A couple of years back, I did a little (LITTLE! Very superficial!) research into doing BCD on x86, and if my very fuzzy memory of that time is not totally wrong, the BCD support in x86 was never all that great. Certainly nowhere near the support for arithmetic on fixed-sized binary integers. Also, being mostly unused, Intel had little incentive to to make these instructions run fast.
So there might be programs somewhere that actually use these instructions, but I would not be surprised if there also were programs that do BCD arithmetic without using the x86 BCD instructions. (Especially if these were written in in a HLL, compiled by a compiler that has no idea what you are trying to do.)
So there might be programs somewhere that actually use these instructions, but I would not be surprised if there also were programs that do BCD arithmetic without using the x86 BCD instructions. (Especially if these were written in in a HLL, compiled by a compiler that has no idea what you are trying to do.)