* must use a truncating float-to-int conversion, for example.
* introduce optimized variants of the single value psq_st operation (JIT only).
* fix bug in SafeWriteRegToReg when swap = false
git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@4861 8ced0084-cf51-0410-be5f-012b33b47a6e