import org.ibex.classgen.*;
// FEATURE: Use IINC where possible
-// FEATURE: Use BCEL to do peephole optimization
+// FEATURE: Some kind of peephole optimization
// FEATURE: Special mode to support single-precision only - regs are floats not ints
/* FEATURE: Span large binaries across several classfiles
int start = tramp.size();
tramp.add(ALOAD_0);
tramp.add(GETFIELD,new FieldRef(me,"state",Type.INT));
- tramp.add(LDC,Runtime.RUNNING);
+ int stateCheck = tramp.add(IFNE);
- int stateCheck = tramp.add(IF_ICMPNE);
tramp.add(ALOAD_0);
tramp.add(ALOAD_0);
tramp.add(GETFIELD,new FieldRef(me,"pc",Type.INT));
mg.add(LDC,pc);
setPC();
+ // FEATURE: This is actually broken, but it happens to work for our code
+ // a func could theoretically jump back to here from a future point
restoreChangedRegs();
preSetReg(R+V0);
mg.add(ALOAD_0);
mg.add(GETFIELD,new FieldRef(me,"state",Type.INT));
- // FEATURE: Set Runtime.RUNNING to 0 and just use IFEQ here
- mg.add(LDC,Runtime.RUNNING);
- b1 = mg.add(IF_ICMPEQ);
+ b1 = mg.add(IFEQ);
preSetPC();
mg.add(LDC,pc+4);
setPC();
private static final int FCSR = 66;
private static final int REG_COUNT=67;
- // FEATURE: Clean this up
private int[] regLocalMapping = new int[REG_COUNT];
private int[] regLocalReadCount = new int[REG_COUNT];
private int[] regLocalWriteCount = new int[REG_COUNT];
private int nextAvailLocal;
+ private int loadsStart;
+ private static final int MAX_LOCALS = 4;
+ private static final int LOAD_LENGTH = 3;
+
+ private boolean doLocal(int reg) {
+ return reg == R+2 || reg == R+3 || reg == R+4 || reg == R+29;
+ }
private int getLocalForReg(int reg) {
if(regLocalMapping[reg] != 0) return regLocalMapping[reg];
return regLocalMapping[reg];
}
-
- private int loadsStart;
private void fixupRegsStart() {
for(int i=0;i<REG_COUNT;i++)
regLocalMapping[i] = regLocalReadCount[i] = regLocalWriteCount[i] = 0;
}
}
- private static final int MAX_LOCALS = 4;
- private static final int LOAD_LENGTH = 3;
- private boolean doLocal(int reg) {
- return reg == R+2 || reg == R+3 || reg == R+4 || reg == R+29;
- }
-
private void restoreChangedRegs() {
for(int i=0;i<REG_COUNT;i++) {
if(regLocalWriteCount[i] > 0) {
}
private int pushRegZ(int reg) {
- if(reg == R+0) return mg.add(LDC,0);
+ if(reg == R+0) return mg.add(ICONST_0);
else return pushReg(reg);
}