File U_gallivm-disable-avx512-features.patch of Package Mesa.5370

Overview Repositories Revisions Requests Users Attributes Meta

File U_gallivm-disable-avx512-features.patch of Package Mesa.5370

From: Roland Scheidegger <sroland@vmware.com>
Date: Sun May 8 00:40:07 2016 +0200
Subject: [PATCH]gallivm: disable avx512 features
Patch-mainline: Upstream
Git-repo: git://anongit.freedesktop.org/git/mesa/mesa
Git-commit: 8b66e2647d5e36e318177a460e6e586d6ca8c36b
References: bsc#980557
Signed-off-by: Egbert Eich <eich@suse.com>

We don't target this yet, and some llvm versions incorrectly enable it based
on cpu string, causing crashes.
(Albeit this is a losing battle, it is pretty much guaranteed when the next
new feature comes along llvm will mistakenly enable it on some future cpu,
thus we would have to proactively disable all new features as llvm adds them.)

This should fix https://bugs.freedesktop.org/show_bug.cgi?id=94291 (untested)

Tested-by: Timo Aaltonen <tjaalton@ubuntu.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com

CC: <mesa-stable@lists.freedesktop.org>
---
 src/gallium/auxiliary/gallivm/lp_bld_misc.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp b/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
index bb08892..42a53ec 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
+++ b/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
@@ -571,6 +571,18 @@ lp_build_create_jit_compiler_for_module(LLVMExecutionEngineRef *OutJIT,
    MAttrs.push_back(util_cpu_caps.has_avx  ? "+avx"  : "-avx");
    MAttrs.push_back(util_cpu_caps.has_f16c ? "+f16c" : "-f16c");
    MAttrs.push_back(util_cpu_caps.has_avx2 ? "+avx2" : "-avx2");
+   /* disable avx512 and all subvariants */
+#if HAVE_LLVM >= 0x0304
+   MAttrs.push_back("-avx512cd");
+   MAttrs.push_back("-avx512er");
+   MAttrs.push_back("-avx512f");
+   MAttrs.push_back("-avx512pf");
+#endif
+#if HAVE_LLVM >= 0x0305
+   MAttrs.push_back("-avx512bw");
+   MAttrs.push_back("-avx512dq");
+   MAttrs.push_back("-avx512vl");
+#endif
 #endif
 
 #if defined(PIPE_ARCH_PPC)

Places

File U_gallivm-disable-avx512-features.patch of Package Mesa.5370

Places