So, there is MVIY, MVHHI, MVHI, and MVGHI for moving either a 1-byte or
2-byte immediate to 1, 2, 4, or 8 byte(s) of storage, respectively.

I want to *add* a 2-byte immediate to a 2-byte storage location.  I see
ALSI and ALGSI for 4 and 8 bytes.  But I don't see anything indicating the
storing of 2 bytes.  Have I missed something to do this in a single
instruction?

Thanks,
Dave Clark

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