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Re: [PATCH 3/4] Add ILP32 support to aarch64
On Thu, 3 Aug 2017, Steve Ellcey wrote:
> I hadn't considered that. So maybe I could save the environment
> (feholdexcept), do the calculation and see which exceptions, if any,
> got raised. Then restore the original environment (fesetenv) and raise
> one or the other exceptions if needed. Does that sound like a workable
Yes, you could do that (see x86/x86_64 nearbyintl for example; that needs
to preserve "invalid" for signaling NaNs, avoid "inexact" from frndint,
but not clear any "inexact" that was already raised). Whether doing so is
optimal, versus using another implementation of the function for ILP32,
may depend on the AArch64 performance characteristics of saving and
restoring the environment.
Joseph S. Myers