[fpc-devel] Extended in Win64

[petr.kristan at epos.cz]

On Tue, May 06, 2008 at 03:02:19PM +0200, petr.kristan at epos.cz wrote:
> Hi.
> 
> Why on Win64 on AMD64 is Extended type 64bit same as double and on Win32, Linux32 and
> Linux64 is 80bit. It breaks for example this construction:
> 
> procedure Swap(var X, Y: Double); overload;
> procedure Swap(var X, Y: Extended); overload; 
> 
> (I know that extended type is defined as float with the best precision on the
> given platform.)

I now found some explanations:
http://www.mail-archive.com/fpc-devel@lists.freepascal.org/msg08690.html

And explanation that 80-bit precision on AMD64 is depracated and should be
replaced by SIMD.
http://developer.amd.com/documentation/articles/Pages/62720069_4.aspx

Petr

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Ing. Petr Kristan
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