[TUHS] Discuss of style and design of computer programs from a

Michael Kjörling michael at kjorling.se
Sun May 7 01:51:24 AEST 2017


On 6 May 2017 08:24 -0700, from lm at mcvoy.com (Larry McVoy):
>> I would absolutely not say that doing something like that is standard
>> practice in modern programming. Even in microcontrollers, where
>> program and data memory can be scarce even today, I would argue that
>> the costs would not outweigh the benefits by a long shot.
> 
> It strikes as being similar to Duff's device (1).  Which is a niche thing
> but I still use that from time to time.  Not to save memory, just because
> as a C programmer it seems pretty natural to do it.
> 
> --lm
> 
> (1) https://en.wikipedia.org/wiki/Duff's_device

I disagree; loop unrolling and jumping to the beginning of some
instruction inside that unrolled loop is not at all the same thing as
jumping _into the middle of a machine language instruction_.

-- 
Michael Kjörling • https://michael.kjorling.semichael at kjorling.se
                 “People who think they know everything really annoy
                 those of us who know we don’t.” (Bjarne Stroustrup)


More information about the TUHS mailing list