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editor.js

@@ -1,13 +1,15 @@
 'use strict'
 let editr = ace.edit('editor');
-let arrayOfStrings=[]; //<<<-------this will contain the code line by line
+editr.setShowPrintMargin(false);
+let arrayOfStrings=[];  //<<<-------this will contain the code line by line
 let memory = []; //this is the memory which is 4kB big
 for(let i=0;i<=4096;i++){
     memory[i] = 0;
 }
 let linePointer = 0;
-let Registers ={}; //this is all the registers in the risc-v
+let Registers ={};    //this is all the registers in the risc-v
 initialiseRegisters();
+updateRegisters();
 document.querySelector('.submitButton')?.addEventListener('click',
 function(){
 
@@ -16,30 +18,47 @@ function(){
     memory =[];
     let content1  = editor.session.getLine(0);
     let i = 0; 
-    while(i < editor.session.getLength()){
+    while(i < editor.session.getLength()){  //here we are getting the total lines present in the code and saving all the lines in a array of strings
         content1 = editor.session.getLine(i)
         i++;
         arrayOfStrings.push(content1);
     }
     for(let linePointer=0;linePointer<arrayOfStrings.length;linePointer++){ //--> j changed to linePointer
-        if(arrayOfStrings[linePointer]==="")continue
-        let currIndex =linePointer
-        console.log(linePointer);
+        if(arrayOfStrings[linePointer]==="")continue //this part of the code prevents the compiling the lines with no code in it
+        else if(IsLabel(arrayOfStrings[linePointer])){ //this part of the code checks if the line is label or not if it is a label then the compiler ignores it
+            continue;
+        }
+        let currIndex =linePointer //this currIndex variable keeps track of the line that we are compiling
         let regs=returnRegisters(arrayOfStrings[currIndex]);
         let instruction = returnFunction(arrayOfStrings[currIndex]);
         if(instruction === 'j'){
             linePointer = rInstruction(instruction,returnLabel(arrayOfStrings[currIndex]));
         }
+        else if(IsBranch(instruction)){
+            let temporaryPointer = rInstruction(instruction,regs[0],regs[1],regs[2]);
+            if(temporaryPointer === "labelNotFound"){
+                console.log("labelNotFound");
+                return;
+            }
+            if(temporaryPointer ===-1) continue;
+            else{
+                linePointer = temporaryPointer;
+                continue;
+            }
+        }
         else{
         rInstruction(instruction,regs[0],regs[1],regs[2]);
         }
     }
     console.log(Registers);
-
+    updateRegisters();
 }
 )
-
-
+document.querySelector('.resetButton').addEventListener('click',function(){
+    initialiseRegisters();
+    updateRegisters();
+    location.reload();
+})
 //<<--------------------------write testing code after this---------------------->>
 
 
@@ -48,42 +67,55 @@ function(){
 
 
 // <<-----------------------------------functions-------------------------------------->>
+function updateRegisters(){
+    let regss = Object.keys(Registers);
+    document.querySelector('.s1').textContent = 0;
+    for(let temp of regss){
+        let temp1 = "."+temp;
+        document.querySelector(temp1).textContent = Registers[temp]; 
+    }
+}
 function initialiseRegisters(){
-    Registers['zero'] = 0;
-    Registers['ra'] = 0;
-    Registers['sp'] = 0;
-    Registers['gp'] =0;
-    Registers['tp'] =0;
-    Registers['t0'] =0;
-    Registers['t1'] = 0;
+
+    Registers['zero'] = 0; 
+    Registers['ra'] = 0; 
+    Registers['sp'] = 0; 
+    Registers['gp'] =0; 
+    Registers['tp'] =0; 
+    Registers['t0'] =0; 
+    Registers['t1'] = 0; 
     Registers['t2'] =0;
-    Registers['s0'] =0;
-    Registers['fp'] =0;
-    Registers['s1'] =0;
-    for(let i=0;i<8;i++){
+    Registers['s0'] =0; 
+    Registers['s1'] =0; 
+    for(let i=0;i<8;i++){ 
         let temp1 = 'a'+i;
         Registers[temp1] = 0;
     }
-    for(let i=2;i<12;i++){
+    for(let i=2;i<12;i++){ 
         let temp1 = 's'+i;
         Registers[temp1] = 0;
     }
     for(let i=3;i<7;i++){
-        let temp1 = 't'+3;
+        let temp1 = 't'+i;
         Registers[temp1] =0;
     }
 
 }
 function returnFunction(s){
     let temp = "";
+    let spaceCheck = false;
     for(let i=0;i<s.length;i++){
-        if(s.charAt(i) === "#") return;   // changed the format
-        if(s.charAt(i)!=" "){
-            temp = temp+s.charAt(i);
-        }
-        else{
-            return temp;
+        if(s.charAt(i)!=" ") spaceCheck = true; //taken care of indentations
+        if(spaceCheck){
+            if(s.charAt(i) === "#") return;   // changed the format
+            if(s.charAt(i)!=" "){
+                temp = temp+s.charAt(i);
+            }
+            else{
+                return temp;
+            }
         }
+
     }
 }
 
@@ -107,14 +139,18 @@ function returnLabel(s){
 function returnRegisters(s){
     let regs =[];
     let temp;
+    let initialSpaceCheck = false;
     for(let i=0;i<s.length;i++){
+        if(s.charAt(i)!== " ") initialSpaceCheck = true;  //taken care of indentations
+        if(initialSpaceCheck){
         if(s.charAt(i) !== " "){
             continue;
         }
         else{
             temp = i;
             break;
         }
+    }
     }    
     let temp1 ="";
     for(let i=(temp+1);i<=s.length;i++){
@@ -150,13 +186,6 @@ function rInstruction(operation, register1=null,register2=null,register3=null){
             Registers[register1] = Registers[register2] + parseInt(register3);
             break;
         case "jal":
-            let i = 0;
-            for(i=0;i<arrayOfStrings.length;i++){
-                if(arrayOfStrings[i]==(register1+":")){
-                    break;
-                }
-            }
-            //i --> length of arrayOfStrings or 
             break;
         case "lw":
             break;
@@ -173,8 +202,119 @@ function rInstruction(operation, register1=null,register2=null,register3=null){
             return i;
             break;
         case "beq":
+            if(Registers[register1] === Registers[register2]){
+                for(let i=0;i<arrayOfStrings.length;i++){
+                    if(arrayOfStrings[i] === (register3+":")){
+                        return i;
+                    }
+                }
+                return('labelNotFound');
+            }
+            return -1;
             break;
         case "bne":
+            if(Registers[register1] !== Registers[register2]){
+                for(let i=0;i<arrayOfStrings.length;i++){
+                    if(arrayOfStrings[i] === (register3+":")){
+                        return i;
+                    }
+                }
+                return('labelNotFound');
+            }
+            return -1;
             break;
+        case 'bgt':
+            if(Registers[register1] > Registers[register2]){
+                for(let i=0;i<arrayOfStrings.length;i++){
+                    // if(arrayOfStrings[i] === (register3+":")){
+                    //     return i;
+                    // }
+                    if(doesLabelExists((arrayOfStrings[i]),(register3+":"))){
+                        return i;
+                    }
+                }
+                return('labelNotFound');
+            }
+            return -1;
+            break;
+        case 'bge':
+            if(Registers[register1] >= Registers[register2]){
+                for(let i=0;i<arrayOfStrings.length;i++){
+                    if(arrayOfStrings[i] === (register3+":")){
+                        return i;
+                    }
+                }
+                return('labelNotFound');
+            }
+            return -1;
+            break;
+        case 'blt':
+            if(Registers[register1] < Registers[register2]){
+                for(let i=0;i<arrayOfStrings.length;i++){
+                    if(arrayOfStrings[i] === (register3+":")){
+                        return i;
+                    }
+                }
+                return('labelNotFound');
+            }
+            return -1;
+            break;
+        case 'ble':
+            if(Registers[register1] <= Registers[register2]){
+                for(let i=0;i<arrayOfStrings.length;i++){
+                    if(arrayOfStrings[i] === (register3+":")){
+                        return i;
+                    }
+                }
+                return('labelNotFound');
+            }
+            return -1;
+            break;
+    }
+}
+function doesLabelExists(wholeLine,label){
+    let spaceCheck = false;    
+    let temp="";
+    for(let i=0;i<wholeLine.length;i++){
+        if(wholeLine.charAt(i)!= " "){
+            spaceCheck = true;
+        }
+        if(spaceCheck){
+            temp = temp+wholeLine.charAt(i);
+        }
     }
+
+    return((temp)===(label));
+}
+function IsBranch(s){
+    if(s==='beq' || s==='bne' || s==='bgt' || s==='bge' || s==='blt' || s==='ble'){
+        return true;
+    }
+    return false;
 }
+function IsLabel(s){
+    let temp ="";
+    for(let i=0;i<s.length;i++){
+        if(s.charAt(i)!==" " && s.charAt(i) !==":"){
+            temp = temp+s.charAt(i);
+            continue;
+        }
+        if(s.charAt(i) ===":" && temp.length!==0){
+            return true;
+        }
+
+    }
+    return false;
+}
+function isEcall(s){
+    let temp ="";
+    let isSpace = false;
+    for(let i=0;i<s.length;i++){
+        if(s.charAt(i)!=" ") isSpace = true;
+        if(isSpace){
+            temp = temp+s.charAt(i);
+        }
+    }
+    if(temp==="ecall") return true;
+    return false;
+}

style.css

@@ -0,0 +1,28 @@
+body{
+    background-color: #FAEEE7;
+}
+#editor { 
+    position: absolute;
+    top: 108px;
+    right: 500px;
+    bottom: 200px;
+    left: 0px;
+    /* width: 50% */
+
+}
+
+.btn-group{
+    height:40px;
+    width:67.1%;
+}
+.registers{
+    position: absolute;
+    top: 63px;
+    left: 1020px;
+    height: 50px;
+    width:33%;
+    border:2.5px solid black;
+}
+tr{
+    background-color: #F7F7F7;
+}