trying optimize 2mm

polybench-c-4.2.1-beta/linear-algebra/kernels/2mm/2mm_optimized.c

@@ -91,17 +91,17 @@ void kernel_2mm(int ni, int nj, int nk, int nl,
 	    tmp[i][j] = SCALAR_VAL(0.0);
 
   for (i = 0; i < _PB_NI; i++)
-    for (j = 0; j < _PB_NJ; j++)
-	    for (k = 0; k < _PB_NK; ++k)
+    for (k = 0; k < _PB_NK; ++k)
+      for (j = 0; j < _PB_NJ; j++)
 	      tmp[i][j] += alpha * A[i][k] * B[k][j];
 
   for (i = 0; i < _PB_NI; i++)
     for (j = 0; j < _PB_NL; j++)
 	    D[i][j] *= beta;
-      
+
   for (i = 0; i < _PB_NI; i++)
-    for (j = 0; j < _PB_NL; j++)
-	    for (k = 0; k < _PB_NJ; ++k)
+    for (k = 0; k < _PB_NJ; ++k)
+      for (j = 0; j < _PB_NL; j++)
 	      D[i][j] += tmp[i][k] * C[k][j];
 #pragma endscop