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Instruction Set 9-175
stwx
Store Word Indexed
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
Architecture Note
This instruction is part of the PowerPC User Instruction Set Architecture.
stwx RS, RA, RB
31 RS RA RB 151
0 6 11 16 21 31