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lbzu
Load Byte and Zero with Update
PPC440x5 CPU Core User’s Manual Preliminary
Page 322 of 589
instrset.fm.
September 12, 2002
lbzu
Load Byte and Zero with Update
EA ← (RA|0) + EXTS(D)
(RA)
← EA
(RT)
←
24
0 || MS(EA,1)
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 byte at the EA is extended to 32 bits by concatenating 24 0-bits to its left. The result is placed into
register RT.
Registers Altered
•RA
•RT
Invalid Instruction Forms
• RA=RT
• RA=0
lbzu RT, D(RA)
35 RT RA D
0 6 11 16 31