fp64lib.org

fp64_to_decimalExp now returns the specified number of decimal digits instead of just “0”.

E.g., fp64_to_decimalExp(x,4,false,NULL) will return “0.000E0” instead of “0“.

With that change, behaviour is now consistent for all finite numbers, but it will be no longer consistent with the the previous 64-bit C-library avr_f64.c.

There were some small errors in the Double demo program, using the wrapper class. These were fixed with V1.1.23.

Based on some posts on various arduino platforms, it seems that especially programming beginners have had some difficulties in using fp64lib. In order to ease entry into fp64lib, the Examples section of the homepage was overhauled, existing examples were updated and new examples were added, including a wrapper class called Double.

Issues #16 (wrong value from fp64_log2) and #18 (wrong values from fp64_uint16_to_float64) were fixed.

With V1.2.20, fp64lib already implements 80 functions and it was time to give the users a little bit more structure on what is available. Therefore, the library references was made consistent in style, a table of contents for the more complex pages were introduced and a new page lists the functions by functional groups (like basic math, trigonometric functions, …). Hope this helps especially new users.

The following functions were added to improve coverage required for full math.h compatibility:

fp64_ilogb, fp64_logb, fp64_exp2, fp64_asinh, fp64_acosh, fp64_atanh, fp64_scalbln, fp64_scalbn

See the library reference for details on these functions.

Some bugs, especially in fp64_to_string and supporting functions were fixed to support programs >64kB, e.g. on the ATMEGA 2560.

fp64lib now supports programs that use more than 64kB of flash memory, e.g. on the ATMEGA 2560.

For some arguments, fp64_atan2 did not calculate correct results. This is fixed now.