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From:	Achim Gratz <Stromeko AT nexgo DOT de>
To:	cygwin AT cygwin DOT com
Subject:	Re: [ANNOUNCEMENT] TEST RELEASE: Cygwin 2.11.0-0.1
References:	<announce DOT 20180809202604 DOT GN4180 AT calimero DOT vinschen DOT de> <cc1d684fabcfe5e581ec82aae1617471 AT smtp-cloud8 DOT xs4all DOT net>
Date:	Mon, 13 Aug 2018 22:27:36 +0200
In-Reply-To:	<cc1d684fabcfe5e581ec82aae1617471@smtp-cloud8.xs4all.net> (Houder's message of "Fri, 10 Aug 2018 13:05:35 +0200")
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Houder writes:
> from:
> const int xxx = 0x3d; // FE_ALL_EXCEPT on Linux, i.e. the denormal-operand
>                       // exception is excluded on Linux
>
> to:
> const int xxx = 0x3f; // Cygwin allows the denormal-operand exception;
>                       // Linux (Andreas Jaeger) does not.
>                       // This exception is not defined by the IEEE 754
>                       // standard (Floating-Point Arithmetic)
>
> (denormal-operand = input of a subnormal value)

Linux supports a range of hardware where denormals are not supported or
a major performance hit.  Windows should be only supported on hardware
where this problem doesn't exist.  That said, numerical software that
relies on correct denormals is really rare and following Linux might be
a good idea.


Regards,
Achim.
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