Re: [boost] Portable signbit macro/function?

From: Johan Råde (rade_at_[hidden])
Date: 2006-08-04 08:29:59

Gennaro Prota wrote:
> On Fri, 4 Aug 2006 09:53:35 +0100, "John Maddock"
> <john_at_[hidden]> wrote:
> 
>> Johan Råde wrote:
>>> This can be templatized, and will handle such things as 80-bit long
>>> double.
>> Maybe, don't forget the padding bytes that are often injected into such 
>> types (only an issue if the endianness put's the sign bit at the end of the 
>> 10-byte sequence rather than the beginning).
> 
> There are also platforms that add parity, so you can get two 1 bits in
> the object representation.
> 
> As I said, the code is widely portable (probably on all
> implementations supported by boost) not fully portable.
> 
> --
> [ Gennaro Prota, C++ developer for hire ]
> 
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Does IEEE 754 allow a parity bit?

--Johan Råde