public static Vector256 <T> AndNot <T>(Vector256 <T> left, Vector256 <T> right) where T : struct
{
if (typeof(T) == typeof(float))
{
if (Avx.IsSupported)
{
return(Avx.AndNot(left.AsSingle(), right.AsSingle()).As <float, T>());
}
}
if (typeof(T) == typeof(double))
{
if (Avx.IsSupported)
{
return(Avx.AndNot(left.AsDouble(), right.AsDouble()).As <double, T>());
}
}
if (Avx.IsSupported)
{
return(Avx.AndNot(left.AsSingle(), right.AsSingle()).As <float, T>());
}
return(SoftwareFallbacks.AndNot_Software(left, right));
}
public static Vector256 <float> Log(Vector256 <float> value)
{
Vector256 <float> invalidMask = Compare(value, Vector256 <float> .Zero, FloatComparisonMode.LessThanOrEqualOrderedNonSignaling);
Vector256 <float> x = Max(value, MinNormPos.AsSingle());
Vector256 <int> ei = Avx2.ShiftRightLogical(x.AsInt32(), 23);
x = Or(And(x, MantMask.AsSingle()), Point5);
ei = Avx2.Subtract(ei, Ox7);
Vector256 <float> e = Add(ConvertToVector256Single(ei), One);
Vector256 <float> mask = Compare(x, Sqrthf, FloatComparisonMode.LessThanOrderedNonSignaling);
Vector256 <float> tmp = And(x, mask);
x = Subtract(x, One);
e = Subtract(e, And(One, mask));
x = Add(x, tmp);
Vector256 <float> z = Multiply(x, x);
Vector256 <float> y = LogP0;
y = Add(Multiply(y, x), LogP1);
y = Add(Multiply(y, x), LogP2);
y = Add(Multiply(y, x), LogP3);
y = Add(Multiply(y, x), LogP4);
y = Add(Multiply(y, x), LogP5);
y = Add(Multiply(y, x), LogP6);
y = Add(Multiply(y, x), LogP7);
y = Add(Multiply(y, x), LogP8);
y = Multiply(Multiply(y, x), z);
y = Add(y, Multiply(e, LogQ1));
y = Subtract(y, Multiply(z, Point5));
x = Add(Add(x, y), Multiply(e, LogQ2));
return(Or(x, invalidMask));
}
public static Vector256 <float> Exp(Vector256 <float> value)
{
value = Min(value, MaxValue);
value = Max(value, MinValue);
Vector256 <float> fx = Multiply(value, Log2);
fx = Floor(Add(fx, Point5));
Vector256 <float> tmp = Multiply(fx, C1);
Vector256 <float> z = Multiply(fx, C2);
Vector256 <float> x = Subtract(value, tmp);
x = Subtract(x, z);
z = Multiply(x, x);
Vector256 <float> y = P0;
y = Add(Multiply(y, x), P1);
y = Add(Multiply(y, x), P2);
y = Add(Multiply(y, x), P3);
y = Add(Multiply(y, x), P4);
y = Add(Multiply(y, x), Point5);
y = Add(Add(Multiply(y, z), x), One);
Vector256 <int> pow2n = ConvertToVector256Int32(fx);
pow2n = Avx2.Add(pow2n, Ox7);
pow2n = Avx2.ShiftLeftLogical(pow2n, 23);
return(Multiply(y, pow2n.AsSingle()));
}
public static Vector256 <T> Vector256Add <T>(Vector256 <T> left, Vector256 <T> right) where T : struct
{
if (typeof(T) == typeof(byte))
{
return(Avx2.Add(left.AsByte(), right.AsByte()).As <byte, T>());
}
else if (typeof(T) == typeof(sbyte))
{
return(Avx2.Add(left.AsSByte(), right.AsSByte()).As <sbyte, T>());
}
else if (typeof(T) == typeof(short))
{
return(Avx2.Add(left.AsInt16(), right.AsInt16()).As <short, T>());
}
else if (typeof(T) == typeof(ushort))
{
return(Avx2.Add(left.AsUInt16(), right.AsUInt16()).As <ushort, T>());
}
else if (typeof(T) == typeof(int))
{
return(Avx2.Add(left.AsInt32(), right.AsInt32()).As <int, T>());
}
else if (typeof(T) == typeof(uint))
{
return(Avx2.Add(left.AsUInt32(), right.AsUInt32()).As <uint, T>());
}
else if (typeof(T) == typeof(long))
{
return(Avx2.Add(left.AsInt64(), right.AsInt64()).As <long, T>());
}
else if (typeof(T) == typeof(ulong))
{
return(Avx2.Add(left.AsUInt64(), right.AsUInt64()).As <ulong, T>());
}
else if (typeof(T) == typeof(float))
{
return(Avx.Add(left.AsSingle(), right.AsSingle()).As <float, T>());
}
else if (typeof(T) == typeof(double))
{
return(Avx.Add(left.AsDouble(), right.AsDouble()).As <double, T>());
}
else
{
throw new NotSupportedException();
}
}
//[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static __m256 exp256_ps(__m256 V)
{
__m256 x = V;
__m256 tmp = __m256.Zero;
__m256 one = SET(1.0f);
x = Avx2.Min(x, exp_hi);
x = Avx2.Max(x, exp_lo);
__m256 fx = Avx2.Multiply(x, cLOG2EF);
fx = Avx2.Add(fx, SET(0.5f));
tmp = Avx2.Floor(fx);
var mask = Avx2.Compare(tmp, fx, FloatComparisonMode.OrderedGreaterThanSignaling);
mask = Avx2.And(mask, one);
fx = Avx2.Subtract(tmp, mask);
tmp = Avx2.Multiply(fx, cexp_C1);
__m256 z = Avx2.Multiply(fx, cexp_C2);
x = Avx2.Subtract(x, tmp);
x = Avx2.Subtract(x, z);
z = Avx2.Multiply(x, x);
__m256 y = cexp_p0;
y = Fma.MultiplyAdd(y, x, cexp_p1);
y = Fma.MultiplyAdd(y, x, cexp_p2);
y = Fma.MultiplyAdd(y, x, cexp_p3);
y = Fma.MultiplyAdd(y, x, cexp_p4);
y = Fma.MultiplyAdd(y, x, cexp_p5);
y = Fma.MultiplyAdd(y, z, x);
y = Avx2.Add(y, one);
var imm0 = Avx2.ConvertToVector256Int32(fx);
var F7 = Vector256.Create((int)0x7f);
imm0 = Avx2.Add(imm0, F7);
imm0 = Avx2.ShiftLeftLogical(imm0, 23);
__m256 pow2n = Vector256.AsSingle(imm0);
y = Avx2.Multiply(y, pow2n);
return(y);
}
public static __m256 fast_exp256_ps(__m256 V)
{
return(Vector256.AsSingle(Avx2.ConvertToVector256Int32WithTruncation(Fma.MultiplyAdd(EXP_C2, V, EXP_C1))));
}
