Groups > linux.debian.ports.powerpc > #11108

Re: Delay slot in PowerISA?

From	Felix Lechner <felix.lechner@lease-up.com>
Newsgroups	linux.debian.ports.powerpc, linux.debian.project
Subject	Re: Delay slot in PowerISA?
Date	2026-03-29 23:10 +0200
Message-ID	<ME5yp-bfTb-3@gated-at.bofh.it> (permalink)
References	<McVZL-alXB-3@gated-at.bofh.it> <Md3ND-ar7z-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Hi Bastian

On Wed, Jan 14 2026, Bastian Blank wrote:

> No, PowerPC does not have any branch delay slots.

It doesn't, but a function call on PowerPC requires a nop instruction
after the branch instruction, which looks a lot like a delay slot. [1]

The extra space is needed to manage the "TOC" that's particular to the
PowerPC architecture.

> Why the [@#$%] do you consider it a good use of our time to chase
> ghosts?

I am sorry you were offended.  It was not a ghost to me.  I could not
think of a better place to ask than on -powerpc when porting my
software.

By the way, I did not notice until now that you copied debian-project on
your response (or that your response triggered the broader AI discussion
in the project in which I then participated).

My initial email to -powerpc unequivocally expressed skepticism about
the AI-generated materials, but I simply read everything that I thought
might help me to resolve an obscure linker error.

I never submitted an AI-generated contribution.  In fact, I have never
used an AI chatbot.

Thank you to Richard Lewis for interpreting my original message in a
friendly way.

Kind regards
Felix

P.S. I do not subscribe to either of the lists.

[1] https://sourceware.org/bugzilla/show_bug.cgi?id=26164

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Thread

Delay slot in PowerISA? Felix Lechner <felix.lechner@lease-up.com> - 2026-01-14 00:30 +0100
  Re: Delay slot in PowerISA? Trupti <trupti@linux.ibm.com> - 2026-01-14 08:00 +0100
  Re: Delay slot in PowerISA? Bastian Blank <waldi@debian.org> - 2026-01-14 08:50 +0100
    Re: Delay slot in PowerISA? Felix Lechner <felix.lechner@lease-up.com> - 2026-03-29 23:10 +0200
  Re: Delay slot in PowerISA? John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> - 2026-01-14 09:10 +0100

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