public static long ConvertDoubleToInt64(double x, FPtoIntegerConversionType t)
{
if (t == FPtoIntegerConversionType.CONVERT_NATIVECOMPILERBEHAVIOR)
{
return((long)x);
}
x = Truncate(x); // truncate (round toward zero)
// (double)LLONG_MAX cannot be represented exactly as double
const double llong_max_plus_1 = (double)((ulong)long.MaxValue + 1);
switch (t)
{
case FPtoIntegerConversionType.CONVERT_MANAGED_BACKWARD_COMPATIBLE_X86_X64:
case FPtoIntegerConversionType.CONVERT_BACKWARD_COMPATIBLE:
case FPtoIntegerConversionType.CONVERT_SENTINEL:
return((Double.IsNaN(x) || (x < long.MinValue) || (x >= llong_max_plus_1)) ? long.MinValue : (long)x);
case FPtoIntegerConversionType.CONVERT_MANAGED_BACKWARD_COMPATIBLE_ARM32:
if (x > 0)
{
return((long)CppNativeArm32ConvertDoubleToUInt64(x));
}
else
{
return(-(long)CppNativeArm32ConvertDoubleToUInt64(-x));
}
case FPtoIntegerConversionType.CONVERT_SATURATING:
return(Double.IsNaN(x) ? 0 : (x < long.MinValue) ? long.MinValue : (x >= llong_max_plus_1) ? long.MaxValue : (long)x);
}
return(0);
public static uint ConvertDoubleToUInt32(double x, FPtoIntegerConversionType t)
{
if (t == FPtoIntegerConversionType.CONVERT_NATIVECOMPILERBEHAVIOR)
{
return((uint)x);
}
x = Truncate(x); // truncate (round toward zero)
const double llong_max_plus_1 = (double)((ulong)long.MaxValue + 1);
switch (t)
{
case FPtoIntegerConversionType.CONVERT_MANAGED_BACKWARD_COMPATIBLE_X86_X64:
case FPtoIntegerConversionType.CONVERT_BACKWARD_COMPATIBLE:
return((Double.IsNaN(x) || (x < long.MinValue) || (x >= llong_max_plus_1)) ? 0 : (uint)(long)x);
case FPtoIntegerConversionType.CONVERT_SENTINEL:
return((Double.IsNaN(x) || (x < 0) || (x > uint.MaxValue)) ? uint.MaxValue : (uint)x);
case FPtoIntegerConversionType.CONVERT_SATURATING:
case FPtoIntegerConversionType.CONVERT_MANAGED_BACKWARD_COMPATIBLE_ARM32:
return((Double.IsNaN(x) || (x < 0)) ? 0 : (x > uint.MaxValue) ? uint.MaxValue : (uint)x);
}
return(0);
}
public static int ConvertDoubleToInt32(double x, FPtoIntegerConversionType t)
{
if (t == FPtoIntegerConversionType.CONVERT_NATIVECOMPILERBEHAVIOR)
{
return((int)x);
}
x = Truncate(x); // truncate (round toward zero)
switch (t)
{
case FPtoIntegerConversionType.CONVERT_MANAGED_BACKWARD_COMPATIBLE_X86_X64:
case FPtoIntegerConversionType.CONVERT_BACKWARD_COMPATIBLE:
case FPtoIntegerConversionType.CONVERT_SENTINEL:
return((Double.IsNaN(x) || (x < int.MinValue) || (x > int.MaxValue)) ? int.MinValue: (int)x);
case FPtoIntegerConversionType.CONVERT_SATURATING:
case FPtoIntegerConversionType.CONVERT_MANAGED_BACKWARD_COMPATIBLE_ARM32:
return(Double.IsNaN(x) ? 0 : (x < int.MinValue) ? int.MinValue : (x > int.MaxValue) ? int.MaxValue : (int)x);
}
return(0);
}
public static extern ulong ConvertDoubleToUInt64(double x, FPtoIntegerConversionType t);
public static extern uint ConvertDoubleToUInt32(double x, FPtoIntegerConversionType t);
