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
|
<!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 - apps/braces.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,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
<meta name="colorscheme" content="minimal-light">
<style type="text/css">
<!--
pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #c6c6c6; }
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.subxComment { color: #005faf; }
.subxTest { color: #5f8700; }
.subxFunction { color: #af5f00; text-decoration: underline; }
.LineNr { }
.subxS1Comment { color: #0000af; }
.SpecialChar { color: #d70000; }
.Constant { color: #008787; }
.Folded { color: #080808; background-color: #949494; }
-->
</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/master/apps/braces.subx'>https://github.com/akkartik/mu/blob/master/apps/braces.subx</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># Structured control flow using break/loop rather than jump.</span>
<span id="L2" class="LineNr"> 2 </span><span class="subxComment">#</span>
<span id="L3" class="LineNr"> 3 </span><span class="subxComment"># To run (on Linux):</span>
<span id="L4" class="LineNr"> 4 </span><span class="subxComment"># $ ./translate_subx init.linux 0*.subx apps/subx-params.subx apps/braces.subx</span>
<span id="L5" class="LineNr"> 5 </span><span class="subxComment"># $ mv a.elf apps/braces</span>
<span id="L6" class="LineNr"> 6 </span><span class="subxComment">#</span>
<span id="L7" class="LineNr"> 7 </span><span class="subxComment"># Example 1:</span>
<span id="L8" class="LineNr"> 8 </span><span class="subxComment"># $ cat x.subx</span>
<span id="L9" class="LineNr"> 9 </span><span class="subxComment"># {</span>
<span id="L10" class="LineNr"> 10 </span><span class="subxComment"># 7c/jump-if-< break/disp8</span>
<span id="L11" class="LineNr"> 11 </span><span class="subxComment"># 74/jump-if-= loop/disp8</span>
<span id="L12" class="LineNr"> 12 </span><span class="subxComment"># }</span>
<span id="L13" class="LineNr"> 13 </span><span class="subxComment"># $ cat x.subx |apps/braces</span>
<span id="L14" class="LineNr"> 14 </span><span class="subxComment"># _loop1:</span>
<span id="L15" class="LineNr"> 15 </span><span class="subxComment"># 7c/jump-if-< _break1/disp8</span>
<span id="L16" class="LineNr"> 16 </span><span class="subxComment"># 74/jump-if-= _loop1/disp8</span>
<span id="L17" class="LineNr"> 17 </span><span class="subxComment"># _break1:</span>
<span id="L18" class="LineNr"> 18 </span><span class="subxComment">#</span>
<span id="L19" class="LineNr"> 19 </span><span class="subxComment"># Example 2:</span>
<span id="L20" class="LineNr"> 20 </span><span class="subxComment"># $ cat x.subx</span>
<span id="L21" class="LineNr"> 21 </span><span class="subxComment"># {</span>
<span id="L22" class="LineNr"> 22 </span><span class="subxComment"># 7c/jump-if-< break/disp8</span>
<span id="L23" class="LineNr"> 23 </span><span class="subxComment"># }</span>
<span id="L24" class="LineNr"> 24 </span><span class="subxComment"># {</span>
<span id="L25" class="LineNr"> 25 </span><span class="subxComment"># 74/jump-if-= loop/disp8</span>
<span id="L26" class="LineNr"> 26 </span><span class="subxComment"># }</span>
<span id="L27" class="LineNr"> 27 </span><span class="subxComment"># $ cat x.subx |apps/braces</span>
<span id="L28" class="LineNr"> 28 </span><span class="subxComment"># _loop1:</span>
<span id="L29" class="LineNr"> 29 </span><span class="subxComment"># 7c/jump-if-< _break1/disp8</span>
<span id="L30" class="LineNr"> 30 </span><span class="subxComment"># _break1:</span>
<span id="L31" class="LineNr"> 31 </span><span class="subxComment"># _loop2:</span>
<span id="L32" class="LineNr"> 32 </span><span class="subxComment"># 74/jump-if-= _loop2/disp8</span>
<span id="L33" class="LineNr"> 33 </span><span class="subxComment"># _break2:</span>
<span id="L34" class="LineNr"> 34 </span><span class="subxComment">#</span>
<span id="L35" class="LineNr"> 35 </span><span class="subxComment"># Example 3:</span>
<span id="L36" class="LineNr"> 36 </span><span class="subxComment"># $ cat x.subx</span>
<span id="L37" class="LineNr"> 37 </span><span class="subxComment"># {</span>
<span id="L38" class="LineNr"> 38 </span><span class="subxComment"># {</span>
<span id="L39" class="LineNr"> 39 </span><span class="subxComment"># 74/jump-if-= loop/disp8</span>
<span id="L40" class="LineNr"> 40 </span><span class="subxComment"># }</span>
<span id="L41" class="LineNr"> 41 </span><span class="subxComment"># 7c/jump-if-< loop/disp8</span>
<span id="L42" class="LineNr"> 42 </span><span class="subxComment"># }</span>
<span id="L43" class="LineNr"> 43 </span><span class="subxComment"># $ cat x.subx |apps/braces</span>
<span id="L44" class="LineNr"> 44 </span><span class="subxComment"># _loop1:</span>
<span id="L45" class="LineNr"> 45 </span><span class="subxComment"># _loop2:</span>
<span id="L46" class="LineNr"> 46 </span><span class="subxComment"># 74/jump-if-= _loop2/disp8</span>
<span id="L47" class="LineNr"> 47 </span><span class="subxComment"># _break2:</span>
<span id="L48" class="LineNr"> 48 </span><span class="subxComment"># 7c/jump-if-< _loop1/disp8</span>
<span id="L49" class="LineNr"> 49 </span><span class="subxComment"># _break1:</span>
<span id="L50" class="LineNr"> 50 </span>
<span id="L51" class="LineNr"> 51 </span>== code
<span id="L52" class="LineNr"> 52 </span>
<span id="L53" class="LineNr"> 53 </span><span class="SpecialChar">Entry</span>: <span class="subxComment"># run tests if necessary, a REPL if not</span>
<span id="L54" class="LineNr"> 54 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L55" class="LineNr"> 55 </span> 89/<- %ebp 4/r32/esp
<span id="L56" class="LineNr"> 56 </span> <span class="subxComment"># initialize heap</span>
<span id="L57" class="LineNr"> 57 </span> (<a href='../053new-segment.subx.html#L40'>new-segment</a> *<span class="SpecialChar"><a href='../069allocate.subx.html#L34'>Heap-size</a></span> <span class="SpecialChar"><a href='../069allocate.subx.html#L27'>Heap</a></span>)
<span id="L58" class="LineNr"> 58 </span> <span class="subxComment"># if (argc <= 1) goto interactive</span>
<span id="L59" class="LineNr"> 59 </span> 81 7/subop/compare *ebp 1/imm32
<span id="L60" class="LineNr"> 60 </span> 7e/jump-if-<= $subx-braces-main:interactive/disp8
<span id="L61" class="LineNr"> 61 </span> <span class="subxComment"># if (argv[1] != "test")) goto interactive</span>
<span id="L62" class="LineNr"> 62 </span> (<a href='../052kernel-string-equal.subx.html#L31'>kernel-string-equal?</a> *(ebp+8) <span class="Constant">"test"</span>) <span class="subxComment"># => eax</span>
<span id="L63" class="LineNr"> 63 </span> 3d/compare-eax-and 0/imm32/false
<span id="L64" class="LineNr"> 64 </span> 74/jump-if-= $subx-braces-main:interactive/disp8
<span id="L65" class="LineNr"> 65 </span> <span class="subxComment">#</span>
<span id="L66" class="LineNr"> 66 </span> (run-tests)
<span id="L67" class="LineNr"> 67 </span> <span class="subxComment"># syscall(exit, *Num-test-failures)</span>
<span id="L68" class="LineNr"> 68 </span> 8b/-> *<span class="SpecialChar"><a href='../051test.subx.html#L89'>Num-test-failures</a></span> 3/r32/ebx
<span id="L69" class="LineNr"> 69 </span> eb/jump $subx-braces-main:end/disp8
<span id="L70" class="LineNr"> 70 </span><span class="Constant">$subx-braces-main:interactive</span>:
<span id="L71" class="LineNr"> 71 </span> (<a href='braces.subx.html#L77'>subx-braces</a> <span class="SpecialChar"><a href='../061read-byte.subx.html#L14'>Stdin</a></span> <span class="SpecialChar"><a href='../064write-byte.subx.html#L10'>Stdout</a></span>)
<span id="L72" class="LineNr"> 72 </span> <span class="subxComment"># syscall(exit, 0)</span>
<span id="L73" class="LineNr"> 73 </span> bb/copy-to-ebx 0/imm32
<span id="L74" class="LineNr"> 74 </span><span class="Constant">$subx-braces-main:end</span>:
<span id="L75" class="LineNr"> 75 </span> e8/call syscall_exit/disp32
<span id="L76" class="LineNr"> 76 </span>
<span id="L77" class="LineNr"> 77 </span><span class="subxFunction">subx-braces</span>: <span class="subxComment"># in: (addr buffered-file), out: (addr buffered-file)</span>
<span id="L78" class="LineNr"> 78 </span> <span class="subxComment"># pseudocode:</span>
<span id="L79" class="LineNr"> 79 </span> <span class="subxComment"># var line: (stream byte 512)</span>
<span id="L80" class="LineNr"> 80 </span> <span class="subxComment"># var label-stack: (stack int 32) # at most 32 levels of nesting</span>
<span id="L81" class="LineNr"> 81 </span> <span class="subxComment"># var next-label-id: int = 1</span>
<span id="L82" class="LineNr"> 82 </span> <span class="subxComment"># while true</span>
<span id="L83" class="LineNr"> 83 </span> <span class="subxComment"># clear-stream(line)</span>
<span id="L84" class="LineNr"> 84 </span> <span class="subxComment"># read-line-buffered(in, line)</span>
<span id="L85" class="LineNr"> 85 </span> <span class="subxComment"># if (line->write == 0) break # end of file</span>
<span id="L86" class="LineNr"> 86 </span> <span class="subxComment"># skip-chars-matching-whitespace(line)</span>
<span id="L87" class="LineNr"> 87 </span> <span class="subxComment"># if line->data[line->read] == '{'</span>
<span id="L88" class="LineNr"> 88 </span> <span class="subxComment"># print(out, "_loop" next-label-id ":\n")</span>
<span id="L89" class="LineNr"> 89 </span> <span class="subxComment"># push(label-stack, next-label-id)</span>
<span id="L90" class="LineNr"> 90 </span> <span class="subxComment"># ++next-label-id</span>
<span id="L91" class="LineNr"> 91 </span> <span class="subxComment"># continue</span>
<span id="L92" class="LineNr"> 92 </span> <span class="subxComment"># if line->data[line->read] == '}'</span>
<span id="L93" class="LineNr"> 93 </span> <span class="subxComment"># var top = pop(label-stack)</span>
<span id="L94" class="LineNr"> 94 </span> <span class="subxComment"># print(out, "_break" top ":\n")</span>
<span id="L95" class="LineNr"> 95 </span> <span class="subxComment"># continue</span>
<span id="L96" class="LineNr"> 96 </span> <span class="subxComment"># while true</span>
<span id="L97" class="LineNr"> 97 </span> <span class="subxComment"># var word-slice: (addr slice) = next-word-or-string(line)</span>
<span id="L98" class="LineNr"> 98 </span> <span class="subxComment"># if slice-empty?(word-slice) # end of line</span>
<span id="L99" class="LineNr"> 99 </span> <span class="subxComment"># break</span>
<span id="L100" class="LineNr">100 </span> <span class="subxComment"># if slice-starts-with?(word-slice, "#") # comment</span>
<span id="L101" class="LineNr">101 </span> <span class="subxComment"># continue</span>
<span id="L102" class="LineNr">102 </span> <span class="subxComment"># if slice-starts-with?(word-slice, "break/")</span>
<span id="L103" class="LineNr">103 </span> <span class="subxComment"># var top = top(label-stack)</span>
<span id="L104" class="LineNr">104 </span> <span class="subxComment"># print(out, "_break" top)</span>
<span id="L105" class="LineNr">105 </span> <span class="subxComment"># word-slice->start += len("break")</span>
<span id="L106" class="LineNr">106 </span> <span class="subxComment"># else if slice-starts-with?(word-slice, "loop/")</span>
<span id="L107" class="LineNr">107 </span> <span class="subxComment"># var top = top(label-stack)</span>
<span id="L108" class="LineNr">108 </span> <span class="subxComment"># print(out, "_loop" top)</span>
<span id="L109" class="LineNr">109 </span> <span class="subxComment"># word-slice->start += len("loop")</span>
<span id="L110" class="LineNr">110 </span> <span class="subxComment"># print(out, word-slice " ")</span>
<span id="L111" class="LineNr">111 </span> <span class="subxComment"># print(out, "\n")</span>
<span id="L112" class="LineNr">112 </span> <span class="subxComment"># flush(out)</span>
<span id="L113" class="LineNr">113 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L114" class="LineNr">114 </span> 55/push-ebp
<span id="L115" class="LineNr">115 </span> 89/<- %ebp 4/r32/esp
<span id="L116" class="LineNr">116 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L117" class="LineNr">117 </span> 50/push-eax
<span id="L118" class="LineNr">118 </span> 51/push-ecx
<span id="L119" class="LineNr">119 </span> 52/push-edx
<span id="L120" class="LineNr">120 </span> 53/push-ebx
<span id="L121" class="LineNr">121 </span> 56/push-esi
<span id="L122" class="LineNr">122 </span> 57/push-edi
<span id="L123" class="LineNr">123 </span> <span class="subxComment"># esi = in</span>
<span id="L124" class="LineNr">124 </span> 8b/-> *(ebp+8) 6/r32/esi
<span id="L125" class="LineNr">125 </span> <span class="subxComment"># var line/ecx: (stream byte 512)</span>
<span id="L126" class="LineNr">126 </span> 81 5/subop/subtract %esp 0x200/imm32
<span id="L127" class="LineNr">127 </span> 68/push 0x200/imm32/length
<span id="L128" class="LineNr">128 </span> 68/push 0/imm32/read
<span id="L129" class="LineNr">129 </span> 68/push 0/imm32/write
<span id="L130" class="LineNr">130 </span> 89/<- %ecx 4/r32/esp
<span id="L131" class="LineNr">131 </span> <span class="subxComment"># var label-stack/edx: (stack int 32)</span>
<span id="L132" class="LineNr">132 </span> 81 5/subop/subtract %esp 0x80/imm32
<span id="L133" class="LineNr">133 </span> 68/push 0x80/imm32/length
<span id="L134" class="LineNr">134 </span> 68/push 0/imm32/top
<span id="L135" class="LineNr">135 </span> 89/<- %edx 4/r32/esp
<span id="L136" class="LineNr">136 </span> <span class="subxComment"># var next-label-id/ebx: int = 1</span>
<span id="L137" class="LineNr">137 </span> c7 0/subop/copy %ebx 1/imm32
<span id="L138" class="LineNr">138 </span> <span class="subxComment"># var word-slice/edi: slice</span>
<span id="L139" class="LineNr">139 </span> 68/push 0/imm32/end
<span id="L140" class="LineNr">140 </span> 68/push 0/imm32/start
<span id="L141" class="LineNr">141 </span> 89/<- %edi 4/r32/esp
<span id="L142" class="LineNr">142 </span><span class="Constant">$subx-braces:line-loop</span>:
<span id="L143" class="LineNr">143 </span> (<a href='../055stream.subx.html#L17'>clear-stream</a> %ecx)
<span id="L144" class="LineNr">144 </span> (<a href='../071read-line.subx.html#L9'>read-line-buffered</a> %esi %ecx)
<span id="L145" class="LineNr">145 </span><span class="Constant">$subx-braces:check0</span>:
<span id="L146" class="LineNr">146 </span> <span class="subxComment"># if (line->write == 0) break</span>
<span id="L147" class="LineNr">147 </span> 81 7/subop/compare *ecx 0/imm32
<span id="L148" class="LineNr">148 </span> 0f 84/jump-if-= $subx-braces:<span class="Constant">break</span>/disp32
<span id="L149" class="LineNr">149 </span> (<a href='../073next-token.subx.html#L464'>skip-chars-matching-whitespace</a> %ecx)
<span id="L150" class="LineNr">150 </span><span class="Constant">$subx-braces:check-for-curly-open</span>:
<span id="L151" class="LineNr">151 </span> <span class="subxComment"># if (line->data[line->read] != '{') goto next check</span>
<span id="L152" class="LineNr">152 </span> <span class="subxS1Comment"># . eax = line->data[line->read]</span>
<span id="L153" class="LineNr">153 </span> 8b/-> *(ecx+4) 0/r32/eax
<span id="L154" class="LineNr">154 </span> 8a/copy-byte *(ecx+eax+0xc) 0/r32/AL
<span id="L155" class="LineNr">155 </span> 81 4/subop/and %eax 0xff/imm32
<span id="L156" class="LineNr">156 </span> <span class="subxS1Comment"># . if (eax != '{') continue</span>
<span id="L157" class="LineNr">157 </span> 3d/compare-eax-and 0x7b/imm32/open-curly
<span id="L158" class="LineNr">158 </span> 0f 85/jump-if-!= $subx-braces:check-for-curly-closed/disp32
<span id="L159" class="LineNr">159 </span><span class="Constant">$subx-braces:emit-curly-open</span>:
<span id="L160" class="LineNr">160 </span> <span class="subxComment"># print(out, "_loop" next-label-id ":")</span>
<span id="L161" class="LineNr">161 </span> (<a href='../065write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) <span class="Constant">"_loop"</span>)
<span id="L162" class="LineNr">162 </span> (<a href='../066write-int-hex.subx.html#L266'>write-int32-hex-buffered</a> *(ebp+0xc) %ebx)
<span id="L163" class="LineNr">163 </span> (<a href='../065write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) <span class="Constant">":"</span>)
<span id="L164" class="LineNr">164 </span> <span class="subxComment"># push(label-stack, next-label-id)</span>
<span id="L165" class="LineNr">165 </span> (<a href='../092stack.subx.html#L114'>push</a> %edx %ebx)
<span id="L166" class="LineNr">166 </span> <span class="subxComment"># ++next-label-id</span>
<span id="L167" class="LineNr">167 </span> ff 0/subop/increment %ebx
<span id="L168" class="LineNr">168 </span> <span class="subxComment"># continue</span>
<span id="L169" class="LineNr">169 </span> e9/jump $subx-braces:next-line/disp32
<span id="L170" class="LineNr">170 </span><span class="Constant">$subx-braces:check-for-curly-closed</span>:
<span id="L171" class="LineNr">171 </span> <span class="subxComment"># if (line->data[line->read] != '}') goto next check</span>
<span id="L172" class="LineNr">172 </span> 3d/compare-eax-and 0x7d/imm32/close-curly
<span id="L173" class="LineNr">173 </span> 0f 85/jump-if-= $subx-braces:word-loop/disp32
<span id="L174" class="LineNr">174 </span><span class="Constant">$subx-braces:emit-curly-closed</span>:
<span id="L175" class="LineNr">175 </span> <span class="subxComment"># eax = pop(label-stack)</span>
<span id="L176" class="LineNr">176 </span> (<a href='../092stack.subx.html#L234'>pop</a> %edx)
<span id="L177" class="LineNr">177 </span> <span class="subxComment"># print(out, "_break" eax ":")</span>
<span id="L178" class="LineNr">178 </span> (<a href='../065write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) <span class="Constant">"_break"</span>)
<span id="L179" class="LineNr">179 </span> (<a href='../066write-int-hex.subx.html#L266'>write-int32-hex-buffered</a> *(ebp+0xc) %eax)
<span id="L180" class="LineNr">180 </span> (<a href='../065write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) <span class="Constant">":"</span>)
<span id="L181" class="LineNr">181 </span> <span class="subxComment"># continue</span>
<span id="L182" class="LineNr">182 </span> e9/jump $subx-braces:next-line/disp32
<span id="L183" class="LineNr">183 </span><span class="Constant">$subx-braces:word-loop</span>:
<span id="L184" class="LineNr">184 </span> (<a href='../085next-word-or-string.subx.html#L8'>next-word-or-string</a> %ecx %edi)
<span id="L185" class="LineNr">185 </span><span class="Constant">$subx-braces:check1</span>:
<span id="L186" class="LineNr">186 </span> <span class="subxComment"># if (slice-empty?(word-slice)) break</span>
<span id="L187" class="LineNr">187 </span> (<a href='../072slice.subx.html#L9'>slice-empty?</a> %edi)
<span id="L188" class="LineNr">188 </span> 3d/compare-eax-and 0/imm32/false
<span id="L189" class="LineNr">189 </span> 0f 85/jump-if-!= $subx-braces:next-line/disp32
<span id="L190" class="LineNr">190 </span><span class="Constant">$subx-braces:check-for-comment</span>:
<span id="L191" class="LineNr">191 </span> <span class="subxComment"># if (slice-starts-with?(word-slice, "#")) continue</span>
<span id="L192" class="LineNr">192 </span> <span class="subxS1Comment"># . eax = *word-slice->start</span>
<span id="L193" class="LineNr">193 </span> 8b/-> *edi 0/r32/eax
<span id="L194" class="LineNr">194 </span> 8a/copy-byte *eax 0/r32/AL
<span id="L195" class="LineNr">195 </span> 81 4/subop/and %eax 0xff/imm32
<span id="L196" class="LineNr">196 </span> <span class="subxS1Comment"># . if (eax == '#') continue</span>
<span id="L197" class="LineNr">197 </span> 3d/compare-eax-and 0x23/imm32/hash
<span id="L198" class="LineNr">198 </span> 74/jump-if-= $subx-braces:word-loop/disp8
<span id="L199" class="LineNr">199 </span><span class="Constant">$subx-braces:check-for-break</span>:
<span id="L200" class="LineNr">200 </span> <span class="subxComment"># if (!slice-starts-with?(word-slice, "break/")) goto next check</span>
<span id="L201" class="LineNr">201 </span> <span class="subxS1Comment"># . eax = slice-starts-with?(word-slice, "break/")</span>
<span id="L202" class="LineNr">202 </span> (<a href='../072slice.subx.html#L487'>slice-starts-with?</a> %edi <span class="Constant">"break/"</span>)
<span id="L203" class="LineNr">203 </span> <span class="subxS1Comment"># . if (eax == false) goto next check</span>
<span id="L204" class="LineNr">204 </span> 3d/compare-eax-and 0/imm32/false
<span id="L205" class="LineNr">205 </span> 74/jump-if-= $subx-braces:check-for-loop/disp8
<span id="L206" class="LineNr">206 </span><span class="Constant">$subx-braces:emit-break</span>:
<span id="L207" class="LineNr">207 </span> (<a href='../092stack.subx.html#L338'>top</a> %edx)
<span id="L208" class="LineNr">208 </span> <span class="subxComment"># print(out, "_break" eax)</span>
<span id="L209" class="LineNr">209 </span> (<a href='../065write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) <span class="Constant">"_break"</span>)
<span id="L210" class="LineNr">210 </span> (<a href='../066write-int-hex.subx.html#L266'>write-int32-hex-buffered</a> *(ebp+0xc) %eax)
<span id="L211" class="LineNr">211 </span> <span class="subxComment"># word-slice->start += len("break")</span>
<span id="L212" class="LineNr">212 </span> 81 0/subop/add *edi 5/imm32/strlen
<span id="L213" class="LineNr">213 </span> <span class="subxComment"># emit rest of word as usual</span>
<span id="L214" class="LineNr">214 </span> eb/jump $subx-braces:emit-word-slice/disp8
<span id="L215" class="LineNr">215 </span><span class="Constant">$subx-braces:check-for-loop</span>:
<span id="L216" class="LineNr">216 </span> <span class="subxComment"># if (!slice-starts-with?(word-slice, "loop/")) emit word</span>
<span id="L217" class="LineNr">217 </span> <span class="subxS1Comment"># . eax = slice-starts-with?(word-slice, "loop/")</span>
<span id="L218" class="LineNr">218 </span> (<a href='../072slice.subx.html#L487'>slice-starts-with?</a> %edi <span class="Constant">"loop/"</span>)
<span id="L219" class="LineNr">219 </span> <span class="subxS1Comment"># . if (eax == false) goto next check</span>
<span id="L220" class="LineNr">220 </span> 3d/compare-eax-and 0/imm32/false
<span id="L221" class="LineNr">221 </span> 74/jump-if-= $subx-braces:emit-word-slice/disp8
<span id="L222" class="LineNr">222 </span><span class="Constant">$subx-braces:emit-loop</span>:
<span id="L223" class="LineNr">223 </span> (<a href='../092stack.subx.html#L338'>top</a> %edx)
<span id="L224" class="LineNr">224 </span> <span class="subxComment"># print(out, "_loop" eax)</span>
<span id="L225" class="LineNr">225 </span> (<a href='../065write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) <span class="Constant">"_loop"</span>)
<span id="L226" class="LineNr">226 </span> (<a href='../066write-int-hex.subx.html#L266'>write-int32-hex-buffered</a> *(ebp+0xc) %eax)
<span id="L227" class="LineNr">227 </span> <span class="subxComment"># word-slice->start += len("loop")</span>
<span id="L228" class="LineNr">228 </span> 81 0/subop/add *edi 4/imm32/strlen
<span id="L229" class="LineNr">229 </span> <span class="subxComment"># fall through</span>
<span id="L230" class="LineNr">230 </span><span class="Constant">$subx-braces:emit-word-slice</span>:
<span id="L231" class="LineNr">231 </span> <span class="subxComment"># print(out, word-slice " ")</span>
<span id="L232" class="LineNr">232 </span> (<a href='../072slice.subx.html#L908'>write-slice-buffered</a> *(ebp+0xc) %edi)
<span id="L233" class="LineNr">233 </span> (<a href='../065write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) <span class="SpecialChar"><a href='../051test.subx.html#L93'>Space</a></span>)
<span id="L234" class="LineNr">234 </span> <span class="subxComment"># loop to next word</span>
<span id="L235" class="LineNr">235 </span> e9/jump $subx-braces:word-loop/disp32
<span id="L236" class="LineNr">236 </span><span class="Constant">$subx-braces:next-line</span>:
<span id="L237" class="LineNr">237 </span> <span class="subxComment"># print(out, "\n")</span>
<span id="L238" class="LineNr">238 </span> (<a href='../065write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) <span class="SpecialChar"><a href='../051test.subx.html#L82'>Newline</a></span>)
<span id="L239" class="LineNr">239 </span> <span class="subxComment"># loop to next line</span>
<span id="L240" class="LineNr">240 </span> e9/jump $subx-braces:line-loop/disp32
<span id="L241" class="LineNr">241 </span><span class="Constant">$subx-braces:break</span>:
<span id="L242" class="LineNr">242 </span> (<a href='../064write-byte.subx.html#L81'>flush</a> *(ebp+0xc))
<span id="L243" class="LineNr">243 </span><span class="Constant">$subx-braces:end</span>:
<span id="L244" class="LineNr">244 </span> <span class="subxS1Comment"># . reclaim locals</span>
<span id="L245" class="LineNr">245 </span> 81 0/subop/add %esp 0x29c/imm32
<span id="L246" class="LineNr">246 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L247" class="LineNr">247 </span> 5f/pop-to-edi
<span id="L248" class="LineNr">248 </span> 5e/pop-to-esi
<span id="L249" class="LineNr">249 </span> 5b/pop-to-ebx
<span id="L250" class="LineNr">250 </span> 5a/pop-to-edx
<span id="L251" class="LineNr">251 </span> 59/pop-to-ecx
<span id="L252" class="LineNr">252 </span> 58/pop-to-eax
<span id="L253" class="LineNr">253 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L254" class="LineNr">254 </span> 89/<- %esp 5/r32/ebp
<span id="L255" class="LineNr">255 </span> 5d/pop-to-ebp
<span id="L256" class="LineNr">256 </span> c3/return
<span id="L257" class="LineNr">257 </span>
<span id="L258" class="LineNr">258 </span><span class="subxTest">test-subx-braces-passes-most-words-through</span>:
<span id="L259" class="LineNr">259 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L260" class="LineNr">260 </span> 55/push-ebp
<span id="L261" class="LineNr">261 </span> 89/<- %ebp 4/r32/esp
<span id="L262" class="LineNr">262 </span> <span class="subxComment"># setup</span>
<span id="L263" class="LineNr">263 </span> (<a href='../055stream.subx.html#L17'>clear-stream</a> <a href='../061read-byte.subx.html#L287'>_test-input-stream</a>)
<span id="L264" class="LineNr">264 </span> (<a href='../055stream.subx.html#L17'>clear-stream</a> <a href='../064write-byte.subx.html#L285'>_test-output-stream</a>)
<span id="L265" class="LineNr">265 </span> (<a href='../055stream.subx.html#L17'>clear-stream</a> $_test-input-buffered-file->buffer)
<span id="L266" class="LineNr">266 </span> (<a href='../055stream.subx.html#L17'>clear-stream</a> $_test-output-buffered-file->buffer)
<span id="L267" class="LineNr">267 </span> <span class="subxComment"># test</span>
<span id="L268" class="LineNr">268 </span> (<a href='../057write.subx.html#L24'>write</a> <a href='../061read-byte.subx.html#L287'>_test-input-stream</a> <span class="Constant">"== abcd 0x1"</span>)
<span id="L269" class="LineNr">269 </span> (<a href='braces.subx.html#L77'>subx-braces</a> <a href='../061read-byte.subx.html#L313'>_test-input-buffered-file</a> <a href='../064write-byte.subx.html#L359'>_test-output-buffered-file</a>)
<span id="L270" class="LineNr">270 </span> <span class="subxComment"># check that the line just passed through</span>
<span id="L271" class="LineNr">271 </span> (<a href='../064write-byte.subx.html#L81'>flush</a> <a href='../064write-byte.subx.html#L359'>_test-output-buffered-file</a>)
<span id="L272" class="Folded">272 </span><span class="Folded">+-- 5 lines: #? # dump _test-output-stream -----------------------------------------------------------------------------------------------------------------------------------------</span>
<span id="L277" class="LineNr">277 </span> (<a href='../058stream-equal.subx.html#L194'>check-stream-equal</a> <a href='../064write-byte.subx.html#L285'>_test-output-stream</a> <span class="Constant">"== abcd 0x1 \n"</span> <span class="Constant">"F - test-subx-braces-passes-most-words-through"</span>)
<span id="L278" class="LineNr">278 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L279" class="LineNr">279 </span> 89/<- %esp 5/r32/ebp
<span id="L280" class="LineNr">280 </span> 5d/pop-to-ebp
<span id="L281" class="LineNr">281 </span> c3/return
<span id="L282" class="LineNr">282 </span>
<span id="L283" class="LineNr">283 </span><span class="subxTest">test-subx-braces-1</span>:
<span id="L284" class="LineNr">284 </span> <span class="subxComment"># input:</span>
<span id="L285" class="LineNr">285 </span> <span class="subxComment"># {</span>
<span id="L286" class="LineNr">286 </span> <span class="subxComment"># ab break/imm32</span>
<span id="L287" class="LineNr">287 </span> <span class="subxComment"># cd loop/imm32</span>
<span id="L288" class="LineNr">288 </span> <span class="subxComment"># }</span>
<span id="L289" class="LineNr">289 </span> <span class="subxComment">#</span>
<span id="L290" class="LineNr">290 </span> <span class="subxComment"># output:</span>
<span id="L291" class="LineNr">291 </span> <span class="subxComment"># _loop1:</span>
<span id="L292" class="LineNr">292 </span> <span class="subxComment"># ab _break1/imm32</span>
<span id="L293" class="LineNr">293 </span> <span class="subxComment"># cd _loop1/imm32</span>
<span id="L294" class="LineNr">294 </span> <span class="subxComment"># _break1:</span>
<span id="L295" class="LineNr">295 </span> <span class="subxComment">#</span>
<span id="L296" class="LineNr">296 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L297" class="LineNr">297 </span> 55/push-ebp
<span id="L298" class="LineNr">298 </span> 89/<- %ebp 4/r32/esp
<span id="L299" class="LineNr">299 </span> <span class="subxComment"># setup</span>
<span id="L300" class="LineNr">300 </span> (<a href='../055stream.subx.html#L17'>clear-stream</a> <a href='../061read-byte.subx.html#L287'>_test-input-stream</a>)
<span id="L301" class="LineNr">301 </span> (<a href='../055stream.subx.html#L17'>clear-stream</a> <a href='../064write-byte.subx.html#L285'>_test-output-stream</a>)
<span id="L302" class="LineNr">302 </span> (<a href='../055stream.subx.html#L17'>clear-stream</a> $_test-input-buffered-file->buffer)
<span id="L303" class="LineNr">303 </span> (<a href='../055stream.subx.html#L17'>clear-stream</a> $_test-output-buffered-file->buffer)
<span id="L304" class="LineNr">304 </span> <span class="subxComment"># test</span>
<span id="L305" class="LineNr">305 </span> (<a href='../057write.subx.html#L24'>write</a> <a href='../061read-byte.subx.html#L287'>_test-input-stream</a> <span class="Constant">"{\nab break/imm32\ncd loop/imm32\n}"</span>)
<span id="L306" class="LineNr">306 </span> (<a href='braces.subx.html#L77'>subx-braces</a> <a href='../061read-byte.subx.html#L313'>_test-input-buffered-file</a> <a href='../064write-byte.subx.html#L359'>_test-output-buffered-file</a>)
<span id="L307" class="LineNr">307 </span> <span class="subxComment"># check that the line just passed through</span>
<span id="L308" class="LineNr">308 </span> (<a href='../064write-byte.subx.html#L81'>flush</a> <a href='../064write-byte.subx.html#L359'>_test-output-buffered-file</a>)
<span id="L309" class="Folded">309 </span><span class="Folded">+-- 5 lines: #? # dump _test-output-stream -----------------------------------------------------------------------------------------------------------------------------------------</span>
<span id="L314" class="LineNr">314 </span> (<a href='../058stream-equal.subx.html#L194'>check-stream-equal</a> <a href='../064write-byte.subx.html#L285'>_test-output-stream</a> <span class="Constant">"_loop0x00000001:\nab _break0x00000001/imm32 \ncd _loop0x00000001/imm32 \n_break0x00000001:\n"</span> <span class="Constant">"F - test-subx-braces-1"</span>)
<span id="L315" class="LineNr">315 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L316" class="LineNr">316 </span> 89/<- %esp 5/r32/ebp
<span id="L317" class="LineNr">317 </span> 5d/pop-to-ebp
<span id="L318" class="LineNr">318 </span> c3/return
<span id="L319" class="LineNr">319 </span>
<span id="L320" class="LineNr">320 </span><span class="subxTest">test-subx-braces-2</span>:
<span id="L321" class="LineNr">321 </span> <span class="subxComment"># input:</span>
<span id="L322" class="LineNr">322 </span> <span class="subxComment"># {</span>
<span id="L323" class="LineNr">323 </span> <span class="subxComment"># {</span>
<span id="L324" class="LineNr">324 </span> <span class="subxComment"># ab break/imm32</span>
<span id="L325" class="LineNr">325 </span> <span class="subxComment"># }</span>
<span id="L326" class="LineNr">326 </span> <span class="subxComment"># cd loop/imm32</span>
<span id="L327" class="LineNr">327 </span> <span class="subxComment"># }</span>
<span id="L328" class="LineNr">328 </span> <span class="subxComment">#</span>
<span id="L329" class="LineNr">329 </span> <span class="subxComment"># output:</span>
<span id="L330" class="LineNr">330 </span> <span class="subxComment"># _loop1:</span>
<span id="L331" class="LineNr">331 </span> <span class="subxComment"># _loop2:</span>
<span id="L332" class="LineNr">332 </span> <span class="subxComment"># ab _break2/imm32</span>
<span id="L333" class="LineNr">333 </span> <span class="subxComment"># _break2:</span>
<span id="L334" class="LineNr">334 </span> <span class="subxComment"># cd _loop1/imm32</span>
<span id="L335" class="LineNr">335 </span> <span class="subxComment"># _break1:</span>
<span id="L336" class="LineNr">336 </span> <span class="subxComment">#</span>
<span id="L337" class="LineNr">337 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L338" class="LineNr">338 </span> 55/push-ebp
<span id="L339" class="LineNr">339 </span> 89/<- %ebp 4/r32/esp
<span id="L340" class="LineNr">340 </span> <span class="subxComment"># setup</span>
<span id="L341" class="LineNr">341 </span> (<a href='../055stream.subx.html#L17'>clear-stream</a> <a href='../061read-byte.subx.html#L287'>_test-input-stream</a>)
<span id="L342" class="LineNr">342 </span> (<a href='../055stream.subx.html#L17'>clear-stream</a> <a href='../064write-byte.subx.html#L285'>_test-output-stream</a>)
<span id="L343" class="LineNr">343 </span> (<a href='../055stream.subx.html#L17'>clear-stream</a> $_test-input-buffered-file->buffer)
<span id="L344" class="LineNr">344 </span> (<a href='../055stream.subx.html#L17'>clear-stream</a> $_test-output-buffered-file->buffer)
<span id="L345" class="LineNr">345 </span> <span class="subxComment"># test</span>
<span id="L346" class="LineNr">346 </span> (<a href='../057write.subx.html#L24'>write</a> <a href='../061read-byte.subx.html#L287'>_test-input-stream</a> <span class="Constant">"{\n{\nab break/imm32\n}\ncd loop/imm32\n}"</span>)
<span id="L347" class="LineNr">347 </span> (<a href='braces.subx.html#L77'>subx-braces</a> <a href='../061read-byte.subx.html#L313'>_test-input-buffered-file</a> <a href='../064write-byte.subx.html#L359'>_test-output-buffered-file</a>)
<span id="L348" class="LineNr">348 </span> <span class="subxComment"># check that the line just passed through</span>
<span id="L349" class="LineNr">349 </span> (<a href='../064write-byte.subx.html#L81'>flush</a> <a href='../064write-byte.subx.html#L359'>_test-output-buffered-file</a>)
<span id="L350" class="Folded">350 </span><span class="Folded">+-- 5 lines: #? # dump _test-output-stream -----------------------------------------------------------------------------------------------------------------------------------------</span>
<span id="L355" class="LineNr">355 </span> (<a href='../058stream-equal.subx.html#L194'>check-stream-equal</a> <a href='../064write-byte.subx.html#L285'>_test-output-stream</a> <span class="Constant">"_loop0x00000001:\n_loop0x00000002:\nab _break0x00000002/imm32 \n_break0x00000002:\ncd _loop0x00000001/imm32 \n_break0x00000001:\n"</span> <span class="Constant">"F - test-subx-braces-2"</span>)
<span id="L356" class="LineNr">356 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L357" class="LineNr">357 </span> 89/<- %esp 5/r32/ebp
<span id="L358" class="LineNr">358 </span> 5d/pop-to-ebp
<span id="L359" class="LineNr">359 </span> c3/return
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->
|