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Re: [Qemu-devel] [FreeBSD] Host build i386 failing to build aarch64 targ

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [FreeBSD] Host build i386 failing to build aarch64 targets
Date: Mon, 21 Mar 2016 10:06:37 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0

On 20/03/2016 20:20, Sean Bruno wrote:
> aarch64 targets are now failing to build on i386 hosts due to missing
> __atomic_load_8() calls since this commit:
> https://github.com/qemu/qemu/commit/a0aa44b488b3601415d55041e4619aef5f3a4ba8#diff-c143d686899ae51d7b927d9c682e12fd
> I'm unsure if Linux is disabling aarch64 targets for i386 hosts or if
> this commit works "just fine" on Linux hosts right now, as it doesn't
> work with clang or gcc.

Where is the relevant load in QEMU code?

x86 can actually do 64-bit atomic loads and stores through the FPU, but
I'm not sure about other 32-bit targets?


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