public PseudoRandomExpr(Shape shape, PseudoRandomType type, Distribution distribution, ulong seed, ulong offset, string opCode = OpCodes.Random)
{
OpCode = opCode;
Shape = shape;
Seed = seed;
Distribution = distribution;
Offset = offset;
Type = type;
}
public static Expr <T> RandomUniform <T>(double from, double to, Shape shape = null, ulong?seed = null, ulong offset = 0UL,
PseudoRandomType type = PseudoRandomType.Default)
{
seed = seed ?? ((ulong)DateTime.Now.Ticks);
var width = (to - from).AsScalar <T>();
var origin = from.AsScalar <T>();
var prngExpr = new PseudoRandomExpr <T>(shape, type, new UniformDistribution(), seed.Value, offset);
return(origin + width * prngExpr);
}
public override Generator CreateRandomGenerator(PseudoRandomType type)
{
switch (type)
{
case PseudoRandomType.Default:
return(Alea.cuRAND.Generator.CreateCpu(RngType.PSEUDO_DEFAULT));
default:
throw new ArgumentOutOfRangeException();
}
}
public override Generator CreateRandomGenerator(PseudoRandomType type)
{
Generator rng;
switch (type)
{
case PseudoRandomType.Default:
rng = Generator.CreateGpu(Gpu, RngType.PSEUDO_DEFAULT);
break;
default:
throw new ArgumentOutOfRangeException();
}
rng.SetStream(Stream);
return(rng);
}
public static Expr <T> RandomNormal <T>(Shape shape = null, ulong?seed = null, ulong offset = 0UL,
double mean = 0.0, double stddev = 1.0, PseudoRandomType type = PseudoRandomType.Default)
{
seed = seed ?? ((ulong)DateTime.Now.Ticks);
return(new PseudoRandomExpr <T>(shape, type, new NormalDistribution(mean, stddev), seed.Value, offset));
}
public static Expr <T> RandomUniform <T>(Shape shape = null, ulong?seed = null, ulong offset = 0UL,
PseudoRandomType type = PseudoRandomType.Default)
{
seed = seed ?? ((ulong)DateTime.Now.Ticks);
return(new PseudoRandomExpr <T>(shape, type, new UniformDistribution(), seed.Value, offset));
}
public Alea.cuRAND.Generator GetRandomGenerator(PseudoRandomType type)
{
return(_pseudoRandomGenerators.GetOrAdd(type, CreateRandomGenerator));
}
public abstract Alea.cuRAND.Generator CreateRandomGenerator(PseudoRandomType type);
