From: Richard Henderson <rth@twiddle.net>
To: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>,
David Gibson <david@gibson.dropbear.id.au>
Cc: qemu-ppc@nongnu.org, qemu-devel@nongnu.org,
aneesh.kumar@linux.vnet.ibm.com
Subject: Re: [Qemu-devel] [RFC 5/6] target-ppc: add modulo word operations
Date: Thu, 21 Jul 2016 11:54:39 +0530 [thread overview]
Message-ID: <e9238111-abe3-b540-1913-dc05b11fe2ba@twiddle.net> (raw)
In-Reply-To: <87fur7pm7e.fsf@abhimanyu.i-did-not-set--mail-host-address--so-tickle-me>
On 07/18/2016 10:38 AM, Nikunj A Dadhania wrote:
> David Gibson <david@gibson.dropbear.id.au> writes:
>
>> [ Unknown signature status ]
>> On Tue, Jul 12, 2016 at 11:33:21PM +0530, Nikunj A Dadhania wrote:
>>> Adding following instructions:
>>>
>>> moduw: Modulo Unsigned Word
>>> modsw: Modulo Signed Word
>>>
>>> Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
>>
>> Hrm.. any reason you're not using the TCG inbuilt remainder ops
>> (tcg_gen_rem_i32() etc.)?
>
> I have an updated version with me which uses inbuilt ops, i was searching
> for modulo expressions, which I didn't find, so wrote. Found later that
> it is called tcg_gen_rem. Will send in the next version.
It would probably be better to use helper functions for both div and mod,
because of the branches required.
C.f. target-arm/helper-a64.c, helper_sdiv64 et al.
r~
next prev parent reply other threads:[~2016-07-21 6:24 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-12 18:03 [Qemu-devel] [RFC 0/6] POWER9 TCG enablements - part1 Nikunj A Dadhania
2016-07-12 18:03 ` [Qemu-devel] [RFC 1/6] target-ppc: Introduce Power9 family Nikunj A Dadhania
2016-07-14 5:26 ` Bharata B Rao
2016-07-14 6:02 ` Nikunj A Dadhania
2016-07-18 1:48 ` David Gibson
2016-07-18 5:13 ` Nikunj A Dadhania
2016-07-12 18:03 ` [Qemu-devel] [RFC 2/6] target-ppc: Introduce POWER ISA 3.0 flag Nikunj A Dadhania
2016-07-18 1:49 ` David Gibson
2016-07-12 18:03 ` [Qemu-devel] [RFC 3/6] target-ppc: adding addpcis instruction Nikunj A Dadhania
2016-07-18 1:55 ` David Gibson
2016-07-21 5:59 ` Richard Henderson
2016-07-21 8:06 ` Nikunj A Dadhania
2016-07-12 18:03 ` [Qemu-devel] [RFC 4/6] target-ppc: add cmprb instruction Nikunj A Dadhania
2016-07-18 2:00 ` David Gibson
2016-07-21 6:17 ` Richard Henderson
2016-07-21 8:08 ` Nikunj A Dadhania
2016-08-02 7:02 ` Nikunj A Dadhania
2016-07-12 18:03 ` [Qemu-devel] [RFC 5/6] target-ppc: add modulo word operations Nikunj A Dadhania
2016-07-18 2:04 ` David Gibson
2016-07-18 5:08 ` Nikunj A Dadhania
2016-07-21 6:24 ` Richard Henderson [this message]
2016-07-21 8:11 ` Nikunj A Dadhania
2016-07-21 10:24 ` Richard Henderson
2016-07-12 18:03 ` [Qemu-devel] [RFC 6/6] target-ppc: add modulo dword operations Nikunj A Dadhania
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