Vincent Lefevre vincent at
Sun Mar 26 00:26:15 UTC 2017

On 2017-03-16 14:45:58 +0100, Torbjörn Granlund wrote:
> nisse at (Niels Möller) writes:
>   I think the "long double" type means an 80-bit floating point format
>   which was implemented in the original 80387 floating point coprocessor.
>   And which isn't supported by the later x86 SIMD instructions (and not
>   supported at all on on non-x86 platforms, as far as I'm aware).
> It is presumably the same as plain double almost everywhere.

The long double format depends on the platform. There are at least
4 possible formats (see our Handbook of Floating-Point Arithmetic,
or <>).

Vincent Lefèvre <vincent at> - Web: <>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)

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