adding a MIPS instruction with operands to GCC

[guru venky]

I am trying to add a mips instruction with operands to gcc. Basically
I want an instruction that acts as marker for a future instruction.

as an example,

if i want a marker for addi R1,constant (add immediate) instruction, i
would do something like

marker constant

to be emitted by gcc.

can anyone help me achieve this,

thanks,
 prasadh