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Re: toolchain/54428: GCC broken with std::atomic<__int128_t> with -mcx16
The following reply was made to PR toolchain/54428; it has been noted by GNATS.
From: Martin Husemann <martin%duskware.de@localhost>
Subject: Re: toolchain/54428: GCC broken with std::atomic<__int128_t> with
Date: Sun, 4 Aug 2019 08:02:32 +0200
On Fri, Aug 02, 2019 at 01:10:02PM +0000, Kamil Rytarowski wrote:
> Why to reject it? Relatively recent amd64 does support this operation
> natively in hardware.
Yeah, and once we switch our default compiler target cpu for amd64 to
something new enough we can have a __HAVE_ATOMIC_.... for it and enable
it on amd64. Or even enable it now depending on a define provided by the
compiler when targetting a new enough cpu.
But don't silently runtime-break default builds on devices still officially
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