marix.java

/*
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 */
package test.simd;

/**
 *
 * @author Cujo
 */
public class marix {

    public double mmult(int n) {
        double stime = System.currentTimeMillis();

        int a[][] = new int[n][n];
        int b[][] = new int[n][n];
        int c[][] = new int[n][n];
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < n; j++) {
                a[i][j] = (int) (Math.random() * 10);
                b[i][j] = (int) (Math.random() * 10);
            }
        }
        for (int i = 0; i < n; ++i) {
            for (int k = 0; k < n; ++k) {
                for (int j = 0; j < n; ++j) {
                    c[i][j] += a[i][k] * b[k][j];
                }
            }
        }

        double etime = System.currentTimeMillis();
        double out = (etime - stime) / 1000;

        return out;
    }
    public double Non_mmult(int n) {
        double stime = System.currentTimeMillis();

        int a[][] = new int[n][n];
        int b[][] = new int[n][n];
        int c[][] = new int[n][n];
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < n; j++) {
                a[i][j] = (int) (Math.random() * 10);
                b[i][j] = (int) (Math.random() * 10);
            }
        }
        for (int i = 0; i < n; ++i) {
            for (int j = 0; j < n; ++j) {
                for (int k = 0; k < n; ++k) {
                    c[i][j] += a[i][k] * b[k][j];
                }
            }
        }

        double etime = System.currentTimeMillis();
        double out = (etime - stime) / 1000;

        return out;
    }
}