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/*
* Copyright 2015 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
import java.lang.reflect.Method;
public class MultiplyAdd {
public final static int ITERATIONS = 100000000;
public final static int VALUE = 500;
public static void main(String[] args) {
long start, end = 0;
MultiplyAdd test = new MultiplyAdd();
Method[] methods = test.getClass().getDeclaredMethods();
// sort methods by name
for (int i = 0; i < methods.length; i++) {
for (int j = 0; j < methods.length - i - 1; j++) {
if (methods[j].getName().compareTo(methods[j + 1].getName()) > 0) {
Method tmp = methods[j];
methods[j] = methods[j + 1];
methods[j + 1] = tmp;
}
}
}
for (int i = 0; i < methods.length; i++) {
Method m = methods[i];
if (m.getName().startsWith("time")) {
start = System.currentTimeMillis();
end = start - 1;
try {
Object o = m.invoke(test, ITERATIONS);
end = System.currentTimeMillis();
} catch (Exception e) {
System.err.println("Invoke method: " + m.toGenericString());
}
System.out.println(m.getDeclaringClass().getName() + "."
+ m.getName().substring(4) + ": " + (end - start));
}
}
}
public int timeSimpleMaddw(int iters) {
int result = 0;
for (int i = 0; i < iters; i++) {
result += i * i;
}
return result;
}
public long timeSimpleMaddx(int iters) {
long result = 0;
for (int i = 0; i < iters; i++) {
long tmp = i;
result += tmp * tmp;
}
return result;
}
public int timeSimpleMsubw(int iters) {
int result = 0;
for (int i = 0; i < iters; i++) {
result -= i * i;
}
return result;
}
public long timeSimpleMsubx(int iters) {
long result = 0;
for (int i = 0; i < iters; i++) {
long tmp = i;
result += tmp * tmp;
}
return result;
}
public int timeMaddwBack2back(int iters) {
int result = 0;
int tmp1 = 0;
int tmp2 = 0;
for (int i = 0; i < iters; i++) {
tmp1 += i * i;
tmp2 += tmp1 * tmp1;
result += tmp2 * tmp2;
}
return result;
}
public long timeMaddxBack2back(int iters) {
long result = 0;
long tmp1 = 0;
long tmp2 = 0;
for (int i = 0; i < iters; i++) {
long a = i;
tmp1 += a * a;
tmp2 += tmp1 * tmp1;
result += tmp2 * tmp2;
}
return result;
}
public int timeMaddwInterleave(int iters) {
int result = 0;
int tmp1 = 0;
int tmp2 = 0;
for (int i = 0; i < iters; i++) {
tmp1 += i * i;
tmp2 = tmp1 + tmp1;
result += tmp2 * tmp2;
}
return result;
}
public long timeMaddxInterleave(int iters) {
long result = 0;
long tmp1 = 0;
long tmp2 = 0;
for (int i = 0; i < iters; i++) {
long a = i;
tmp1 += a * a;
tmp2 += tmp1 + tmp1;
result += tmp2 * tmp2;
}
return result;
}
public long timeMixed(int iters) {
long result = 0;
long tmp = 0;
long lt = 12;
int a = 0;
for (int i = 0; i < iters; i++) {
a = (i - 2) + i * i;
a = 1 + a * a;
tmp = a;
result -= tmp * tmp;
tmp++;
result += tmp * tmp + (tmp >> 2) * tmp + (tmp >> 2) * lt;
}
return result;
}
}
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