2 * Copyright (c) 2008, 2009, 2010 Nicira Networks.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
27 enum { N_ROUNDS = 10000 };
28 unsigned long long int total;
36 memset(hist2, 0, sizeof hist2);
37 memset(hist16, 0, sizeof hist16);
38 for (i = 0; i < N_ROUNDS; i++) {
46 for (j = 0; j < 32; j++) {
52 for (j = 0; j < 8; j++) {
53 hist16[j][(x >> (j * 4)) & 15]++;
57 printf("average=%08llx\n", total / N_ROUNDS);
59 printf("\nbit 0 1\n");
60 for (i = 0; i < 32; i++) {
61 printf("%3d %5d %5d\n", i, N_ROUNDS - hist2[i], hist2[i]);
63 printf("(expected values are %d)\n", N_ROUNDS / 2);
65 printf("\nnibble 0 1 2 3 4 5 6 7 8 9 10 11 12 "
67 for (i = 0; i < 8; i++) {
71 for (j = 0; j < 16; j++) {
72 printf(" %3d", hist16[i][j]);
76 printf("(expected values are %d)\n", N_ROUNDS / 16);