From 4581f8428e0e1d2f6787d0765823c7883bd2cfcd Mon Sep 17 00:00:00 2001 From: Oded Gabbay Date: Tue, 17 Nov 2015 16:16:46 +0200 Subject: [PATCH] llvmpipe: disable VSX in ppc due to LLVM PPC bug This patch disables the use of VSX instructions, as they cause some piglit tests to fail For more details, see: https://llvm.org/bugs/show_bug.cgi?id=25503#c7 With this patch, ppc64le reaches parity with x86-64 as far as piglit test suite is concerned. v2: - Added check that we have at least LLVM 3.4 - Added the LLVM bug URL as a comment in the code v3: - Only disable VSX if Altivec is supported, because if Altivec support is missing, then VSX support doesn't exist anyway. - Change original patch description. Signed-off-by: Oded Gabbay Cc: "11.0" Reviewed-by: Jose Fonseca Reviewed-by: Roland Scheidegger --- src/gallium/auxiliary/gallivm/lp_bld_misc.cpp | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp b/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp index 7bda118..3ee708f 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp +++ b/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp @@ -536,6 +536,15 @@ lp_build_create_jit_compiler_for_module(LLVMExecutionEngineRef *OutJIT, #if defined(PIPE_ARCH_PPC) MAttrs.push_back(util_cpu_caps.has_altivec ? "+altivec" : "-altivec"); +#if HAVE_LLVM >= 0x0304 + /* + * Make sure VSX instructions are disabled + * See LLVM bug https://llvm.org/bugs/show_bug.cgi?id=25503#c7 + */ + if (util_cpu_caps.has_altivec) { + MAttrs.push_back("-vsx"); + } +#endif #endif builder.setMAttrs(MAttrs); -- 2.7.4