X-Git-Url: http://svarog.pmf.uns.ac.rs/gitweb/?p=mjc2wsl.git;a=blobdiff_plain;f=src%2Fmjc2wsl.java;h=1682978fd688923fab5f6962073fe3dc93bc377f;hp=53b2b6660a5a2b6a96c1cdba3bdd63f9af15cb6b;hb=ff725c41ec41c38d0ff51c1f315dc472ac9747d1;hpb=6a2ac6af5905b91d1e6e293b5c4176314454c789

diff --git a/src/mjc2wsl.java b/src/mjc2wsl.java
index 53b2b66..1682978 100644
--- a/src/mjc2wsl.java
+++ b/src/mjc2wsl.java
@@ -10,7 +10,7 @@ import java.util.*;
  * @author Doni Pracner, http://perun.dmi.rs/pracner http://quemaster.com
  */
 public class mjc2wsl{
-	public static String versionN = "0.1.3";
+	public static String versionN = "0.1.4";
 
 	public static final int M_ERR = 2, M_WAR = 1, M_DEB = 0;
 	
@@ -32,6 +32,10 @@ public class mjc2wsl{
 			out.println("total errors:"+messageCounters[M_ERR]+" warnings:"+messageCounters[M_WAR]);
 	}
 	
+	private boolean genPauseAfterEachAddress=false, 
+		genPrintForEachAddress = false,
+		genPrintEStackOnChange = false;
+	
 	/** Constant used for marking a regular comment from the original file */
 	public static final char C_REG = ' ';
 	/**
@@ -105,14 +109,22 @@ public class mjc2wsl{
 		trap		= 57;
 
 	public String getStandardStart(){
+			return getStandardStart(10);
+	}
+	
+	public String getStandardStart(int numWords){
 		StringBuilder ret = new StringBuilder(
 			"C:\" This file automatically converted from microjava bytecode\";\n"
 			+"C:\" with mjc2wsl v "+versionN+"\";\n");
 
-		ret.append("VAR < tempa := 0, tempb := 0, tempres :=0,\n");
-		for (int i = 0; i <= 3; i++)
-			ret.append("loc" + i + " := 0, ");
-		ret.append("\n	estack := < >, t_e_m_p := 0 > :");
+		ret.append("VAR < tempa := 0, tempb := 0, tempres :=0,\n\t");
+		ret.append("mjvm_locals := ARRAY(1,0), ");
+		ret.append("\n\tmjvm_statics := ARRAY("+numWords+",0), ");
+		ret.append("\n\tmjvm_arrays := < >, ");
+		ret.append("\n\tmjvm_objects := < >, ");
+		ret.append("\n	mjvm_estack := < >, mjvm_mstack := < >, "); 
+		ret.append("\n	mjvm_fp := 0, mjvm_sp := 0,");
+		ret.append("\n	t_e_m_p := 0 > :");
 
 		return ret.toString();
 	}
@@ -123,6 +135,38 @@ public class mjc2wsl{
 	
 	private boolean originalInComments = false;	
 	
+	private HashMap<Integer,String> opMap = null;
+	
+	private String opCodeFile = "mj-bytecodes.properties";
+	
+	private HashMap<Integer,String> getOpMap() {
+			if (opMap==null) {
+					opMap = new HashMap<Integer, String> (60, 0.98f);
+					try{
+					BufferedReader in = new BufferedReader(
+							new InputStreamReader(getClass().getResourceAsStream(opCodeFile)));
+					String str = in.readLine();
+					while (str != null) {
+							String[] ss = str.split("=");
+							opMap.put(Integer.parseInt(ss[0]),ss[1]);
+							str = in.readLine();
+					}
+					in.close();
+					}catch (Exception ex) {
+						ex.printStackTrace();
+					}
+			}
+			return opMap;
+	}
+	
+	public String getOpString(int op) {
+			return getOpMap().get(op);
+	}
+	
+	public String describeOpCode(int op) {
+			return op + " (" + getOpString(op) + ")";
+	}
+	
 	private InputStream mainIn;
 	private PrintWriter out = null;
 	private int counter = -1;
@@ -165,7 +209,24 @@ public class mjc2wsl{
 	}
 	
 	private String loc(int i){
-		return "loc" + i;
+		//arrays start at 1 in WSL, so we need an offset
+		return "mjvm_locals[" + (i+1)+"]";
+	}
+	
+	private String genStatic(int i){
+			return "mjvm_statics[" + (i+1)+"]";
+	}
+	
+	private String genArray(int i){
+			return "mjvm_arrays["+ i +"]";
+	}
+	
+	private String genArray(String i){
+			return "mjvm_arrays["+ i+"]";
+	}
+	
+	private String genObject(String i){
+			return "mjvm_objects["+ i+"]";
 	}
 	
 	/**
@@ -186,18 +247,33 @@ public class mjc2wsl{
 		return "C:\"" + type + str.replace("\"", "''") + "\";";
 	}
 
+	//Expression stack
+	
 	private String cmdToEStack(int i) {
-		return "estack := <" + i + " > ++ estack;";
+		String res = "mjvm_estack := <" + i + " > ++ mjvm_estack;";
+		if (genPrintEStackOnChange) res +="PRINT(\"eStack\",mjvm_estack);";
+		return res;
 	}
 
 	private String cmdToEStack(String i) {
-		return "estack := <" + i + " > ++ estack;";
+		String res = "mjvm_estack := <" + i + " > ++ mjvm_estack;";
+		if (genPrintEStackOnChange) res +="PRINT(\"eStack\",mjvm_estack);";
+		return res;
 	}
 
 	private String cmdFromEStack(String st) {
-		return st + " := HEAD(estack); estack := TAIL(estack);";
+		String res = st + " := HEAD(mjvm_estack); mjvm_estack := TAIL(mjvm_estack);";
+		if (genPrintEStackOnChange) res +="PRINT(\"eStack\",mjvm_estack);";
+		return res;
 	}
 	
+	private String cmdPopEStack() {
+		String res = "mjvm_estack := TAIL(mjvm_estack);";
+		if (genPrintEStackOnChange) res +="PRINT(\"eStack\",mjvm_estack);";
+		return res;
+	}
+	
+	
 	private String getTopTwo(){
 		return cmdFromEStack("tempa") + "\n" + cmdFromEStack("tempb");
 	}
@@ -206,6 +282,20 @@ public class mjc2wsl{
 		return cmdFromEStack("tempa");
 	}
 	
+	//Method stack
+	
+	private String cmdToMStack(int i) {
+		return "mjvm_mstack := <" + i + " > ++ mjvm_mstack;";
+	}
+
+	private String cmdToMStack(String i) {
+		return "mjvm_mstack := <" + i + " > ++ mjvm_mstack;";
+	}
+
+	private String cmdFromMStack(String st) {
+		return st + " := HEAD(mjvm_mstack); mjvm_mstack := TAIL(mjvm_mstack);";
+	}
+	
 	private String getRelationFor(int opcode) throws Exception {
 			switch (opcode) {
 					case jeq: return "=";
@@ -217,20 +307,34 @@ public class mjc2wsl{
 			}
 			throw new Exception("Wrong opcode for a relation");
 	}
+	
+	private boolean isJumpCode(int opcode) {
+			return (opcode>=jmp) && (opcode<=jge);
+	}
 
 	public void convertStream(InputStream ins) throws Exception{
 		mainIn = ins;
-		//skip start TODO make better
-		for (int i = 0; i < 14; i++)
-			get();
+		//process start 
+		byte m = (byte) get();
+		byte j = (byte) get();
+		if (m!='M' || j !='J') 
+				throw new Exception("Wrong start of bytecode file");
+		int codesize = get4();
+		int numberOfWords = get4();
+		int mainAdr = get4();
 		
-		prl(getStandardStart());
-		prl("SKIP;\n ACTIONS A_S_start:\n A_S_start == CALL a14 END");
+		prl(getStandardStart(numberOfWords));
+		prl("SKIP;\n ACTIONS A_S_start:\n A_S_start == CALL a"+(14+mainAdr)+" END");
 		int op = get();
 		while (op >= 0) {
 			if (originalInComments)
-				prl(createComment("" + op, C_OC));
+				prl(createComment(describeOpCode(op), C_OC));
 			prl("a" + counter + " == ");
+			if (genPrintForEachAddress) {
+					prl("PRINT(\"a"+counter+"\");");
+					if (genPauseAfterEachAddress)
+							prl("debug_disposable_string := @Read_Line(Standard_Input_Port);");
+			}
 			switch (op) {
 			case load: {
 				prl(cmdToEStack(loc(get())));
@@ -254,6 +358,32 @@ public class mjc2wsl{
 				prl(cmdFromEStack(loc(op - store_0)));
 				break;
 			}
+			
+			case getstatic:{
+				prl(cmdToEStack(genStatic(get2())));
+				break;
+			} 
+			case putstatic: {
+				prl(cmdFromEStack(genStatic(get2())));
+				break;
+			}
+
+			case getfield:{
+					int f = get2();
+					prl(getTop());
+					prl(cmdToEStack(genObject("tempa")+"["+(f+1)+"]"));
+					break;
+			}
+			case putfield:{
+					int f = get2();
+					//we need to use a temparray as a pointer, WSL
+					//otherwise tries to access it as a list of lists and fails
+					prl(getTopTwo());
+					prl("VAR < tempArray := "+genObject("tempb")+" > :");
+					prl("tempArray["+(f+1)+"]:=tempa ENDVAR;");				
+					break;
+			}
+			
 			case const_: {
 				prl(cmdToEStack(get4()));
 				break;
@@ -269,24 +399,6 @@ public class mjc2wsl{
 				break;
 			}
 
-			case jmp: {
-				prl("CALL a" + (counter + get2()) + ";");
-				break;
-			}
-
-			case jeq:
-			case jne:
-			case jlt:
-			case jle:
-			case jgt:
-			case jge: {
-				prl(getTopTwo());
-				prl("IF tempb "+ getRelationFor(op)
-						+" tempa THEN CALL a" + (counter + get2())
-						+ " FI;");
-				break;
-			}
-
 			case add: {
 				prl(getTopTwo());
 				prl("tempres := tempb + tempa;");
@@ -320,45 +432,188 @@ public class mjc2wsl{
 				break;
 			}
 
-			case enter: {
-				prl(createComment("enter not fully procesed yet"));
-				message("enter not fully procesed yet", M_WAR);
-				get();
-				get();
+			case neg :{
+				prl(getTop());
+				prl(cmdToEStack("-tempa"));
+				break;
+			}			
+
+			case shl  : {
+				prl(getTopTwo());
+				prl("VAR <tempres :=tempb, i:=1 >:");
+				prl("\tFOR i:=1 TO tempa STEP 1 DO tempres := tempres * 2 OD;");
+				prl(cmdToEStack("tempres"));
+				prl("ENDVAR;");
+				break;
+			}
+			case shr  : {
+				prl(getTopTwo());
+				prl("VAR <tempres :=tempb, i:=1 >:");
+				prl("\tFOR i:=1 TO tempa STEP 1 DO tempres := tempres DIV 2 OD;");
+				prl(cmdToEStack("tempres"));
+				prl("ENDVAR;");
+				break;
+			}
+
+			case inc  : {
+				int b1 = get(), b2 = get();
+				prl(loc(b1)+" := " +loc(b1)+" + "+b2+";");
+				break;
+			}
+
+			case new_ :{
+					int size = get2();
+					//TODO maybe objects and arrays should be in the same list?
+					prl("mjvm_objects := mjvm_objects ++ < ARRAY("+size+",0) >;");
+					prl(cmdToEStack("LENGTH(mjvm_objects)"));
+					break;
+			}
+			case newarray :{
+					get();// 0 - bytes, 1 - words; ignore for now
+					//TODO take into consideration 0/1
+					prl(getTop());
+					prl("mjvm_arrays := mjvm_arrays ++ < ARRAY(tempa,0) >;");
+					prl(cmdToEStack("LENGTH(mjvm_arrays)"));
+					break;
+			}
+			
+			case aload:
+			case baload:{
+				prl(getTopTwo());
+				prl(cmdToEStack(genArray("tempb")+"[tempa+1]"));
+				break;
+			}
+			case astore:
+			case bastore:{
+				prl(cmdFromEStack("tempres"));
+				prl(getTopTwo());
+				//we need to use a temparray as a pointer, WSL
+				//otherwise tries to access it as a list of lists and fails
+				prl("VAR < tempArray := "+genArray("tempb")+" > :");
+				prl("tempArray[tempa+1]:=tempres ENDVAR;");
+				break;
+			}
+			case arraylength :{
+				prl(getTop());
+				//TODO make an array length function of some sort!
+				prl(createComment("array length not known - LENGTH not aplicable to arrays",C_ERR));
+				message("array length not known - LENGTH not aplicable to arrays",M_ERR);
+				prl(createComment("put 1 on the stack for consistency",C_SPEC));
+				prl(cmdToEStack(1));
+				break;
+			}
+			
+			case dup : {
+					prl(getTop());
+					prl(cmdToEStack("tempa"));
+					prl(cmdToEStack("tempa"));
+					break;					
+			}
+			case dup2 : {
+					prl(getTopTwo());
+					prl(cmdToEStack("tempb"));
+					prl(cmdToEStack("tempa"));
+					prl(cmdToEStack("tempb"));
+					prl(cmdToEStack("tempa"));
+					break;					
+			}
+			
+			case pop : {
+					prl(cmdPopEStack());
+					break;					
+			}
+			
+			case jmp: {
+				prl("CALL a" + (counter + get2()) + ";");
+				break;
+			}
+
+			case jeq:
+			case jne:
+			case jlt:
+			case jle:
+			case jgt:
+			case jge: {
+				prl(getTopTwo());
+				prl("IF tempb "+ getRelationFor(op)
+						+" tempa THEN CALL a" + (counter + get2())
+						+" ELSE CALL a" + (counter+1)
+						+ " FI;");
+				break;
+			}
+
+			case call: {
+				prl("CALL a" + (counter + get2()) + ";");
 				break;
 			}
+
 			case return_: {
-				prl(createComment("return not fully procesed yet"));
-				message("return not fully procesed yet", M_WAR);
+				//we let the actions return
+				// there is nothing to clean up
+				prl("SKIP END b"+counter+" ==");
+				break;
+			}
+			case enter: {
+				int parameters = get();
+				
+				int locals = get();
+				prl(cmdToMStack("mjvm_locals"));
+				prl("mjvm_locals := ARRAY("+locals+",0);");
+				for (int i = parameters-1; i >= 0; i--)
+						prl(cmdFromEStack(loc(i)));
 				break;
 			}
 			case exit: {
-				prl(createComment("exit not fully procesed yet"));
-				message("exit not fully procesed yet", M_WAR);
+				prl(cmdFromMStack("mjvm_locals"));
 				break;
 			}
 
-			// the prints
-			case bprint: {
-				prl(getTopTwo());
-				prl("PRINT(tempb);");
+			// read, print
+			case bread:{
+				//TODO make it a char for read
+				message("char is read like a number", M_WAR);
+				prl(createComment("char is read like a number",C_SPEC));
+			}
+			case read: {
+				prl("tempa := @String_To_Num(@Read_Line(Standard_Input_Port));");
+				prl(cmdToEStack("tempa"));
 				break;
 			}
+
+			// the prints
+			case bprint:{
+				// TODO need to make it a char on print
+				message("chars will be printed as number codes", M_WAR);
+				prl(createComment("char will be printed as a number code",C_SPEC));
+			}
 			case print: {
-				// TODO need to make it a char
+				// TODO printing numbers needs different lengths of spacing
 				prl(getTopTwo());
-				prl("PRINT(tempb);");
+				pr(createComment("print spacing",C_SPEC));
+				prl("IF tempa>1 THEN FOR i:=2 TO tempa STEP 1 DO PRINFLUSH(\" \") OD FI;");
+				prl("PRINFLUSH(tempb);");
 				break;
 			}
+
+			case trap: {
+				prl("ERROR(\"Runtime error: trap("+get()+")\");");
+				break;
+			}
+			
+	
 			default:
 				prl(createComment("unknown op error: " + op, C_ERR));
 				message("unknown op error: "+ op, M_ERR);
 				break;
 			}
 
+			boolean wasJump = isJumpCode(op);
 			op = get();
 			if (op >= 0)
-				prl("CALL a" + counter + " END");
+				if (wasJump)
+						prl("SKIP END");
+				else
+						prl("CALL a" + counter + " END");
 		}
 		prl("CALL Z;\nSKIP END\nENDACTIONS;\n");
 		prl(getStandardEnd());
@@ -376,7 +631,7 @@ public class mjc2wsl{
 	public void printHelp() {
 		System.out.println("MicroJava bytecode to WSL converter. v " + versionN
 				+ ", by Doni Pracner");
-		System.out.println("usage:\n\t {options} mjc2wsl  filename [outfile]");
+		System.out.println("usage:\n\t mjc2wsl {options} filename [outfile]");
 		System.out.println("options:\n\t--screen print output to screen");
 		System.out.println("\t-o --oc[+-] include original code in comments");
 		System.out.println("\t-v verbose, print warning messages");
@@ -408,16 +663,28 @@ public class mjc2wsl{
 						originalInComments = args[i].charAt(4) == '+';
 					else
 						originalInComments = true;
-				} else if (args[i].startsWith("--screen")) {
+				} else if (args[i].compareTo("--screen") == 0) {
 					out = new PrintWriter(System.out);
 				} else if (args[i].compareTo("-d") == 0) {
 					printLevel = M_DEB;//print debug info
 				} else if (args[i].compareTo("-v") == 0) {
 					printLevel = M_WAR;//print warnings
 				} else if (args[i].compareTo("-q") == 0) {
-					printLevel = M_ERR+1;//no printing
-				}
-				i++;
+					printLevel = M_ERR+1;//no printing				
+				} else if (args[i].compareToIgnoreCase("--genEStackPrint") == 0) {
+					genPrintEStackOnChange = true;
+				} else if (args[i].compareToIgnoreCase("--genAddrPause") == 0) {
+					genPauseAfterEachAddress = true;
+				} else if (args[i].compareToIgnoreCase("--genAddrPrint") == 0) {
+					genPrintForEachAddress = true;
+				} else if (args[i].compareToIgnoreCase("--genAddr") == 0) {
+					genPrintForEachAddress = true;
+					genPauseAfterEachAddress = true;
+				} else if (args[i].compareToIgnoreCase("--genAll") == 0) {
+					genPrintEStackOnChange = true;
+					genPrintForEachAddress = true;
+					genPauseAfterEachAddress = true;
+				}i++;
 			}
 
 			if (i >= args.length) {