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
|
<!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/105string-equal.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; }
.subxFunction { color: #af5f00; text-decoration: underline; }
.LineNr { }
.subxTest { color: #5f8700; }
.subxS1Comment { color: #0000af; }
.CommentedCode { color: #8a8a8a; }
.SpecialChar { color: #d70000; }
.Normal { color: #000000; background-color: #ffffd7; padding-bottom: 1px; }
.Constant { color: #008787; }
.subxS2Comment { color: #8a8a8a; }
.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/105string-equal.subx'>https://github.com/akkartik/mu/blob/main/linux/105string-equal.subx</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># Comparing 'regular' size-prefixed strings.</span>
<span id="L2" class="LineNr"> 2 </span>
<span id="L3" class="LineNr"> 3 </span>== code
<span id="L4" class="LineNr"> 4 </span><span class="subxComment"># instruction effective address register displacement immediate</span>
<span id="L5" class="LineNr"> 5 </span><span class="subxS1Comment"># . op subop mod rm32 base index scale r32</span>
<span id="L6" class="LineNr"> 6 </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="L7" class="LineNr"> 7 </span>
<span id="L8" class="LineNr"> 8 </span><span class="SpecialChar">Entry</span>: <span class="subxComment"># run all tests</span>
<span id="L9" class="LineNr"> 9 </span><span class="CommentedCode">#? e8/call test-compare-equal-strings/disp32</span>
<span id="L10" class="LineNr"> 10 </span> e8/call run-tests/disp32 <span class="subxComment"># 'run-tests' is a function created automatically by SubX. It calls all functions that start with 'test-'.</span>
<span id="L11" class="LineNr"> 11 </span> <span class="subxComment"># syscall(exit, Num-test-failures)</span>
<span id="L12" class="LineNr"> 12 </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="L13" class="LineNr"> 13 </span> e8/call <a href='000init.subx.html#L18'>syscall_exit</a>/disp32
<span id="L14" class="LineNr"> 14 </span>
<span id="L15" class="LineNr"> 15 </span><span class="subxFunction">string-equal?</span>: <span class="subxComment"># s: (addr array byte), benchmark: (addr array byte) -> result/eax: boolean</span>
<span id="L16" class="LineNr"> 16 </span> <span class="subxComment"># pseudocode:</span>
<span id="L17" class="LineNr"> 17 </span> <span class="subxComment"># if (s->size != benchmark->size) return false</span>
<span id="L18" class="LineNr"> 18 </span> <span class="subxComment"># return string-starts-with?(s, benchmark)</span>
<span id="L19" class="LineNr"> 19 </span> <span class="subxComment">#</span>
<span id="L20" class="LineNr"> 20 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L21" class="LineNr"> 21 </span> 55/push-ebp
<span id="L22" class="LineNr"> 22 </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="L23" class="LineNr"> 23 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L24" class="LineNr"> 24 </span> 51/push-ecx
<span id="L25" class="LineNr"> 25 </span> 56/push-esi
<span id="L26" class="LineNr"> 26 </span> 57/push-edi
<span id="L27" class="LineNr"> 27 </span> <span class="subxComment"># esi = s</span>
<span id="L28" class="LineNr"> 28 </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="L29" class="LineNr"> 29 </span> <span class="subxComment"># edi = benchmark</span>
<span id="L30" class="LineNr"> 30 </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="L31" class="LineNr"> 31 </span> <span class="subxComment"># ecx = s->size</span>
<span id="L32" class="LineNr"> 32 </span> 8b/copy 0/mod/indirect 6/rm32/esi <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 *esi to ecx</span>
<span id="L33" class="LineNr"> 33 </span><span class="Constant">$string-equal?:sizes</span>:
<span id="L34" class="LineNr"> 34 </span> <span class="subxComment"># if (ecx != benchmark->size) return false</span>
<span id="L35" class="LineNr"> 35 </span> 39/compare 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"># compare *edi and ecx</span>
<span id="L36" class="LineNr"> 36 </span> b8/copy-to-eax 0/imm32/false
<span id="L37" class="LineNr"> 37 </span> 75/jump-if-!= $string-equal?:end/disp8
<span id="L38" class="LineNr"> 38 </span><span class="Constant">$string-equal?:contents</span>:
<span id="L39" class="LineNr"> 39 </span> <span class="subxComment"># string-starts-with?(s, benchmark)</span>
<span id="L40" class="LineNr"> 40 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L41" class="LineNr"> 41 </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="L42" class="LineNr"> 42 </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="L43" class="LineNr"> 43 </span> <span class="subxS2Comment"># . . call</span>
<span id="L44" class="LineNr"> 44 </span> e8/call <a href='105string-equal.subx.html#L57'>string-starts-with?</a>/disp32
<span id="L45" class="LineNr"> 45 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L46" class="LineNr"> 46 </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="L47" class="LineNr"> 47 </span><span class="Constant">$string-equal?:end</span>:
<span id="L48" class="LineNr"> 48 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L49" class="LineNr"> 49 </span> 5f/pop-to-edi
<span id="L50" class="LineNr"> 50 </span> 5e/pop-to-esi
<span id="L51" class="LineNr"> 51 </span> 59/pop-to-ecx
<span id="L52" class="LineNr"> 52 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L53" class="LineNr"> 53 </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="L54" class="LineNr"> 54 </span> 5d/pop-to-ebp
<span id="L55" class="LineNr"> 55 </span> c3/return
<span id="L56" class="LineNr"> 56 </span>
<span id="L57" class="LineNr"> 57 </span><span class="subxFunction">string-starts-with?</span>: <span class="subxComment"># s: (addr array byte), benchmark: (addr array byte) -> result/eax: boolean</span>
<span id="L58" class="LineNr"> 58 </span> <span class="subxComment"># pseudocode:</span>
<span id="L59" class="LineNr"> 59 </span> <span class="subxComment"># if (s->size < benchmark->size) return false</span>
<span id="L60" class="LineNr"> 60 </span> <span class="subxComment"># currs = s->data</span>
<span id="L61" class="LineNr"> 61 </span> <span class="subxComment"># currb = benchmark->data</span>
<span id="L62" class="LineNr"> 62 </span> <span class="subxComment"># maxb = &benchmark->data[benchmark->size]</span>
<span id="L63" class="LineNr"> 63 </span> <span class="subxComment"># while currb < maxb</span>
<span id="L64" class="LineNr"> 64 </span> <span class="subxComment"># c1 = *currs</span>
<span id="L65" class="LineNr"> 65 </span> <span class="subxComment"># c2 = *currb</span>
<span id="L66" class="LineNr"> 66 </span> <span class="subxComment"># if (c1 != c2) return false</span>
<span id="L67" class="LineNr"> 67 </span> <span class="subxComment"># ++currs, ++currb</span>
<span id="L68" class="LineNr"> 68 </span> <span class="subxComment"># return true</span>
<span id="L69" class="LineNr"> 69 </span> <span class="subxComment">#</span>
<span id="L70" class="LineNr"> 70 </span> <span class="subxComment"># registers:</span>
<span id="L71" class="LineNr"> 71 </span> <span class="subxComment"># currs: esi</span>
<span id="L72" class="LineNr"> 72 </span> <span class="subxComment"># maxs: ecx</span>
<span id="L73" class="LineNr"> 73 </span> <span class="subxComment"># currb: edi</span>
<span id="L74" class="LineNr"> 74 </span> <span class="subxComment"># c1: eax</span>
<span id="L75" class="LineNr"> 75 </span> <span class="subxComment"># c2: ebx</span>
<span id="L76" class="LineNr"> 76 </span> <span class="subxComment">#</span>
<span id="L77" class="LineNr"> 77 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L78" class="LineNr"> 78 </span> 55/push-ebp
<span id="L79" class="LineNr"> 79 </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="L80" class="LineNr"> 80 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L81" class="LineNr"> 81 </span> 51/push-ecx
<span id="L82" class="LineNr"> 82 </span> 52/push-edx
<span id="L83" class="LineNr"> 83 </span> 56/push-esi
<span id="L84" class="LineNr"> 84 </span> 57/push-edi
<span id="L85" class="LineNr"> 85 </span> <span class="subxComment"># esi = s</span>
<span id="L86" class="LineNr"> 86 </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="L87" class="LineNr"> 87 </span> <span class="subxComment"># edi = benchmark</span>
<span id="L88" class="LineNr"> 88 </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="L89" class="LineNr"> 89 </span> <span class="subxComment"># var bsize/ecx: int = benchmark->size</span>
<span id="L90" class="LineNr"> 90 </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="L91" class="LineNr"> 91 </span><span class="Constant">$string-starts-with?:sizes</span>:
<span id="L92" class="LineNr"> 92 </span> <span class="subxComment"># if (s->size < bsize) return false</span>
<span id="L93" class="LineNr"> 93 </span> 39/compare 0/mod/indirect 6/rm32/esi <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 *esi with ecx</span>
<span id="L94" class="LineNr"> 94 </span> 7c/jump-if-< $string-starts-with?:false/disp8
<span id="L95" class="LineNr"> 95 </span> <span class="subxComment"># var currs/esi: (addr byte) = s->data</span>
<span id="L96" class="LineNr"> 96 </span> 81 0/subop/add 3/mod/direct 6/rm32/esi <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 esi</span>
<span id="L97" class="LineNr"> 97 </span> <span class="subxComment"># var currb/edi: (addr byte) = benchmark->data</span>
<span id="L98" class="LineNr"> 98 </span> 81 0/subop/add 3/mod/direct 7/rm32/edi <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 edi</span>
<span id="L99" class="LineNr"> 99 </span> <span class="subxComment"># var maxb/ecx: (addr byte) = &benchmark->data[benchmark->size]</span>
<span id="L100" class="LineNr">100 </span> 01/add 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 7/r32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># add edi to ecx</span>
<span id="L101" class="LineNr">101 </span> <span class="subxComment"># var c1/eax: byte = 0</span>
<span id="L102" class="LineNr">102 </span> 31/xor 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># clear eax</span>
<span id="L103" class="LineNr">103 </span> <span class="subxComment"># var c2/edx: byte = 0</span>
<span id="L104" class="LineNr">104 </span> 31/xor 3/mod/direct 2/rm32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># clear edx</span>
<span id="L105" class="LineNr">105 </span><span class="Constant">$string-starts-with?:loop</span>:
<span id="L106" class="LineNr">106 </span> <span class="subxComment"># if (currs >= maxs) return true</span>
<span id="L107" class="LineNr">107 </span> 39/compare 3/mod/direct 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"># compare edi with ecx</span>
<span id="L108" class="LineNr">108 </span> 73/jump-if-addr>= $string-starts-with?:true/disp8
<span id="L109" class="LineNr">109 </span> <span class="subxComment"># c1 = *currs</span>
<span id="L110" class="LineNr">110 </span> 8a/copy-byte 0/mod/indirect 6/rm32/esi <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 *esi to AL</span>
<span id="L111" class="LineNr">111 </span> <span class="subxComment"># c2 = *currb</span>
<span id="L112" class="LineNr">112 </span> 8a/copy-byte 0/mod/indirect 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/DL <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy byte at *edi to DL</span>
<span id="L113" class="LineNr">113 </span> <span class="subxComment"># if (c1 != c2) return false</span>
<span id="L114" class="LineNr">114 </span> 39/compare 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># compare eax and edx</span>
<span id="L115" class="LineNr">115 </span> 75/jump-if-!= $string-starts-with?:false/disp8
<span id="L116" class="LineNr">116 </span> <span class="subxComment"># ++currs</span>
<span id="L117" class="LineNr">117 </span> 46/increment-esi
<span id="L118" class="LineNr">118 </span> <span class="subxComment"># ++currb</span>
<span id="L119" class="LineNr">119 </span> 47/increment-edi
<span id="L120" class="LineNr">120 </span> eb/jump $string-starts-with?:<span class="Constant">loop</span>/disp8
<span id="L121" class="LineNr">121 </span><span class="Constant">$string-starts-with?:true</span>:
<span id="L122" class="LineNr">122 </span> b8/copy-to-eax 1/imm32
<span id="L123" class="LineNr">123 </span> eb/jump $string-starts-with?:end/disp8
<span id="L124" class="LineNr">124 </span><span class="Constant">$string-starts-with?:false</span>:
<span id="L125" class="LineNr">125 </span> b8/copy-to-eax 0/imm32
<span id="L126" class="LineNr">126 </span><span class="Constant">$string-starts-with?:end</span>:
<span id="L127" class="LineNr">127 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L128" class="LineNr">128 </span> 5f/pop-to-edi
<span id="L129" class="LineNr">129 </span> 5e/pop-to-esi
<span id="L130" class="LineNr">130 </span> 5a/pop-to-edx
<span id="L131" class="LineNr">131 </span> 59/pop-to-ecx
<span id="L132" class="LineNr">132 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L133" class="LineNr">133 </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="L134" class="LineNr">134 </span> 5d/pop-to-ebp
<span id="L135" class="LineNr">135 </span> c3/return
<span id="L136" class="LineNr">136 </span>
<span id="L137" class="LineNr">137 </span><span class="subxH1Comment"># - tests</span>
<span id="L138" class="LineNr">138 </span>
<span id="L139" class="LineNr">139 </span><span class="subxTest">test-compare-empty-with-empty-string</span>:
<span id="L140" class="LineNr">140 </span> <span class="subxComment"># eax = string-equal?("", "")</span>
<span id="L141" class="LineNr">141 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L142" class="LineNr">142 </span> 68/push <span class="Constant">""</span>/imm32
<span id="L143" class="LineNr">143 </span> 68/push <span class="Constant">""</span>/imm32
<span id="L144" class="LineNr">144 </span> <span class="subxS2Comment"># . . call</span>
<span id="L145" class="LineNr">145 </span> e8/call <a href='105string-equal.subx.html#L15'>string-equal?</a>/disp32
<span id="L146" class="LineNr">146 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L147" class="LineNr">147 </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="L148" class="LineNr">148 </span> <span class="subxComment"># check-ints-equal(eax, 1, msg)</span>
<span id="L149" class="LineNr">149 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L150" class="LineNr">150 </span> 68/push <span class="Constant">"F - test-compare-empty-with-empty-string"</span>/imm32
<span id="L151" class="LineNr">151 </span> 68/push 1/imm32/true
<span id="L152" class="LineNr">152 </span> 50/push-eax
<span id="L153" class="LineNr">153 </span> <span class="subxS2Comment"># . . call</span>
<span id="L154" class="LineNr">154 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
<span id="L155" class="LineNr">155 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L156" class="LineNr">156 </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="L157" class="LineNr">157 </span> c3/return
<span id="L158" class="LineNr">158 </span>
<span id="L159" class="LineNr">159 </span><span class="subxTest">test-compare-empty-with-non-empty-string</span>: <span class="subxComment"># also checks size-mismatch code path</span>
<span id="L160" class="LineNr">160 </span> <span class="subxComment"># eax = string-equal?("", "Abc")</span>
<span id="L161" class="LineNr">161 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L162" class="LineNr">162 </span> 68/push <span class="Constant">"Abc"</span>/imm32
<span id="L163" class="LineNr">163 </span> 68/push <span class="Constant">""</span>/imm32
<span id="L164" class="LineNr">164 </span> <span class="subxS2Comment"># . . call</span>
<span id="L165" class="LineNr">165 </span> e8/call <a href='105string-equal.subx.html#L15'>string-equal?</a>/disp32
<span id="L166" class="LineNr">166 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L167" class="LineNr">167 </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="L168" class="LineNr">168 </span> <span class="subxComment"># check-ints-equal(eax, 0, msg)</span>
<span id="L169" class="LineNr">169 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L170" class="LineNr">170 </span> 68/push <span class="Constant">"F - test-compare-empty-with-non-empty-string"</span>/imm32
<span id="L171" class="LineNr">171 </span> 68/push 0/imm32/false
<span id="L172" class="LineNr">172 </span> 50/push-eax
<span id="L173" class="LineNr">173 </span> <span class="subxS2Comment"># . . call</span>
<span id="L174" class="LineNr">174 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
<span id="L175" class="LineNr">175 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L176" class="LineNr">176 </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="L177" class="LineNr">177 </span> c3/return
<span id="L178" class="LineNr">178 </span>
<span id="L179" class="LineNr">179 </span><span class="subxTest">test-compare-equal-strings</span>:
<span id="L180" class="LineNr">180 </span> <span class="subxComment"># eax = string-equal?("Abc", "Abc")</span>
<span id="L181" class="LineNr">181 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L182" class="LineNr">182 </span> 68/push <span class="Constant">"Abc"</span>/imm32
<span id="L183" class="LineNr">183 </span> 68/push <span class="Constant">"Abc"</span>/imm32
<span id="L184" class="LineNr">184 </span> <span class="subxS2Comment"># . . call</span>
<span id="L185" class="LineNr">185 </span> e8/call <a href='105string-equal.subx.html#L15'>string-equal?</a>/disp32
<span id="L186" class="LineNr">186 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L187" class="LineNr">187 </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="L188" class="LineNr">188 </span> <span class="subxComment"># check-ints-equal(eax, 1, msg)</span>
<span id="L189" class="LineNr">189 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L190" class="LineNr">190 </span> 68/push <span class="Constant">"F - test-compare-equal-strings"</span>/imm32
<span id="L191" class="LineNr">191 </span> 68/push 1/imm32/true
<span id="L192" class="LineNr">192 </span> 50/push-eax
<span id="L193" class="LineNr">193 </span> <span class="subxS2Comment"># . . call</span>
<span id="L194" class="LineNr">194 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
<span id="L195" class="LineNr">195 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L196" class="LineNr">196 </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="L197" class="LineNr">197 </span> c3/return
<span id="L198" class="LineNr">198 </span>
<span id="L199" class="LineNr">199 </span><span class="subxTest">test-compare-inequal-strings-equal-sizes</span>:
<span id="L200" class="LineNr">200 </span> <span class="subxComment"># eax = string-equal?("Abc", "Adc")</span>
<span id="L201" class="LineNr">201 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L202" class="LineNr">202 </span> 68/push <span class="Constant">"Adc"</span>/imm32
<span id="L203" class="LineNr">203 </span> 68/push <span class="Constant">"Abc"</span>/imm32
<span id="L204" class="LineNr">204 </span> <span class="subxS2Comment"># . . call</span>
<span id="L205" class="LineNr">205 </span> e8/call <a href='105string-equal.subx.html#L15'>string-equal?</a>/disp32
<span id="L206" class="LineNr">206 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L207" class="LineNr">207 </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="L208" class="LineNr">208 </span> <span class="subxComment"># check-ints-equal(eax, 0, msg)</span>
<span id="L209" class="LineNr">209 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L210" class="LineNr">210 </span> 68/push <span class="Constant">"F - test-compare-inequal-strings-equal-sizes"</span>/imm32
<span id="L211" class="LineNr">211 </span> 68/push 0/imm32/false
<span id="L212" class="LineNr">212 </span> 50/push-eax
<span id="L213" class="LineNr">213 </span> <span class="subxS2Comment"># . . call</span>
<span id="L214" class="LineNr">214 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
<span id="L215" class="LineNr">215 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L216" class="LineNr">216 </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="L217" class="LineNr">217 </span> c3/return
<span id="L218" class="LineNr">218 </span>
<span id="L219" class="LineNr">219 </span><span class="subxComment"># helper for later tests</span>
<span id="L220" class="LineNr">220 </span><span class="subxFunction">check-strings-equal</span>: <span class="subxComment"># s: (addr array byte), expected: (addr array byte), msg: (addr array byte)</span>
<span id="L221" class="LineNr">221 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L222" class="LineNr">222 </span> 55/push-ebp
<span id="L223" class="LineNr">223 </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="L224" class="LineNr">224 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L225" class="LineNr">225 </span> 50/push-eax
<span id="L226" class="LineNr">226 </span> <span class="subxComment"># var eax: boolean = string-equal?(s, expected)</span>
<span id="L227" class="LineNr">227 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L228" class="LineNr">228 </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="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> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span>
<span id="L230" class="LineNr">230 </span> <span class="subxS2Comment"># . . call</span>
<span id="L231" class="LineNr">231 </span> e8/call <a href='105string-equal.subx.html#L15'>string-equal?</a>/disp32
<span id="L232" class="LineNr">232 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L233" class="LineNr">233 </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="L234" class="LineNr">234 </span> <span class="subxComment"># check-ints-equal(eax, 1, msg)</span>
<span id="L235" class="LineNr">235 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L236" class="LineNr">236 </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="L237" class="LineNr">237 </span> 68/push 1/imm32
<span id="L238" class="LineNr">238 </span> 50/push-eax
<span id="L239" class="LineNr">239 </span> <span class="subxS2Comment"># . . call</span>
<span id="L240" class="LineNr">240 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
<span id="L241" class="LineNr">241 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L242" class="LineNr">242 </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="L243" class="LineNr">243 </span><span class="Constant">$check-strings-equal:end</span>:
<span id="L244" class="LineNr">244 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L245" class="LineNr">245 </span> 58/pop-to-eax
<span id="L246" class="LineNr">246 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L247" class="LineNr">247 </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="L248" class="LineNr">248 </span> 5d/pop-to-ebp
<span id="L249" class="LineNr">249 </span> c3/return
<span id="L250" class="LineNr">250 </span>
<span id="L251" class="LineNr">251 </span><span class="subxComment"># test the helper</span>
<span id="L252" class="LineNr">252 </span><span class="subxTest">test-check-strings-equal</span>:
<span id="L253" class="LineNr">253 </span> <span class="subxComment"># check-strings-equal("Abc", "Abc")</span>
<span id="L254" class="LineNr">254 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L255" class="LineNr">255 </span> 68/push <span class="Constant">"Abc"</span>/imm32
<span id="L256" class="LineNr">256 </span> 68/push <span class="Constant">"Abc"</span>/imm32
<span id="L257" class="LineNr">257 </span> <span class="subxS2Comment"># . . call</span>
<span id="L258" class="LineNr">258 </span> e8/call <a href='105string-equal.subx.html#L220'>check-strings-equal</a>/disp32
<span id="L259" class="LineNr">259 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L260" class="LineNr">260 </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="L261" class="LineNr">261 </span> c3/return
<span id="L262" class="LineNr">262 </span>
<span id="L263" class="LineNr">263 </span><span class="subxS2Comment"># . . vim:nowrap:textwidth=0</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->
|