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diff --git a/src/mjc2wsl.java b/src/mjc2wsl.java
--- a/src/mjc2wsl.java
+++ b/src/mjc2wsl.java
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 > :");
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.
*/
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");
}
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) {
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()));
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;
+ }
+ //TODO shl, shr
+
+ 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()) + ";");
}
case return_: {
- prl("IF EMPTY?(mjvm_mstack) THEN CALL Z FI");
- //else we let things return
- prl("END b"+counter+" ==");
+ //we let the actions return
+ // there is nothing to clean up
+ prl("SKIP END b"+counter+" ==");
break;
}
case enter: {
}
// read, print
- 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 bread: {
+ case read: {
prl("tempa := @String_To_Num(@Read_Line(Standard_Input_Port));");
prl(cmdToEStack("tempa"));
break;
}
// the prints
- 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 bprint: {
+ case print: {
// TODO printing numbers needs different lengths of spacing
prl(getTopTwo());
pr(createComment("print spacing",C_SPEC));