50 lines
1.3 KiB
C#
50 lines
1.3 KiB
C#
using System.Runtime.Intrinsics;
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using System.Runtime.Intrinsics.X86;
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using BenchmarkDotNet.Attributes;
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using BenchmarkDotNet.Running;
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BenchmarkRunner.Run<SseBenchmarks>();
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[SimpleJob, MemoryDiagnoser(false)]
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public class SseBenchmarks
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{
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private readonly int[] _firstArray = { 1, 2, 3, 4 };
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private readonly int[] _secondArray = { 5, 6, 7, 8 };
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[Benchmark]
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public int[] ClassicLoop()
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{
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var result = new int[4];
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for (var index = 0; index < _firstArray.Length; index++)
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{
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result[index] = _firstArray[index] + _secondArray[index];
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}
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return result;
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}
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[Benchmark]
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public int[] Vectorized()
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{
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var result = new int[4];
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unsafe
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{
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fixed (int* ap = _firstArray, bp = _secondArray, rp = result)
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{
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int vectorCount = _firstArray.Length / Vector128<int>.Count;
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for (var i = 0; i < vectorCount; i++)
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{
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Vector128<int> v1 = Sse2.LoadVector128(ap + i);
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Vector128<int> v2 = Sse2.LoadVector128(bp + i);
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Vector128<int> sum = Sse2.Add(v1, v2);
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Sse2.Store(rp + i, sum);
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}
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}
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}
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return result;
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}
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}
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