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// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
//
using System;
using System.Numerics;
using System.Threading.Tasks;
namespace Algorithms
{
// This contains renderers that only use Vector<double>'s with no Vector<long> types. It's
// primarily useful when targeting AVX (not AVX2), because AVX doesn't support 256 bits of
// integer values, only floating point values.
internal class VectorDoubleStrictRenderer : FractalRenderer
{
private const double limit = 4.0;
private static Vector<double> s_dummy;
static VectorDoubleStrictRenderer()
{
s_dummy = Vector<double>.One;
}
public VectorDoubleStrictRenderer(Action<int, int, int> dp, Func<bool> abortFunc)
: base(dp, abortFunc)
{
}
// Render the fractal on multiple threads using the ComplexVecDouble data type
// For a well commented version, go see VectorFloatRenderer.RenderSingleThreadedWithADT in VectorFloat.cs
public void RenderMultiThreadedWithADT(float xminf, float xmaxf, float yminf, float ymaxf, float stepf)
{
double xmin = (double)xminf;
double xmax = (double)xmaxf;
double ymin = (double)yminf;
double ymax = (double)ymaxf;
double step = (double)stepf;
Vector<double> vmax_iters = new Vector<double>((double)max_iters);
Vector<double> vlimit = new Vector<double>(limit);
Vector<double> vstep = new Vector<double>(step);
Vector<double> vinc = new Vector<double>((double)Vector<double>.Count * step);
Vector<double> vxmax = new Vector<double>(xmax);
Vector<double> vxmin = VectorHelper.Create(i => xmin + step * i);
Parallel.For(0, (int)(((ymax - ymin) / step) + .5), (yp) =>
{
if (Abort)
return;
Vector<double> vy = new Vector<double>(ymin + step * yp);
int xp = 0;
for (Vector<double> vx = vxmin; Vector.LessThanOrEqualAny(vx, vxmax); vx += vinc, xp += Vector<double>.Count)
{
ComplexVecDouble num = new ComplexVecDouble(vx, vy);
ComplexVecDouble accum = num;
Vector<double> viters = Vector<double>.Zero;
Vector<double> increment = Vector<double>.One;
do
{
accum = accum.square() + num;
viters += increment;
Vector<double> vCond = Vector.LessThanOrEqual<double>(accum.sqabs(), vlimit) &
Vector.LessThanOrEqual<double>(viters, vmax_iters);
increment = increment & vCond;
} while (increment != Vector<double>.Zero);
viters.ForEach((iter, elemNum) => DrawPixel(xp + elemNum, yp, (int)iter));
}
});
}
// Render the fractal on multiple threads using raw Vector<double> data types
// For a well commented version, go see VectorFloatRenderer.RenderSingleThreadedWithADT in VectorFloat.cs
public void RenderMultiThreadedNoADT(float xminf, float xmaxf, float yminf, float ymaxf, float stepf)
{
double xmin = (double)xminf;
double xmax = (double)xmaxf;
double ymin = (double)yminf;
double ymax = (double)ymaxf;
double step = (double)stepf;
Vector<double> vmax_iters = new Vector<double>((double)max_iters);
Vector<double> vlimit = new Vector<double>(limit);
Vector<double> vstep = new Vector<double>(step);
Vector<double> vinc = new Vector<double>((double)Vector<double>.Count * step);
Vector<double> vxmax = new Vector<double>(xmax);
Vector<double> vxmin = VectorHelper.Create(i => xmin + step * i);
Parallel.For(0, (int)(((ymax - ymin) / step) + .5), (yp) =>
{
if (Abort)
return;
Vector<double> vy = new Vector<double>(ymin + step * yp);
int xp = 0;
for (Vector<double> vx = vxmin; Vector.LessThanOrEqualAny(vx, vxmax); vx += vinc, xp += Vector<double>.Count)
{
Vector<double> accumx = vx;
Vector<double> accumy = vy;
Vector<double> viters = Vector<double>.Zero;
Vector<double> increment = Vector<double>.One;
do
{
Vector<double> naccumx = accumx * accumx - accumy * accumy;
Vector<double> naccumy = accumx * accumy + accumx * accumy;
accumx = naccumx + vx;
accumy = naccumy + vy;
viters += increment;
Vector<double> sqabs = accumx * accumx + accumy * accumy;
Vector<double> vCond = Vector.LessThanOrEqual<double>(sqabs, vlimit) &
Vector.LessThanOrEqual<double>(viters, vmax_iters);
increment = increment & vCond;
} while (increment != Vector<double>.Zero);
viters.ForEach((iter, elemNum) => DrawPixel(xp + elemNum, yp, (int)iter));
}
});
}
// Render the fractal on a single thread using the ComplexVecDouble data type
// For a well commented version, go see VectorFloatRenderer.RenderSingleThreadedWithADT in VectorFloat.cs
public void RenderSingleThreadedWithADT(float xminf, float xmaxf, float yminf, float ymaxf, float stepf)
{
double xmin = (double)xminf;
double xmax = (double)xmaxf;
double ymin = (double)yminf;
double ymax = (double)ymaxf;
double step = (double)stepf;
Vector<double> vmax_iters = new Vector<double>((double)max_iters);
Vector<double> vlimit = new Vector<double>(limit);
Vector<double> vstep = new Vector<double>(step);
Vector<double> vinc = new Vector<double>((double)Vector<double>.Count * step);
Vector<double> vxmax = new Vector<double>(xmax);
Vector<double> vxmin = VectorHelper.Create(i => xmin + step * i);
double y = ymin;
int yp = 0;
for (Vector<double> vy = new Vector<double>(ymin); y <= ymax && !Abort; vy += vstep, y += step, yp++)
{
int xp = 0;
for (Vector<double> vx = vxmin; Vector.LessThanOrEqualAny(vx, vxmax); vx += vinc, xp += Vector<double>.Count)
{
ComplexVecDouble num = new ComplexVecDouble(vx, vy);
ComplexVecDouble accum = num;
Vector<double> viters = Vector<double>.Zero;
Vector<double> increment = Vector<double>.One;
do
{
accum = accum.square() + num;
viters += increment;
Vector<double> vCond = Vector.LessThanOrEqual<double>(accum.sqabs(), vlimit) &
Vector.LessThanOrEqual<double>(viters, vmax_iters);
increment = increment & vCond;
} while (increment != Vector<double>.Zero);
viters.ForEach((iter, elemNum) => DrawPixel(xp + elemNum, yp, (int)iter));
}
}
}
// Render the fractal on a single thread using raw Vector<double> data types
// For a well commented version, go see VectorFloatRenderer.RenderSingleThreadedWithADT in VectorFloat.cs
public void RenderSingleThreadedNoADT(float xminf, float xmaxf, float yminf, float ymaxf, float stepf)
{
double xmin = (double)xminf;
double xmax = (double)xmaxf;
double ymin = (double)yminf;
double ymax = (double)ymaxf;
double step = (double)stepf;
Vector<double> vmax_iters = new Vector<double>((double)max_iters);
Vector<double> vlimit = new Vector<double>(limit);
Vector<double> vstep = new Vector<double>(step);
Vector<double> vinc = new Vector<double>((double)Vector<double>.Count * step);
Vector<double> vxmax = new Vector<double>(xmax);
Vector<double> vxmin = VectorHelper.Create(i => xmin + step * i);
double y = ymin;
int yp = 0;
for (Vector<double> vy = new Vector<double>(ymin); y <= ymax && !Abort; vy += vstep, y += step, yp++)
{
int xp = 0;
for (Vector<double> vx = vxmin; Vector.LessThanOrEqualAny(vx, vxmax); vx += vinc, xp += Vector<double>.Count)
{
Vector<double> accumx = vx;
Vector<double> accumy = vy;
Vector<double> viters = Vector<double>.Zero;
Vector<double> increment = Vector<double>.One;
do
{
Vector<double> naccumx = accumx * accumx - accumy * accumy;
Vector<double> naccumy = accumx * accumy + accumx * accumy;
accumx = naccumx + vx;
accumy = naccumy + vy;
viters += increment;
Vector<double> sqabs = accumx * accumx + accumy * accumy;
Vector<double> vCond = Vector.LessThanOrEqual<double>(sqabs, vlimit) &
Vector.LessThanOrEqual<double>(viters, vmax_iters);
increment = increment & vCond;
} while (increment != Vector<double>.Zero);
viters.ForEach((iter, elemNum) => DrawPixel(xp + elemNum, yp, (int)iter));
}
}
}
}
}
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