1 /* 2 * Copyright (C) 2010 Google Inc. 3 * 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 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 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. 15 */ 16 17 package benchmarks.regression; 18 19 public class IntConstantMultiplicationBenchmark { 20 public int timeMultiplyIntByConstant6(int reps) { 21 int result = 1; 22 for (int i = 0; i < reps; ++i) { 23 result *= 6; 24 } 25 return result; 26 } 27 public int timeMultiplyIntByConstant7(int reps) { 28 int result = 1; 29 for (int i = 0; i < reps; ++i) { 30 result *= 7; 31 } 32 return result; 33 } 34 public int timeMultiplyIntByConstant8(int reps) { 35 int result = 1; 36 for (int i = 0; i < reps; ++i) { 37 result *= 8; 38 } 39 return result; 40 } 41 public int timeMultiplyIntByConstant8_Shift(int reps) { 42 int result = 1; 43 for (int i = 0; i < reps; ++i) { 44 result <<= 3; 45 } 46 return result; 47 } 48 public int timeMultiplyIntByConstant10(int reps) { 49 int result = 1; 50 for (int i = 0; i < reps; ++i) { 51 result *= 10; 52 } 53 return result; 54 } 55 public int timeMultiplyIntByConstant10_Shift(int reps) { 56 int result = 1; 57 for (int i = 0; i < reps; ++i) { 58 result = (result + (result << 2)) << 1; 59 } 60 return result; 61 } 62 public int timeMultiplyIntByConstant2047(int reps) { 63 int result = 1; 64 for (int i = 0; i < reps; ++i) { 65 result *= 2047; 66 } 67 return result; 68 } 69 public int timeMultiplyIntByConstant2048(int reps) { 70 int result = 1; 71 for (int i = 0; i < reps; ++i) { 72 result *= 2048; 73 } 74 return result; 75 } 76 public int timeMultiplyIntByConstant2049(int reps) { 77 int result = 1; 78 for (int i = 0; i < reps; ++i) { 79 result *= 2049; 80 } 81 return result; 82 } 83 public int timeMultiplyIntByVariable10(int reps) { 84 int result = 1; 85 int factor = 10; 86 for (int i = 0; i < reps; ++i) { 87 result *= factor; 88 } 89 return result; 90 } 91 public int timeMultiplyIntByVariable8(int reps) { 92 int result = 1; 93 int factor = 8; 94 for (int i = 0; i < reps; ++i) { 95 result *= factor; 96 } 97 return result; 98 } 99 } 100
