X-Git-Url: http://svarog.pmf.uns.ac.rs/gitweb/?p=mjc2wsl.git;a=blobdiff_plain;f=src%2Fmjc2wsl.java;h=14cc9e415809c6cc591e4b4bc8e187e72d1e282e;hp=8ee7852c13a9ff67570e5db945b44caeca8fa0b9;hb=c71486b667051ba56ee13c49f887822b61572748;hpb=ec5ee9b63f3f86802c8ca1d5fee0e87ef521de98

diff --git a/src/mjc2wsl.java b/src/mjc2wsl.java
index 8ee7852..14cc9e4 100644
--- a/src/mjc2wsl.java
+++ b/src/mjc2wsl.java
@@ -28,14 +28,18 @@ import java.util.*;
  * @author Doni Pracner, http://perun.dmi.rs/pracner http://quemaster.com
  */
 public class mjc2wsl{
-	public static String versionN = "0.1.5";
+	public static String versionN = "0.1.7";
 
 	private TransMessages messages = new TransMessages();
 
 	private boolean genPauseAfterEachAddress=false, 
 		genPrintForEachAddress = false,
 		genPrintEStackOnChange = false;
+		
+	private boolean genPopPush=false;
 	
+	private boolean genInlinePrint=false;
+
 	/** Constant used for marking a regular comment from the original file */
 	public static final char C_REG = ' ';
 	/**
@@ -191,34 +195,68 @@ public class mjc2wsl{
 		StringBuilder ret = new StringBuilder(
 			"C:\" This file automatically converted from microjava bytecode\";\n"
 			+"C:\" with mjc2wsl v "+versionN+"\";\n");
-	
-		ret.append("BEGIN ");
-		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("\nBEGIN");
+		ret.append("\nVAR <\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_flag_jump := 0,");
+		ret.append("\n\tmjvm_objects := < >,");
+		ret.append("\n\tmjvm_estack := < >, mjvm_mstack := < > > :");
+
+		return ret.toString();
+	}
+
+	public String createAsciiString(){
+		StringBuilder ret = new StringBuilder("C:\"char array for ascii code conversions\";");
+		ret.append("\nascii := \"????????????????????????????????\"++\n");
+		ret.append("\" !\"++Quote++\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\";\n");
+
 		return ret.toString();
 	}
 
 	public String createStandardEnd(){
-		StringBuilder ret = new StringBuilder("SKIP\nENDVAR");
+		StringBuilder ret = new StringBuilder("SKIP\nENDVAR\n");
 		ret.append("\nWHERE\n");
 		
-		ret.append("\nPROC Print_MJ(val, format VAR)==\n");
-		ret.append(createComment("print spacing", C_SPEC));
-				
-		ret.append("\n\tIF format>1 THEN\n\t\tFOR i:=2 TO ");
-		ret.append("format STEP 1 DO PRINFLUSH(\" \") OD\n");
-		ret.append("\tFI;\n\tPRINFLUSH(val)\nEND\n");
-		
-		ret.append("\nEND\n");
-		
+		ret.append("\nFUNCT CHR(num) ==:\n");
+		ret.append("\t@List_To_String(< num >)\n");
+		ret.append("END\n");
+
+		if (!genInlinePrint) {
+				ret.append("\nPROC Print_MJ(val, format VAR)==\n");
+				ret.append(createComment("print spacing", C_SPEC));
+				ret.append("\n\tIF format>1 THEN\n\t\tFOR i:=2 TO ");
+				ret.append("format STEP 1 DO PRINFLUSH(\" \") OD\n");
+				ret.append("\tFI;\n\tPRINFLUSH(val)\nEND\n");
+
+				ret.append("\nPROC Print_MJ_CHAR(val, format VAR)==\n");
+				ret.append(createComment("print spacing", C_SPEC));
+				ret.append("\n\tIF format>1 THEN\n\t\tFOR i:=2 TO ");
+				ret.append("format STEP 1 DO PRINFLUSH(\" \") OD\n");
+				ret.append("\tFI;\n\tPRINFLUSH(CHR(val))\n");
+				ret.append("END\n");
+		}
+
+		ret.append("\nEND");
 		return ret.toString();
 	}
 
+	private String createStartVar(String... vars){
+		StringBuilder ret = new StringBuilder("VAR < ");
+		ret.append(vars[0] + " := 0");
+		for (int i=1; i<vars.length; i++)
+				ret.append(", "+ vars[i] +" := 0");
+		ret.append(" > : ");
+		
+		return ret.toString();
+	}
+	
+	private String createEndVar(){
+		return "ENDVAR;";
+	}
+	
 	private String createLocal(int i) {
 		// arrays start at 1 in WSL, so we need an offset
 		return "mjvm_locals[" + (i + 1) + "]";
@@ -257,26 +295,37 @@ public class mjc2wsl{
 	public static String createComment(String str, char type) {
 		return "C:\"" + type + str.replace("\"", "''") + "\";";
 	}
+	
+	// generalised stack operations
+	
+	private String createToStack(String stack, String var){
+		if (genPopPush)
+				return 	"PUSH("+stack+"," + var + ");";
+		else
+				return stack + " := <" + var + " > ++ " + stack +";";
+	}
 
-	//Expression stack
+	private String createFromStack(String stack, String var){
+		if (genPopPush)
+			return "POP("+ var + ", "+stack+");";
+		else
+			return var + ":= HEAD("+stack+"); "+stack+" := TAIL("+stack+");";
+	}
+//Expression stack
 	
 	private String createToEStack(int i) {
-		String res = "mjvm_estack := <" + i + " > ++ mjvm_estack;";
-		if (genPrintEStackOnChange)
-			res += "PRINT(\"eStack\",mjvm_estack);";
-		return res;
+		return createToEStack(i+"");
 	}
 
 	private String createToEStack(String i) {
-		String res = "mjvm_estack := <" + i + " > ++ mjvm_estack;";
+		String res = createToStack("mjvm_estack", i);
 		if (genPrintEStackOnChange)
 			res += "PRINT(\"eStack\",mjvm_estack);";
 		return res;
 	}
 
 	private String createFromEStack(String st) {
-		String res = st
-				+ " := HEAD(mjvm_estack); mjvm_estack := TAIL(mjvm_estack);";
+		String res = createFromStack("mjvm_estack",st);
 		if (genPrintEStackOnChange)
 			res += "PRINT(\"eStack\",mjvm_estack);";
 		return res;
@@ -300,15 +349,15 @@ public class mjc2wsl{
 	//Method stack
 
 	private String createToMStack(int i) {
-		return "mjvm_mstack := <" + i + " > ++ mjvm_mstack;";
+		return createToMStack(i+"");
 	}
 
 	private String createToMStack(String i) {
-		return "mjvm_mstack := <" + i + " > ++ mjvm_mstack;";
+		return createToStack("mjvm_mstack", i);
 	}
 
 	private String createFromMStack(String st) {
-		return st + " := HEAD(mjvm_mstack); mjvm_mstack := TAIL(mjvm_mstack);";
+		return createFromStack("mjvm_mstack", st);
 	}
 
 	private String getRelationFor(int opcode) throws Exception {
@@ -339,13 +388,12 @@ public class mjc2wsl{
 		int mainAdr = get4();
 		
 		prl(createStandardStart(numberOfWords));
-		prl("SKIP;\n ACTIONS A_S_start:\n A_S_start == CALL a" + (14 + mainAdr)
-				+ " END");
+		prl("SKIP;\n ACTIONS a" + (14 + mainAdr) + " :");
 		int op = get();
 		while (op >= 0) {
+			prl(" a" + counter + " ==");
 			if (originalInComments)
 				prl(createComment(describeOpCode(op), C_OC));
-			prl("a" + counter + " == ");
 			if (genPrintForEachAddress) {
 				prl("PRINT(\"a" + counter + "\");");
 				if (genPauseAfterEachAddress)
@@ -360,7 +408,10 @@ public class mjc2wsl{
 			case load_1:
 			case load_2:
 			case load_3: {
-				prl(createToEStack(createLocal(op - load_0)));
+				prl(createStartVar("tempa"));
+				prl("tempa :="+createLocal(op - load_0)+";");
+				prl(createToEStack("tempa"));
+				prl(createEndVar());
 				break;
 			}
 			case store: {
@@ -371,7 +422,10 @@ public class mjc2wsl{
 			case store_1:
 			case store_2:
 			case store_3: {
-				prl(createFromEStack(createLocal(op - store_0)));
+				prl(createStartVar("tempa"));
+				prl(createFromEStack("tempa"));
+				prl(createLocal(op - store_0)+" := tempa;");
+				prl(createEndVar());
 				break;
 			}
 
@@ -386,17 +440,18 @@ public class mjc2wsl{
 
 			case getfield: {
 				int f = get2();
+				prl(createStartVar("tempa"));
 				prl(createTopEStack());
 				prl(createToEStack(createObject("tempa") + "[" + (f + 1) + "]"));
+				prl(createEndVar());
 				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(createTopTwoEStack());
-				prl("VAR < tempArray := " + createObject("tempb") + " > :");
-				prl("tempArray[" + (f + 1) + "]:=tempa ENDVAR;");
+				prl(createStartVar("tempa", "tempb"));
+				prl(createTopTwoEStack());				
+				prl(createObject("tempb") + "[" + (f + 1) + "]:=tempa;");
+				prl(createEndVar());
 				break;
 			}
 
@@ -405,6 +460,11 @@ public class mjc2wsl{
 				break;
 			}
 
+			case const_m1: {
+				prl(createToEStack(-1));
+				break;
+			}
+
 			case const_0:
 			case const_1:
 			case const_2:
@@ -416,58 +476,74 @@ public class mjc2wsl{
 			}
 
 			case add: {
+				prl(createStartVar("tempa", "tempb", "tempres"));
 				prl(createTopTwoEStack());
 				prl("tempres := tempb + tempa;");
 				prl(createToEStack("tempres"));
+				prl(createEndVar());
 				break;
 			}
 			case sub: {
+				prl(createStartVar("tempa", "tempb", "tempres"));
 				prl(createTopTwoEStack());
 				prl("tempres := tempb - tempa;");
 				prl(createToEStack("tempres"));
+				prl(createEndVar());
 				break;
 			}
 			case mul: {
+				prl(createStartVar("tempa", "tempb", "tempres"));
 				prl(createTopTwoEStack());
 				prl("tempres := tempb * tempa;");
 				prl(createToEStack("tempres"));
+				prl(createEndVar());
 				break;
 			}
 			case div: {
+				prl(createStartVar("tempa", "tempb", "tempres"));
 				prl(createTopTwoEStack());
 				prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
 				prl("tempres := tempb DIV tempa;");
 				prl(createToEStack("tempres"));
+				prl(createEndVar());
 				break;
 			}
 			case rem: {
+				prl(createStartVar("tempa", "tempb", "tempres"));
 				prl(createTopTwoEStack());
 				prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
 				prl("tempres := tempb MOD tempa;");
 				prl(createToEStack("tempres"));
+				prl(createEndVar());
 				break;
 			}
 
 			case neg: {
+				prl(createStartVar("tempa"));
 				prl(createTopEStack());
 				prl(createToEStack("-tempa"));
+				prl(createEndVar());				
 				break;
 			}
 
 			case shl: {
+				prl(createStartVar("tempa", "tempb"));
 				prl(createTopTwoEStack());
 				prl("VAR <tempres :=tempb, i:=1 >:");
 				prl("\tFOR i:=1 TO tempa STEP 1 DO tempres := tempres * 2 OD;");
 				prl(createToEStack("tempres"));
 				prl("ENDVAR;");
+				prl(createEndVar());
 				break;
 			}
 			case shr: {
+				prl(createStartVar("tempa", "tempb"));
 				prl(createTopTwoEStack());
 				prl("VAR <tempres :=tempb, i:=1 >:");
 				prl("\tFOR i:=1 TO tempa STEP 1 DO tempres := tempres DIV 2 OD;");
 				prl(createToEStack("tempres"));
 				prl("ENDVAR;");
+				prl(createEndVar());
 				break;
 			}
 
@@ -488,47 +564,56 @@ public class mjc2wsl{
 			case newarray: {
 				get();// 0 - bytes, 1 - words; ignore for now
 				// TODO take into consideration 0/1
+				prl(createStartVar("tempa"));
 				prl(createTopEStack());
 				prl("mjvm_arrays := mjvm_arrays ++ < ARRAY(tempa,0) >;");
 				prl(createToEStack("LENGTH(mjvm_arrays)"));
+				prl(createEndVar());
 				break;
 			}
 
 			case aload:
 			case baload: {
+				prl(createStartVar("tempa", "tempb"));
 				prl(createTopTwoEStack());
 				prl(createToEStack(createArray("tempb") + "[tempa+1]"));
+				prl(createEndVar());
 				break;
 			}
 			case astore:
 			case bastore: {
+				prl(createStartVar("tempa", "tempb", "tempres"));
 				prl(createFromEStack("tempres"));
 				prl(createTopTwoEStack());
-				// 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 := " + createArray("tempb") + " > :");
-				prl("tempArray[tempa+1]:=tempres ENDVAR;");
+				prl("mjvm_arrays[tempb][tempa+1]:=tempres;");
+				prl(createEndVar());
 				break;
 			}
 			case arraylength: {
+				prl(createStartVar("tempa", "tempb"));
 				prl(createTopEStack());
 				prl("tempb := LENGTH("+ createArray("tempa") + ");");
 				prl(createToEStack("tempb"));
+				prl(createEndVar());
 				break;
 			}
 
 			case dup: {
+				prl(createStartVar("tempa", "tempb"));
 				prl(createTopEStack());
 				prl(createToEStack("tempa"));
 				prl(createToEStack("tempa"));
+				prl(createEndVar());
 				break;
 			}
 			case dup2: {
+				prl(createStartVar("tempa", "tempb"));
 				prl(createTopTwoEStack());
 				prl(createToEStack("tempb"));
 				prl(createToEStack("tempa"));
 				prl(createToEStack("tempb"));
 				prl(createToEStack("tempa"));
+				prl(createEndVar());
 				break;
 			}
 
@@ -548,10 +633,18 @@ public class mjc2wsl{
 			case jle:
 			case jgt:
 			case jge: {
+				prl(createStartVar("tempa", "tempb"));
 				prl(createTopTwoEStack());
-				prl("IF tempb " + getRelationFor(op) + " tempa THEN CALL a"
-						+ (counter + get2()) + " ELSE CALL a" + (counter + 1)
+				prl("IF tempb " + getRelationFor(op) 
+						+ " tempa THEN mjvm_flag_jump := 1"
+						+ " ELSE mjvm_flag_jump := 0" 
 						+ " FI;");
+				prl(createEndVar());
+				prl("IF mjvm_flag_jump = 1 THEN CALL a"
+						+ (counter + get2()) 
+						+ " ELSE CALL a" + (counter + 1)
+						+ " FI;");
+				
 				break;
 			}
 
@@ -563,7 +656,7 @@ public class mjc2wsl{
 			case return_: {
 				// we let the actions return
 				// there is nothing to clean up
-				prl("SKIP END b" + counter + " ==");
+				prl("SKIP\n END\n b" + counter + " ==");
 				break;
 			}
 			case enter: {
@@ -588,22 +681,37 @@ public class mjc2wsl{
 				prl(createComment("char is read like a number", C_SPEC));
 			}
 			case read: {
+				prl(createStartVar("tempa"));
 				prl("tempa := @String_To_Num(@Read_Line(Standard_Input_Port));");
 				prl(createToEStack("tempa"));
+				prl(createEndVar());
 				break;
 			}
 
 			// the prints
 			case bprint: {
-				// TODO need to make it a char on print
-				messages.message("chars will be printed as number codes", TransMessages.M_WAR);
-				prl(createComment("char will be printed as a number code",
-						C_SPEC));
+				prl(createStartVar("tempa", "tempb"));
+				prl(createTopTwoEStack());
+				if (genInlinePrint){
+					prl(createComment("print spacing and transformation",C_SPEC));
+					prl("PRINFLUSH(SUBSTR(\"          \", 0, MIN(10, MAX(0,tempa-1))), @List_To_String(< tempb >));");
+				} else
+					prl("Print_MJ_CHAR(tempb,tempa);");
+				prl(createEndVar());
+				break;
 			}
 			case print: {
 				// TODO printing numbers needs different lengths of spacing
+				prl(createStartVar("tempa", "tempb"));
+
 				prl(createTopTwoEStack());
-				prl("Print_MJ(tempb,tempa);");
+				if (genInlinePrint){
+					prl(createComment("print spacing",C_SPEC));
+					prl("PRINFLUSH(SUBSTR(\"          \", 0, MIN(10, MAX(0, tempa-1))), tempb);");
+				}
+				else
+					prl("Print_MJ(tempb,tempa);");
+				prl(createEndVar());
 				break;
 			}
 
@@ -622,12 +730,12 @@ public class mjc2wsl{
 			op = get();
 			if (op >= 0)
 				if (wasJump)
-					prl("SKIP END");
+					prl("SKIP\n END");
 				else
-					prl("CALL a" + counter + " END");
+					prl("CALL a" + counter + "\n END");
 		}
-		prl("\nSKIP END\nENDACTIONS;\n");
-		prl(createStandardEnd());
+		prl("SKIP\n END\nENDACTIONS;\n");
+		pr(createStandardEnd());
 	}
 
 	public void convertFile(File f) {
@@ -651,6 +759,8 @@ public class mjc2wsl{
 		System.out.println();
 		printHelpOutput();
 		System.out.println();
+		printHelpDirectives();
+		System.out.println();
 		printHelpGenerating();
 		System.out.println();
 		printHelpHelp();
@@ -674,6 +784,15 @@ public class mjc2wsl{
 		System.out.println("  --genAll   short for applying all code generation");
 	}
 
+	public void printHelpDirectives(){
+		System.out.println("Alternatives for code generation:");
+		System.out.println("  --genPopPush generate POP/PUSH instead of TAIL/HEAD");
+		System.out.println("  --genHeadTail generate TAIL/HEAD instead of POP/PUSH ");
+		System.out.println();
+		System.out.println("  --genInlinePrint generate prints directly instead of procedure calls");
+		System.out.println("  --genProcedurePrint generate prints as custom procedure calls");
+	}
+
 	public void printHelpHelp() {
 		System.out.println("Help and info options");
 		System.out.println("  -h basic help");
@@ -742,6 +861,14 @@ public class mjc2wsl{
 					genPrintEStackOnChange = true;
 					genPrintForEachAddress = true;
 					genPauseAfterEachAddress = true;
+				} else if (args[i].compareToIgnoreCase("--genPopPush") == 0) {
+					genPopPush = true;
+				} else if (args[i].compareToIgnoreCase("--genInlinePrint") == 0) {
+					genInlinePrint = true;
+				} else if (args[i].compareToIgnoreCase("--genHeadTail") == 0) {
+					genPopPush = false;
+				} else if (args[i].compareToIgnoreCase("--genProcedurePrint") == 0) {
+					genInlinePrint = false;
 				}
 				i++;
 			}