public static ref T or <T>(ref T lhs, T rhs)
where T : unmanaged
{
if (typeof(T) == typeof(float))
{
BitConverter.Int32BitsToSingle(BitConverter.SingleToInt32Bits(float32(lhs)) | BitConverter.SingleToInt32Bits(float32(rhs)));
}
else if (typeof(T) == typeof(float))
{
BitConverter.Int64BitsToDouble(BitConverter.DoubleToInt64Bits(float64(lhs)) | BitConverter.DoubleToInt64Bits(float64(rhs)));
}
else
{
throw unsupported <T>();
}
return(ref lhs);
}
public static ShaderIrOperImmf GetOperImmf19_20(long OpCode)
{
uint Imm = (uint)(OpCode >> 20) & 0x7ffff;
bool Neg = ((OpCode >> 56) & 1) != 0;
Imm <<= 12;
if (Neg)
{
Imm |= 0x80000000;
}
float Value = BitConverter.Int32BitsToSingle((int)Imm);
return(new ShaderIrOperImmf(Value));
}
public override async Task <Vertex[]> GetVerticesAsync()
{
if (CachedVerticies != null)
{
return(CachedVerticies);
}
var xArr = await Stream.GetAttributeArray(VertexAttribute.X);
var yArr = await Stream.GetAttributeArray(VertexAttribute.Y);
var zArr = await Stream.GetAttributeArray(VertexAttribute.Z);
var cArr = await Stream.GetAttributeArray(VertexAttribute.Color);
var uvArr = await GetUVsAsync();
var vtxArr = new Vertex[Stream.Length];
for (int i = 0; i < vtxArr.Length; i++)
{
var x = BitConverter.Int32BitsToSingle(xArr[i]);
var y = BitConverter.Int32BitsToSingle(yArr[i]);
var z = BitConverter.Int32BitsToSingle(zArr[i]);
var xyz = new Vector3(x, y, z);
var uv = uvArr[i];
var c = BitConverter.GetBytes(cArr[i]);
var r = c[0] / 255.0f;
var g = c[1] / 255.0f;
var b = c[2] / 255.0f;
var a = c[3] / 255.0f;
var color = new Color(r, g, b, a);
vtxArr[i] = new Vertex(i, xyz, uv, color);
}
CachedVerticies = vtxArr;
return(vtxArr);
}
public static float PreviousFloat(float value)
{
if (value <= 0)
{
return(-NextFloat(-value));
}
if (float.IsNaN(value))
{
return(value);
}
if (float.IsNegativeInfinity(value))
{
return(value);
}
int bits = BitConverter.SingleToInt32Bits(value);
return(BitConverter.Int32BitsToSingle(bits - 1));
}
public static TestStruct Create()
{
var testStruct = new TestStruct();
var random = new Random();
for (var i = 0; i < Op1ElementCount; i++)
{
_data1[i] = TestLibrary.Generator.GetSingle();
}
Unsafe.CopyBlockUnaligned(ref Unsafe.As <Vector256 <Single>, byte>(ref testStruct._fld1), ref Unsafe.As <Single, byte>(ref _data1[0]), (uint)Unsafe.SizeOf <Vector256 <Single> >());
for (var i = 0; i < Op2ElementCount; i++)
{
_data2[i] = BitConverter.Int32BitsToSingle(1);
}
Unsafe.CopyBlockUnaligned(ref Unsafe.As <Vector256 <Single>, byte>(ref testStruct._fld2), ref Unsafe.As <Single, byte>(ref _data2[0]), (uint)Unsafe.SizeOf <Vector256 <Single> >());
return(testStruct);
}
public unsafe static void ConvertD32FS8ToD24S8(Span <byte> output, ReadOnlySpan <byte> input)
{
Span <uint> outputUint = MemoryMarshal.Cast <byte, uint>(output);
ReadOnlySpan <uint> inputUint = MemoryMarshal.Cast <byte, uint>(input);
int i = 0;
for (; i < inputUint.Length; i += 2)
{
float depth = BitConverter.Int32BitsToSingle((int)inputUint[i]);
uint stencil = inputUint[i + 1];
uint depthStencil = (Math.Clamp((uint)(depth * 0xffffff), 0, 0xffffff) << 8) | (stencil & 0xff);
int j = i >> 1;
outputUint[j] = depthStencil;
}
}
public static float Exp2(float power)
{
if (MathF.Abs(power) > MathV.FloatMaximumPower)
{
throw new ArgumentOutOfRangeException(nameof(power));
}
// R for polynomial generation
// exponent2 = data.frame(x = seq(-0.536, 0.536, by = 0.001))
// exponent2$exp = 2 ^ (exponent2$x)
// exponentFit = lm(exp ~x + I(x ^ 2) + I(x ^ 3) + I(x ^ 4) + I(x ^ 5), data = exponent2)
float integerPart = MathF.Round(power);
float x = power - integerPart; // fractional part
float integerExponent = BitConverter.Int32BitsToSingle(((int)integerPart + MathV.FloatMantissaZero) << MathV.FloatMantissaBits);
float fractionalExponent = MathV.One + MathV.Exp2Beta1 * x + MathV.Exp2Beta2 * x * x + MathV.Exp2Beta3 * x * x * x + MathV.Exp2Beta4 * x * x * x * x;
return(integerExponent * fractionalExponent);
}
public static float VectorExtractSingle(Vector128 <float> Vector, byte Index)
{
if (Sse41.IsSupported)
{
return(Sse41.Extract(Vector, Index));
}
else if (Sse2.IsSupported)
{
Vector128 <ushort> ShortVector = Sse.StaticCast <float, ushort>(Vector);
int Low = Sse2.Extract(ShortVector, (byte)(Index * 2 + 0));
int High = Sse2.Extract(ShortVector, (byte)(Index * 2 + 1));
return(BitConverter.Int32BitsToSingle(Low | (High << 16)));
}
throw new PlatformNotSupportedException();
}
public static float NextFloat(float value)
{
if (value < 0)
{
return(-PreviousFloat(-value));
}
value = System.Math.Abs(value); // needed to handle -0
if (float.IsNaN(value))
{
return(value);
}
if (float.IsPositiveInfinity(value))
{
return(value);
}
int bits = BitConverter.SingleToInt32Bits(value);
return(BitConverter.Int32BitsToSingle(bits + 1));
}
public unsafe void SetExtraData(float FlipX, float FlipY, int Instance)
{
BindProgram();
EnsureExtraBlock();
GL.BindBuffer(BufferTarget.UniformBuffer, ExtraUboHandle);
float *Data = stackalloc float[ExtraDataSize];
Data[0] = FlipX;
Data[1] = FlipY;
Data[2] = BitConverter.Int32BitsToSingle(Instance);
//Invalidate buffer
GL.BufferData(BufferTarget.UniformBuffer, ExtraDataSize * sizeof(float), IntPtr.Zero, BufferUsageHint.StreamDraw);
GL.BufferSubData(BufferTarget.UniformBuffer, IntPtr.Zero, ExtraDataSize * sizeof(float), (IntPtr)Data);
}
public static void RegisterAllLittleEndian()
{
Register(BinaryPrimitives.ReadInt16LittleEndian, BinaryPrimitives.WriteInt16LittleEndian);
Register(BinaryPrimitives.ReadInt32LittleEndian, BinaryPrimitives.WriteInt32LittleEndian);
Register(BinaryPrimitives.ReadInt64LittleEndian, BinaryPrimitives.WriteInt64LittleEndian);
Register(BinaryPrimitives.ReadUInt16LittleEndian, BinaryPrimitives.WriteUInt16LittleEndian);
Register(BinaryPrimitives.ReadUInt32LittleEndian, BinaryPrimitives.WriteUInt32LittleEndian);
Register(BinaryPrimitives.ReadInt64LittleEndian, BinaryPrimitives.WriteInt64LittleEndian);
Register(BinaryPrimitives.ReadUInt64LittleEndian, BinaryPrimitives.WriteUInt64LittleEndian);
Register(
src => BitConverter.Int32BitsToSingle(BinaryPrimitives.ReadInt32LittleEndian(src)),
(dst, val) => BinaryPrimitives.WriteInt32LittleEndian(dst, BitConverter.SingleToInt32Bits(val)));
Register(
src => BitConverter.Int64BitsToDouble(BinaryPrimitives.ReadInt64LittleEndian(src)),
(dst, val) => BinaryPrimitives.WriteInt64LittleEndian(dst, BitConverter.DoubleToInt64Bits(val)));
IsAlreadySet = true;
Endianness = Endianness.LittleEndian;
}
/// <summary>Parses PID coefficient floating point values from the raw bytes</summary>
private static PID ParsePid(List <byte> pidRaw)
{
if (pidRaw?.Count() != 12)
{
return(0, 0, 0);
}
byte[] raw = new byte[12];
for (uint x = 0; x < 12; x++)
{
raw[x] = pidRaw[(int)(4 * (x / 4) + 3 - x % 4)];
}
float p = BitConverter.Int32BitsToSingle(BitConverter.ToInt32(raw, 0));
float i = BitConverter.Int32BitsToSingle(BitConverter.ToInt32(raw, 4));
float d = BitConverter.Int32BitsToSingle(BitConverter.ToInt32(raw, 8));
return(p, i, d);
}
private long[] UploadShaders(NvGpuVmm Vmm)
{
long[] Tags = new long[5];
long BasePosition = MakeInt64From2xInt32(NvGpuEngine3dReg.ShaderAddress);
for (int Index = 0; Index < 6; Index++)
{
int Control = ReadRegister(NvGpuEngine3dReg.ShaderNControl + Index * 0x10);
int Offset = ReadRegister(NvGpuEngine3dReg.ShaderNOffset + Index * 0x10);
//Note: Vertex Program (B) is always enabled.
bool Enable = (Control & 1) != 0 || Index == 1;
if (!Enable)
{
continue;
}
long Tag = BasePosition + (uint)Offset;
GalShaderType ShaderType = GetTypeFromProgram(Index);
Tags[(int)ShaderType] = Tag;
Gpu.Renderer.CreateShader(Vmm, Tag, ShaderType);
Gpu.Renderer.BindShader(Tag);
}
int RawSX = ReadRegister(NvGpuEngine3dReg.ViewportScaleX);
int RawSY = ReadRegister(NvGpuEngine3dReg.ViewportScaleY);
float SX = BitConverter.Int32BitsToSingle(RawSX);
float SY = BitConverter.Int32BitsToSingle(RawSY);
float SignX = MathF.Sign(SX);
float SignY = MathF.Sign(SY);
Gpu.Renderer.SetUniform2F(GalConsts.FlipUniformName, SignX, SignY);
return(Tags);
}
public static FQuat ReadQuatFloat32NoW(this FArchive Ar)
{
const int XShift = 21;
const int YShift = 10;
const uint ZMask = 0x000003ff;
const uint YMask = 0x001ffc00;
const uint XMask = 0xffe00000;
var packed = Ar.Read <uint>();
var unpackedX = packed >> XShift;
var unpackedY = (packed & YMask) >> YShift;
var unpackedZ = (packed & ZMask);
var x = BitConverter.Int32BitsToSingle((int)(((((unpackedX >> 7) & 7) + 123) << 23) | ((unpackedX & 0x7F | 32 * (unpackedX & 0xFFFFFC00)) << 16)));
var y = BitConverter.Int32BitsToSingle((int)(((((unpackedY >> 7) & 7) + 123) << 23) | ((unpackedY & 0x7F | 32 * (unpackedY & 0xFFFFFC00)) << 16)));
var z = BitConverter.Int32BitsToSingle((int)(((((unpackedZ >> 6) & 7) + 123) << 23) | ((unpackedZ & 0x3F | 32 * (unpackedZ & 0xFFFFFE00)) << 17)));
var wSquared = 1.0f - x * x - y * y - z * z;
return(new FQuat(x, y, z, wSquared > 0.0f ? MathF.Sqrt(wSquared) : 0.0f));
}
/// <summary>
/// Sets the constant values required by the FSR RCAS shader on the provided command buffer
///
/// Logic ported from "FsrRcasCon()" in Runtime/PostProcessing/Shaders/ffx/ffx_fsr1.hlsl
/// For a more user-friendly version of this function, see SetRcasConstantsLinear().
/// </summary>
/// <param name="cmd">Command buffer to modify</param>
/// <param name="sharpnessStops">The scale is {0.0 := maximum, to N>0, where N is the number of stops(halving) of the reduction of sharpness</param>
public static void SetRcasConstants(CommandBuffer cmd, float sharpnessStops = kDefaultSharpnessStops)
{
// Transform from stops to linear value.
float sharpnessLinear = Mathf.Pow(2.0f, -sharpnessStops);
Vector4 constants;
uint sharpnessAsHalf = Mathf.FloatToHalf(sharpnessLinear);
int packedSharpness = (int)(sharpnessAsHalf | (sharpnessAsHalf << 16));
float packedSharpnessAsFloat = BitConverter.Int32BitsToSingle(packedSharpness);
constants.x = sharpnessLinear;
constants.y = packedSharpnessAsFloat;
// Fill the last constant with zeros to avoid using uninitialized memory
constants.z = 0.0f;
constants.w = 0.0f;
cmd.SetGlobalVector(ShaderConstants._FsrRcasConstants, constants);
}
public override string ToString()
{
var opcodeString = EnumUtils.GetDescription(OpCode);
switch (GetOperandKind(OpCode))
{
case OperandKind.None:
return(opcodeString);
case OperandKind.BrTableOperand:
return($"{opcodeString} {string.Join("-", uIntArrayOperand!.Select(x => $"0x{x:X}"))} 0x{operand:x}");
case OperandKind.BlockType:
return($"{opcodeString} {(ValueKind)operand}");
case OperandKind.LabelIndex:
case OperandKind.FuncIndex:
case OperandKind.IndirectCallTypeIndex:
return($"{opcodeString} 0x{operand:X}");
case OperandKind.MemArg:
return($"{opcodeString} 0x{operand & 0xFFFFFFFF00000000:X} 0x{operand & 0xFFFFFFFF:X}");
case OperandKind.Zero:
case OperandKind.LocalIndex:
case OperandKind.GlobalIndex:
case OperandKind.ImmediateI32:
case OperandKind.ImmediateI64:
return($"{opcodeString} {operand}");
case OperandKind.ImmediateF32:
return($"{opcodeString} {BitConverter.Int32BitsToSingle((int)operand)}");
case OperandKind.ImmediateF64:
return($"{opcodeString} {BitConverter.Int64BitsToDouble((long)operand)}");
default:
throw new ArgumentOutOfRangeException();
}
}
public Single ReadSingle(Int64 position)
{
int sizeOfType = sizeof(Single);
EnsureSafeToRead(position, sizeOfType);
Single result;
unsafe {
byte *pointer = null;
RuntimeHelpers.PrepareConstrainedRegions();
try {
_buffer.AcquirePointer(ref pointer);
pointer += (_offset + position);
#if ALIGN_ACCESS
// check if pointer is aligned
if (((int)pointer & (sizeOfType - 1)) == 0)
{
#endif
result = BitConverter.Int32BitsToSingle(*((int *)(pointer)));
#if ALIGN_ACCESS
}
else
{
UInt32 tempResult = (UInt32)(*pointer | *(pointer + 1) << 8 | *(pointer + 2) << 16 | *(pointer + 3) << 24);
result = *((float *)&tempResult);
}
#endif
}
finally {
if (pointer != null)
{
_buffer.ReleasePointer();
}
}
}
return(result);
}
public static float HalfToSingle(int value)
{
int mantissa = (value >> 0) & 0x3ff;
int exponent = (value >> 10) & 0x1f;
int sign = (value >> 15) & 0x1;
if (exponent == 0x1f)
{
// NaN or Infinity.
mantissa <<= 13;
exponent = 0xff;
}
else if (exponent != 0 || mantissa != 0)
{
if (exponent == 0)
{
// Denormal.
int e = -1;
int m = mantissa;
do
{
e++;
m <<= 1;
}while ((m & 0x400) == 0);
mantissa = m & 0x3ff;
exponent = e;
}
mantissa <<= 13;
exponent = 127 - 15 + exponent;
}
int output = (sign << 31) | (exponent << 23) | mantissa;
return(BitConverter.Int32BitsToSingle(output));
}
/// <summary>
/// Reads a <see cref="float"/> value from an array of bytes.
/// </summary>
/// <param name="bytes">The array of bytes to read from.</param>
/// <param name="position">The position in the array where the value should be read.</param>
/// <param name="endianness">The endianness.</param>
/// <returns>The value.</returns>
public static float ReadFloat(this byte[] bytes, int position, Endianness endianness)
{
Debug.Assert(bytes != null && position >= 0 && bytes.Length >= position + SizeOfFloat);
int value;
unchecked
{
value = endianness.IsBigEndian()
? bytes[position] << 24 | bytes[position + 1] << 16 |
bytes[position + 2] << 8 | bytes[position + 3]
: bytes[position] | bytes[position + 1] << 8 |
bytes[position + 2] << 16 | bytes[position + 3] << 24;
}
#if NETSTANDARD2_0
return(BitConverter.ToSingle(BitConverter.GetBytes(value), 0));
#else
// this is essentially an unsafe *((float*)&value)
return(BitConverter.Int32BitsToSingle(value));
#endif
}
public static float ConvertHalfToSingle(ushort x)
{
uint x_sign = (uint)(x >> 15) & 0x0001;
uint x_exp = (uint)(x >> 10) & 0x001F;
uint x_mantissa = (uint)x & 0x03FF;
if (x_exp == 0 && x_mantissa == 0)
{
// Zero
return(BitConverter.Int32BitsToSingle((int)(x_sign << 31)));
}
if (x_exp == 0x1F)
{
// NaN or Infinity
return(BitConverter.Int32BitsToSingle((int)((x_sign << 31) | 0x7F800000 | (x_mantissa << 13))));
}
int exponent = (int)x_exp - 15;
if (x_exp == 0)
{
// Denormal
x_mantissa <<= 1;
while ((x_mantissa & 0x0400) == 0)
{
x_mantissa <<= 1;
exponent--;
}
x_mantissa &= 0x03FF;
}
uint new_exp = (uint)((exponent + 127) & 0xFF) << 23;
return(BitConverter.Int32BitsToSingle((int)((x_sign << 31) | new_exp | (x_mantissa << 13))));
}
public void Step1()
{
var num = new[] { 0.001f, 0.01f, 0.0625f, 0.1f, 0.25f, 0.5f, 1f, 2f, 4f, 8f, 10f, 16f, 100f, 1000f };
foreach (var n in num)
{
var c1 = 0x5f3759df;
var c2 = 1597488759;
var ans = 1.0f / Math.Sqrt(n);
// Console.WriteLine(FloatToString(n));
// Console.WriteLine(FloatToString(1.0f / (float)Math.Sqrt(n)));
var i = BitConverter.SingleToInt32Bits(n);
var sum1 = c1 - (i >> 1);
var y1 = BitConverter.Int32BitsToSingle(sum1);
var sum2 = c2 - (i >> 1);
var y2 = BitConverter.Int32BitsToSingle(sum2);
var diff = Math.Abs(ans - y1) < Math.Abs(ans - y2) ? "<" : ">";
Console.WriteLine("{0}, {1}, {2}", ans - y1, ans - y2, diff);
}
}
private void CheckOneSingle(string s, uint expectedBits)
{
CheckOneSingle(s, BitConverter.Int32BitsToSingle((int)(expectedBits)));
}
private float ReadRegisterFloat(NvGpuEngine3dReg Reg)
{
return(BitConverter.Int32BitsToSingle(ReadRegister(Reg)));
}
public static float ReplacementInt32ToSingleBits(this int value) => BitConverter.Int32BitsToSingle(value);
public float ReadFloat()
{
return(BitConverter.Int32BitsToSingle(this.ReadInt()));
}
public static float ReadFloatRaw <TInput>(ref Reader <TInput> reader) => BitConverter.Int32BitsToSingle(reader.ReadInt32());
public virtual unsafe float ReadSingle() => BitConverter.Int32BitsToSingle(BinaryPrimitives.ReadInt32LittleEndian(InternalRead(4)));
private static ShaderIrOperImmf Immf32_20(this long OpCode)
{
return(new ShaderIrOperImmf(BitConverter.Int32BitsToSingle((int)(OpCode >> 20))));
}
public float AsFloat()
{
return BitConverter.Int32BitsToSingle((int)Value);
}
public static float ReadSingleLittleEndian(ReadOnlySpan <byte> source)
{
return(!BitConverter.IsLittleEndian ?
BitConverter.Int32BitsToSingle(ReverseEndianness(MemoryMarshal.Read <int>(source))) :
MemoryMarshal.Read <float>(source));
}
