clarify licensing

[nestedvm.git] / src / org / ibex / nestedvm / JavaSourceCompiler.java

diff --git a/src/org/ibex/nestedvm/JavaSourceCompiler.java b/src/org/ibex/nestedvm/JavaSourceCompiler.java
index 887e232..d231f94 100644 (file)
--- a/src/org/ibex/nestedvm/JavaSourceCompiler.java
+++ b/src/org/ibex/nestedvm/JavaSourceCompiler.java
@@ -1,3 +1,7 @@
+// Copyright 2000-2005 the Contributors, as shown in the revision logs.
+// Licensed under the Apache License 2.0 ("the License").
+// You may not use this file except in compliance with the License.
+

 package org.ibex.nestedvm;
 
 import java.util.*;
 package org.ibex.nestedvm;
 
 import java.util.*;

@@ -33,6 +37,7 @@ public class JavaSourceCompiler extends Compiler {
     }
     
     protected void _go() throws Exn, IOException {
     }
     
     protected void _go() throws Exn, IOException {

+        if(singleFloat) throw new Exn("JavaSourceCompiler doesn't support singleFloat");

         String packageName;
         String className;
         if (fullClassName.indexOf('.') != -1) {
         String packageName;
         String className;
         if (fullClassName.indexOf('.') != -1) {

@@ -217,7 +222,7 @@ public class JavaSourceCompiler extends Compiler {
     private void endMethod() { endMethod(endOfMethod); }
     private void endMethod(int lastAddr) {
         if(startOfMethod == 0) return;
     private void endMethod() { endMethod(endOfMethod); }
     private void endMethod(int lastAddr) {
         if(startOfMethod == 0) return;

-        // FEATURE: We should be able to use if(!unreachable) here (i think)
+        // We should be able to use if(!unreachable) here (i think)

         // This isn't strictly necessary; its just here to work around unreachable code errors
         p("case " + toHex(lastAddr) + ":");
         indent++;
         // This isn't strictly necessary; its just here to work around unreachable code errors
         p("case " + toHex(lastAddr) + ":");
         indent++;

@@ -285,7 +290,7 @@ public class JavaSourceCompiler extends Compiler {
             insn = nextInsn;
             nextInsn = (i == count-1) ? -1 : dis.readInt();
             if(addr >= endOfMethod) { endMethod(); startMethod(addr); }
             insn = nextInsn;
             nextInsn = (i == count-1) ? -1 : dis.readInt();
             if(addr >= endOfMethod) { endMethod(); startMethod(addr); }

-            if(jumpableAddresses==null || addr == startOfMethod || jumpableAddresses.contains(new Integer(addr))) {
+            if(jumpableAddresses==null || addr == startOfMethod || jumpableAddresses.get(new Integer(addr)) != null) {

                 p("case " + toHex(addr) + ":");
                 unreachable = false;
             } else if(unreachable) {
                 p("case " + toHex(addr) + ":");
                 unreachable = false;
             } else if(unreachable) {

@@ -412,7 +417,7 @@ public class JavaSourceCompiler extends Compiler {
                         break;
                     case 12: // SYSCALL
                         p("pc = " + toHex(pc) + ";");
                         break;
                     case 12: // SYSCALL
                         p("pc = " + toHex(pc) + ";");

-                        p( "r"+V0+" = syscall(r"+V0+",r"+A0+",r"+A1+",r"+A2+",r"+A3+");");
+                        p( "r"+V0+" = syscall(r"+V0+",r"+A0+",r"+A1+",r"+A2+",r"+A3+",r"+T0+",r"+T1+");");

                         p("if (state != RUNNING) {");
                             indent++;
                             p("pc = " + toHex(pc+4) + ";");
                         p("if (state != RUNNING) {");
                             indent++;
                             p("pc = " + toHex(pc+4) + ";");

@@ -422,6 +427,7 @@ public class JavaSourceCompiler extends Compiler {
                         break;
                     case 13: // BREAK
                         p( "throw new ExecutionException(\"Break\");");
                         break;
                     case 13: // BREAK
                         p( "throw new ExecutionException(\"Break\");");

+                        unreachable = true;

                         break;
                     case 16: // MFHI
                         p( "r"+rd+" = hi;");
                         break;
                     case 16: // MFHI
                         p( "r"+rd+" = hi;");

@@ -549,17 +555,8 @@ public class JavaSourceCompiler extends Compiler {
                 if(pc == -1) throw new Error("pc modifying insn in delay slot");
                 int target = (pc&0xf0000000)|(jumpTarget << 2);
                 emitInstruction(-1,nextInsn,-1);
                 if(pc == -1) throw new Error("pc modifying insn in delay slot");
                 int target = (pc&0xf0000000)|(jumpTarget << 2);
                 emitInstruction(-1,nextInsn,-1);

-                if(optimizedMemcpy && (target == memcpy || target == memset)) {
-                    if(target == memcpy)
-                        p("memcpy(r4,r5,r6);");
-                    else if(target == memset)
-                        p("memset(r4,r5,r6);");
-                    p("r2 = r4;");
-                    branch(pc,pc+8);
-                } else {
-                    p("r" + RA + "=" + constant(pc+8 /*skip this insn and delay slot*/) + ";");
-                    branch(pc, target);
-                }
+                p("r" + RA + "=" + constant(pc+8 /*skip this insn and delay slot*/) + ";");
+                branch(pc, target);

                 unreachable = true;
                 break;
             }
                 unreachable = true;
                 break;
             }

@@ -609,7 +606,7 @@ public class JavaSourceCompiler extends Compiler {
                 p( "r"+rt+" = r"+rs+" < "+signedImmediate+" ? 1 : 0;");
                 break;
             case 11: // SLTIU
                 p( "r"+rt+" = r"+rs+" < "+signedImmediate+" ? 1 : 0;");
                 break;
             case 11: // SLTIU

-                p( "r"+rt+" = (r"+rs+"&0xffffffffL) < ("+unsignedImmediate+"&0xffffffffL) ? 1 : 0;");
+                p( "r"+rt+" = (r"+rs+"&0xffffffffL) < ("+signedImmediate+"&0xffffffffL) ? 1 : 0;");

                 break;
             case 12: // ANDI
                 p( "r"+rt+" = r"+rs+" & "+unsignedImmediate+";");
                 break;
             case 12: // ANDI
                 p( "r"+rt+" = r"+rs+" & "+unsignedImmediate+";");

@@ -928,4 +925,4 @@ public class JavaSourceCompiler extends Compiler {
             "f"+(r+1)+" = (int)(l >>> 32); f"+r+" = (int)l; }";
     }
 }
             "f"+(r+1)+" = (int)(l >>> 32); f"+r+" = (int)l; }";
     }
 }

-    
\ No newline at end of file
+