Register Saving Conventions

Caller-Saved Registers

These are registers that be pushed to the OS Stack before function call, because the callee will modify them.

1. Registers $t0-$t7 are caller saved
2. Registers $a0-$a3 are caller saved If you don’t care about these registers, then you dont need to push them.

Callee-Saved Registers

These are registers that are pushed to the OS Stack if the callee wants saved variables between calls.

1. Registers $s0-$s7 are saved temporaries