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stwux
Store Word with Update Indexed
Preliminary PPC440x5 CPU Core User’s Manual
instrset.fm.
September 12, 2002 Page 427 of 589
stwux
Store Word with Update Indexed
EA ← (RA|0) + (RB)
MS(EA, 4)
← (RS)
(RA)
← EA
An effective address (EA) is formed by adding an index to a base address. The index is the contents of
register RB. The base address is 0 when the RA field is 0, and is the contents of register RA otherwise.
The contents of register RS are stored into the word at the EA.
The EA is placed into register RA.
If instruction bit 31 contains 1, the contents of CR[CR0] are undefined.
Registers Altered
•RA
Invalid Instruction Forms
• Reserved fields
• RA = 0
stwux RS, RA, RB
31 RS RA RB 183
0 6 11 16 21 31