Alex Richardson dd5ed53a2f RISC-V: Fix feenableexcept return value
The man page says "The feenableexcept(), fedisableexcept(), and
fegetexcept() functions return a bitmap of the exceptions that were
unmasked prior to the call.", so we should return zero not -1.

Reviewed By:	mhorne
MFC after:	3 days
Differential Revision: https://reviews.freebsd.org/D29386
2021-03-25 11:16:20 +00:00
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