IEEE754tools

Arduino library to manipulate IEEE754 float numbers fast.

Description

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

WARNING

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.

Test results examples

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)

Future

test with double
test on ESP23
investigate other speed ups
write more examples
example binary transfer over Serial
example binary transfer over Ethernet
bring more structure in this library.

Operations

See examples

2.1 KiB Raw Blame History