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Load Word and Zero with Update
PPC440x5 CPU Core User’s Manual Preliminary
Page 342 of 589
instrset.fm.
September 12, 2002
lwzu
Load Word and Zero with Update
EA ← (RA|0) + EXTS(D)
(RA)
← EA
(RT)
← MS(EA,4)
An effective address (EA) is formed by adding a displacement to a base address. The displacement is
obtained by sign-extending the 16-bit D field to 32 bits. The base address is 0 if the RA field is 0 and is the
contents of register RA otherwise. The EA is placed into register RA.
The word at the EA is placed into register RT.
Registers Altered
•RA
•RT
Invalid Instruction Forms
•RA=RT
•RA=0
lwzu RT, D(RA)
33 RT RA D
0 6 11 16 31