On 22.07.19 14:49, drug wrote:
I have almost identical (I believe it at least) implementation (D and
C++) of the same algorithm that uses Kalman filtering. These
implementations though show different results (least significant
digits). Before I start investigating I would like to ask if this issue
(different results of floating points calculation for D and C++) is well
known? May be I can read something about that in web? Does D
implementation of floating point types is different than the one of C++?
Most of all I'm interesting in equal results to ease comparing outputs
of both implementations between each other. The accuracy itself is
enough in my case, but this difference is annoying in some cases.
This is probably not your problem, but it may be good to know anyway: D
allows compilers to perform arbitrary "enhancement" of floating-point
precision for parts of the computation, including those performed at
compile time. I think this is stupid, but I haven't been able to
convince Walter.
