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stwx
Store Word Indexed
PPC440x5 CPU Core User’s Manual Preliminary
Page 428 of 589
instrset.fm.
September 12, 2002
stwx
Store Word Indexed
EA ← (RA|0) + (RB)
MS(EA,4)
← (RS)
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.
If instruction bit 31 contains 1, the contents of CR[CR0] are undefined.
Registers Altered
• None
Invalid Instruction Forms
• Reserved fields
stwx RS, RA, RB
31 RS RA RB 151
0 6 11 16 21 31