Sth - IBM PPC440X5 CPU Core User Manual

Preliminary

sth

Store Halfword
sth RS, D(RA)
44
0 6
EA (RA|0) + EXTS(D)
MS(EA, 2) (RS)
16:31
An effective address (EA) is formed by adding a displacement to a base address. The displacement is
obtained by sign-extending the 16-bit D field to 32 bits. 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 in main storage.
Registers Altered
• None
instrset.fm.
September 12, 2002
RS RA
11
PPC440x5 CPU Core User's Manual
16
Store Halfword
D
Page 413 of 589
sth
31