invo_context OpenVMS usage: invo_context_blk type: structure access: read mechanism: by reference Address of a valid invocation context block. index OpenVMS usage: index type: longword access: read mechanism: by value Index into the register array of the XSAVE area pointed to from the invocation context block. ymm_copy OpenVMS usage: SSE register contents type: 32 bytes access: write mechanism: by reference Address of a 32-byte buffer to receive the contents of the specified register.