Lhau - IBM PPC440X5 CPU Core User Manual

lhau

Load Halfword Algebraic with Update
PPC440x5 CPU Core User's Manual
lhau
Load Halfword Algebraic with Update
lhau RT, D(RA)
43
0 6
EA (RA|0) + EXTS(D)
(RA) EA
(RT) EXTS(MS(EA,2))
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 EA is placed into register RA.
The halfword at the EA is sign-extended to 32 bits and placed into register RT.
Registers Altered
• RA
• RT
Invalid Instruction Forms
• RA = RT
• RA = 0
Page 326 of 589
RT RA
11 16
Preliminary
D
instrset.fm.
September 12, 2002
31