GY-63_MS5611/libraries/IEEE754tools

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.

Related

• 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).

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)

Interface

#include "IEEE754tools.h"

See .h file for details.

Operations

See examples

Future

Must

• improve documentation
• test with double
• test on ESP23

Should

• investigate other speed ups
• bring more structure in this library

Could

• write more examples
  • example binary transfer over Serial
  • example binary transfer over Ethernet

Wont

Support

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Thank you,