There are 32 registers in MIPS.
In Register File
Value Storage
$t0 - $t9: temporaries$s0 - $s9: saved temporaries
Special
$zero: will always hold 0. All writes will be discarded$at: reserved for the assembler$gp: global pointer$sp: stack pointer$fp: frame pointer (like Base Pointer)$ra: return address$k0, $k1: reserved for the Kernel
Function Parameters
$v0, $v1: return values$a0 - $a3: function arguments
Not in Register File
$PC: Program Counter Register **-$HI, $LO: remainder and quotient respectively for division