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stbx
Store Byte Indexed
PPC440x5 CPU Core User’s Manual Preliminary
Page 412 of 589
instrset.fm.
September 12, 2002
stbx
Store Byte Indexed
EA ← (RA|0) + (RB)
MS(EA, 1)
← (RS)
24:31
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 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
• None
Invalid Instruction Forms
• Reserved fields
stbx RS, RA, RB
31 RS RA RB 215
0 6 11 16 21 31