int start = tramp.size();
tramp.add(ALOAD_0);
tramp.add(GETFIELD,new FieldRef(me,"state",Type.INT));
- int stateCheck = tramp.add(IFNE);
+ tramp.add(IFEQ,tramp.size()+2);
+ tramp.add(RETURN);
tramp.add(ALOAD_0);
tramp.add(ALOAD_0);
tramp.add(INVOKEVIRTUAL,new MethodRef(Type.STRINGBUFFER,"toString",Type.STRING,Type.NO_ARGS));
tramp.add(INVOKESPECIAL,new MethodRef(new Type.Object("org.ibex.nestedvm.Runtime$ExecutionException"),"<init>",Type.VOID,new Type[]{Type.STRING}));
tramp.add(ATHROW);
-
- tramp.setArg(stateCheck,tramp.size());
- tramp.add(RETURN);
try {
tramp.finish();
private void leaveMethod() {
mg.add(GOTO,returnTarget);
}
+
+ private void link(int mypc) {
+ preSetReg(R+RA);
+ if(lessConstants){
+ int ref = (mypc+8 + 32768) & ~65535;
+ int diff = (mypc+8) - ref;
+ if(diff < -32768 || diff > 32767) throw new Error("should never happen " + diff);
+ mg.add(LDC,ref);
+ mg.add(LDC,diff);
+ mg.add(IADD);
+ } else {
+ mg.add(LDC,mypc+8);
+ }
+ setReg();
+ }
private void branch(int pc, int target) {
if((pc&methodMask) == (target&methodMask)) {
case 9: // JALR
if(pc == -1) throw new Exn("pc modifying insn in delay slot");
emitInstruction(-1,nextInsn,-1);
+ link(pc);
preSetPC();
pushRegWZ(R+rs);
setPC();
-
- preSetReg(R+RA);
- mg.add(LDC,pc+8);
- setReg();
leaveMethod();
unreachable = true;
break;
pushRegWZ(R+rs);
b1 = mg.add(IFGE);
emitInstruction(-1,nextInsn,-1);
- preSetReg(R+RA);
- mg.add(LDC,pc+8);
- setReg();
+ link(pc);
branch(pc,pc+branchTarget*4+4);
mg.setArg(b1,mg.size());
break;
b1 = mg.add(IFLT);
}
emitInstruction(-1,nextInsn,-1);
- preSetReg(R+RA);
- mg.add(LDC,pc+8);
- setReg();
+ link(pc);
branch(pc,pc+branchTarget*4+4);
if(b1 != -1) mg.setArg(b1,mg.size());
if(b1 == -1) unreachable = true;
if(pc == -1) throw new Exn("pc modifying insn in delay slot");
int target = (pc&0xf0000000)|(jumpTarget << 2);
emitInstruction(-1,nextInsn,-1);
- preSetReg(R+RA);
- mg.add(LDC,pc+8);
- setReg();
+ link(pc);
branch(pc, target);
unreachable = true;
break;