a SILabs/Keil example

//SF_XBR0 =               (0  + SM_XBR0_CP0E + SM_XBR0_ECI0E + SM_XBR0_PCArte + SM_XBR0_UARTEN + SM_XBR0_SPI0EN + SM_XBR0_SMB0EN);
           mov   SF_XBR0,#(0                                                  + SM_XBR0_UARTEN                  + SM_XBR0_SMB0EN);

there is no doubt which bits are (re)set

now tell me that you can immediately spot what the name of the bits are in
XBR0 = 11011001B
and I'll be impressed

Erik