Performs an addition with carry of the contents of a general-purpose register and an immediate value.
| PowerPC | |
|---|---|
| addic. | RT,RA,SI |
| POWER | |
|---|---|
| ai. | RT,RA,SI |
See "Extended Mnemonics of Fixed-Point Arithmetic Instructions" for more information.
The addic. and ai. instructions place the sum of the contents of general-purpose register (GPR) RA and a 16-bit signed integer, SI, into the target GPR RT.
The 16-bit integer SI provided as immediate data is sign-extended to 32 bits prior to carrying out the addition operation.
The addic. and ai. instructions have one syntax form and can set the Carry Bit of the Fixed-Point Exception Register. These instructions also affect Condition Register Field 0.
| RT | Specifies target general-purpose register where result of operation is stored. |
| RA | Specifies source general-purpose register for operation. |
| SI | Specifies 16-bit signed integer for operation. |
The following code adds a 16-bit signed integer to the contents of GPR 4, stores the result in GPR 6, and sets the Fixed-Point Exception Register Carry bit and Condition Register Field 0 to reflect the result of the operation:
# Assume GPR 4 contains 0xEFFF FFFF. addic. 6,4,0x1000 # GPR 6 now contains 0xF000 0FFF.
Fixed-Point Arithmetic Instructions.