From: "H. Peter Anvin" <hpa@zytor.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: mingo@elte.hu, tglx@linutronix.de, ak@linux.intel.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH, resend] x86-64: improve insn scheduling in SAVE_ARGS_IRQ
Date: Fri, 24 Feb 2012 12:21:59 -0800 [thread overview]
Message-ID: <4F47F167.6070203@zytor.com> (raw)
In-Reply-To: <4F4788A50200007800074A26@nat28.tlf.novell.com>
On 02/24/2012 03:55 AM, Jan Beulich wrote:
> leaq -RBP(%rsp),%rdi /* arg1 for handler */
> - testl $3, CS(%rdi)
> + testl $3, CS-RBP(%rsi)
> je 1f
IIRC there is no imm8 version of testl; could this be a testb instead or
is that going to cause stalls on some platforms you think?
-hpa
next prev parent reply other threads:[~2012-02-24 20:22 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-24 11:55 [PATCH, resend] x86-64: improve insn scheduling in SAVE_ARGS_IRQ Jan Beulich
2012-02-24 20:17 ` [tip:x86/asm] x86-64: Improve " tip-bot for Jan Beulich
2012-02-24 20:21 ` H. Peter Anvin [this message]
2012-02-27 8:11 ` [PATCH, resend] x86-64: improve " Jan Beulich
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