On Tue, Feb 1, 2022 at 3:59 AM Peter Rosin <peda@xxxxxxxxxx> wrote: > On 2022-01-31 16:23, Andy Shevchenko wrote: > > On Mon, Jan 31, 2022 at 4:50 PM Peter Rosin <peda@xxxxxxxxxx> wrote: > >> On 2022-01-30 17:10, Liam Beguin wrote: > > > > ... > > > >>> - tmp = div_s64_rem(tmp, 1000000000LL, &rem); > >>> + tmp = div_s64_rem(tmp, GIGA, &rem); > >> > >> It is NOT easy for me to say which of GIGA/NANO is most fitting. > > > > What do you mean? The idea behind is the use of the macro depending on > > the actual power of 10 in use (taking into account the sign of the > > exponent part). > > > >> There are a couple of considerations: > >> > >> A) 1000000000 is just a big value (GIGA fits). Something big is > >> needed to not lose too much precision. > > > > Does it have a physical meaning? > > No, this is just a scaling factor which is moments later > eliminted by a matching inverse operation. It's math purely > about attempting to preserve precision and has nothing to do > with the units of the values that are involved. I see your point now, shame on me. -- With Best Regards, Andy Shevchenko
