From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: peter.maydell@linaro.org, alex.bennee@linaro.org
Subject: [PATCH v3 0/2] accel/tcg: Improvements to atomic128.h
Date: Wed, 24 May 2023 11:32:56 -0700 [thread overview]
Message-ID: <20230524183258.1194571-1-richard.henderson@linaro.org> (raw)
Changes for v3:
* Most of the v2 patch set merged, except x86_64 atomic128-ldst.h,
which failed testing with clang-11 with debian 11.
* New patch to change __int128_t detection.
* This in turn enabled CONFIG_ATOMIC128, which was not ideal.
This clang bug/mis-feature of using a cmpxchg sequence for
implementing __atomic_load_n was already noted for aarch64,
so I should have expected it would also be true for x86_64.
Given that I am adding inline assembly for CPUINFO_ATOMIC_VMOVDQA
anyway, this isn't a big deal, but I did need to adjust the ifdefs.
r~
Richard Henderson (2):
meson: Split test for __int128_t type from __int128_t arithmetic
qemu/atomic128: Add x86_64 atomic128-ldst.h
meson.build | 15 +++--
host/include/x86_64/host/atomic128-ldst.h | 68 +++++++++++++++++++++++
include/qemu/int128.h | 4 +-
3 files changed, 80 insertions(+), 7 deletions(-)
create mode 100644 host/include/x86_64/host/atomic128-ldst.h
--
2.34.1
next reply other threads:[~2023-05-24 18:33 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-24 18:32 Richard Henderson [this message]
2023-05-24 18:32 ` [PATCH v3 1/2] meson: Split test for __int128_t type from __int128_t arithmetic Richard Henderson
2023-05-24 18:32 ` [PATCH v3 2/2] qemu/atomic128: Add x86_64 atomic128-ldst.h Richard Henderson
2023-05-26 0:24 ` [PATCH v3 0/2] accel/tcg: Improvements to atomic128.h Richard Henderson
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