Power ISA™ Version 2.03 - Power.org

Version 2.03
Store Halfword
D-form
Store Halfword Indexed
X-form
sth
RS,D(RA)
sthx
RS,RA,RB
44 RS RA D
0 6 11 16 31
if RA = 0 then b 0
else
b (RA)
EA b + EXTS(D)
MEM(EA, 2) (RS) 48:63
Let the effective address (EA) be the sum (RA|0)+ D.
(RS) 48:63 are stored into the halfword in storage
addressed by EA.
Special Registers Altered:
None
31 RS RA RB 407 /
0 6 11 16 21 31
if RA = 0 then b 0
else
b (RA)
EA b + (RB)
MEM(EA, 2) (RS) 48:63
Let the effective address (EA) be the sum
(RA|0)+ (RB). (RS) 48:63 are stored into the halfword in
storage addressed by EA.
Special Registers Altered:
None
Store Halfword with Update D-form Store Halfword with Update Indexed
X-form
sthu RS,D(RA)
sthux RS,RA,RB
45 RS RA D
0 6 11 16 31 31 RS RA RB 439 /
EA (RA) + EXTS(D)
MEM(EA, 2) (RS) 48:63
RA EA
Let the effective address (EA) be the sum (RA)+ D.
(RS) 48:63 are stored into the halfword in storage
addressed by EA.
EA is placed into register RA.
If RA=0, the instruction form is invalid.
Special Registers Altered:
None
0 6 11 16 21 31
EA (RA) + (RB)
MEM(EA, 2) (RS) 48:63
RA EA
Let the effective address (EA) be the sum (RA)+ (RB).
(RS) 48:63 are stored into the halfword in storage
addressed by EA.
EA is placed into register RA.
If RA=0, the instruction form is invalid.
Special Registers Altered:
None
46
Power ISA -- Book I