162 AMCC Proprietary
Revision 1.02 - September 10, 2007
PPC405 Processor
addc
Add Carrying
Preliminary User’s Manual
addc
Add Carrying
(RT) ← (RA) + (RB)
if (RA) + (RB) 2
32
– 1 then
XER[CA]
← 1
else
XER[CA]
← 0
The sum of the contents of register RA and register RB 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]
LT, GT, EQ, SO
if Rc contains 1
• XER[SO, OV] if OE contains 1
Architecture Note
This instruction is part of the PowerPC User Instruction Set Architecture.
addc RT, RA, RB OE= 0, Rc= 0
addc. RT, RA, RB OE= 0, Rc= 1
addco RT, RA, RB OE= 1, Rc= 0
addco. RT, RA, RB OE= 1, Rc= 1
31 RT RA RB OE 10 Rc
0 6 11 16 21 22 31
>
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