The fields of a given procedure invocation context can be
    updated with new register contents by using this function.

    Format
      LIB$X86_PUT_INVO_REGISTERS (invo_handle, invo_context
      [,gr_mask] [,xmm_mask] [,ymm_mask] [,zmm_mask] [,apr_mask]
      [,misc_mask])

    Note that if user override routines are specified in the
    invocation context block, then they are used to find and modify
    the invocation context.