rotate.c

ssd 练习5答案

#include <stdio.h>
#include <stdlib.h>
#include "defs.h"
#include "cache.h"

/* Here is my modification */
const int m=8, n=4;
char rotate_descr[] = "Naive Row-wise Traversal of src";
void rotate(int dim, pixel *src, pixel *dst) {
	int i, j, k, l;

	for(k=0; k < dim/m; k++) 
		for(l=0; l < dim/n; l++) 
			for(i= k*m; i<(k+1)*m ; i++)
				for(j = l*n;j<(l+1)*n; j++)
			COPY(&dst[PIXEL(dim-1-j,i,dim)], &src[PIXEL(i,j,dim)]);
	return;
}


/* Add additional functions to test here */
void register_rotate_functions() {
	add_rotate_function(&rotate, rotate_descr);
	
}