49 lines
1.9 KiB
Diff
49 lines
1.9 KiB
Diff
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From: Roland Scheidegger <sroland@vmware.com>
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Date: Sun May 8 00:40:07 2016 +0200
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Subject: [PATCH]gallivm: disable avx512 features
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Patch-mainline: Upstream
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Git-repo: git://anongit.freedesktop.org/git/mesa/mesa
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Git-commit: 8b66e2647d5e36e318177a460e6e586d6ca8c36b
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References: bsc#980557
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Signed-off-by: Egbert Eich <eich@suse.com>
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We don't target this yet, and some llvm versions incorrectly enable it based
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on cpu string, causing crashes.
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(Albeit this is a losing battle, it is pretty much guaranteed when the next
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new feature comes along llvm will mistakenly enable it on some future cpu,
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thus we would have to proactively disable all new features as llvm adds them.)
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This should fix https://bugs.freedesktop.org/show_bug.cgi?id=94291 (untested)
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Tested-by: Timo Aaltonen <tjaalton@ubuntu.com>
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Reviewed-by: Jose Fonseca <jfonseca@vmware.com
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CC: <mesa-stable@lists.freedesktop.org>
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---
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src/gallium/auxiliary/gallivm/lp_bld_misc.cpp | 12 ++++++++++++
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1 file changed, 12 insertions(+)
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diff --git a/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp b/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
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index bb08892..42a53ec 100644
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--- a/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
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+++ b/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
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@@ -571,6 +571,18 @@ lp_build_create_jit_compiler_for_module(LLVMExecutionEngineRef *OutJIT,
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MAttrs.push_back(util_cpu_caps.has_avx ? "+avx" : "-avx");
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MAttrs.push_back(util_cpu_caps.has_f16c ? "+f16c" : "-f16c");
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MAttrs.push_back(util_cpu_caps.has_avx2 ? "+avx2" : "-avx2");
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+ /* disable avx512 and all subvariants */
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+#if HAVE_LLVM >= 0x0304
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+ MAttrs.push_back("-avx512cd");
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+ MAttrs.push_back("-avx512er");
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+ MAttrs.push_back("-avx512f");
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+ MAttrs.push_back("-avx512pf");
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+#endif
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+#if HAVE_LLVM >= 0x0305
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+ MAttrs.push_back("-avx512bw");
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+ MAttrs.push_back("-avx512dq");
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+ MAttrs.push_back("-avx512vl");
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+#endif
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#endif
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#if defined(PIPE_ARCH_PPC)
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