Copy the low-order 32 bits of a general purpose register into another general purpose register, and sign extend the fullword to a double-word in size (64 bits).
| PowerPC | |
|---|---|
| extsw | RA, RS (Rc=0) |
| extsw. | RA, RS (Rc=1) |
The contents of the low-order 32 bits of general purpose register (GPR) RS are placed into the low-order 32 bits of GPR RA. Bit 32 of GPR RS is used to fill the high-order 32 bits of GPR RA.
Other registers altered:
Condition Register (CR0 field):
Affected: LT, GT, EQ, SO (if Rc = 1)
XER:
Affected: CA
| RA | Specifies the target general purpose register for the result of the operation. |
| RS | Specifies the source general purpose register for the operand of instruction. |
This instruction is defined only for 64-bit implementations. Using it on a 32-bit implementation will cause the system illegal instruction error handler to be invoked.