feat: sdiv reduction to udiv #23
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… udiv/umod We use the same implementation as Bitwuzla, as evidenced by the following rewrite rules: - sdiv: https://github.com/bitwuzla/bitwuzla/blob/f229d64be7c4a8c6817332a41d0d2764dbdfbfe4/src/rewrite/rewrites_bv.cpp#L3168C30-L3168C42 - smod: https://github.com/bitwuzla/bitwuzla/blob/f229d64be7c4a8c6817332a41d0d2764dbdfbfe4/src/rewrite/rewrites_bv.cpp#L3282C30-L3282C39
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We reduce
sdivtoudivby case analysis on themsb.