A&O Jerry Maine 2009-8-09: Amd64 simd port

[Jerry Maine]

Sorry for being terribly late, getting ready to move.

Achievements: Regalloc patch finished and commented to svn head. Any
comments please send my way.

Objectives: Work on getters/setters to make them more efficient and add
sse4.1 getter/setter intrinsics. Find a way to do indexers as intrinsics
and not as a function call (most likely going to be based on shifting on
x86/amd64 platforms in the general registers). Research and start Arm
Neon port.

Note: I know the objectives are large for near the end of the program,
but I plan to volunteer on the mono project in these areas after the
GSoC ends.