2Comment"># . . call</span>
<span id="L638" class="LineNr">638 </span> e8/call <a href='crenshaw2-1b.subx.html#L187'>get-num</a>/disp32
<span id="L639" class="LineNr">639 </span> <span class="subxComment"># registers except esp may be clobbered at this point</span>
<span id="L640" class="LineNr">640 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L641" class="LineNr">641 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0x10/imm32 <span class="subxComment"># add to esp</span>
<span id="L642" class="LineNr">642 </span> <span class="subxComment"># check-ints-equal(*_test-output-stream->data, '3456', msg)</span>
<span id="L643" class="LineNr">643 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L644" class="LineNr">644 </span> 68/push <span class="Constant">"F - test-get-num-reads-multiple-digits-followed-by-nondigit"</span>/imm32
<span id="L645" class="LineNr">645 </span> 68/push 0x36353433/imm32
<span id="L646" class="LineNr">646 </span> b8/copy-to-eax <a href='115write-byte.subx.html#L287'>_test-output-stream</a>/imm32
<span id="L647" class="LineNr">647 </span> ff 6/subop/push 1/mod/*+disp8 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(eax+12)</span>
<span id="L648" class="LineNr">648 </span> <span class="subxS2Comment"># . . call</span>
<span id="L649" class="LineNr">649 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
<span id="L650" class="LineNr">650 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L651" class="LineNr">651 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L652" class="LineNr">652 </span> <span class="subxS1Comment"># . reclaim locals</span>
<span id="L653" class="LineNr">653 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L654" class="LineNr">654 </span> 5d/pop-to-ebp
<span id="L655" class="LineNr">655 </span> c3/return
<span id="L656" class="LineNr">656 </span>
<span id="L657" class="LineNr">657 </span><span class="subxComment">## helpers</span>
<span id="L658" class="LineNr">658 </span>
<span id="L659" class="LineNr">659 </span><span class="subxComment"># write(f, "Error: "+s+" expected\n") then stop(ed, 1)</span>
<span id="L660" class="LineNr">660 </span><span class="subxFunction">expected</span>: <span class="subxComment"># ed: (addr exit-descriptor), f: fd or (addr stream byte), s: (addr array byte)</span>
<span id="L661" class="LineNr">661 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L662" class="LineNr">662 </span> 55/push-ebp
<span id="L663" class="LineNr">663 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L664" class="LineNr">664 </span> <span class="subxComment"># write(f, "Error: ")</span>
<span id="L665" class="LineNr">665 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L666" class="LineNr">666 </span> 68/push <span class="Constant">"Error: "</span>/imm32
<span id="L667" class="LineNr">667 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+12)</span>
<span id="L668" class="LineNr">668 </span> <span class="subxS2Comment"># . . call</span>
<span id="L669" class="LineNr">669 </span> e8/call <a href='108write.subx.html#L24'>write</a>/disp32
<span id="L670" class="LineNr">670 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L671" class="LineNr">671 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L672" class="LineNr">672 </span> <span class="subxComment"># write(f, s)</span>
<span id="L673" class="LineNr">673 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L674" class="LineNr">674 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+16)</span>
<span id="L675" class="LineNr">675 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+12)</span>
<span id="L676" class="LineNr">676 </span> <span class="subxS2Comment"># . . call</span>
<span id="L677" class="LineNr">677 </span> e8/call <a href='108write.subx.html#L24'>write</a>/disp32
<span id="L678" class="LineNr">678 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L679" class="LineNr">679 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L680" class="LineNr">680 </span> <span class="subxComment"># write(f, " expected\n")</span>
<span id="L681" class="LineNr">681 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L682" class="LineNr">682 </span> 68/push <span class="Constant">" expected\n"</span>/imm32
<span id="L683" class="LineNr">683 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+12)</span>
<span id="L684" class="LineNr">684 </span> <span class="subxS2Comment"># . . call</span>
<span id="L685" class="LineNr">685 </span> e8/call <a href='108write.subx.html#L24'>write</a>/disp32
<span id="L686" class="LineNr">686 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L687" class="LineNr">687 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L688" class="LineNr">688 </span> <span class="subxComment"># stop(ed, 1)</span>
<span id="L689" class="LineNr">689 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L690" class="LineNr">690 </span> 68/push 1/imm32
<span id="L691" class="LineNr">691 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span>
<span id="L692" class="LineNr">692 </span> <span class="subxS2Comment"># . . call</span>
<span id="L693" class="LineNr">693 </span> e8/call <a href='110stop.subx.html#L92'>stop</a>/disp32
<span id="L694" class="LineNr">694 </span> <span class="subxComment"># should never get past this point</span>
<span id="L695" class="LineNr">695 </span><span class="Constant">$expected:dead-end</span>:
<span id="L696" class="LineNr">696 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L697" class="LineNr">697 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L698" class="LineNr">698 </span> 5d/pop-to-ebp
<span id="L699" class="LineNr">699 </span> c3/return
<span id="L700" class="LineNr">700 </span>
<span id="L701" class="LineNr">701 </span><span class="subxComment"># read a byte from 'f', and save it in 'Look'</span>
<span id="L702" class="LineNr">702 </span><span class="subxFunction">get-char</span>: <span class="subxComment"># f: (addr buffered-file)</span>
<span id="L703" class="LineNr">703 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L704" class="LineNr">704 </span> 55/push-ebp
<span id="L705" class="LineNr">705 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L706" class="LineNr">706 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L707" class="LineNr">707 </span> 50/push-eax
<span id="L708" class="LineNr">708 </span> <span class="subxComment"># eax = read-byte-buffered(f)</span>
<span id="L709" class="LineNr">709 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L710" class="LineNr">710 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span>
<span id="L711" class="LineNr">711 </span> <span class="subxS2Comment"># . . call</span>
<span id="L712" class="LineNr">712 </span> e8/call <a href='112read-byte.subx.html#L38'>read-byte-buffered</a>/disp32
<span id="L713" class="LineNr">713 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L714" class="LineNr">714 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L715" class="LineNr">715 </span> <span class="subxComment"># save eax to Look</span>
<span id="L716" class="LineNr">716 </span> 89/copy 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="SpecialChar"><a href='crenshaw2-1b.subx.html#L747'>Look</a></span>/disp32 <span class="Normal"> . </span> <span class="subxComment"># copy eax to *Look</span>
<span id="L717" class="LineNr">717 </span><span class="Constant">$get-char:end</span>:
<span id="L718" class="LineNr">718 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L719" class="LineNr">719 </span> 58/pop-to-eax
<span id="L720" class="LineNr">720 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L721" class="LineNr">721 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L722" class="LineNr">722 </span> 5d/pop-to-ebp
<span id="L723" class="LineNr">723 </span> c3/return
<span id="L724" class="LineNr">724 </span>
<span id="L725" class="LineNr">725 </span><span class="subxFunction">digit?</span>: <span class="subxComment"># c: int -> eax: boolean</span>
<span id="L726" class="LineNr">726 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L727" class="LineNr">727 </span> 55/push-ebp
<span id="L728" class="LineNr">728 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L729" class="LineNr">729 </span> <span class="subxComment"># eax = false</span>
<span id="L730" class="LineNr">730 </span> b8/copy-to-eax 0/imm32
<span id="L731" class="LineNr">731 </span> <span class="subxComment"># if (c < '0') return false</span>
<span id="L732" class="LineNr">732 </span> 81 7/subop/compare 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 0x30/imm32 <span class="subxComment"># compare *(ebp+8)</span>
<span id="L733" class="LineNr">733 </span> 7c/jump-if-< $digit?:end/disp8
<span id="L734" class="LineNr">734 </span> <span class="subxComment"># if (c > '9') return false</span>
<span id="L735" class="LineNr">735 </span> 81 7/subop/compare 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 0x39/imm32 <span class="subxComment"># compare *(ebp+8)</span>
<span id="L736" class="LineNr">736 </span> 7f/jump-if-> $digit?:end/disp8
<span id="L737" class="LineNr">737 </span> <span class="subxComment"># otherwise return true</span>
<span id="L738" class="LineNr">738 </span> b8/copy-to-eax 1/imm32
<span id="L739" class="LineNr">739 </span><span class="Constant">$digit?:end</span>:
<span id="L740" class="LineNr">740 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L741" class="LineNr">741 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L742" class="LineNr">742 </span> 5d/pop-to-ebp
<span id="L743" class="LineNr">743 </span> c3/return
<span id="L744" class="LineNr">744 </span>
<span id="L745" class="LineNr">745 </span>== data
<span id="L746" class="LineNr">746 </span>
<span id="L747" class="LineNr">747 </span><span class="SpecialChar">Look</span>: <span class="subxComment"># (char with some extra padding)</span>
<span id="L748" class="LineNr">748 </span> 0/imm32
<span id="L749" class="LineNr">749 </span>
<span id="L750" class="LineNr">750 </span><span class="subxS2Comment"># . . vim:nowrap:textwidth=0</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->
|