From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <ffmpeg-devel-bounces@ffmpeg.org>
Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org [79.124.17.100])
	by master.gitmailbox.com (Postfix) with ESMTP id 0284E4778B
	for <ffmpegdev@gitmailbox.com>; Fri, 22 Dec 2023 09:49:48 +0000 (UTC)
Received: from [127.0.1.1] (localhost [127.0.0.1])
	by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 35FD168D2A6;
	Fri, 22 Dec 2023 11:49:47 +0200 (EET)
Received: from mail8.parnet.fi (mail8.parnet.fi [77.234.108.134])
 by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 0C7E968D29F
 for <ffmpeg-devel@ffmpeg.org>; Fri, 22 Dec 2023 11:49:40 +0200 (EET)
Received: from mail9.parnet.fi (mail9.parnet.fi [77.234.108.21])
 by mail8.parnet.fi  with ESMTP id 3BM9ne9p020337-3BM9ne9q020337
 for <ffmpeg-devel@ffmpeg.org>; Fri, 22 Dec 2023 11:49:40 +0200
Received: from foo.martin.st (host-97-144.parnet.fi [77.234.97.144])
 by mail9.parnet.fi (Postfix) with ESMTPS id 68483A146B
 for <ffmpeg-devel@ffmpeg.org>; Fri, 22 Dec 2023 11:49:40 +0200 (EET)
Date: Fri, 22 Dec 2023 11:49:39 +0200 (EET)
From: =?ISO-8859-15?Q?Martin_Storsj=F6?= <martin@martin.st>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
In-Reply-To: <CAEa-L+vamksy3_ndECce4Fv=cBC11doiL=vaTCDXKfSOXazWRg@mail.gmail.com>
Message-ID: <27cca083-9783-67cc-b81f-b29b2b1c3a5d@martin.st>
References: <CAEa-L+vamksy3_ndECce4Fv=cBC11doiL=vaTCDXKfSOXazWRg@mail.gmail.com>
MIME-Version: 1.0
X-FE-Policy-ID: 3:14:2:SYSTEM
Subject: Re: [FFmpeg-devel] [PATCH 3/6] checkasm/takdsp: add decorrelate_sm
 test
X-BeenThere: ffmpeg-devel@ffmpeg.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: FFmpeg development discussions and patches <ffmpeg-devel.ffmpeg.org>
List-Unsubscribe: <https://ffmpeg.org/mailman/options/ffmpeg-devel>,
 <mailto:ffmpeg-devel-request@ffmpeg.org?subject=unsubscribe>
List-Archive: <https://ffmpeg.org/pipermail/ffmpeg-devel>
List-Post: <mailto:ffmpeg-devel@ffmpeg.org>
List-Help: <mailto:ffmpeg-devel-request@ffmpeg.org?subject=help>
List-Subscribe: <https://ffmpeg.org/mailman/listinfo/ffmpeg-devel>,
 <mailto:ffmpeg-devel-request@ffmpeg.org?subject=subscribe>
Reply-To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Content-Transfer-Encoding: 7bit
Content-Type: text/plain; charset="us-ascii"; Format="flowed"
Errors-To: ffmpeg-devel-bounces@ffmpeg.org
Sender: "ffmpeg-devel" <ffmpeg-devel-bounces@ffmpeg.org>
Archived-At: <https://master.gitmailbox.com/ffmpegdev/27cca083-9783-67cc-b81f-b29b2b1c3a5d@martin.st/>
List-Archive: <https://master.gitmailbox.com/ffmpegdev/>
List-Post: <mailto:ffmpegdev@gitmailbox.com>

On Mon, 18 Dec 2023, flow gg wrote:

>

> +static void test_decorrelate_sm(TAKDSPContext *s) {
> +#define BUF_SIZE 1024
> +    declare_func(void, int32_t *, int32_t *, int);
> +
> +    if (check_func(s->decorrelate_sm, "decorrelate_sm")) {
> +        LOCAL_ALIGNED_32(int32_t, p1, [BUF_SIZE]);
> +        LOCAL_ALIGNED_32(int32_t, p1_2, [BUF_SIZE]);
> +        LOCAL_ALIGNED_32(int32_t, p2, [BUF_SIZE]);
> +        LOCAL_ALIGNED_32(int32_t, p2_2, [BUF_SIZE]);
> +
> +        randomize(p1, BUF_SIZE);
> +        memcpy(p1, p1_2, BUF_SIZE);

p1 is the one that is filled with initialized data here, not the other way 
around. Clang optimizes out this memcpy since it's copying uninitialized 
data.

> +        randomize(p2, BUF_SIZE);
> +        memcpy(p2_2, p2, BUF_SIZE);
> +
> +        call_ref(p1, p2, BUF_SIZE);
> +        call_new(p1_2, p2_2, BUF_SIZE);
> +
> +        if (memcmp(p2, p2_2, BUF_SIZE) != 0){

As this function mutates both p1 and p2, we need to check both of them. 
Also *sizeof().

// Martin

_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-devel

To unsubscribe, visit link above, or email
ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".