If the input is a signaling NaN, then we need to signal that via setting the FPSCR.VXSNAN bit. We also shouldn't update the FPRF flags if FPSCR.VE is set.
If the input is a signaling NaN, then we need to signal that via setting the FPSCR.VXSNAN bit. We also shouldn't update the FPRF flags if FPSCR.VE is set.