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From: SugarBug <3883@sugar.bug>
Newsgroups: sci.crypt
Subject: Efficient dword bitwise rotate / circular shift using Bash shell ?
Date: Sat, 4 May 2024 09:24:12 -0500
Organization: Baggy Jeans Mafia (sybershock.com)
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Example:

rol() { num="$@" ; pre=$((num<<13)) ; suf=$((num>>19)) ;
        num=$((pre^suf)) ; num=$((num&0xffffffff)) ; echo "$num" ; }

What tricks will make this more efficient in Bash?

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