X-Git-Url: http://svarog.pmf.uns.ac.rs/gitweb/?p=mjc2wsl.git;a=blobdiff_plain;f=src%2Fmjc2wsl.java;h=1682978fd688923fab5f6962073fe3dc93bc377f;hp=05a8a32fab2ee297acf28a8f17d53d57c682886d;hb=ff725c41ec41c38d0ff51c1f315dc472ac9747d1;hpb=349aa12e360d3b0f056f20b7b1207e24d3aea2a4

diff --git a/src/mjc2wsl.java b/src/mjc2wsl.java
index 05a8a32..1682978 100644
--- a/src/mjc2wsl.java
+++ b/src/mjc2wsl.java
@@ -109,12 +109,19 @@ 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\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 > :");
@@ -206,6 +213,22 @@ public class mjc2wsl{
 		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+"]";
+	}
+	
 	/**
 	 * Creates a WSL comment with care to quote chars.
 	 */
@@ -244,6 +267,13 @@ public class mjc2wsl{
 		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");
 	}
@@ -293,7 +323,7 @@ public class mjc2wsl{
 		int numberOfWords = get4();
 		int mainAdr = get4();
 		
-		prl(getStandardStart());
+		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) {
@@ -329,8 +359,30 @@ public class mjc2wsl{
 				break;
 			}
 			
-			//TODO getstatic, putstatic
-			//TODO getfield, putfield
+			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()));
@@ -380,11 +432,96 @@ public class mjc2wsl{
 				break;
 			}
 
-			//TODO neg, shl, shr, inc
-			//TODO new_ newarray
-			//TODO aload, asstore, baload, bastore
-			//TODO arraylength
-			//TODO pop, dup, dup2
+			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()) + ";");
@@ -406,17 +543,14 @@ public class mjc2wsl{
 			}
 
 			case call: {
-				prl(cmdToMStack(counter+2));
 				prl("CALL a" + (counter + get2()) + ";");
 				break;
 			}
 
 			case return_: {
-				prl("IF EMPTY?(mjvm_mstack) THEN CALL Z ELSE");
-				//else we let things return		
-				prl(cmdFromMStack("tempa"));
-				prl("SKIP FI");
-				prl("END b"+counter+" ==");
+				//we let the actions return
+				// there is nothing to clean up
+				prl("SKIP END b"+counter+" ==");
 				break;
 			}
 			case enter: {
@@ -435,18 +569,24 @@ public class mjc2wsl{
 			}
 
 			// read, print
-			case bread:
-			case read: {
+			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: 
-			case print: {
+			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 printing numbers needs different lengths of spacing
 				prl(getTopTwo());
 				pr(createComment("print spacing",C_SPEC));