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9-158 PPC405 Core User’s Manual
stbux
Store Byte with Update Indexed
stbux
Store Byte with Update Indexed
EA ← (RA) + (RB)
MS(EA, 1)
← (RS)
24:31
(RA) ← EA
An effective address (EA) is formed by adding an index to the base address in register RA. The index
is the contents of register RB. The EA is placed into register RA.
The least significant byte of register RS is stored into the byte at the EA.
If instruction bit 31 contains 1, the contents of CR[CR0] are undefined.
Registers Altered
•RA
Invalid Instruction Forms
• Reserved fields
• RA = 0
Architecture Note
This instruction is part of the PowerPC User Instruction Set Architecture.
stbux RS, RA, RB
31 RS RA RB 247
0 6 11 16 21 31