BCD calculators

[Claudio L.]

(11-04-2020 04:22 PM)Wes Loewer Wrote:  

(11-04-2020 04:01 PM)Claudio L. Wrote:  The HP Prime uses binary for HOME, and decimal for the CAS on an ARM

I think you have those reversed.

Yes I did. I stand corrected.

(11-05-2020 03:34 PM)firai Wrote:  By the way, Claudio, were you thinking of Intel's DFP library instead of decNumber? decNumber uses DPD, which is a compressed version of BCD. Intel's DFP library and .NET's decimal type use BID (or a variant of it for the latter), which as you said achieves decimal math without using the BCD coding scheme (particularly for the significand).

I was actually thinking of decNumber. The generic decNumber type uses a more generic encoding. I had forgotten that the IEEE 754-2008 decimal packed types are there too and do use DPD as you pointed out (I never used them myself, only decNumber so I overlooked that part of the library).