NI_GPCT_INDEX_PHASE_BITSHIFT
bits |= GI_INDEX_PHASE((mode >> NI_GPCT_INDEX_PHASE_BITSHIFT));
NI_GPCT_INDEX_PHASE_MASK = 0x3 << NI_GPCT_INDEX_PHASE_BITSHIFT,
0x0 << NI_GPCT_INDEX_PHASE_BITSHIFT,
0x1 << NI_GPCT_INDEX_PHASE_BITSHIFT,
0x2 << NI_GPCT_INDEX_PHASE_BITSHIFT,
0x3 << NI_GPCT_INDEX_PHASE_BITSHIFT,