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Re: the unsigned right shift operator in CL >>>

From Stefan Monnier <monnier@iro.umontreal.ca>
Newsgroups comp.lang.lisp
Subject Re: the unsigned right shift operator in CL >>>
Date 2026-03-12 16:34 -0400
Organization A noiseless patient Spider
Message-ID <jwvqzpopza8.fsf-monnier+comp.lang.lisp@gnu.org> (permalink)
References (2 earlier) <86tszy392o.fsf@williamsburg.bawden.org> <87jz0utvlt.fsf@parhasard.net> <m3sef9yj49.fsf@pison.robolove.meer.net> <86plac3j8e.fsf@williamsburg.bawden.org> <20260312103158.948@kylheku.com>

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> So I'm looking for the logtrunc function and it's not there!

Do you mean something like:

    (defun logtrunc (n bits)
      (mod n (ash 1 bits)))

aka

    (defun logtrunc (n bits)
      (logand n (1- (ash 1 bits))))

?


=== Stefan

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Thread

the unsigned right shift operator in CL >>> Madhu <enometh@meer.net> - 2025-10-15 12:34 +0530
  Re: the unsigned right shift operator in CL >>> Aidan Kehoe <kehoea@parhasard.net> - 2025-10-16 19:04 +0100
    Re: the unsigned right shift operator in CL >>> Alan Bawden <alan@csail.mit.edu> - 2025-10-16 16:06 -0400
      Re: the unsigned right shift operator in CL >>> Aidan Kehoe <kehoea@parhasard.net> - 2025-10-16 21:55 +0100
        Re: the unsigned right shift operator in CL >>> Madhu <enometh@meer.net> - 2025-10-23 16:34 +0530
          Re: the unsigned right shift operator in CL >>> Alan Bawden <alan@csail.mit.edu> - 2025-10-24 02:29 -0400
            Re: the unsigned right shift operator in CL >>> Madhu <enometh@meer.net> - 2025-10-25 21:00 +0530
            Re: the unsigned right shift operator in CL >>> Kaz Kylheku <046-301-5902@kylheku.com> - 2026-03-12 18:00 +0000
              Re: the unsigned right shift operator in CL >>> Stefan Monnier <monnier@iro.umontreal.ca> - 2026-03-12 16:34 -0400
                Re: the unsigned right shift operator in CL >>> Kaz Kylheku <046-301-5902@kylheku.com> - 2026-03-16 20:14 +0000
  Re: the unsigned right shift operator in CL >>> Madhu <enometh@meer.net> - 2025-10-23 16:38 +0530

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