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From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: comp.arch
Subject: Re: Byte Addressability And Beyond
Date: Wed, 29 May 2024 04:46:34 -0000 (UTC)
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On Tue, 28 May 2024 16:02:10 -0000 (UTC), Thomas Koenig wrote:

> Lawrence D'Oliveiro <ldo@nz.invalid> schrieb:
>>
>> On Mon, 27 May 2024 19:09:51 -0000 (UTC), John Levine wrote:
>>
>>> According to EricP  <ThatWouldBeTelling@thevillage.com>:
>>>>
>>>> One could have instructions that make it easier to parse the variable
>>>> length UTF-8 sequences into codepoints.
>>> 
>>> That would be the CU14 instruction on zSeries, to turn UTF-8 into
>>> UTF-32. CU41 goes the other way.
>>
>> What is the point, in this day and age, of having special machine
>> instructions to convert character encodings?
> 
> Have you looked at decoding algorithms for UTF-8?

Of course. Isn’t the point of RISC that these complex operations are more 
efficiently performed by a sequence of simpler instructions?