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Proof of concept of basic math operation with Solidity

License: MIT License

JavaScript 100.00%

solidity-float-point-calculation's Introduction

Floating point math library

Brought to you by Bankex Foundation

WIP, not ready for production

Fuctionality

Float point number is represented in a binary256 IEEE standard (so library operates on bytes32 and uint256[3] internally).

Included functions:

  • add
  • sub
  • mul
  • div (naive implementation, slow)
  • log2
  • fast inverse sqrt
  • fast div (using fast inverse sqrt)

Planned functions:

  • exp

Known issues:

  • Non-normalized numbers are not properly represented
  • Overflow is not processed

What's inside

Crude core for library and set of tests, including helper functions to encode BigNumber into bytes32. Library is in a form of contract for ease of compilation in deployment (see Tester.sol for example).

How to run

npm install
npm test

tests.js is a set of helper and test functions.

Contributors

solidity-float-point-calculation's People

Contributors

skywinder avatar

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