From: Simon Glass <sjg@chromium.org>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] arm: arm64: only use general regs
Date: Mon, 27 Nov 2017 22:00:27 -0700 [thread overview]
Message-ID: <CAPnjgZ07Gda+FQYAbyo-M+bwBAi8htLPwvJcrhvDkd+NVqSUiQ@mail.gmail.com> (raw)
In-Reply-To: <20171128020937.27906-1-peng.fan@nxp.com>
On 27 November 2017 at 19:09, Peng Fan <peng.fan@nxp.com> wrote:
> When compiling with android toolchain, there is an instruction
> "str q0, [x8],#16", but x8 is not 16bytes aligned,
> this instruction will trigger sync abort.
>
> So, following Linux kernel, only use general regs for arm64.
> If not, compiler may use simd registers Q[x]. We need to avoid
> using simd registers in U-Boot, because load/store Q[x] has
> restriction that 128bits aligned when str/ldr.
>
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
> arch/arm/Makefile | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Reviewed-by: Simon Glass <sjg@chromium.org>
next prev parent reply other threads:[~2017-11-28 5:00 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-28 2:09 [U-Boot] [PATCH] arm: arm64: only use general regs Peng Fan
2017-11-28 5:00 ` Simon Glass [this message]
2017-12-01 21:46 ` Alexander Graf
2017-12-07 7:25 ` Peng Fan
2017-12-07 13:56 ` Alexander Graf
2017-12-03 4:02 ` [U-Boot] " Tom Rini
2017-12-03 10:37 ` Peng Fan
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