Stbx - IBM PPC440X5 CPU Core User Manual

stbx

Store Byte Indexed
PPC440x5 CPU Core User's Manual
stbx
Store Byte Indexed
stbx RS, RA, RB
31
0 6
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
Page 412 of 589
RS RA
11
RB
16 21
Preliminary
215
31
instrset.fm.
September 12, 2002