From: Andrew Pinski <pinskia@gmail.com>
To: GCC Patches <gcc-patches@gcc.gnu.org>
Subject: [PATCH/AARCH64] Fix -mcpu/arch=native support for LSE
Date: Fri, 11 Dec 2015 19:54:00 -0000 [thread overview]
Message-ID: <CA+=Sn1mZmRVLqf_5mHDQZUCX1r0HSiQh=HgLZAHfyXdZ2OBx4w@mail.gmail.com> (raw)
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Hi,
The Linux kernel calls lse as atomics in /proc/cpuinfo. We should
change aarch64-option-extensions.def to take that into account.
OK? Bootstrapped and tested on aarch64-linux-gnu with no regressions
and tested with -mcpu=native on ThunderX T88 pass 2 with Linux 4.4 to
see if lse gets enabled.
Thanks,
Andrew Pinski
ChangeLog:
* config/aarch64/aarch64-option-extensions.def (LSE): Change
FEAT_STRING to "atomics".
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Index: aarch64-option-extensions.def
===================================================================
--- aarch64-option-extensions.def (revision 231572)
+++ aarch64-option-extensions.def (working copy)
@@ -40,4 +40,4 @@ AARCH64_OPT_EXTENSION ("simd", AARCH64_F
AARCH64_FL_SIMD | AARCH64_FL_CRYPTO, "asimd")
AARCH64_OPT_EXTENSION("crypto", AARCH64_FL_CRYPTO | AARCH64_FL_FPSIMD, AARCH64_FL_CRYPTO, "aes pmull sha1 sha2")
AARCH64_OPT_EXTENSION("crc", AARCH64_FL_CRC, AARCH64_FL_CRC, "crc32")
-AARCH64_OPT_EXTENSION("lse", AARCH64_FL_LSE, AARCH64_FL_LSE, "lse")
+AARCH64_OPT_EXTENSION("lse", AARCH64_FL_LSE, AARCH64_FL_LSE, "atomics")
next reply other threads:[~2015-12-11 19:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-11 19:54 Andrew Pinski [this message]
2015-12-19 3:57 ` Andrew Pinski
2015-12-21 13:31 ` Richard Earnshaw (lists)
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