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feat(brillig): Support integers which fit inside a FieldElement
#403
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Description
Problem*
Brillig was limited to 128 bits for integer operations, which prevent to use brillig to replace the quotient directive (which itself replace the truncate directive which requires more than 128 bits)
Related to noir-lang/noir#1766
Summary*
We convert field elements to big integers and perform the operations on the big integers, using the provided bit size
Additional Context
PR Checklist*
cargo fmt
on default settings.