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Date: Sat, 8 Feb 2020 08:25:43 +1100 (AEDT)
From: Damian McGuckin <>
Subject: Re: Considering x86-64 fenv.s to C

In considering an i386 architecture with XMM capability, there is an issue
with fegetenv()/feholdexcept() and fesetenv()/feupdateenv().

There is no __mxcsr field in the fenv_t structure.

So, there is no way to return the MXCSR using the first pair.

Do I just bury any MXCSR exceptions into the __status_word?

Regards - Damian

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