Add some casts to get rid of "bitwise op on signed value is non-portable"
warning from lint.

branches: 1.10.2;
Use excb before and after the mt_fpcr/mf_fpcr instructions as specified
in the alpha ARM 4.7.8.1 (Accessing the FPCR):

Because Alpha floating-point hardware can overlap the execution of
a number of floating-point instructions, accessing the FPCR must
be synchronized with other floating-point instructions. An EXCB
instruction must be issued both prior to and after accessing the
FPCR to ensure that the FPCR access is synchronized with the
execution of previous and subsequent floating-point instructions;
otherwise synchronization is not ensured.

Use unions to convert between double and uint64_t to avoid casting.

branches: 1.9.42;
__asm__ -> __asm

Add missing __RCSID()

add a cast appease gcc3.3

netbsd.org->NetBSD.org

Add internal names for fp{get,set}{mask,round,sticky}(), and
externally-visible weak aliases for the internal names.

remove the trapb ops bracketing mf_fpcr, in this one case they aren't needed

branches: 1.3.4;
sweep of my licenses (userland files w/o only my copyright) for
consistency. (no functional changes)

fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.1.18;
get & set FP rounding direction. these actually seem to work.