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Instruction Set 9-173
stwu
Store Word with Update
stwu
Store Word with Update
EA ← (RA) + EXTS(D)
MS(EA, 4)
← (RS)
(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 contents of register RS are stored into the word at the EA.
Registers Altered
•RA
Invalid Instruction Forms
• RA = 0
Architecture Note
This instruction is part of the PowerPC User Instruction Set Architecture.
stwu RS, D(RA)
37 RS RA D
0 6 11 16 31