From: Peter Zijlstra <peterz@infradead.org>
To: Vladimir Makarov <vmakarov@redhat.com>
Cc: Jakub Jelinek <jakub@redhat.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Richard Henderson <rth@redhat.com>,
Ingo Molnar <mingo@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Borislav Petkov <bp@alien8.de>
Subject: Re: [PATCH] x86: Optimize variable_test_bit()
Date: Sat, 2 May 2015 14:43:34 +0200 [thread overview]
Message-ID: <20150502124334.GL5029@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <5543CDC0.6010206@redhat.com>
On Fri, May 01, 2015 at 03:02:24PM -0400, Vladimir Makarov wrote:
> Currently LRA is used by x86/x86-64, ARM, AARCH64, s390, and MIPS.
> PPC, SH, and ARC are moving to LRA. All other targets are still
> reload based.
>
> So I could implement the output reloads in LRA, probably for the
> next GCC release. How to enable and mostly use it for multi-target
> code like the kernel is another question.
Pretty much all inline asm is in per arch code; so one arch having
different asm features than another should not be a problem at all.
next prev parent reply other threads:[~2015-05-02 12:43 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-01 15:16 [PATCH] x86: Optimize variable_test_bit() Peter Zijlstra
2015-05-01 16:03 ` Linus Torvalds
2015-05-01 16:16 ` Peter Zijlstra
2015-05-01 16:29 ` Peter Zijlstra
2015-05-01 16:18 ` Peter Zijlstra
2015-05-01 16:33 ` Jakub Jelinek
2015-05-01 16:45 ` Linus Torvalds
2015-05-01 16:46 ` Peter Zijlstra
2015-05-01 17:17 ` Ingo Molnar
2015-05-01 19:02 ` Vladimir Makarov
2015-05-01 20:49 ` Linus Torvalds
2015-05-01 22:22 ` Vladimir Makarov
2015-05-02 12:39 ` Peter Zijlstra
2015-05-04 15:37 ` Richard Henderson
2015-05-04 19:33 ` [RFC] Design for flag bit outputs from asms Richard Henderson
2015-05-04 20:14 ` H. Peter Anvin
2015-05-04 20:27 ` H. Peter Anvin
2015-05-04 20:33 ` Richard Henderson
2015-05-04 20:45 ` Linus Torvalds
2015-05-04 20:57 ` Richard Henderson
2015-05-04 21:23 ` H. Peter Anvin
2015-05-04 20:35 ` Linus Torvalds
2015-05-04 20:42 ` H. Peter Anvin
2015-05-05 9:01 ` Gabriel Paubert
2015-05-05 13:50 ` Segher Boessenkool
2015-05-05 15:37 ` Linus Torvalds
2015-05-05 16:10 ` Segher Boessenkool
2015-05-02 12:43 ` Peter Zijlstra [this message]
2015-05-04 18:07 ` [PATCH] x86: Optimize variable_test_bit() Vladimir Makarov
2015-05-04 20:14 ` H. Peter Anvin
2015-05-04 13:42 ` Peter Zijlstra
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