71 lines
1.8 KiB
C#
71 lines
1.8 KiB
C#
using System.Runtime.Intrinsics.X86;
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using BenchmarkDotNet.Attributes;
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namespace Content.Benchmarks
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{
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public class StereoToMonoBenchmark
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{
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[Params(128, 256, 512)]
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public int N { get; set; }
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private short[] _input;
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private short[] _output;
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[GlobalSetup]
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public void Setup()
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{
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_input = new short[N * 2];
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_output = new short[N];
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}
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[Benchmark]
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public void BenchSimple()
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{
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var l = N;
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for (var j = 0; j < l; j++)
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{
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var k = j + l;
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_output[j] = (short) ((_input[k] + _input[j]) / 2);
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}
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}
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[Benchmark]
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public unsafe void BenchSse()
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{
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var l = N;
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fixed (short* iPtr = _input)
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fixed (short* oPtr = _output)
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{
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for (var j = 0; j < l; j += 8)
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{
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var k = j + l;
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var jV = Sse2.ShiftRightArithmetic(Sse2.LoadVector128(iPtr + j), 1);
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var kV = Sse2.ShiftRightArithmetic(Sse2.LoadVector128(iPtr + k), 1);
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Sse2.Store(j + oPtr, Sse2.Add(jV, kV));
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}
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}
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}
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[Benchmark]
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public unsafe void BenchAvx2()
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{
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var l = N;
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fixed (short* iPtr = _input)
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fixed (short* oPtr = _output)
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{
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for (var j = 0; j < l; j += 16)
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{
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var k = j + l;
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var jV = Avx2.ShiftRightArithmetic(Avx.LoadVector256(iPtr + j), 1);
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var kV = Avx2.ShiftRightArithmetic(Avx.LoadVector256(iPtr + k), 1);
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Avx.Store(j + oPtr, Avx2.Add(jV, kV));
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}
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}
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}
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}
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}
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