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KORTESTW
Performs a logical AND between the source and destination operands without storing the result. The ZF flag is set if the result of the logical AND is zero, and cleared otherwise.
The following table describes the supported source and destination operands:
| source | destination(s) |
|---|---|
| reg | reg |
| memory | reg |
| imm | reg |
DO NOT support LOCK
This instruction is only available in compatibility mode. It is used to test a word-sized value in a register against another word-sized value.
The operands MUST be 16-bit. Using this instruction with 32-bit or 64-bit registers will result in an invalid operation or unintended behavior depending on the operand size override prefix. Ensure that the destination register is specifically r16 to avoid size mismatches.