[Issue 5323] std.math: struct FloatingPointControl, duplicate code and assumes X86

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=5323

--- Comment #6 from Iain Buclaw <ibuclaw at gdcproject.org> ---
Has been improved somewhat by:

https://github.com/dlang/phobos/pull/4272
https://github.com/dlang/phobos/pull/5769

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