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From: Guillermo Rodriguez Garcia <guille.rodriguez@gmail.com>
To: "ptxdist@pengutronix.de" <ptxdist@pengutronix.de>
Subject: Re: [ptxdist] OSELAS Toolchain for ARM Cortex A5
Date: Thu, 16 Jul 2015 15:36:41 +0200	[thread overview]
Message-ID: <CABDcavYsSLAiUodn7t4LoHZnnGxiaJpj9Mhd1q9Zr7d1TQuR4w@mail.gmail.com> (raw)
In-Reply-To: <20150716133024.GB27933@pengutronix.de>

Hi Michael,

2015-07-16 15:30 GMT+02:00 Michael Olbrich <m.olbrich@pengutronix.de>:
> In the cortex-a8 toolchains we have 'cortex-strings'. These are string
> funtions that use NEON instructions unconditionally and are (in the version
> we use here) optimized for cortex-a8.

Uhm. So I guess that the toolchain I am using (arm-v7a-linux-gnueabihf
from OSELAS.Toolchain-2013.12.2) shouldn't actually work. For some
reason I haven't seen any problem yet.

>
> A newer version of these functions reached mainline in gcc-4.9. There are
> optimized for cortex-a9. Also, NEON support is detected at runtime and
> approriate versions of the functions are selected. This is what we use in
> the arm-v7a-linux-gnueabihf toolchain since OSELAS.Toolchain-2014.12.0.

However I just peeked at OSELAS.Toolchain-2014.12.1 and there is no
trace of cortex-strings in
arm-v7a-linux-gnueabihf_gcc-4.9.2_glibc-2.20_binutils-2.24_kernel-3.16-sanitized.ptxconfig
(PTXCONF_GLIBC_EXTRA_ADDONS is empty). Am I looking in the wrong place
?

Thanks,

Guillermo

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  reply	other threads:[~2015-07-16 11:37 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-07-13 14:39 Guillermo Rodriguez Garcia
2015-07-13 15:22 ` Jean-Claude Monnin
2015-07-13 15:34   ` Guillermo Rodriguez Garcia
2015-07-16 11:43     ` Guillermo Rodriguez Garcia
2015-07-16 13:14       ` Jean-Claude Monnin
2015-07-16 13:27         ` Guillermo Rodriguez Garcia
2015-07-16 13:37           ` Michael Olbrich
2015-07-16 14:48             ` Guillermo Rodriguez Garcia
2015-07-16 13:30         ` Michael Olbrich
2015-07-16 13:36           ` Guillermo Rodriguez Garcia [this message]
2015-07-16 13:39             ` Michael Olbrich

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