[PATCH] D126364: Fix interaction of pragma FENV_ACCESS with other pragmas

Mon Jun 6 11:21:02 PDT 2022

efriedma added a comment.

In D126364#3560984 <https://reviews.llvm.org/D126364#3560984>, @sepavloff wrote:

> In D126364#3560877 <https://reviews.llvm.org/D126364#3560877>, @efriedma wrote:
>
>> Shouldn't the rounding mode be FE_DYNAMIC by default?
>
> According to the standard it must be FE_TONEAREST:
>
>   F.8.3p1:
>   At program startup the dynamic floating-point environment is initialized as prescribed by IEC 60559:
>   ...
>   - The dynamic rounding direction mode is rounding to nearest.
>   ...

When I say the default should be FE_DYNAMIC, I'm talking about the default FENV_ROUND state.  That's talking about the initial state of the floating-point registers at runtime (on entry to main()).

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https://reviews.llvm.org/D126364