Nintendo Ultra64 Programmer's Manual page 186

Operation:

T:
Addr ((offset
for i in 0...7
endfor
Exceptions:
None
186
16
) || offset
15 15...0
Addr = Addr + i * 2
 (0 1
VR[vt][i*2] || dmem[Addr
15...0
) + GPR[base]
7
] || 0 )
11...0 7...0