import java.applet.Applet;
import java.awt.*;
import java.io.*;

public class MatrixMultiplication extends Applet
{
	private ConsoleOutputStream console = null;

	public void init() 
	{ 
		setName("Libra Matrix Multiplication Applet");
		setSize(1280, 480);		
		console = new ConsoleOutputStream(480);
		String[] args = {""};
		_main(args, console.out);
	}
	public void stop() 
	{ 
	}
	public void paint(Graphics g) 
	{  
		if (console != null)
			console.draw(g);
	}
	
	public void _main(String[] args, PrintStream out)
	{
		final int N = 2048;
		long flopCount;
		double startTime, time, gflops;

		gVar A, B, C;

	    	out.println("********************************");
    		out.println("SGEMM : matrix multiplication");
	    	out.println("********************************");
	    	out.println();out.println();

	        System.loadLibrary("jv");
        	if (libra.Init(args.length, args) != 0)
	        	return;

		libra.SetDefaultDataType(gDataType.GFLOAT32);

		/* Create two N by N matrices. */
		A = libra.ones(N);
		B = A;
		/* warm up phase of the gpu! (to get accurate timing results) */
		C = libra.matmul(A, B);C = libra.matmul(A, B);
		C = libra.matmul(A, B);C = libra.matmul(A, B); 

		startTime = libra.GetTime();

		/* Perform matrix multiplication */
		C = libra.matmul(A, B);
		
		time = libra.GetTime() - startTime;
		out.format("Total time : %g%s", time*1000, " milliseconds");out.println();

		/* Compute a performance measurement. Gigaflop / s. */
		flopCount = (2*N-1)*N*(long)N;
		gflops = flopCount / time / 1e9;
		out.format("%g%s", gflops, " GFlop/s.");out.println();
		
	        libra.Shutdown();     
	}
	
	public static void main(String[] args)
	{
	        //libra.SetCurrentBackend(gBackend.CPU_BACKEND);
        	new MatrixMultiplication()._main(args, System.out);       
	}   
}