micro-optimization (but definite) to VU EX phase caller
micro-optimization (but definite) to VU EX phase caller

mupen64plus/mupen64plus-rsp-cxd4,8l/rsp,8l/rsp,mupen64plus/mupen64plus-rsp-cxd4,8l/rsp,mupen64plus/mupen64plus-rsp-cxd4