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Matt
/
mipsjs
mirror de https://github.com/matt-coles/mipsjs
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Initial commit

Matt Coles 9 anos atrás
commit
432c54a056
7 arquivos alterados com 191 adições e 0 exclusões
Visão dividida Mostrar estatísticas do Diff
  1. 26 0
      index.css
  2. 82 0
      index.html
  3. 1 0
      index.js
  4. 16 0
      js/assembler.js
  5. 29 0
      js/encoders.js
  6. 2 0
      js/test.asm
  7. 35 0
      js/utils.js

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index.css
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+textarea {
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+  font-family: 'Source Code Pro', monospace;
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+  font-size: 14px !important;
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+  resize: none;
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+}
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+
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+html, body {
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+  height:100%;
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+}
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+
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+canvas {
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+  background-color: #000;
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+  margin-left: auto;
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+  margin-right: auto;
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+  width: 160px;
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+  height: 160px;
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+  display: block;
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+}
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+
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+#code {
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+  height:75vh;
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+}
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+
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+.buttons {
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+  margin-bottom: 2%;
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+}

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index.html
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+<!DOCTYPE html>
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+<html lang="en">
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+  <head>
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+    <meta charset="utf-8">
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+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
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+    <meta name="viewport" content="width=device-width, initial-scale=1">
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+    <!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
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+    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
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+    <!-- <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous"> -->
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+    <link href="https://fonts.googleapis.com/css?family=Source+Code+Pro" rel="stylesheet">
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+    <link rel="stylesheet" href="index.css">
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+    <title>MIPS.js</title>
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+
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+    <link href='https://fonts.googleapis.com/css?family=Work+Sans' rel='stylesheet' type='text/css'>
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+
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+    <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
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+    <!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
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+    <!--[if lt IE 9]>
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+      <script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
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+      <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
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+    <![endif]-->
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+  </head>
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+  <body>
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+    <div class="container">
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+      <div class="row">
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+        <h1>MIPS.js <small>See MIPS run, really!</small></h1>
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+        <hr />
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+      </div>
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+      <div class="row">
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+        <div class="col-md-4">
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+          <p>
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+          <span class="buttons">
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+            <button class="btn btn-primary">Assemble</button>
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+            <button class="btn btn-success">Run</button>
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+            <button class="btn btn-warning">Step</button>
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+          </span>
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+          </p>
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+        </div>
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+      </div>
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+      <div class="row">
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+        <div class="col-md-4">
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+          <textarea placeholder="Try some assembly here..." class="form-control" id="code"></textarea>
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+        </div>
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+        <div class="row">
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+          <div class="col-md-2">
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+            <canvas id="display"></canvas>
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+            <hr />
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+            <p class="text-center">PC: 0xbfc0 0000</p>
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+          </div>
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+          <div class="col-md-3">
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+            <table class="table table-condensed table-responsive">
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+              <thead>
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+                <tr><th>GPR</th><th>Value</th><th>GPR</th><th>Value</th></tr>
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+              </thead>
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+              <tbody>
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+                <tr><th class="zero active">zero</th><td class="zero active">0x0000 0000</td><th class="s0">$s0</th><td class="s0">0x0000 0000</td></tr>
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+                <tr><th class="at">$at</th><td class="at">0x0000 0000<th class="s1">$s1</th><td class="s1">0x0000 0000</td></td></tr>
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+                <tr><th class="v0">$v0</th><td class="v0">0x0000 0000<th class="s2">$s2</th><td class="s2">0x0000 0000</td></td></tr>
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+                <tr><th class="v1">$v1</th><td class="v1">0x0000 0000<th class="s3">$s3</th><td class="s3">0x0000 0000</td></td></tr>
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+                <tr><th class="a0">$a0</th><td class="a0">0x0000 0000<th class="s4">$s4</th><td class="s4">0x0000 0000</td></td></tr>
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+                <tr><th class="a1">$a1</th><td class="a1">0x0000 0000<th class="s5">$s5</th><td class="s5">0x0000 0000</td></td></tr>
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+                <tr><th class="a2">$a2</th><td class="a2">0x0000 0000<th class="s6">$s6</th><td class="s6">0x0000 0000</td></td></tr>
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+                <tr><th class="a3">$a3</th><td class="a3">0x0000 0000<th class="s7">$s7</th><td class="s7">0x0000 0000</td></td></tr>
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+                <tr><th class="t0">$t0</th><td class="t0">0x0000 0000<th class="t8">$t8</th><td class="t8">0x0000 0000</td></td></tr>
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+                <tr><th class="t1">$t1</th><td class="t1">0x0000 0000<th class="t9">$t9</th><td class="t9">0x0000 0000</td></td></tr>
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+                <tr><th class="t2">$t2</th><td class="t2">0x0000 0000<th class="k0">$k0</th><td class="k0">0x0000 0000</td></td></tr>
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+                <tr><th class="t3">$t3</th><td class="t3">0x0000 0000<th class="k1">$k1</th><td class="k1">0x0000 0000</td></td></tr>
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+                <tr><th class="t4">$t4</th><td class="t4">0x0000 0000<th class="gp">$gp</th><td class="gp">0x0000 0000</td></td></tr>
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+                <tr><th class="t5">$t5</th><td class="t5">0x0000 0000<th class="sp">$sp</th><td class="sp">0x0000 0000</td></td></tr>
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+                <tr><th class="t6">$t6</th><td class="t6">0x0000 0000<th class="s8">$s8</th><td class="s8">0x0000 0000</td></td></tr>
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+                <tr><th class="t7">$t7</th><td class="t7">0x0000 0000<th class="ra">$ra</th><td class="ra">0x0000 0000</td></td></tr>
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+              </tbody>
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+            </table>
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+          </div>
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+        </div>
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+      </div>
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+    </div>
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+    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
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+    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
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+    <script src="index.js"></script>
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+  </body>
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+</html>

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index.js
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+// Will eventually be replaced with a bundle consisting of the 'js' folder

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js/assembler.js
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+// --- START DEBUG ONLY CODE ---
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+const fs = require('fs')
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+const input = fs.readFileSync('test.asm', { encoding: 'utf-8' })
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+// --- END DEBUG ONLY CODE ---
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+
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+const encoders = require('./encoders.js')
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+const lines = raw => raw.split('\n').map(s => s.trim()).filter(s => !!s)
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+
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+const parse = lineArray => lineArray.map(line => {
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+  return {
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+    instruction: line.substr(0, line.indexOf(' ')),
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+    arguments: line.substr(line.indexOf(' ')+1).split(',').map(s => s.trim())
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+  }
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+}).map(line => encoders[line.instruction].apply(null, line.arguments))
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+
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+console.log(parse(lines(input)))

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js/encoders.js
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+const utils = require('./utils.js')
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+
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+const regmap = [
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+  'zero', 'at', 'v0', 'v1', 'a0', 'a1', 'a2', 't0', 't1', 't2', 't3', 't4', 't5',
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+  't6', 't7', 's0', 's1', 's2', 's3', 's4', 's5', 's6', 's7', 't8', 't9', 'k0',
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+  'k1', 'gp', 'sp', 's8', 'ra' ]
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+
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+const getReg = (id) => {
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+  if (id.startsWith('$')) {
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+    id = id.slice(1)
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+  }
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+  if ((isNaN(id) === false && +id >= 0 && +id <= 31) || (id = regmap.indexOf(id)) > -1) {
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+    return id
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+  } else {
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+    utils.error("Invalid register: " + id)
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+  }
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+}
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+
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+const encoders = {
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+  'LUI': (rt, immediate) => {
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+    let encoded = '001111'
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+    encoded = encoded + '0'.repeat(5)
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+    encoded = encoded + utils.dec2binu(getReg(rt))
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+    encoded = encoded + utils.hex2bin(immediate, 16)
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+    return '0x' + utils.bin2hex(encoded, 8)
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+  }
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+}
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+
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+module.exports = encoders

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js/test.asm
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+LUI $s8, 0x2000
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+

+ 35 - 0
js/utils.js
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+const error = (error) => console.error(error)
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+
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+const dec2binu = (dec, length) => {
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+  let unsigned = Math.abs(dec)
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+  let bin = unsigned.toString(2)
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+  if (bin.length >= length) {
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+    return bin
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+  } else {
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+    return '0'.repeat(length - bin.length).concat(bin)
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+  }
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+}
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+
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+const hex2bin = (hex, length) => {
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+  if (hex.startsWith('0x')) {
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+    return dec2binu(parseInt(hex.slice(2), 16), length)
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+  } else {
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+    console.error("Hex immediates must start with 0x")
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+  }
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+}
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+
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+const bin2hex = (bin, length) => {
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+  let hex = parseInt(bin, 2).toString(16)
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+  if (hex.length >= length) {
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+    return hex
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+  } else {
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+    return '0'.repeat(length - hex.length).concat(hex)
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+  }
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+}
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+
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+module.exports = {
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+  'error': error,
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+  'dec2binu': dec2binu,
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+  'hex2bin': hex2bin,
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+  'bin2hex': bin2hex
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+}