X-Git-Url: http://svarog.pmf.uns.ac.rs/gitweb/?p=mjc2wsl.git;a=blobdiff_plain;f=src%2Fmjc2wsl.java;h=c269f20ef53852419341bd77ad9fd374c888d976;hp=970089e1674a9360aad8d7627b2e2c139718e0b4;hb=634914843ea9f862bb524d1aad91dffd13c27f15;hpb=34d91ce4e669ada036d2d8dfb969218465c9f7e2

diff --git a/src/mjc2wsl.java b/src/mjc2wsl.java
index 970089e..c269f20 100644
--- a/src/mjc2wsl.java
+++ b/src/mjc2wsl.java
@@ -11,15 +11,21 @@ import java.util.*;
  */
 public class mjc2wsl{
 	public static String versionN = "0.1.2";
-		
-	//regular comments from the original file
-	//OC when original code is inserted in the file, next to the translations
-	//SPEC special messages from the translator
-	//ERR error messages from the translator
-	public static final char C_REG = ' ', C_OC = '#', C_SPEC = '&', C_ERR = '!';
 
-		/** instruction code */
-		public static final int 
+	/** Constant used for marking a regular comment from the original file */
+	public static final char C_REG = ' ';
+	/**
+	 * Constant used for marking when original code is inserted in the file,
+	 * next to the translations
+	 */
+	public static final char C_OC = '#';
+	/** Constant used for marking special messages from the translator */
+	public static final char C_SPEC = '&';
+	/** Constant used for marking error messages from the translator */
+	public static final char C_ERR = '!';
+
+	/** instruction code in MicroJava bytecode. */
+	public static final int 
 		load        =  1,
 		load_0      =  2,
 		load_1      =  3,
@@ -179,8 +185,20 @@ public class mjc2wsl{
 	private String getTop() {
 		return cmdFromEStack("tempa");
 	}
+	
+	private String getRelationFor(int opcode) throws Exception {
+			switch (opcode) {
+					case jeq: return "=";
+					case jne: return "#";
+					case jlt: return "<";
+					case jle: return "<=";
+					case jgt: return ">";
+					case jge: return ">=";
+			}
+			throw new Exception("Wrong opcode for a relation");
+	}
 
-	public void convertStream(InputStream ins){
+	public void convertStream(InputStream ins) throws Exception{
 		mainIn = ins;
 		//skip start TODO make better
 		for (int i = 0; i < 14; i++)
@@ -243,7 +261,8 @@ public class mjc2wsl{
 			case jgt:
 			case jge: {
 				prl(getTopTwo());
-				prl("IF tempb >= tempa THEN CALL a" + (counter + get2())
+				prl("IF tempb "+ getRelationFor(op)
+						+" tempa THEN CALL a" + (counter + get2())
 						+ " FI;");
 				break;
 			}
@@ -254,6 +273,18 @@ public class mjc2wsl{
 				prl(cmdToEStack("tempres"));
 				break;
 			}
+			case sub: {
+				prl(getTopTwo());
+				prl("tempres := tempb - tempa;");
+				prl(cmdToEStack("tempres"));
+				break;
+			}
+			case mul: {
+				prl(getTopTwo());
+				prl("tempres := tempb * tempa;");
+				prl(cmdToEStack("tempres"));
+				break;
+			}
 			case div: {
 				prl(getTopTwo());
 				prl("tempres := tempb / tempa;");