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Diffstat (limited to 'src/main/java/org/linaro/benchmarks/micro/intrinsics/Intrinsics.java')
-rw-r--r-- | src/main/java/org/linaro/benchmarks/micro/intrinsics/Intrinsics.java | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/src/main/java/org/linaro/benchmarks/micro/intrinsics/Intrinsics.java b/src/main/java/org/linaro/benchmarks/micro/intrinsics/Intrinsics.java new file mode 100644 index 0000000..f43d977 --- /dev/null +++ b/src/main/java/org/linaro/benchmarks/micro/intrinsics/Intrinsics.java @@ -0,0 +1,272 @@ +/* + * Copyright (c) 2015, ARM Limited. All rights reserved. + * + * 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 org.linaro.benchmarks.micro.intrinsics; + +import java.lang.System; +import java.util.EnumMap; +import java.util.Map; +import java.util.Random; +import org.openjdk.jmh.annotations.*; +import java.util.concurrent.TimeUnit; + +@BenchmarkMode(Mode.AverageTime) +@OutputTimeUnit(TimeUnit.NANOSECONDS) +@State(Scope.Benchmark) + +public class Intrinsics { + + /* Invoke each intrinsic in question the same no. of times */ + private static final int NUM_INVOKES = 128; + + /* Random pool size. + * Use a power of two to make the modulo operations below fast. */ + private static final int NUM_RANDS = 1024; + + /* Pre-allocated pool of random integers from [0, Integer.MAX_VALUE) */ + private static final int[] rand = new int[NUM_RANDS]; + + static { + // Allocate a pool of random integers to use in benchmarks that + // want to try and force branch mispredicts without the overhead + // of calling random.nextInt in times code. Same seed every time. + Random random = new Random(42L); + for (int i = 0; i < NUM_RANDS; i++) { + rand[i] = random.nextInt(Integer.MAX_VALUE); + } + } + + /** + * NumberOfLeadingZeros. + **/ + + private static int[] resultsNumberOfLeadingZerosInteger = new int[NUM_INVOKES]; + private static int[] resultsNumberOfLeadingZerosLong = new int[NUM_INVOKES]; + private static int[] resultsNumberOfLeadingZerosIntegerRandom = new int[NUM_INVOKES]; + private static int[] resultsNumberOfLeadingZerosLongRandom = new int[NUM_INVOKES]; + + @Benchmark + public void jmhTimeNumberOfLeadingZerosInteger() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsNumberOfLeadingZerosInteger[i] = + Integer.numberOfLeadingZeros(0x80000000 >>> i); + } + } + + @Benchmark + public void jmhTimeNumberOfLeadingZerosLong() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsNumberOfLeadingZerosLong[i] = + Long.numberOfLeadingZeros(0x8000000000000000L >>> i); + } + } + + @Benchmark + public void jmhTimeNumberOfLeadingZerosIntegerRandom() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsNumberOfLeadingZerosIntegerRandom[i] = + Integer.numberOfLeadingZeros(rand[i % NUM_RANDS] >>> rand[i % NUM_RANDS]); + } + } + + @Benchmark + public void jmhTimeNumberOfLeadingZerosLongRandom() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsNumberOfLeadingZerosLongRandom[i] = + Long.numberOfLeadingZeros(1 << (rand[i % NUM_RANDS] % Long.SIZE)); + } + } + + /** + * NumberOfTrailingZeros. + **/ + + private static int[] resultsNumberOfTrailingZerosInteger = new int[NUM_INVOKES]; + private static int[] resultsNumberOfTrailingZerosLong = new int[NUM_INVOKES]; + private static int[] resultsNumberOfTrailingZerosIntegerRandom = new int[NUM_INVOKES]; + private static int[] resultsNumberOfTrailingZerosLongRandom = new int[NUM_INVOKES]; + + @Benchmark + public void jmhTimeNumberOfTrailingZerosInteger() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsNumberOfTrailingZerosInteger[i] = + Integer.numberOfTrailingZeros(0x80000000 >>> i); + } + } + + @Benchmark + public void jmhTimeNumberOfTrailingZerosLong() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsNumberOfTrailingZerosLong[i] = + Long.numberOfTrailingZeros(0x8000000000000000L >>> i); + } + } + + @Benchmark + public void jmhTimeNumberOfTrailingZerosIntegerRandom() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsNumberOfTrailingZerosIntegerRandom[i] = + Integer.numberOfTrailingZeros(rand[i % NUM_RANDS] >>> rand[i % NUM_RANDS]); + } + } + + @Benchmark + public void jmhTimeNumberOfTrailingZerosLongRandom() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsNumberOfTrailingZerosLongRandom[i] = + Long.numberOfTrailingZeros(1 << (rand[i % NUM_RANDS] % Long.SIZE)); + } + } + + /** + * BitCount. + **/ + + // both Integer and Long's bitCount() return int type. + private static int[] resultsBitCountInteger = new int[NUM_INVOKES]; + private static int[] resultsBitCountLong = new int[NUM_INVOKES]; + private static int[] resultsBitCountIntegerRandom = new int[NUM_INVOKES]; + private static int[] resultsBitCountLongRandom = new int[NUM_INVOKES]; + + @Benchmark + public void jmhTimeBitCountInteger() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsBitCountInteger[i] = Integer.bitCount(0x1234abcd); + } + } + + @Benchmark + public void jmhTimeBitCountLong() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsBitCountLong[i] = Long.bitCount(0x1234abcd1234abcdL); + } + } + + @Benchmark + public void jmhTimeBitCountIntegerRandom() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsBitCountIntegerRandom[i] = Integer.bitCount(rand[i % NUM_RANDS]); + } + } + + @Benchmark + public void jmhTimeBitCountLongRandom() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsBitCountLongRandom[i] = + Long.bitCount((long)rand[i % NUM_RANDS] << 32 + rand[i % NUM_RANDS]); + } + } + + /** + * RotateRight. + **/ + + private static int[] resultsRotateRightInteger = new int[NUM_INVOKES]; + private static int[] resultsRotateRightIntegerConstant = new int[NUM_INVOKES]; + private static long[] resultsRotateRightLong = new long[NUM_INVOKES]; + private static long[] resultsRotateRightLongConstant = new long[NUM_INVOKES]; + + @Benchmark + public void jmhTimeRotateRightInteger() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsRotateRightInteger[i] = Integer.rotateRight(0xFF0000DD, i); + } + } + + @Benchmark + public void jmhTimeRotateRightIntegerConstant() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsRotateRightIntegerConstant[i] = Integer.rotateRight(0xFF0000DD, 16); + } + } + + @Benchmark + public void jmhTimeRotateRightLong() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsRotateRightLong[i] = Long.rotateRight(0xBBAAAADDFF0000DDL, i); + } + } + + @Benchmark + public void jmhTimeRotateRightLongConstant() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsRotateRightLongConstant[i] = Long.rotateRight(0xBBAAAADDFF0000DDL, 48); + } + } + + /** + * RotateLeft. + **/ + + private static int[] resultsRotateLeftInteger = new int[NUM_INVOKES]; + private static int[] resultsRotateLeftIntegerConstant = new int[NUM_INVOKES]; + private static long[] resultsRotateLeftLong = new long[NUM_INVOKES]; + private static long[] resultsRotateLeftLongConstant = new long[NUM_INVOKES]; + + @Benchmark + public void jmhTimeRotateLeftInteger() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsRotateLeftInteger[i] = Integer.rotateLeft(0xFF0000DD, i); + } + } + + @Benchmark + public void jmhTimeRotateLeftIntegerConstant() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsRotateLeftIntegerConstant[i] = Integer.rotateLeft(0xFF0000DD, 16); + } + } + + @Benchmark + public void jmhTimeRotateLeftLong() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsRotateLeftLong[i] = Long.rotateLeft(0xBBAAAADDFF0000DDL, i); + } + } + + @Benchmark + public void jmhTimeRotateLeftLongConstant() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsRotateLeftLongConstant[i] = Long.rotateLeft(0xBBAAAADDFF0000DDL, 48); + } + } + + /** + * RotateRandom. + **/ + + private static int[] resultsRotateRandomInteger = new int[NUM_INVOKES]; + private static long[] resultsRotateRandomLong = new long[NUM_INVOKES]; + + @Benchmark + public void jmhTimeRotateRandomInteger() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsRotateRandomInteger[i] = (rand[i % NUM_RANDS] % 2 > 0) + ? Integer.rotateLeft(0xFF0000DD, rand[i % NUM_RANDS]) + : Integer.rotateRight(0xFF0000DD, rand[i % NUM_RANDS]); + } + } + + @Benchmark + public void jmhTimeRotateRandomLong() { + for (int i = 0; i < NUM_INVOKES; ++i) { + resultsRotateRandomLong[i] = (rand[i % NUM_RANDS] % 2 > 0) + ? Long.rotateLeft(0xBBAAAADDFF0000DDL, rand[i % NUM_RANDS]) + : Long.rotateRight(0xBBAAAADDFF0000DDL, rand[i % NUM_RANDS]); + } + } +} |