From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([2001:4830:134:3::10]:60347)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <rth7680@gmail.com>) id 1bmVHM-0000pY-Ju
	for qemu-devel@nongnu.org; Tue, 20 Sep 2016 20:20:49 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <rth7680@gmail.com>) id 1bmVHH-0003Pm-IH
	for qemu-devel@nongnu.org; Tue, 20 Sep 2016 20:20:47 -0400
Received: from mail-yw0-x244.google.com ([2607:f8b0:4002:c05::244]:34947)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <rth7680@gmail.com>) id 1bmVHH-0003Pe-DL
	for qemu-devel@nongnu.org; Tue, 20 Sep 2016 20:20:43 -0400
Received: by mail-yw0-x244.google.com with SMTP id u82so1512482ywc.2
	for <qemu-devel@nongnu.org>; Tue, 20 Sep 2016 17:20:43 -0700 (PDT)
Sender: Richard Henderson <rth7680@gmail.com>
References: <1473373930-31547-1-git-send-email-mrolnik@gmail.com>
	<1473373930-31547-16-git-send-email-mrolnik@gmail.com>
From: Richard Henderson <rth@twiddle.net>
Message-ID: <9444ccf3-585a-48a3-99c3-f9b430f4e12c@twiddle.net>
Date: Tue, 20 Sep 2016 17:20:40 -0700
MIME-Version: 1.0
In-Reply-To: <1473373930-31547-16-git-send-email-mrolnik@gmail.com>
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 7bit
Subject: Re: [Qemu-devel] [PATCH RFC v1 15/29] target-arc: MUL64, MULU64,
 DIVAW
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel/>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Michael Rolnik <mrolnik@gmail.com>, qemu-devel@nongnu.org

On 09/08/2016 03:31 PM, Michael Rolnik wrote:
> Signed-off-by: Michael Rolnik <mrolnik@gmail.com>
> ---
>  target-arc/translate-inst.c | 105 ++++++++++++++++++++++++++++++++++++++++++++
>  target-arc/translate-inst.h |   4 ++
>  2 files changed, 109 insertions(+)
>
> diff --git a/target-arc/translate-inst.c b/target-arc/translate-inst.c
> index 92c75ac..c3795fe 100644
> --- a/target-arc/translate-inst.c
> +++ b/target-arc/translate-inst.c
> @@ -1546,3 +1546,108 @@ int arc_gen_MPYU(DisasCtxt *ctx, TCGv dest, TCGv src1, TCGv src2)
>      return BS_NONE;
>  }
>
> +/*
> +    DIVAW
> +*/
> +int arc_gen_DIVAW(DisasCtxt *ctx, TCGv dest, TCGv src1, TCGv src2)
> +{
> +    TCGLabel *label_else = gen_new_label();
> +    TCGLabel *label_done = gen_new_label();
> +    TCGv rslt = dest;
> +    TCGv temp = dest;
> +
> +    if (TCGV_EQUAL(dest, src1) || TCGV_EQUAL(dest, src2)) {
> +        rslt = tcg_temp_new_i32();
> +    }
> +
> +    /*
> +        if (src1 == 0)
> +            dest = 0
> +        else
> +        {
> +            src1_temp = src1 << 1
> +            if (src1_temp >= src2)
> +                dest = ((src1_temp - src2) | 0x0000_0001)
> +            else
> +                dest = src1_temp
> +        }
> +    */

Probably better with two movcond instead of branches.


r~