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[Bug target/85100] __builtin_cpu_supports avx does not verify OS supports it
- From: "hjl at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 29 Mar 2018 13:14:45 +0000
- Subject: [Bug target/85100] __builtin_cpu_supports avx does not verify OS supports it
- Auto-submitted: auto-generated
- References: <bug-85100-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85100
--- Comment #9 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Thu Mar 29 13:14:06 2018
New Revision: 258954
URL: https://gcc.gnu.org/viewcvs?rev=258954&root=gcc&view=rev
Log:
i386: Enable AVX/AVX512 features only if supported by OSXSAVE
Enable AVX and AVX512 features only if their states are supported by
OSXSAVE.
PR target/85100
* config/i386/cpuinfo.c (XCR_XFEATURE_ENABLED_MASK): New.
(XSTATE_FP): Likewise.
(XSTATE_SSE): Likewise.
(XSTATE_YMM): Likewise.
(XSTATE_OPMASK): Likewise.
(XSTATE_ZMM): Likewise.
(XSTATE_HI_ZMM): Likewise.
(XCR_AVX_ENABLED_MASK): Likewise.
(XCR_AVX512F_ENABLED_MASK): Likewise.
(get_available_features): Enable AVX and AVX512 features only
if their states are supported by OSXSAVE.
Modified:
trunk/libgcc/ChangeLog
trunk/libgcc/config/i386/cpuinfo.c