Hello, Just my two cents here.
On Wed, Oct 31, 2018 at 12:34 PM Bernhard Reutner-Fischer <rep.dot....@gmail.com> wrote: > > > > > 64-bit double's mantissa is only 53 bits... > > > > With "long double" shenanigans, I managed to "improve" this to: > > > > $ ./busybox printf "%f\n" 18446744073709550592 18446744073709553665 > > 18446744073709550591.500000 > > 18446744073709553663.500000 > > > > at this cost: > > > > function old new delta > > printf_main 909 976 +67 > > strtold - 19 +19 > > print_direc 457 475 +18 > > conv_strtod 54 61 +7 > > ------------------------------------------------------------------------------ > > (add/remove: 3/0 grow/shrink: 3/0 up/down: 130/0) Total: 111 > > bytes > > > > See attached. Do you think it's worth it? > > I don't know. > long double can be very slow (emulated) and complex to support, which > might not be of concern here though. > But first and foremost nobody complained yet AFAIK. > Maybe keep it as is? Actively reject values too large for plain double > in printf(1) for now? > dunno. Maybe hide the float/double/long double behind a config ? Some people may want printf to support long values, while some other (like me) does not need it. Best regards, -- Emmanuel Deloget _______________________________________________ busybox mailing list busybox@busybox.net http://lists.busybox.net/mailman/listinfo/busybox
