Add test for fast-return + flag preservation. Patch by James Cowgill.
Change flag registers for MIPS.
Rework win32 stack touch on x86.
Add hw division and windows support to ARM-Thumb2.
Rework win32 stack touch on ARM-64.
Use GCC types on Windows when available. Patch by Martin Storsjo.
Use sp directly and rework function entry/exit on ARM-64. Based on patches by Martin Storsjo.
Support integer division on Thumb2-windows. Patch by Martin Storsjo.