[Bug libgcc/78804] [RX] -m64bit-doubles does not work

[olegendo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78804

--- Comment #9 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Created attachment 41982
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41982&action=edit
Proposed patch

I'd propose to remove the FLOAT_BIT_ORDER_MISMATCH stuff altogether.  It's more
portable to use shift-and-mask than bitfields.  Bitfields depend on too many
things, like BITS_BIG_ENDIAN, BIGGEST_FIELD_ALIGNMENT, ....

The patch fixes the issue on RX.