RAL set() method followed by update() method modify all 32 bits of a 32 bit register!

[superUVM]

I am using set() method to set desired bit of RW register. I am expecting desired bit to get updated while rest of the bits remain unaffected. The desired bit is set while other bits of register are Zeroed out.

e.g. reg_name.field_name.set('1b1); // this is a 32 bit register
reg_name.update();

Can I use set() method to change individual bit of a register followed update() method to write to hardware?
RAL set() method followed by update() method modify all 32 bits of a 32 bit register!
Do I need read-modify-write or RAL automatically takes care of this?

Thanks

[dave_59]

Advantage of calling set() over write()

Simulation performance may be improved with set()/update() when The current mirrored value is the same as the desired given by set(). Then no bus transactions happens. you want to write to multiple fields of a register that are not individually selectable. Writing to multiple fields of register creates multiple read/modify/write transactions. You can use set() to the individual fields and then update then entire register. Normally you would just apply set() any field/register in the entire re…