Place parameters in a place where the procedure can access them.
-
First save the "unsaved" registers if we will still care about them after procedure returns
($t0, ..., $t9, $a0, ..., $a3).Where do they get saved? the Stack (we'll talk about this in a minute)
- Place the parameters in the "argument" registers
(
$a0, ..., $a3)
Transfer control to the procedure.
- The Jump And Link instruction
(
jal ProcedureAddress) does 2 things:- Store return location (address of next instruction
after jump) in
$ra. (Happens automatically.) - Jump to the specified address.
- Store return location (address of next instruction
after jump) in