[Bug target/53513] [SH] Add support for fschg and fpchg insns and improve fenv support

[kkojima at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53513

--- Comment #39 from Kazumoto Kojima <kkojima at gcc dot gnu.org> ---
(In reply to Oleg Endo from comment #38)
> ... there are no new failures for -m4 -ml and -m4 -mb.  I'm tempted to apply
> it.  Kaz, do you have any objections?

I have no objection.