/*
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* Copyright (C) 2010 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package benchmarks.regression;
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public class IntConstantDivisionBenchmark {
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public int timeDivideIntByConstant2(int reps) {
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int result = 1;
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for (int i = 0; i < reps; ++i) {
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result /= 2;
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}
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return result;
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}
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public int timeDivideIntByConstant8(int reps) {
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int result = 1;
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for (int i = 0; i < reps; ++i) {
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result /= 8;
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}
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return result;
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}
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public int timeDivideIntByConstant10(int reps) {
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int result = 1;
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for (int i = 0; i < reps; ++i) {
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result /= 10;
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}
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return result;
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}
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public int timeDivideIntByConstant100(int reps) {
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int result = 1;
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for (int i = 0; i < reps; ++i) {
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result /= 100;
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}
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return result;
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}
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public int timeDivideIntByConstant100_HandOptimized(int reps) {
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int result = 1;
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for (int i = 0; i < reps; ++i) {
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result = (int) ((0x51eb851fL * result) >>> 37);
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}
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return result;
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}
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public int timeDivideIntByConstant2048(int reps) {
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int result = 1;
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for (int i = 0; i < reps; ++i) {
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result /= 2048;
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}
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return result;
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}
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public int timeDivideIntByVariable2(int reps) {
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int result = 1;
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int factor = 2;
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for (int i = 0; i < reps; ++i) {
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result /= factor;
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}
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return result;
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}
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public int timeDivideIntByVariable10(int reps) {
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int result = 1;
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int factor = 10;
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for (int i = 0; i < reps; ++i) {
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result /= factor;
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}
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return result;
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}
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}
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