Stwux - IBM PPC440X5 CPU Core User Manual

Preliminary

stwux

Store Word with Update Indexed
stwux RS, RA, RB
31
0 6
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
instrset.fm.
September 12, 2002
RS RA
11
PPC440x5 CPU Core User's Manual
RB
16 21
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Store Word with Update Indexed
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