GY-63_MS5611/libraries/IEEE754tools/readme.md
2021-12-20 08:09:14 +01:00

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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.
  • link to float16 in documentation

Operations

See examples