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* First draft of 256-bit addition. * Update comment. * cargo fmt * Rename addition evaluation file. * Port ALU logic from SZ. * Give a name to some magic numbers. * `addition.rs` -> `add.rs`; fix carry propagation in add; impl sub. * Clippy. * Combine hi and lo parts of the output. * Implement MUL. * Suppress Clippy's attempt to make my code even harder to read. * Next draft of MUL. * Make all limbs (i.e. input and output) 16-bits. * Tidying. * Use iterators instead of building arrays. * Documentation. * Clippy is wrong; also cargo fmt. * Un-refactor equality checking, since it was wrong for sub. * Daniel comments. * Daniel comments. * Rename folder 'alu' -> 'arithmetic'. * Rename file. * Finish changing name ALU -> Arithmetic Unit. * Finish removing dependency on array_zip feature. * Remove operations that will be handled elsewhere. * Rename var; tidy up. * Clean up columns; mark places where range-checks need to be done. * Import all names in 'columns' to reduce verbiage. * cargo fmt * Fix aux_in calculation in mul. * Remove redundant 'allow's; more precise range-check size. * Document functions. * Document MUL instruction verification technique. * Initial tests for ADD. * Minor test fixes; add test for SUB. * Fix bugs in generate functions. * Fix SUB verification; refactor equality verification. * cargo fmt * Add test for MUL and fix some bugs. * Update doc. * Quiet incorrect clippy error. * Clean up 'decode.rs'. * Fold 'decode.rs' into 'arithmetic_stark.rs'. * Force limb size to divide EVM register size. * Document range-check warning and fix end value calc. * Convert `debug_assert!`s into `assert!`s. * Clean up various kinds of iterator usage. * Remove unnecessary type spec. * Document unexpected use of `collect`.