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INCSSPQ

Increments the unsigned quadword value at the specified destination by one.

The following table covers what the source and destinations can be:

DO NOT support LOCK

This instruction is available only in 64-bit mode. It is NOT supported in compatibility mode.

The instruction does not affect any EFLAGS bits. Because it does not update the flags, it cannot be used as a basis for conditional branching.

If the destination is a memory operand, the operation is not atomic unless specifically handled by the memory model; however, since the LOCK prefix is not supported for this specific mnemonic, concurrent access to the same memory location by multiple processors may lead to race conditions.