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/*
* Copyright (C) 2010 Google Inc.
*
* 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.
*/
package benchmarks.regression;
import com.google.caliper.Param;
import com.google.caliper.Runner;
import com.google.caliper.SimpleBenchmark;
public class IntConstantDivisionBenchmark extends SimpleBenchmark {
public int timeDivideIntByConstant2(int reps) {
int result = 1;
for (int i = 0; i < reps; ++i) {
result /= 2;
}
return result;
}
public int timeDivideIntByConstant8(int reps) {
int result = 1;
for (int i = 0; i < reps; ++i) {
result /= 8;
}
return result;
}
public int timeDivideIntByConstant10(int reps) {
int result = 1;
for (int i = 0; i < reps; ++i) {
result /= 10;
}
return result;
}
public int timeDivideIntByConstant100(int reps) {
int result = 1;
for (int i = 0; i < reps; ++i) {
result /= 100;
}
return result;
}
public int timeDivideIntByConstant100_HandOptimized(int reps) {
int result = 1;
for (int i = 0; i < reps; ++i) {
result = (int) ((0x51eb851fL * result) >>> 37);
}
return result;
}
public int timeDivideIntByConstant2048(int reps) {
int result = 1;
for (int i = 0; i < reps; ++i) {
result /= 2048;
}
return result;
}
public int timeDivideIntByVariable2(int reps) {
int result = 1;
int factor = 2;
for (int i = 0; i < reps; ++i) {
result /= factor;
}
return result;
}
public int timeDivideIntByVariable10(int reps) {
int result = 1;
int factor = 10;
for (int i = 0; i < reps; ++i) {
result /= factor;
}
return result;
}
}
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