Module gpr 

MIPS general-purpose register indices, by their ABI names.

Lives here rather than beside any one caller so the numbering is stated once: a second private copy elsewhere is how $t3 and $t4 eventually swap in one of them. Only the names currently needed are defined — this is a shared vocabulary, not an exhaustive table for its own sake.

Constants

A2

$a2 — argument 2.

A3

$a3 — argument 3.

AT

$at — assembler temporary.

RA

$ra — return address.

S3

$s3 — saved 3.

S4

$s4 — saved 4.

S5

$s5 — saved 5.

S6

$s6 — saved 6.

S7

$s7 — saved 7.

SP

$sp — stack pointer.

T0

$t0 — temporary 0.

T2

$t2 — temporary 2.

T3

$t3 — temporary 3.