Re: [PATCH 3/6] C-language equivalents of include/asm-*/bitops.h

• To: Edgar Toernig <[email protected]>
• Subject: Re: [PATCH 3/6] C-language equivalents of include/asm-*/bitops.h
• From: Richard Henderson <[email protected]>
• Date: Thu, 26 Jan 2006 09:30:14 -0800
• Cc: Akinobu Mita <[email protected]>, [email protected], Ivan Kokshaysky <[email protected]>, Ian Molton <[email protected]>, [email protected], David Howells <[email protected]>, Yoshinori Sato <[email protected]>, Linus Torvalds <[email protected]>, [email protected], Hirokazu Takata <[email protected]>, [email protected], Greg Ungerer <[email protected]>, [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], Miles Bader <[email protected]>, Andi Kleen <[email protected]>, Chris Zankel <[email protected]>
• In-reply-to: <[email protected]>
• Mail-followup-to: Edgar Toernig <[email protected]>, Akinobu Mita <[email protected]>, [email protected], Ivan Kokshaysky <[email protected]>, Ian Molton <[email protected]>, [email protected], David Howells <[email protected]>, Yoshinori Sato <[email protected]>, Linus Torvalds <[email protected]>, [email protected], Hirokazu Takata <[email protected]>, [email protected], Greg Ungerer <[email protected]>, [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], Miles Bader <[email protected]>, Andi Kleen <[email protected]>, Chris Zankel <[email protected]>
• References: <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]>
• Sender: [email protected]
• User-agent: Mutt/1.4.1i

On Thu, Jan 26, 2006 at 05:34:12AM +0100, Edgar Toernig wrote:
> Why shift at all?

Becuase that *is* a valid architecture tuning knob.  Most risc
machines can't AND with arbitrary constants like that, and loading
the constant might bulk things up more than just using the shift.


r~
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• References:
  • [PATCH 0/6] RFC: use include/asm-generic/bitops.h
    • From: [email protected] (Akinobu Mita)
  • [PATCH 3/6] C-language equivalents of include/asm-*/bitops.h
    • From: [email protected] (Akinobu Mita)
  • Re: [PATCH 3/6] C-language equivalents of include/asm-*/bitops.h
    • From: Russell King <[email protected]>
  • Re: [PATCH 3/6] C-language equivalents of include/asm-*/bitops.h
    • From: Richard Henderson <[email protected]>
  • Re: [PATCH 3/6] C-language equivalents of include/asm-*/bitops.h
    • From: Edgar Toernig <[email protected]>

• Prev by Date: Re: Problems with MSI-X on ia64
• Next by Date: Re: pthread_mutex_unlock (was Re: sched_yield() makes OpenLDAP slow)
• Previous by thread: Re: [PATCH 3/6] C-language equivalents of include/asm-*/bitops.h
• Next by thread: Re: [PATCH 3/6] C-language equivalents of include/asm-*/bitops.h
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]