实现MIPS乘法模拟代码,JS代码库,德仔网

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【JS】实现MIPS乘法模拟
作者:dezai / 发布于2014/9/11/ 486

	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
	<html xmlns="http://www.w3.org/1999/xhtml">
	<head runat="server">
	 <title>MIPS MULTIPLICATION SIMULATOR </title>

	 <script type="text/javascript">
	 /* CREATED BY SERKAN SENDUR */
	 function StringToNumberArray(Bin) {
	 var numberArray = [];
	 for (var i = 0; i < Bin.length; i++) {
	 numberArray.push(Bin.substring(i, i + 1));
	 }
	 return numberArray;
	 }

	 function ConvertToDecimal(Bin) {
	 var decimalNumber = 0;
	 var numberArray = StringToNumberArray(Bin);
	 numberArray.reverse();
	 for (var i = 0; i < numberArray.length; i++) {
	 decimalNumber += numberArray[i] * Math.pow(2, i);
	 }
	 return decimalNumber;
	 }

	 function ConvertToBinary(dec) {
	 var bits = [];
	 var dividend = dec;
	 var remainder = 0;
	 while (dividend >= 2) {
	 remainder = dividend % 2;
	 bits.push(remainder);
	 dividend = (dividend - remainder) / 2;
	 }
	 bits.push(dividend);
	 bits.reverse();
	 return bits.join("");
	 }

	 function Multiply() {
	 var firstNumber = document.getElementById("txtFirst").value;
	 var secondNumber = document.getElementById("txtSecond").value;
	 var multiplier = ConvertToBinary(firstNumber);
	 var multiplicant = ConvertToBinary(secondNumber);
	 var product = 0;
	 var step = "Initial values";
	 var iteration = 0;
	 AppendToTable(iteration, step, multiplier, multiplicant, product);
	 multiplicationAlgoritm(multiplier, multiplicant, product, 4);

	 }
	 function multiplicationAlgoritm(multiplier, multiplicant, product, counter) {
	 if (counter > 0) {
	 var iteration = 5 - counter;
	 var decProduct = ConvertToDecimal(product);
	 var decMultiplier = ConvertToDecimal(multiplier);
	 var decMultiplicant = ConvertToDecimal(multiplicant);
	 if (Right(multiplier, 1) == "1") {
	 decProduct = decProduct + decMultiplicant;
	 product = ConvertToBinary(decProduct);
	 AppendToTable(iteration, "1a", multiplier, multiplicant, product);
	 }
	 else {
	 AppendToTable(iteration, 1, multiplier, multiplicant, product);
	 }
	 decMultiplicant = ConvertToDecimal(multiplicant);
	 decMultiplicant = decMultiplicant << 1;
	 multiplicant = ConvertToBinary(decMultiplicant);
	 AppendToTable(iteration, 2, multiplier, multiplicant, product);

	 decMultiplier = ConvertToDecimal(multiplier);
	 decMultiplier = decMultiplier >> 1;
	 multiplier = ConvertToBinary(decMultiplier);
	 AppendToTable(iteration, 3, multiplier, multiplicant, product);
	 counter--;
	 multiplicationAlgoritm(multiplier, multiplicant, product, counter);
	 }

	 }
	 function AppendToTable(iteration, step, multiplier, multiplicant, product) {

	 var row = document.getElementById("tblResults").insertRow();

	 var cell = row.insertCell();
	 cell.innerText = iteration;

	 var cell = row.insertCell();
	 cell.innerText = step;

	 var cell = row.insertCell();
	 cell.innerText = multiplier;

	 var cell = row.insertCell();
	 cell.innerText = multiplicant;

	 var cell = row.insertCell();
	 cell.innerText = product;

	 }
	 function ResetTable() {

	 for (var i = document.getElementById("tblResults").rows.length; i > 1; i--) {
	 document.getElementById("tblResults").deleteRow(i - 1);
	 }
	 }
	 function Right(str, n) {
	 if (n <= 0)
	 return "";
	 else if (n > String(str).length)
	 return str;
	 else {
	 var iLen = String(str).length;
	 return String(str).substring(iLen, iLen - n);
	 }
	 }

	 </script>

	 <style type="text/css">
	 .style1
	 {
	 border-collapse: collapse;
	 border-style: solid;
	 border-width: 1px;
	 }
	 .style2
	 {
	 width: 6px;
	 }
	 .style4
	 {
	 color: #3366FF;
	 }
	 .style5
	 {
	 color: #0066FF;
	 }
	 </style>
	</head>
	<body>
	 
	 <h3 class="style4">
	 WELCOME TO MIPS MULTIPLICATION SIMULATOR</h3>
	 <hr style="color: #0033CC" />
	 <table>
	 <tr>
	 <td class="style5">
	 Multiplier :
	 </td>
	 <td>
	 <input id="txtFirst" type="text" />
	 </td>
	 </tr>
	 <tr>
	 <td class="style5">
	 Multiplicant :
	 </td>
	 <td>
	 <input id="txtSecond" type="text" />
	 </td>
	 </tr>
	 <tr>
	 <td align="center" colspan="2">
	 <input id="btnMultiply" type="button" value="Multiply" onclick="ResetTable();Multiply();"
	 style="color: #3399FF" />
	 </td>
	 </tr>
	 </table>
	 <table class="style1" cellpadding="2" cellspacing="2" id="tblResults">
	 <tr style="color: White">
	 <td bgcolor="#3366FF">
	 Iteration
	 </td>
	 <td bgcolor="#3366FF">
	 Step
	 </td>
	 <td bgcolor="#3366FF">
	 Multiplier
	 </td>
	 <td bgcolor="#3366FF" class="style2">
	 Multiplicant
	 </td>
	 <td bgcolor="#3366FF">
	 Product
	 </td>
	 </tr>
	 </table>
	</body>
	</html>
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　MIPS　　乘法模拟　
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