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Instruction Set 9-157
stbu
Store Byte with Update
stbu
Store Byte with Update
EA ← (RA) + EXTS(D)
MS(EA, 1)
← (RS)
24:31
(RA) ← EA
An effective address (EA) is formed by adding a displacement to the base address in register RA. The
displacement is obtained by sign-extending the 16-bit D field to 32 bits. The EA is placed into register
RA.
The least significant byte of register RS is stored into the byte at the EA.
Registers Altered
•RA
Invalid Instruction Forms
RA = 0
Architecture Note
This instruction is part of the PowerPC User Instruction Set Architecture.
stbu RS, D(RA)
39 RS RA D
0 6 11 16 31