[PATCH kvm-unit-tests 2/5] x86: test xadd with two identical operands

Previously, KVM emulated xadd incorrectly when the source and destination operands were identical. The expected result is that the register would hold the sum (2x) and not the previous value (x). This test checks this behavior. It should be executed with a disabled unrestricted mode.

[PATCH kvm-unit-tests 2/5] x86: test xadd with two identical operands

Previously, KVM emulated xadd incorrectly when the source and destination operands were identical. The expected result is that the register would hold the sum (2x) and not the previous value (x). This test checks this behavior. It should be executed with a disabled unrestricted mode.