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From: Richard Henderson <rth@twiddle.net>
To: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>,
	David Gibson <david@gibson.dropbear.id.au>
Cc: bharata@linux.vnet.ibm.com, qemu-ppc@nongnu.org, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH 5/6] target-ppc: support for 32-bit carry and overflow
Date: Sat, 18 Feb 2017 06:33:22 +1100	[thread overview]
Message-ID: <a89cd2f6-9d58-7ae4-9111-7069852f1337@twiddle.net> (raw)
In-Reply-To: <87y3x51l00.fsf@abhimanyu.i-did-not-set--mail-host-address--so-tickle-me>

On 02/17/2017 03:47 PM, Nikunj A Dadhania wrote:
>> Why do you want to extract these bits?
>
> Convinient to copy that to XER later.

Ideally you make the most common operation cheapest, and the more rare 
operation more expensive.  That said, I suppose even using ADDO is rare in the 
first place.  So it probably doesn't much matter.


r~

  reply	other threads:[~2017-02-17 19:33 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-09 10:33 [Qemu-devel] [PATCH 0/6] POWER9 TCG enablements - part15 Nikunj A Dadhania
2017-02-09 10:34 ` [Qemu-devel] [PATCH 1/6] target-ppc: generate exception for copy/paste Nikunj A Dadhania
2017-02-09 10:34 ` [Qemu-devel] [PATCH 2/6] target-ppc: add slbieg instruction Nikunj A Dadhania
2017-02-09 10:34 ` [Qemu-devel] [PATCH 3/6] target-ppc: add slbsync implementation Nikunj A Dadhania
2017-02-09 10:34 ` [Qemu-devel] [PATCH 4/6] target-ppc: add wait instruction Nikunj A Dadhania
2017-02-09 10:34 ` [Qemu-devel] [PATCH 5/6] target-ppc: support for 32-bit carry and overflow Nikunj A Dadhania
2017-02-10  0:10   ` David Gibson
2017-02-10  4:19     ` Nikunj A Dadhania
2017-02-13  1:54       ` David Gibson
2017-02-14  2:43       ` David Gibson
2017-02-14  3:05         ` Nikunj A Dadhania
2017-02-14  3:21           ` Richard Henderson
2017-02-16  5:08             ` Nikunj A Dadhania
2017-02-16 20:52               ` Richard Henderson
2017-02-17  4:47                 ` Nikunj A Dadhania
2017-02-17 19:33                   ` Richard Henderson [this message]
2017-02-09 10:34 ` [Qemu-devel] [PATCH 6/6] target-ppc: add mcrxrx instruction Nikunj A Dadhania
2017-02-10  0:28 ` [Qemu-devel] [PATCH 0/6] POWER9 TCG enablements - part15 David Gibson

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