>   I've been doing a lot of meddling with 16-bit numbers as
>part of my battery charger project. I seem to recall that a
>number of years ago, I had a copy of a program that took an
>expression (along the lines of "x < 5") and generated the
>code to perform that comparison. ISTR it also had support
>for 8- and 16-bit comparisons.

As an addition to the other answers received, have a look at the macros Olin
has in his development environment.

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