Dear Mathias, In the example Power.java (program ...

2010-04-28T08:24:37.621-07:00

Dear Mathias,

In the example Power.java (program at the end of the comment), the compiled function x -> x^17 is obtained by means of an anonymous extension of abstract class PowerFun, as shown subsequently:

PowerFun spower17 = <| new PowerFun() {
public int power(final int x){
return `(power2(<|x|>, 17));
}
} |>.run();

Now, imagine that I need to compile a new function that do:
x,y -> x^17 + y^17
How can I build the code for this function, and do it by reusing the already compiled function spower17.power(int) ?

(I guess the anonymous class is final, but not PowerFun)

Yours,

Frédéric

---------------------------------------------------

import edu.rice.cs.mint.runtime.Code;
import edu.rice.cs.mint.runtime.SafeCode;

public class Power{
public static void main(String[] args){

System.out.println(power(2, 17));
long start = System.nanoTime();
for(int x = 0; x < 20000; x++)
power(2, 17);
long unstaged = System.nanoTime() - start;

PowerFun spower17 = <| new PowerFun() {
public int power(final int x){
return `(power2(<|x|>, 17));
}
} |>.run();

System.out.println(spower17.power(2));
start = System.nanoTime();
for(int x = 0; x < 20000; x++)
spower17.power(2);
long staged = System.nanoTime() - start;

System.out.println("Unstaged -> " + unstaged + " ms");
System.out.println("Staged -> " + staged + " ms");
}

public static int power(int x, int n){
if (n == 1)
return x;
else
return x * power(x, n-1);
}

public static separable SafeCode power2(SafeCode x, int n){
if (n == 1)
return x;
else
return <| `x * `(power2(x, n-1)) |>;
}

public static abstract class PowerFun{
public abstract int power(int x);
}
}

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Dear Mathias, In the example Power.java (program ...