[Nasm-devel] Cleaned up a bunch of 64-bit stuff...

[H. P. A. <hp...@zy...>]

I have cleaned up a bunch of 64-bit things... there are probably still a 
few things we can't readily generate, such as 32-bit signed 
displacements instead of A0..A3 opcodes.

Fixing that probably entails cleaning up the handing of a16/a32/a64 (and 
o16/o32/o64).

I have also checked in a change which replaces multiple binary searches 
with a perfect hash of the entire token list.

	-hpa