This content has not been validated; it was AI-generated following the x86-64 ISA Documentation generation process to maintain high quality. However, as no human has verified this data, errors may exist. If the accuracy of this data is critical, please consult the Intel SDM. The model used to generate this is gemma4:31b
POR
Performs a bitwise OR operation between the source operand and the destination operand, storing the result in the destination operand.
The following table covers what the source and destinations can be:
| source | destination(s) |
|---|---|
| reg | reg |
| imm | reg |
| reg | mN |
| imm | mN |
Support LOCK
The instruction is supported in 64-bit mode and compatibility mode. In 64-bit mode, the operand size may be 8, 16, 32, or 64 bits.
The destination operand MUST NOT be the same as the source operand when utilizing a memory reference to avoid potential aliasing issues, although the ISA allows it. When the destination is a memory location, the operation is performed on the memory content and the result is written back to that same location.