Converts a 32 bit float to an 8 bit float.
Values less than zero are all mapped to zero.
Values are truncated (rounded down) to the nearest 8 bit value.
Values between zero and the smallest representable value are rounded up.

public static sbyte FloatToByte(
	float f,
	int numMantissaBits,
	int zeroExp
)

Public Shared Function FloatToByte ( _
	f As Single, _
	numMantissaBits As Integer, _
	zeroExp As Integer _
) As SByte

public:
static signed char FloatToByte(
	float f, 
	int numMantissaBits, 
	int zeroExp
)