Load Word and Zero with Update (LWZU/lwzu) D-form

lwzu RT,D(RA)

33 RT RA D
0 6 11 16 31

EA <--  (RA) + EXTS(D)
RT <-- 320 || MEM(EA, 4)
RA <-- EA

Let the effective address (EA) be the sum (RA)+ D. The
word in storage addressed by EA is loaded into
RT32:63. RT0:31 are set to 0.
EA is placed into register RA.
If RA=0 or RA=RT, the instruction form is invalid.
Special Registers