Addme - IBM PPC440X5 CPU Core User Manual

addme

Add to Minus One Extended
PPC440x5 CPU Core User's Manual
addme
Add to Minus One Extended
addme RT, RA
addme. RT, RA
addmeo RT, RA
addmeo. RT, RA
31
0 6
(RT) (RA) + XER[CA] + (–1)
if (RA) + XER[CA] + 0xFFFF FFFF
XER[CA] 1
else
XER[CA] 0
The sum of the contents of register RA, XER[CA], and –1 is placed into register RT.
XER[CA] is set to a value determined by the unsigned magnitude of the result of the add operation.
Registers Altered
• RT
• XER[CA]
• CR[CR0] if Rc contains 1
• XER[SO, OV] if OE contains 1
Invalid Instruction Forms
• Reserved fields
Page 262 of 589
OE= 0, Rc= 0
OE= 0, Rc= 1
OE=1, Rc= 0
OE =1, Rc=1
RT RA
11
32
u
2 – 1 then
>
OE
16 21 22
Preliminary
234 Rc
31
instrset.fm.
September 12, 2002