From: Nicolas Pitre <nicolas.pitre@linaro.org>
To: Arnd Bergmann <arnd@arndb.de>
Cc: "Russell King - ARM Linux" <linux@arm.linux.org.uk>,
"Peter Maydell" <peter.maydell@linaro.org>,
"Måns Rullgård" <mans@mansr.com>,
"linux-arm-msm@vger.kernel.org" <linux-arm-msm@vger.kernel.org>,
"Stephen Boyd" <sboyd@codeaurora.org>,
"lkml - Kernel Mailing List" <linux-kernel@vger.kernel.org>,
"Steven Rostedt" <rostedt@goodmis.org>,
arm-mail-list <linux-arm-kernel@lists.infradead.org>
Subject: Re: [RFC/PATCH 0/3] ARM: Use udiv/sdiv for __aeabi_{u}idiv library functions
Date: Sun, 22 Nov 2015 21:36:45 -0500 (EST) [thread overview]
Message-ID: <alpine.LFD.2.20.1511222111020.22569@knanqh.ubzr> (raw)
In-Reply-To: <4527012.vmieWOaE32@wuerfel>
On Sun, 22 Nov 2015, Arnd Bergmann wrote:
> I've also found some /proc/cpuinfo output to cross-reference SoCs
> to their core names.
>
> variant part revision name features
> dove: 0 0x581 5 PJ4 idivt
I just managed to boot my dusty Dove DB and ran a quick test programon
it. Its cpuinfo corresponds to the above.
$ cat m.c
#include <stdio.h>
int mydiv(int, int);
int main()
{
printf("div test\n");
printf("%d\n", mydiv(12345678, 37));
return 0;
}
$ cat d.c
int mydiv(int x, int y)
{
return x/y;
}
$ gcc -o test m.c d.c
$ ./test
div test
333666
$ gcc -o test m.c d.c -march=armv7ve -mthumb
$ ./test
div test
333666
$ gcc -o test m.c d.c -march=armv7ve -marm
$ ./test
div test
Illegal instruction (core dumped)
$
Nicolas
WARNING: multiple messages have this Message-ID (diff)
From: nicolas.pitre@linaro.org (Nicolas Pitre)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC/PATCH 0/3] ARM: Use udiv/sdiv for __aeabi_{u}idiv library functions
Date: Sun, 22 Nov 2015 21:36:45 -0500 (EST) [thread overview]
Message-ID: <alpine.LFD.2.20.1511222111020.22569@knanqh.ubzr> (raw)
In-Reply-To: <4527012.vmieWOaE32@wuerfel>
On Sun, 22 Nov 2015, Arnd Bergmann wrote:
> I've also found some /proc/cpuinfo output to cross-reference SoCs
> to their core names.
>
> variant part revision name features
> dove: 0 0x581 5 PJ4 idivt
I just managed to boot my dusty Dove DB and ran a quick test programon
it. Its cpuinfo corresponds to the above.
$ cat m.c
#include <stdio.h>
int mydiv(int, int);
int main()
{
printf("div test\n");
printf("%d\n", mydiv(12345678, 37));
return 0;
}
$ cat d.c
int mydiv(int x, int y)
{
return x/y;
}
$ gcc -o test m.c d.c
$ ./test
div test
333666
$ gcc -o test m.c d.c -march=armv7ve -mthumb
$ ./test
div test
333666
$ gcc -o test m.c d.c -march=armv7ve -marm
$ ./test
div test
Illegal instruction (core dumped)
$
Nicolas
next prev parent reply other threads:[~2015-11-23 2:36 UTC|newest]
Thread overview: 125+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-21 1:23 [RFC/PATCH 0/3] ARM: Use udiv/sdiv for __aeabi_{u}idiv library functions Stephen Boyd
2015-11-21 1:23 ` Stephen Boyd
2015-11-21 1:23 ` [RFC/PATCH 1/3] scripts: Allow recordmcount to be used without tracing enabled Stephen Boyd
2015-11-21 1:23 ` Stephen Boyd
2015-11-21 1:23 ` [RFC/PATCH 2/3] recordmcount: Record locations of __aeabi_{u}idiv() calls on ARM Stephen Boyd
2015-11-21 1:23 ` Stephen Boyd
2015-11-21 10:13 ` Russell King - ARM Linux
2015-11-21 10:13 ` Russell King - ARM Linux
2015-11-23 20:53 ` Stephen Boyd
2015-11-23 20:53 ` Stephen Boyd
2015-11-23 20:58 ` Steven Rostedt
2015-11-23 20:58 ` Steven Rostedt
2015-11-23 21:03 ` Russell King - ARM Linux
2015-11-23 21:03 ` Russell King - ARM Linux
2015-11-23 21:16 ` Stephen Boyd
2015-11-23 21:16 ` Stephen Boyd
2015-11-23 21:33 ` Russell King - ARM Linux
2015-11-23 21:33 ` Russell King - ARM Linux
2015-11-24 1:04 ` Stephen Boyd
2015-11-24 1:04 ` Stephen Boyd
2015-11-21 1:23 ` [RFC/PATCH 3/3] ARM: Replace calls to __aeabi_{u}idiv with udiv/sdiv instructions Stephen Boyd
2015-11-21 1:23 ` Stephen Boyd
2015-11-21 11:50 ` Måns Rullgård
2015-11-21 11:50 ` Måns Rullgård
2015-11-23 20:49 ` Stephen Boyd
2015-11-23 20:49 ` Stephen Boyd
2015-11-23 20:54 ` Måns Rullgård
2015-11-23 20:54 ` Måns Rullgård
2015-11-23 21:16 ` Stephen Boyd
2015-11-23 21:16 ` Stephen Boyd
2015-11-21 20:39 ` [RFC/PATCH 0/3] ARM: Use udiv/sdiv for __aeabi_{u}idiv library functions Arnd Bergmann
2015-11-21 20:39 ` Arnd Bergmann
2015-11-21 20:45 ` Måns Rullgård
2015-11-21 20:45 ` Måns Rullgård
2015-11-21 21:00 ` Arnd Bergmann
2015-11-21 21:00 ` Arnd Bergmann
2015-11-21 22:11 ` Måns Rullgård
2015-11-21 22:11 ` Måns Rullgård
2015-11-21 23:14 ` Arnd Bergmann
2015-11-21 23:14 ` Arnd Bergmann
2015-11-21 23:21 ` Arnd Bergmann
2015-11-21 23:21 ` Arnd Bergmann
2015-11-22 13:29 ` Peter Maydell
2015-11-22 13:29 ` Peter Maydell
2015-11-22 19:25 ` Arnd Bergmann
2015-11-22 19:25 ` Arnd Bergmann
2015-11-22 19:30 ` Måns Rullgård
2015-11-22 19:30 ` Måns Rullgård
2015-11-22 19:30 ` Måns Rullgård
2015-11-22 19:47 ` Russell King - ARM Linux
2015-11-22 19:47 ` Russell King - ARM Linux
2015-11-22 19:58 ` Arnd Bergmann
2015-11-22 19:58 ` Arnd Bergmann
2015-11-22 20:03 ` Russell King - ARM Linux
2015-11-22 20:03 ` Russell King - ARM Linux
2015-11-22 20:37 ` Arnd Bergmann
2015-11-22 20:37 ` Arnd Bergmann
2015-11-22 20:39 ` Måns Rullgård
2015-11-22 20:39 ` Måns Rullgård
2015-11-22 20:39 ` Måns Rullgård
2015-11-22 21:18 ` Arnd Bergmann
2015-11-22 21:18 ` Arnd Bergmann
2015-11-23 2:36 ` Nicolas Pitre [this message]
2015-11-23 2:36 ` Nicolas Pitre
2015-11-23 8:15 ` Arnd Bergmann
2015-11-23 8:15 ` Arnd Bergmann
2015-11-23 14:14 ` Christopher Covington
2015-11-23 14:14 ` Christopher Covington
2015-11-23 15:32 ` Arnd Bergmann
2015-11-23 15:32 ` Arnd Bergmann
2015-11-23 20:38 ` Stephen Boyd
2015-11-23 20:38 ` Stephen Boyd
2015-11-23 21:19 ` Arnd Bergmann
2015-11-23 21:19 ` Arnd Bergmann
2015-11-23 21:32 ` Stephen Boyd
2015-11-23 21:32 ` Stephen Boyd
2015-11-23 21:57 ` Arnd Bergmann
2015-11-23 21:57 ` Arnd Bergmann
2015-11-23 23:13 ` Stephen Boyd
2015-11-23 23:13 ` Stephen Boyd
2015-11-24 10:17 ` Arnd Bergmann
2015-11-24 10:17 ` Arnd Bergmann
2015-11-24 12:15 ` Måns Rullgård
2015-11-24 12:15 ` Måns Rullgård
2015-11-24 12:15 ` Måns Rullgård
2015-11-24 13:45 ` Arnd Bergmann
2015-11-24 13:45 ` Arnd Bergmann
2015-11-25 1:51 ` Stephen Boyd
2015-11-25 1:51 ` Stephen Boyd
2015-11-25 7:21 ` Arnd Bergmann
2015-11-25 7:21 ` Arnd Bergmann
2015-11-24 0:13 ` Stephen Boyd
2015-11-24 0:13 ` Stephen Boyd
2015-11-24 8:53 ` Stephen Boyd
2015-11-24 8:53 ` Stephen Boyd
2015-11-24 10:38 ` Arnd Bergmann
2015-11-24 10:38 ` Arnd Bergmann
2015-11-24 10:42 ` Russell King - ARM Linux
2015-11-24 10:42 ` Russell King - ARM Linux
2015-11-24 10:42 ` Russell King - ARM Linux
2015-11-24 12:10 ` Måns Rullgård
2015-11-24 12:10 ` Måns Rullgård
2015-11-24 12:10 ` Måns Rullgård
2015-11-24 12:23 ` Russell King - ARM Linux
2015-11-24 12:23 ` Russell King - ARM Linux
2015-11-24 12:29 ` Måns Rullgård
2015-11-24 12:29 ` Måns Rullgård
2015-11-24 12:29 ` Måns Rullgård
2015-11-24 14:00 ` Russell King - ARM Linux
2015-11-24 14:00 ` Russell King - ARM Linux
2015-11-24 14:03 ` Måns Rullgård
2015-11-24 14:03 ` Måns Rullgård
2015-11-24 14:03 ` Måns Rullgård
2015-11-24 10:39 ` Russell King - ARM Linux
2015-11-24 10:39 ` Russell King - ARM Linux
2015-11-24 20:07 ` Stephen Boyd
2015-11-24 20:07 ` Stephen Boyd
2015-11-24 20:35 ` Russell King - ARM Linux
2015-11-24 20:35 ` Russell King - ARM Linux
2015-11-24 21:11 ` Arnd Bergmann
2015-11-24 21:11 ` Arnd Bergmann
2016-01-13 1:51 ` Stephen Boyd
2016-01-13 1:51 ` Stephen Boyd
2015-11-24 10:37 ` Russell King - ARM Linux
2015-11-24 10:37 ` Russell King - ARM Linux
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=alpine.LFD.2.20.1511222111020.22569@knanqh.ubzr \
--to=nicolas.pitre@linaro.org \
--cc=arnd@arndb.de \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@arm.linux.org.uk \
--cc=mans@mansr.com \
--cc=peter.maydell@linaro.org \
--cc=rostedt@goodmis.org \
--cc=sboyd@codeaurora.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.