i#1551 port to ARM: implement XINST_CREATE_ macros

Puts in place the proper implementation of the existing XINST_CREATE_
macros for ARM, including OP_mvn vs OP_movw for XINST_CREATE_load_int().
Adds instr_create_1dst_4src() which is needed for XINST_CREATE_add().

git-svn-id: https://dynamorio.googlecode.com/svn/trunk@3002 49cc7528-f6fd-11dd-9d1a-b59b2e1864b6
4 files changed