#define SML_COL_MIX7(P1, P2, ALPHA) \
    (SmlColour)(((lookupFFxFF[(P1              ) >> 24][ALPHA ^ 0xFF] + lookupFFxFF[(P2              ) >> 24][ALPHA]) << 24) | \
                ((lookupFFxFF[(P1 & 0x00FF0000U) >> 16][ALPHA ^ 0xFF] + lookupFFxFF[(P2 & 0x00FF0000U) >> 16][ALPHA]) << 16) | \
                ((lookupFFxFF[(P1 & 0x0000FF00U) >>  8][ALPHA ^ 0xFF] + lookupFFxFF[(P2 & 0x0000FF00U) >>  8][ALPHA]) <<  8) | \
                ((lookupFFxFF[(P1 & 0x000000FFU)      ][ALPHA ^ 0xFF] + lookupFFxFF[(P2 & 0x000000FFU)      ][ALPHA])      ))

// func7 (6 as macro): 10000 cycles took 16.982989 s