Sthx - IBM PPC440X5 CPU Core User Manual

Preliminary

sthx

Store Halfword Indexed
sthx RS, RA, RB
31
0 6
EA (RA|0) + (RB)
MS(EA, 2) (RS)
16:31
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 halfword of register RS is stored into the halfword at the EA.
If instruction bit 31 contains 1, the contents of CR[CR0] are undefined.
Registers Altered
• None
Invalid Instruction Forms
• Reserved fields
instrset.fm.
September 12, 2002
RS RA
11
PPC440x5 CPU Core User's Manual
RB
16 21
sthx
Store Halfword Indexed
407
31
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