blob: 351b9e9dbd91d6f744ee703e1adbe1da31f7fd59 (
plain) (
blame)
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
|
<!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 - 310copy-bytes.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; }
.SpecialChar { color: #d70000; }
.subxComment { color: #005faf; }
.subxS1Comment { color: #0000af; }
.LineNr { }
.subxTest { color: #5f8700; }
.subxFunction { color: #af5f00; text-decoration: underline; }
.Constant { color: #008787; }
-->
</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/310copy-bytes.subx'>https://github.com/akkartik/mu/blob/main/310copy-bytes.subx</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># Some helpers for copying non-overlapping regions of memory.</span>
<span id="L2" class="LineNr"> 2 </span><span class="subxComment"># Really only intended to be called from code generated by mu.subx.</span>
<span id="L3" class="LineNr"> 3 </span>
<span id="L4" class="LineNr"> 4 </span>== code
<span id="L5" class="LineNr"> 5 </span>
<span id="L6" class="LineNr"> 6 </span><span class="subxFunction">copy-bytes</span>: <span class="subxComment"># src: (addr byte), dest: (addr byte), size: int</span>
<span id="L7" class="LineNr"> 7 </span> <span class="subxComment"># pseudocode:</span>
<span id="L8" class="LineNr"> 8 </span> <span class="subxComment"># curr-src/esi = src</span>
<span id="L9" class="LineNr"> 9 </span> <span class="subxComment"># curr-dest/edi = dest</span>
<span id="L10" class="LineNr"> 10 </span> <span class="subxComment"># i/ecx = 0</span>
<span id="L11" class="LineNr"> 11 </span> <span class="subxComment"># while true</span>
<span id="L12" class="LineNr"> 12 </span> <span class="subxComment"># if (i >= size) break</span>
<span id="L13" class="LineNr"> 13 </span> <span class="subxComment"># *curr-dest = *curr-src</span>
<span id="L14" class="LineNr"> 14 </span> <span class="subxComment"># ++curr-src</span>
<span id="L15" class="LineNr"> 15 </span> <span class="subxComment"># ++curr-dest</span>
<span id="L16" class="LineNr"> 16 </span> <span class="subxComment"># ++i</span>
<span id="L17" class="LineNr"> 17 </span> <span class="subxComment">#</span>
<span id="L18" class="LineNr"> 18 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L19" class="LineNr"> 19 </span> 55/push-ebp
<span id="L20" class="LineNr"> 20 </span> 89/<- %ebp 4/r32/esp
<span id="L21" class="LineNr"> 21 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L22" class="LineNr"> 22 </span> 50/push-eax
<span id="L23" class="LineNr"> 23 </span> 51/push-ecx
<span id="L24" class="LineNr"> 24 </span> 52/push-edx
<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"># curr-src/esi = src</span>
<span id="L28" class="LineNr"> 28 </span> 8b/-> *(ebp+8) 6/r32/esi
<span id="L29" class="LineNr"> 29 </span> <span class="subxComment"># curr-dest/edi = dest</span>
<span id="L30" class="LineNr"> 30 </span> 8b/-> *(ebp+0xc) 7/r32/edi
<span id="L31" class="LineNr"> 31 </span> <span class="subxComment"># var i/ecx: int = 0</span>
<span id="L32" class="LineNr"> 32 </span> b9/copy-to-ecx 0/imm32
<span id="L33" class="LineNr"> 33 </span> <span class="subxComment"># edx = size</span>
<span id="L34" class="LineNr"> 34 </span> 8b/-> *(ebp+0x10) 2/r32/edx
<span id="L35" class="LineNr"> 35 </span> {
<span id="L36" class="LineNr"> 36 </span> <span class="subxComment"># if (i >= size) break</span>
<span id="L37" class="LineNr"> 37 </span> 39/compare %ecx 2/r32/edx
<span id="L38" class="LineNr"> 38 </span> 7d/jump-if->= <span class="Constant">break</span>/disp8
<span id="L39" class="LineNr"> 39 </span> <span class="subxComment"># *curr-dest = *curr-src</span>
<span id="L40" class="LineNr"> 40 </span> 8a/byte-> *esi 0/r32/AL
<span id="L41" class="LineNr"> 41 </span> 88/byte<- *edi 0/r32/AL
<span id="L42" class="LineNr"> 42 </span> <span class="subxComment"># update</span>
<span id="L43" class="LineNr"> 43 </span> 46/increment-esi
<span id="L44" class="LineNr"> 44 </span> 47/increment-edi
<span id="L45" class="LineNr"> 45 </span> 41/increment-ecx
<span id="L46" class="LineNr"> 46 </span> eb/jump <span class="Constant">loop</span>/disp8
<span id="L47" class="LineNr"> 47 </span> }
<span id="L48" class="LineNr"> 48 </span><span class="Constant">$copy-bytes:end</span>:
<span id="L49" class="LineNr"> 49 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L50" class="LineNr"> 50 </span> 5f/pop-to-edi
<span id="L51" class="LineNr"> 51 </span> 5e/pop-to-esi
<span id="L52" class="LineNr"> 52 </span> 5a/pop-to-edx
<span id="L53" class="LineNr"> 53 </span> 59/pop-to-ecx
<span id="L54" class="LineNr"> 54 </span> 58/pop-to-eax
<span id="L55" class="LineNr"> 55 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L56" class="LineNr"> 56 </span> 89/<- %esp 5/r32/ebp
<span id="L57" class="LineNr"> 57 </span> 5d/pop-to-ebp
<span id="L58" class="LineNr"> 58 </span> c3/return
<span id="L59" class="LineNr"> 59 </span>
<span id="L60" class="LineNr"> 60 </span><span class="subxFunction">stream-to-array</span>: <span class="subxComment"># in: (addr stream _), out: (addr handle array _)</span>
<span id="L61" class="LineNr"> 61 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L62" class="LineNr"> 62 </span> 55/push-ebp
<span id="L63" class="LineNr"> 63 </span> 89/<- %ebp 4/r32/esp
<span id="L64" class="LineNr"> 64 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L65" class="LineNr"> 65 </span> 50/push-eax
<span id="L66" class="LineNr"> 66 </span> 51/push-ecx
<span id="L67" class="LineNr"> 67 </span> 52/push-edx
<span id="L68" class="LineNr"> 68 </span> 56/push-esi
<span id="L69" class="LineNr"> 69 </span> <span class="subxComment"># esi = s</span>
<span id="L70" class="LineNr"> 70 </span> 8b/-> *(ebp+8) 6/r32/esi
<span id="L71" class="LineNr"> 71 </span> <span class="subxComment"># var len/ecx: int = s->write - s->read</span>
<span id="L72" class="LineNr"> 72 </span> 8b/-> *esi 1/r32/ecx
<span id="L73" class="LineNr"> 73 </span> 2b/subtract *(esi+4) 1/r32/ecx
<span id="L74" class="LineNr"> 74 </span> <span class="subxComment"># allocate</span>
<span id="L75" class="LineNr"> 75 </span> (<a href='120allocate.subx.html#L535'>allocate-array</a> <span class="SpecialChar"><a href='120allocate.subx.html#L27'>Heap</a></span> %ecx *(ebp+0xc))
<span id="L76" class="LineNr"> 76 </span> <span class="subxComment"># var in/edx: (addr byte) = s->data + s->read</span>
<span id="L77" class="LineNr"> 77 </span> 8b/-> *(esi+4) 2/r32/edx
<span id="L78" class="LineNr"> 78 </span> 8d/copy-address *(esi+edx+0xc) 2/r32/edx
<span id="L79" class="LineNr"> 79 </span> <span class="subxComment"># var dest/eax: (addr byte) = data for out</span>
<span id="L80" class="LineNr"> 80 </span> 8b/-> *(ebp+0xc) 0/r32/eax
<span id="L81" class="LineNr"> 81 </span> (<a href='120allocate.subx.html#L226'>lookup</a> *eax *(eax+4)) <span class="subxComment"># => eax</span>
<span id="L82" class="LineNr"> 82 </span> 8d/copy-address *(eax+4) 0/r32/eax
<span id="L83" class="LineNr"> 83 </span> <span class="subxComment">#</span>
<span id="L84" class="LineNr"> 84 </span> (<a href='310copy-bytes.subx.html#L6'>copy-bytes</a> %edx %eax %ecx)
<span id="L85" class="LineNr"> 85 </span><span class="Constant">$stream-to-array:end</span>:
<span id="L86" class="LineNr"> 86 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L87" class="LineNr"> 87 </span> 5e/pop-to-esi
<span id="L88" class="LineNr"> 88 </span> 5a/pop-to-edx
<span id="L89" class="LineNr"> 89 </span> 59/pop-to-ecx
<span id="L90" class="LineNr"> 90 </span> 58/pop-to-eax
<span id="L91" class="LineNr"> 91 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L92" class="LineNr"> 92 </span> 89/<- %esp 5/r32/ebp
<span id="L93" class="LineNr"> 93 </span> 5d/pop-to-ebp
<span id="L94" class="LineNr"> 94 </span> c3/return
<span id="L95" class="LineNr"> 95 </span>
<span id="L96" class="LineNr"> 96 </span><span class="subxTest">test-stream-to-array</span>:
<span id="L97" class="LineNr"> 97 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L98" class="LineNr"> 98 </span> 55/push-ebp
<span id="L99" class="LineNr"> 99 </span> 89/<- %ebp 4/r32/esp
<span id="L100" class="LineNr">100 </span> <span class="subxComment"># setup</span>
<span id="L101" class="LineNr">101 </span> (<a href='106stream.subx.html#L20'>clear-stream</a> <a href='112read-byte.subx.html#L50'>_test-input-stream</a>)
<span id="L102" class="LineNr">102 </span> (<a href='108write.subx.html#L11'>write</a> <a href='112read-byte.subx.html#L50'>_test-input-stream</a> <span class="Constant">"abc"</span>)
<span id="L103" class="LineNr">103 </span> <span class="subxComment"># skip something</span>
<span id="L104" class="LineNr">104 </span> (<a href='112read-byte.subx.html#L13'>read-byte</a> <a href='112read-byte.subx.html#L50'>_test-input-stream</a>) <span class="subxComment"># => eax</span>
<span id="L105" class="LineNr">105 </span> <span class="subxComment"># var out/ecx: (handle array byte)</span>
<span id="L106" class="LineNr">106 </span> 68/push 0/imm32
<span id="L107" class="LineNr">107 </span> 68/push 0/imm32
<span id="L108" class="LineNr">108 </span> 89/<- %ecx 4/r32/esp
<span id="L109" class="LineNr">109 </span> <span class="subxComment">#</span>
<span id="L110" class="LineNr">110 </span> (<a href='310copy-bytes.subx.html#L60'>stream-to-array</a> <a href='112read-byte.subx.html#L50'>_test-input-stream</a> %ecx)
<span id="L111" class="LineNr">111 </span> (<a href='120allocate.subx.html#L226'>lookup</a> *ecx *(ecx+4)) <span class="subxComment"># => eax</span>
<span id="L112" class="LineNr">112 </span> (<a href='105string-equal.subx.html#L213'>check-strings-equal</a> %eax <span class="Constant">"bc"</span>)
<span id="L113" class="LineNr">113 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L114" class="LineNr">114 </span> 89/<- %esp 5/r32/ebp
<span id="L115" class="LineNr">115 </span> 5d/pop-to-ebp
<span id="L116" class="LineNr">116 </span> c3/return
<span id="L117" class="LineNr">117 </span>
<span id="L118" class="LineNr">118 </span><span class="subxComment"># like stream-to-array but ignore surrounding quotes</span>
<span id="L119" class="LineNr">119 </span><span class="subxComment"># we might do other stuff here later</span>
<span id="L120" class="LineNr">120 </span><span class="subxFunction">unquote-stream-to-array</span>: <span class="subxComment"># in: (addr stream _), out: (addr handle array _)</span>
<span id="L121" class="LineNr">121 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L122" class="LineNr">122 </span> 55/push-ebp
<span id="L123" class="LineNr">123 </span> 89/<- %ebp 4/r32/esp
<span id="L124" class="LineNr">124 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L125" class="LineNr">125 </span> 50/push-eax
<span id="L126" class="LineNr">126 </span> 51/push-ecx
<span id="L127" class="LineNr">127 </span> 52/push-edx
<span id="L128" class="LineNr">128 </span> 56/push-esi
<span id="L129" class="LineNr">129 </span> <span class="subxComment"># esi = s</span>
<span id="L130" class="LineNr">130 </span> 8b/-> *(ebp+8) 6/r32/esi
<span id="L131" class="LineNr">131 </span> <span class="subxComment"># var len/ecx: int = s->write - s->read - 2</span>
<span id="L132" class="LineNr">132 </span> 8b/-> *esi 1/r32/ecx
<span id="L133" class="LineNr">133 </span> 2b/subtract *(esi+4) 1/r32/ecx
<span id="L134" class="LineNr">134 </span> 81 7/subop/compare %ecx 2/imm32
<span id="L135" class="LineNr">135 </span> 7c/jump-if-< $unquote-stream-to-array:end/disp8
<span id="L136" class="LineNr">136 </span> 81 5/subop/subtract %ecx 2/imm32
<span id="L137" class="LineNr">137 </span> <span class="subxComment"># allocate</span>
<span id="L138" class="LineNr">138 </span> (<a href='120allocate.subx.html#L535'>allocate-array</a> <span class="SpecialChar"><a href='120allocate.subx.html#L27'>Heap</a></span> %ecx *(ebp+0xc))
<span id="L139" class="LineNr">139 </span> <span class="subxComment"># var in/edx: (addr byte) = s->data + s->read + 1</span>
<span id="L140" class="LineNr">140 </span> 8b/-> *(esi+4) 2/r32/edx
<span id="L141" class="LineNr">141 </span> 8d/copy-address *(esi+edx+0xd) 2/r32/edx <span class="subxComment"># Stream-data + 1</span>
<span id="L142" class="LineNr">142 </span> <span class="subxComment"># var dest/eax: (addr byte) = data for out</span>
<span id="L143" class="LineNr">143 </span> 8b/-> *(ebp+0xc) 0/r32/eax
<span id="L144" class="LineNr">144 </span> (<a href='120allocate.subx.html#L226'>lookup</a> *eax *(eax+4)) <span class="subxComment"># => eax</span>
<span id="L145" class="LineNr">145 </span> 8d/copy-address *(eax+4) 0/r32/eax
<span id="L146" class="LineNr">146 </span> <span class="subxComment">#</span>
<span id="L147" class="LineNr">147 </span> (<a href='310copy-bytes.subx.html#L6'>copy-bytes</a> %edx %eax %ecx)
<span id="L148" class="LineNr">148 </span><span class="Constant">$unquote-stream-to-array:end</span>:
<span id="L149" class="LineNr">149 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L150" class="LineNr">150 </span> 5e/pop-to-esi
<span id="L151" class="LineNr">151 </span> 5a/pop-to-edx
<span id="L152" class="LineNr">152 </span> 59/pop-to-ecx
<span id="L153" class="LineNr">153 </span> 58/pop-to-eax
<span id="L154" class="LineNr">154 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L155" class="LineNr">155 </span> 89/<- %esp 5/r32/ebp
<span id="L156" class="LineNr">156 </span> 5d/pop-to-ebp
<span id="L157" class="LineNr">157 </span> c3/return
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->
|