From: irecca.kun@gmail.com
To: Arnd Bergmann <arnd@arndb.de>, Arnd Bergmann <arnd@kernel.org>,
linux-kernel@vger.kernel.org, x86@kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andy Shevchenko <andy@kernel.org>,
Matthew Wilcox <willy@infradead.org>
Subject: Re: [PATCH v2 05/11] x86: add CONFIG_X86_64_NATIVE option
Date: Wed, 11 Dec 2024 02:08:44 +0500 [thread overview]
Message-ID: <7ea06c6c-d1dd-4607-b0d8-fb60a9ce6f65@gmail.com> (raw)
In-Reply-To: <ea07afe0-c6c7-4641-9121-2dd591797852@app.fastmail.com>
On 12/11/24 01:56, Arnd Bergmann wrote:
> -ftree-vectorize is only enabled by default at -O3 level
You maybe missed it, but vectorization is enabled at -O2 level since GCC 12. https://www.phoronix.com/news/GCC-12-Auto-Vec-O2
Same goes for clang, it pretty much always had vectorized on -O2, iirc.
> avx2 is already turned off because of -mno-avx,
Hmm, I'm not sure. But if we look at existing KBUILD_RUSTFLAGS below, it has both -avx and -avx2.
next prev parent reply other threads:[~2024-12-10 21:08 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-10 14:49 [PATCH v2 00/11] x86: 32-bit cleanups Arnd Bergmann
2024-12-10 14:49 ` [PATCH v2 01/11] x86/Kconfig: Geode CPU has cmpxchg8b Arnd Bergmann
2024-12-10 16:00 ` Brian Gerst
2024-12-10 14:49 ` [PATCH v2 02/11] x86: drop 32-bit "bigsmp" machine support Arnd Bergmann
2024-12-10 14:49 ` [PATCH v2 03/11] x86: rework CONFIG_GENERIC_CPU compiler flags Arnd Bergmann
2024-12-10 14:49 ` [PATCH v2 04/11] x86: drop configuration options for early 64-bit CPUs Arnd Bergmann
2024-12-10 14:49 ` [PATCH v2 05/11] x86: add CONFIG_X86_64_NATIVE option Arnd Bergmann
2024-12-10 19:05 ` irecca.kun
2024-12-10 20:56 ` Arnd Bergmann
2024-12-10 21:08 ` irecca.kun [this message]
2024-12-10 21:02 ` Josh Triplett
2024-12-10 14:49 ` [PATCH v2 06/11] x86: remove HIGHMEM64G support Arnd Bergmann
2024-12-10 14:49 ` [PATCH v2 07/11] x86: drop SWIOTLB and PHYS_ADDR_T_64BIT for PAE Arnd Bergmann
2024-12-20 2:52 ` kernel test robot
2024-12-22 21:19 ` Arnd Bergmann
2024-12-10 14:49 ` [PATCH v2 08/11] x86: drop support for CONFIG_HIGHPTE Arnd Bergmann
2024-12-10 14:49 ` [PATCH v2 09/11] x86: document X86_INTEL_MID as 64-bit-only Arnd Bergmann
2024-12-10 14:49 ` [PATCH v2 10/11] x86: remove old STA2x11 support Arnd Bergmann
2024-12-10 15:39 ` Andy Shevchenko
2024-12-10 14:49 ` [PATCH v2 11/11] x86: Move platforms to Kconfig.platforms Arnd Bergmann
2024-12-10 15:43 ` [PATCH v2 00/11] x86: 32-bit cleanups Andy Shevchenko
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