How many bytes in a real ?

[rsw0x via Digitalmars-d]

On Monday, 24 August 2015 at 21:55:40 UTC, Guillaume Chatelet 
wrote:
> On linux x86_64 : real.sizeof == 16 but it looks like only the 
> first the first 10 bytes are used (ie. 80bits)
>
> Is there a way to know the real size of a real ?

http://dlang.org/type.html
	largest FP size implemented in hardwareImplementation Note: 80 
bits for x86 CPUs or double size, whichever is larger