Reference for unit 'ctypes': Procedures and functions

`add(clongdouble,Double):Double`
`add(Double,clongdouble):Double`		Implement addition of `clongdouble` and `double`.
`assign(clongdouble):Double`		Implement assignment of a `clongdouble` to a `double` type.
`assign(Double):clongdouble`		Implement assignment of a `double` to a `clongdouble` type.
`divide(clongdouble,Double):Double`		Implement division of `double` and `clongdouble`.
`divide(Double,clongdouble):Double`		Implement division of `clongdouble` and `double`.
`equal(clongdouble,Double):Boolean`		Implement equality of `clongdouble` and `double`.
`equal(Double,clongdouble):Boolean`		Implement equality of `double` and `clongdouble`.
`greaterthan(clongdouble,Double):Boolean`		Implement greater than comparison between `double` and `clongdouble`.
`greaterthan(Double,clongdouble):Boolean`		Implement greater than comparison between `clongdouble` and `double`.
`greaterthanorequal(clongdouble,Double):Boolean`		Implement greater than or equal comparison between `double` and `clongdouble`.
`greaterthanorequal(Double,clongdouble):Boolean`		Implement greater than or equal comparison between `clongdouble` and `double`.
`lessthan(clongdouble,Double):Boolean`		Implement less than comparison between `double` and `clongdouble`.
`lessthan(Double,clongdouble):Boolean`		Implement less than comparison between `clongdouble` and `double`.
`lessthanorequal(clongdouble,Double):Boolean`		Implement greater than or equal comparison between `double` and `clongdouble`.
`lessthanorequal(Double,clongdouble):Boolean`		Implement less than or equal comparison between `clongdouble` and `double`.
`multiply(clongdouble,Double):Double`		Implement multiplication of `clongdouble` and `double`.
`multiply(Double,clongdouble):Double`		Implement multiplication of `double` and `clongdouble`.
`subtract(clongdouble,Double):Double`		Implement subtraction of `double` and `clongdouble`.
`subtract(Double,clongdouble):Double`		Implement subtraction of `clongdouble` and `double`.