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
|
<!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 - rpn.mu</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-dark">
<style type="text/css">
<!--
pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #a8a8a8; }
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #a8a8a8; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.PreProc { color: #c000c0; }
.Special { color: #ff6060; }
.LineNr { }
.Constant { color: #008787; }
.Delimiter { color: #c000c0; }
.muFunction { color: #af5f00; text-decoration: underline; }
.muComment { color: #005faf; }
-->
</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/rpn.mu'>https://github.com/akkartik/mu/blob/main/rpn.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="muComment"># Integer arithmetic using postfix notation</span>
<span id="L2" class="LineNr"> 2 </span><span class="muComment">#</span>
<span id="L3" class="LineNr"> 3 </span><span class="muComment"># Limitations:</span>
<span id="L4" class="LineNr"> 4 </span><span class="muComment"># Division not implemented yet.</span>
<span id="L5" class="LineNr"> 5 </span><span class="muComment">#</span>
<span id="L6" class="LineNr"> 6 </span><span class="muComment"># To build:</span>
<span id="L7" class="LineNr"> 7 </span><span class="muComment"># $ ./translate rpn.mu</span>
<span id="L8" class="LineNr"> 8 </span><span class="muComment">#</span>
<span id="L9" class="LineNr"> 9 </span><span class="muComment"># Example session:</span>
<span id="L10" class="LineNr"> 10 </span><span class="muComment"># $ qemu-system-i386 code.img</span>
<span id="L11" class="LineNr"> 11 </span><span class="muComment"># > 4</span>
<span id="L12" class="LineNr"> 12 </span><span class="muComment"># 4</span>
<span id="L13" class="LineNr"> 13 </span><span class="muComment"># > 5 3 -</span>
<span id="L14" class="LineNr"> 14 </span><span class="muComment"># 2</span>
<span id="L15" class="LineNr"> 15 </span><span class="muComment">#</span>
<span id="L16" class="LineNr"> 16 </span><span class="muComment"># Error handling is non-existent. This is just a prototype.</span>
<span id="L17" class="LineNr"> 17 </span>
<span id="L18" class="LineNr"> 18 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='rpn.mu.html#L18'>main</a></span> <a href='500fake-screen.mu.html#L14'>screen</a>: (addr <a href='500fake-screen.mu.html#L14'>screen</a>), keyboard: (addr keyboard), data-disk: (addr disk) <span class="Delimiter">{</span>
<span id="L19" class="LineNr"> 19 </span> <span class="PreProc">var</span> in-storage: (stream byte <span class="Constant">0x80</span>)
<span id="L20" class="LineNr"> 20 </span> <span class="PreProc">var</span> in/<span class="Constant">esi</span>: (addr stream byte) <span class="Special"><-</span> address in-storage
<span id="L21" class="LineNr"> 21 </span> <span class="PreProc">var</span> y/<span class="Constant">ecx</span>: int <span class="Special"><-</span> copy <span class="Constant">0</span>
<span id="L22" class="LineNr"> 22 </span> <span class="PreProc">var</span> space/<span class="Constant">edx</span>: grapheme <span class="Special"><-</span> copy <span class="Constant">0x20</span>
<span id="L23" class="LineNr"> 23 </span> <span class="muComment"># read-eval-print loop</span>
<span id="L24" class="LineNr"> 24 </span> <span class="Delimiter">{</span>
<span id="L25" class="LineNr"> 25 </span> <span class="muComment"># print prompt</span>
<span id="L26" class="LineNr"> 26 </span> <span class="PreProc">var</span> x/<span class="Constant">eax</span>: int <span class="Special"><-</span> <a href='501draw-text.mu.html#L100'>draw-text-rightward</a> <a href='500fake-screen.mu.html#L14'>screen</a>, <span class="Constant">"> "</span>, <span class="Constant">0</span>/x, <span class="Constant">0x80</span>/xmax, y, <span class="Constant">3</span>/fg/cyan, <span class="Constant">0</span>/bg
<span id="L27" class="LineNr"> 27 </span> <span class="muComment"># read line from keyboard</span>
<span id="L28" class="LineNr"> 28 </span> <a href='106stream.subx.html#L20'>clear-stream</a> in
<span id="L29" class="LineNr"> 29 </span> <span class="Delimiter">{</span>
<span id="L30" class="LineNr"> 30 </span> <a href='500fake-screen.mu.html#L216'>draw-cursor</a> <a href='500fake-screen.mu.html#L14'>screen</a>, space
<span id="L31" class="LineNr"> 31 </span> <span class="PreProc">var</span> key/<span class="Constant">eax</span>: byte <span class="Special"><-</span> <a href='102keyboard.subx.html#L21'>read-key</a> keyboard
<span id="L32" class="LineNr"> 32 </span> compare key, <span class="Constant">0xa</span>/newline
<span id="L33" class="LineNr"> 33 </span> <span class="PreProc">break-if-=</span>
<span id="L34" class="LineNr"> 34 </span> compare key, <span class="Constant">0</span>
<span id="L35" class="LineNr"> 35 </span> <span class="PreProc">loop-if-=</span>
<span id="L36" class="LineNr"> 36 </span> <span class="PreProc">var</span> key2/<span class="Constant">eax</span>: int <span class="Special"><-</span> copy key
<span id="L37" class="LineNr"> 37 </span> <a href='115write-byte.subx.html#L12'>append-byte</a> in, key2
<span id="L38" class="LineNr"> 38 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="Special"><-</span> copy key2
<span id="L39" class="LineNr"> 39 </span> <a href='501draw-text.mu.html#L84'>draw-grapheme-at-cursor</a> <a href='500fake-screen.mu.html#L14'>screen</a>, g, <span class="Constant">0xf</span>/fg, <span class="Constant">0</span>/bg
<span id="L40" class="LineNr"> 40 </span> <a href='501draw-text.mu.html#L16'>move-cursor-right</a> <span class="Constant">0</span>
<span id="L41" class="LineNr"> 41 </span> <span class="PreProc">loop</span>
<span id="L42" class="LineNr"> 42 </span> <span class="Delimiter">}</span>
<span id="L43" class="LineNr"> 43 </span> <span class="muComment"># clear cursor</span>
<span id="L44" class="LineNr"> 44 </span> <a href='501draw-text.mu.html#L84'>draw-grapheme-at-cursor</a> <a href='500fake-screen.mu.html#L14'>screen</a>, space, <span class="Constant">3</span>/fg/never-used, <span class="Constant">0</span>/bg
<span id="L45" class="LineNr"> 45 </span> <span class="muComment"># parse and eval</span>
<span id="L46" class="LineNr"> 46 </span> <span class="PreProc">var</span> out/<span class="Constant">eax</span>: int <span class="Special"><-</span> <a href='rpn.mu.html#L62'>simplify</a> in
<span id="L47" class="LineNr"> 47 </span> <span class="muComment"># print</span>
<span id="L48" class="LineNr"> 48 </span> y <span class="Special"><-</span> increment
<span id="L49" class="LineNr"> 49 </span> out, y <span class="Special"><-</span> <a href='501draw-text.mu.html#L319'>draw-int32-decimal-wrapping-right-then-down</a> <a href='500fake-screen.mu.html#L14'>screen</a>, out, <span class="Constant">0</span>/xmin, y, <span class="Constant">0x80</span>/xmax, <span class="Constant">0x30</span>/ymax, <span class="Constant">0</span>/x, y, <span class="Constant">7</span>/fg, <span class="Constant">0</span>/bg
<span id="L50" class="LineNr"> 50 </span> <span class="muComment"># newline</span>
<span id="L51" class="LineNr"> 51 </span> y <span class="Special"><-</span> increment
<span id="L52" class="LineNr"> 52 </span> <span class="muComment">#</span>
<span id="L53" class="LineNr"> 53 </span> <span class="PreProc">loop</span>
<span id="L54" class="LineNr"> 54 </span> <span class="Delimiter">}</span>
<span id="L55" class="LineNr"> 55 </span><span class="Delimiter">}</span>
<span id="L56" class="LineNr"> 56 </span>
<span id="L57" class="LineNr"> 57 </span><span class="PreProc">type</span> <a href='rpn.mu.html#L57'>int-stack</a> <span class="Delimiter">{</span>
<span id="L58" class="LineNr"> 58 </span> data: (handle array int)
<span id="L59" class="LineNr"> 59 </span> top: int
<span id="L60" class="LineNr"> 60 </span><span class="Delimiter">}</span>
<span id="L61" class="LineNr"> 61 </span>
<span id="L62" class="LineNr"> 62 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='rpn.mu.html#L62'>simplify</a></span> in: (addr stream byte)<span class="PreProc"> -> </span>_/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
<span id="L63" class="LineNr"> 63 </span> <span class="PreProc">var</span> word-storage: slice
<span id="L64" class="LineNr"> 64 </span> <span class="PreProc">var</span> word/<span class="Constant">ecx</span>: (addr slice) <span class="Special"><-</span> address word-storage
<span id="L65" class="LineNr"> 65 </span> <span class="PreProc">var</span> stack-storage: <a href='rpn.mu.html#L57'>int-stack</a>
<span id="L66" class="LineNr"> 66 </span> <span class="PreProc">var</span> stack/<span class="Constant">esi</span>: (addr <a href='rpn.mu.html#L57'>int-stack</a>) <span class="Special"><-</span> address stack-storage
<span id="L67" class="LineNr"> 67 </span> <a href='rpn.mu.html#L116'>initialize-int-stack</a> stack, <span class="Constant">0x10</span>
<span id="L68" class="LineNr"> 68 </span> $simplify:word-loop: <span class="Delimiter">{</span>
<span id="L69" class="LineNr"> 69 </span> <a href='127next-word.subx.html#L11'>next-word</a> in, word
<span id="L70" class="LineNr"> 70 </span> <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="Special"><-</span> <a href='123slice.subx.html#L9'>slice-empty?</a> word
<span id="L71" class="LineNr"> 71 </span> compare done?, <span class="Constant">0</span>
<span id="L72" class="LineNr"> 72 </span> <span class="PreProc">break-if-!=</span>
<span id="L73" class="LineNr"> 73 </span> <span class="muComment"># if word is an operator, perform it</span>
<span id="L74" class="LineNr"> 74 </span> <span class="Delimiter">{</span>
<span id="L75" class="LineNr"> 75 </span> <span class="PreProc">var</span> is-add?/<span class="Constant">eax</span>: boolean <span class="Special"><-</span> <a href='123slice.subx.html#L120'>slice-equal?</a> word, <span class="Constant">"+"</span>
<span id="L76" class="LineNr"> 76 </span> compare is-add?, <span class="Constant">0</span>
<span id="L77" class="LineNr"> 77 </span> <span class="PreProc">break-if-=</span>
<span id="L78" class="LineNr"> 78 </span> <span class="PreProc">var</span> _b/<span class="Constant">eax</span>: int <span class="Special"><-</span> <a href='rpn.mu.html#L136'>pop-int-stack</a> stack
<span id="L79" class="LineNr"> 79 </span> <span class="PreProc">var</span> b/<span class="Constant">edx</span>: int <span class="Special"><-</span> copy _b
<span id="L80" class="LineNr"> 80 </span> <span class="PreProc">var</span> a/<span class="Constant">eax</span>: int <span class="Special"><-</span> <a href='rpn.mu.html#L136'>pop-int-stack</a> stack
<span id="L81" class="LineNr"> 81 </span> a <span class="Special"><-</span> add b
<span id="L82" class="LineNr"> 82 </span> <a href='rpn.mu.html#L124'>push-int-stack</a> stack, a
<span id="L83" class="LineNr"> 83 </span> <span class="PreProc">loop</span> $simplify:word-loop
<span id="L84" class="LineNr"> 84 </span> <span class="Delimiter">}</span>
<span id="L85" class="LineNr"> 85 </span> <span class="Delimiter">{</span>
<span id="L86" class="LineNr"> 86 </span> <span class="PreProc">var</span> is-sub?/<span class="Constant">eax</span>: boolean <span class="Special"><-</span> <a href='123slice.subx.html#L120'>slice-equal?</a> word, <span class="Constant">"-"</span>
<span id="L87" class="LineNr"> 87 </span> compare is-sub?, <span class="Constant">0</span>
<span id="L88" class="LineNr"> 88 </span> <span class="PreProc">break-if-=</span>
<span id="L89" class="LineNr"> 89 </span> <span class="PreProc">var</span> _b/<span class="Constant">eax</span>: int <span class="Special"><-</span> <a href='rpn.mu.html#L136'>pop-int-stack</a> stack
<span id="L90" class="LineNr"> 90 </span> <span class="PreProc">var</span> b/<span class="Constant">edx</span>: int <span class="Special"><-</span> copy _b
<span id="L91" class="LineNr"> 91 </span> <span class="PreProc">var</span> a/<span class="Constant">eax</span>: int <span class="Special"><-</span> <a href='rpn.mu.html#L136'>pop-int-stack</a> stack
<span id="L92" class="LineNr"> 92 </span> a <span class="Special"><-</span> subtract b
<span id="L93" class="LineNr"> 93 </span> <a href='rpn.mu.html#L124'>push-int-stack</a> stack, a
<span id="L94" class="LineNr"> 94 </span> <span class="PreProc">loop</span> $simplify:word-loop
<span id="L95" class="LineNr"> 95 </span> <span class="Delimiter">}</span>
<span id="L96" class="LineNr"> 96 </span> <span class="Delimiter">{</span>
<span id="L97" class="LineNr"> 97 </span> <span class="PreProc">var</span> is-mul?/<span class="Constant">eax</span>: boolean <span class="Special"><-</span> <a href='123slice.subx.html#L120'>slice-equal?</a> word, <span class="Constant">"*"</span>
<span id="L98" class="LineNr"> 98 </span> compare is-mul?, <span class="Constant">0</span>
<span id="L99" class="LineNr"> 99 </span> <span class="PreProc">break-if-=</span>
<span id="L100" class="LineNr">100 </span> <span class="PreProc">var</span> _b/<span class="Constant">eax</span>: int <span class="Special"><-</span> <a href='rpn.mu.html#L136'>pop-int-stack</a> stack
<span id="L101" class="LineNr">101 </span> <span class="PreProc">var</span> b/<span class="Constant">edx</span>: int <span class="Special"><-</span> copy _b
<span id="L102" class="LineNr">102 </span> <span class="PreProc">var</span> a/<span class="Constant">eax</span>: int <span class="Special"><-</span> <a href='rpn.mu.html#L136'>pop-int-stack</a> stack
<span id="L103" class="LineNr">103 </span> a <span class="Special"><-</span> multiply b
<span id="L104" class="LineNr">104 </span> <a href='rpn.mu.html#L124'>push-int-stack</a> stack, a
<span id="L105" class="LineNr">105 </span> <span class="PreProc">loop</span> $simplify:word-loop
<span id="L106" class="LineNr">106 </span> <span class="Delimiter">}</span>
<span id="L107" class="LineNr">107 </span> <span class="muComment"># otherwise it's an int</span>
<span id="L108" class="LineNr">108 </span> <span class="PreProc">var</span> n/<span class="Constant">eax</span>: int <span class="Special"><-</span> <a href='311decimal-int.subx.html#L4'>parse-decimal-int-from-slice</a> word
<span id="L109" class="LineNr">109 </span> <a href='rpn.mu.html#L124'>push-int-stack</a> stack, n
<span id="L110" class="LineNr">110 </span> <span class="PreProc">loop</span>
<span id="L111" class="LineNr">111 </span> <span class="Delimiter">}</span>
<span id="L112" class="LineNr">112 </span> <span class="PreProc">var</span> result/<span class="Constant">eax</span>: int <span class="Special"><-</span> <a href='rpn.mu.html#L136'>pop-int-stack</a> stack
<span id="L113" class="LineNr">113 </span> <span class="PreProc">return</span> result
<span id="L114" class="LineNr">114 </span><span class="Delimiter">}</span>
<span id="L115" class="LineNr">115 </span>
<span id="L116" class="LineNr">116 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='rpn.mu.html#L116'>initialize-int-stack</a></span> _self: (addr <a href='rpn.mu.html#L57'>int-stack</a>), n: int <span class="Delimiter">{</span>
<span id="L117" class="LineNr">117 </span> <span class="PreProc">var</span> self/<span class="Constant">esi</span>: (addr <a href='rpn.mu.html#L57'>int-stack</a>) <span class="Special"><-</span> copy _self
<span id="L118" class="LineNr">118 </span> <span class="PreProc">var</span> d/<span class="Constant">edi</span>: (addr handle array int) <span class="Special"><-</span> get self, data
<span id="L119" class="LineNr">119 </span> populate d, n
<span id="L120" class="LineNr">120 </span> <span class="PreProc">var</span> top/<span class="Constant">eax</span>: (addr int) <span class="Special"><-</span> get self, top
<span id="L121" class="LineNr">121 </span> copy-to *top, <span class="Constant">0</span>
<span id="L122" class="LineNr">122 </span><span class="Delimiter">}</span>
<span id="L123" class="LineNr">123 </span>
<span id="L124" class="LineNr">124 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='rpn.mu.html#L124'>push-int-stack</a></span> _self: (addr <a href='rpn.mu.html#L57'>int-stack</a>), _val: int <span class="Delimiter">{</span>
<span id="L125" class="LineNr">125 </span> <span class="PreProc">var</span> self/<span class="Constant">esi</span>: (addr <a href='rpn.mu.html#L57'>int-stack</a>) <span class="Special"><-</span> copy _self
<span id="L126" class="LineNr">126 </span> <span class="PreProc">var</span> top-addr/<span class="Constant">ecx</span>: (addr int) <span class="Special"><-</span> get self, top
<span id="L127" class="LineNr">127 </span> <span class="PreProc">var</span> data-ah/<span class="Constant">edx</span>: (addr handle array int) <span class="Special"><-</span> get self, data
<span id="L128" class="LineNr">128 </span> <span class="PreProc">var</span> data/<span class="Constant">eax</span>: (addr array int) <span class="Special"><-</span> <a href='120allocate.subx.html#L223'>lookup</a> *data-ah
<span id="L129" class="LineNr">129 </span> <span class="PreProc">var</span> top/<span class="Constant">edx</span>: int <span class="Special"><-</span> copy *top-addr
<span id="L130" class="LineNr">130 </span> <span class="PreProc">var</span> dest-addr/<span class="Constant">edx</span>: (addr int) <span class="Special"><-</span> index data, top
<span id="L131" class="LineNr">131 </span> <span class="PreProc">var</span> val/<span class="Constant">eax</span>: int <span class="Special"><-</span> copy _val
<span id="L132" class="LineNr">132 </span> copy-to *dest-addr, val
<span id="L133" class="LineNr">133 </span> add-to *top-addr, <span class="Constant">1</span>
<span id="L134" class="LineNr">134 </span><span class="Delimiter">}</span>
<span id="L135" class="LineNr">135 </span>
<span id="L136" class="LineNr">136 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='rpn.mu.html#L136'>pop-int-stack</a></span> _self: (addr <a href='rpn.mu.html#L57'>int-stack</a>)<span class="PreProc"> -> </span>_/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
<span id="L137" class="LineNr">137 </span> <span class="PreProc">var</span> self/<span class="Constant">esi</span>: (addr <a href='rpn.mu.html#L57'>int-stack</a>) <span class="Special"><-</span> copy _self
<span id="L138" class="LineNr">138 </span> <span class="PreProc">var</span> top-addr/<span class="Constant">ecx</span>: (addr int) <span class="Special"><-</span> get self, top
<span id="L139" class="LineNr">139 </span> <span class="Delimiter">{</span>
<span id="L140" class="LineNr">140 </span> compare *top-addr, <span class="Constant">0</span>
<span id="L141" class="LineNr">141 </span> <span class="PreProc">break-if-></span>
<span id="L142" class="LineNr">142 </span> <span class="PreProc">return</span> <span class="Constant">0</span>
<span id="L143" class="LineNr">143 </span> <span class="Delimiter">}</span>
<span id="L144" class="LineNr">144 </span> subtract-from *top-addr, <span class="Constant">1</span>
<span id="L145" class="LineNr">145 </span> <span class="PreProc">var</span> data-ah/<span class="Constant">edx</span>: (addr handle array int) <span class="Special"><-</span> get self, data
<span id="L146" class="LineNr">146 </span> <span class="PreProc">var</span> data/<span class="Constant">eax</span>: (addr array int) <span class="Special"><-</span> <a href='120allocate.subx.html#L223'>lookup</a> *data-ah
<span id="L147" class="LineNr">147 </span> <span class="PreProc">var</span> top/<span class="Constant">edx</span>: int <span class="Special"><-</span> copy *top-addr
<span id="L148" class="LineNr">148 </span> <span class="PreProc">var</span> result-addr/<span class="Constant">eax</span>: (addr int) <span class="Special"><-</span> index data, top
<span id="L149" class="LineNr">149 </span> <span class="PreProc">var</span> val/<span class="Constant">eax</span>: int <span class="Special"><-</span> copy *result-addr
<span id="L150" class="LineNr">150 </span> <span class="PreProc">return</span> val
<span id="L151" class="LineNr">151 </span><span class="Delimiter">}</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->
|