Nintendo 64 CPU register reference

@Nintendo64

Published in 

N64 various

 · 5 years ago

GP registers

 
Number	Name	    Preserved by    Description 
0	$zero	    --------        Hardwired to zero 
1	$at	    caller          Assembler temporary (used for pseudo-ops) 
2, 3	$v0, $v1    caller          Function return values 
4-7	$a0-$a3	    caller          Function arguments 
8-15	$t0-$t7	    caller          Temporaries 
16-23	$s0-$s7	    callee          Saved temporaries 
24, 25	$t8, $t9    caller          Temporaries 
26, 27	$k0, $k1    --------        Reserved for kernel 
28	$gp	    callee          Global pointer 
29	$sp	    callee          Stack pointer 
30	$fp or $s8  callee          Frame pointer or saved temporary 
31	$ra	    callee          Return address