Arduino library to manipulate IEEE754 float numbers fast.
IEEE754tools.h contains a collection of experimental bit-hacks to speed up a number of operations on floating point numbers on the Arduino UNO. These bit-hacks started in 2010 (oldest code found), maybe even earlier.
- http://en.wikipedia.org/wiki/Double_precision
- http://en.wikipedia.org/wiki/Single-precision_floating-point_format
- https://github.com/RobTillaart/float16
- https://github.com/RobTillaart/printHelpers (to print scientific format float).
- do not use this lib for production code unless you verified the correctness. Code is experimental, so use with care at your own risk.
- If you don't need micro-second speed ups do not use these code snippets.
- do not use for ESP32 ESP32 does things differently ==> not all code works.
updated for 0.2.2
| example | UNO | ESP32 |
|---|---|---|
| fastNegate | Y | Y |
| float2Double | Y | N |
| IEEE754_equal | Y | N |
ESP32 - needs investigation as UNO verified code fails. (something for a long winter)
#include "IEEE754tools.h"See .h file for details.
See examples
- improve documentation
- test with double
- test on ESP23
- investigate other speed ups
- bring more structure in this library
- write more examples
- example binary transfer over Serial
- example binary transfer over Ethernet
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