Floating point rounding

[ag0aep6g via Digitalmars-d-learn]

On 03/03/2017 05:39 PM, ag0aep6g wrote:
> dmd generates SSE instructions for floating point math.
> FloatingPointControl only minds the control register for the FPU. But
> SSE instructions are not affected by that. SSE has a separate control
> register: MXCSR.

I've filed an issue:
     https://issues.dlang.org/show_bug.cgi?id=17243
and am attempting to fix it:
     https://github.com/dlang/phobos/pull/5240