Re: Bit swizzling

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From	"Rick C. Hodgin" <rick.c.hodgin@gmail.com>
Newsgroups	comp.compilers
Subject	Re: Bit swizzling
Date	Thu, 10 Sep 2020 17:13:24 -0400
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On 9/10/20 1:34 PM, gah4 wrote:
> On Saturday, September 5, 2020 at 9:45:43 AM UTC-7, Rick C. Hodgin wrote:
>> Are there any algorithms which take a known-at-compile-time sequence
>> of bitwise operations on an 8-bit to 64-bit quantity, and optimize
>> them down to their minimal set of operations? ...

> There is a lot of work, and many algorithms, for logic optimization,
> or minimization, that, for example, will find the optimal combination
> of NAND and NOR gates to evaluate some logical operation. ...

I have a preliminary algorithm that works, but it's still not fully
optimized and is a little clunky.

I want a way to abstract the logic and work with it there.

I haven't put in any additional time on this algorithm yet, due to
some life things happening.  But I plan to come back to it.

--
Rick C. Hodgin

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Bit swizzling "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2020-09-05 12:05 -0400
  Re: Bit swizzling Hans-Peter Diettrich <DrDiettrich1@netscape.net> - 2020-09-05 19:38 +0200
  Re: Bit Swizzling "John Levine" <johnl@taugh.com> - 2020-09-05 18:50 +0000
    Re: Bit Swizzling Chris <xxx.syseng.yyy@gfsys.co.uk> - 2020-09-06 17:48 +0100
  Re: Bit swizzling Kaz Kylheku <793-849-0957@kylheku.com> - 2020-09-05 20:15 +0000
  Re: Bit swizzling "davidl...@gmail.com" <davidlovemore@gmail.com> - 2020-09-06 00:31 -0700
  Re: Bit swizzling Martin Ward <martin@gkc.org.uk> - 2020-09-07 12:08 +0100
    Re: Bit swizzling Tom Crick <tomcrick@gmail.com> - 2020-09-08 09:35 +0100
  Re: Bit swizzling "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2020-09-07 10:55 -0400
    Re: Bit swizzling Hans-Peter Diettrich <DrDiettrich1@netscape.net> - 2020-09-08 01:45 +0200
  Re: Bit swizzling gah4 <gah4@u.washington.edu> - 2020-09-10 10:34 -0700
    Re: Bit swizzling "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2020-09-10 17:13 -0400

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