MULMOD/ADDMOD implemented in separate functions [FIXES #80566276]
MULMOD/ADDMOD implemented in separate functions [FIXES #80566276]

ethers/solidity,chriseth/solidity,chriseth/solidity-doc-test,LianaHus/solidity,vaporry/solidity,douglas-larocca/solidity,ruchevits/solidity,shahankhatch/solidity,arkpar/solidity,debris/solidity,gluk256/solidity,ruchevits/solidity,ruchevits/solidity,ruchevits/solidity