78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
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// Copyright 2020 Phyronnaz
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#pragma once
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#include "CoreMinimal.h"
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#include "FastNoise/VoxelFastNoise.inl"
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class FVoxelFastNoiseTest : public FVoxelFastNoise
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{
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public:
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FORCENOINLINE v_flt SingleValue_2D_NoInline(uint8 offset, v_flt x, v_flt y) const
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{
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return SingleValue_2D(offset, x, y);
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}
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FORCENOINLINE VectorRegister SingleValue_2D_NoInline(VectorRegisterInt offset, VectorRegister x, VectorRegister y) const
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{
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return SingleValue_2D(offset, x, y);
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}
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static void Test()
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{
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FVoxelFastNoiseTest FastNoise;
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FastNoise.SetSeed(0);
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const int32 Num = 10000000;
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v_flt Results[256][4];
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for (int32 Index = 0; Index < 256; Index++)
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{
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Results[Index][0] = FastNoise.SingleValue_2D_NoInline(Index, 0.5f, 4.5f);
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Results[Index][1] = FastNoise.SingleValue_2D_NoInline(Index, 1.5f, 5.5f);
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Results[Index][2] = FastNoise.SingleValue_2D_NoInline(Index, 2.5f, 6.5f);
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Results[Index][3] = FastNoise.SingleValue_2D_NoInline(Index, 3.5f, 7.5f);
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}
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for (int32 LoopIndex = 0; LoopIndex < 10; LoopIndex++)
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{
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{
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const double StartTime = FPlatformTime::Seconds();
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for (int32 Index = 0; Index < Num; Index++)
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{
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const uint8 Byte = Index;
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v_flt Result[4];
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Result[0] = FastNoise.SingleValue_2D_NoInline(Byte, 0.5f, 4.5f);
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Result[1] = FastNoise.SingleValue_2D_NoInline(Byte, 1.5f, 5.5f);
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Result[2] = FastNoise.SingleValue_2D_NoInline(Byte, 2.5f, 6.5f);
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Result[3] = FastNoise.SingleValue_2D_NoInline(Byte, 3.5f, 7.5f);
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ensure(Result[0] == Results[Byte][0] && Result[1] == Results[Byte][1] && Result[2] == Results[Byte][2] && Result[3] == Results[Byte][3]);
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}
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const double EndTime = FPlatformTime::Seconds();
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LOG_VOXEL(Log, TEXT("no SIMD took %fs (%fns)"), EndTime - StartTime, (EndTime - StartTime) / Num * 1e9);
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}
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{
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const double StartTime = FPlatformTime::Seconds();
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for (int32 Index = 0; Index < Num; Index++)
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{
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const uint8 Byte = Index;
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const auto Offset = MakeVectorRegisterInt(Byte, Byte, Byte, Byte);
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const auto X = MakeVectorRegister(0.5f, 1.5f, 2.5f, 3.5f);
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const auto Y = MakeVectorRegister(4.5f, 5.5f, 6.5f, 7.5f);
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const auto VectorResult = FastNoise.SingleValue_2D_NoInline(Offset, X, Y);
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float Result[4];
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VectorStore(VectorResult, Result);
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ensure(Result[0] == Results[Byte][0] && Result[1] == Results[Byte][1] && Result[2] == Results[Byte][2] && Result[3] == Results[Byte][3]);
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}
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const double EndTime = FPlatformTime::Seconds();
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LOG_VOXEL(Log, TEXT("SIMD took %fs (%fns)"), EndTime - StartTime, (EndTime - StartTime) / Num * 1e9);
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}
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}
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UE_DEBUG_BREAK();
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}
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};
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