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gallivm: guess CPU features also on ARM

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getHostCPUFeatures() is also available on ARM, for even longer time than
for x86. Use it -- it potentially enables instructions that may speed
things up.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Cc: <mesa-stable@lists.freedesktop.org>
Closes: https://gitlab.freedesktop.org/mesa/mesa/merge_requests/518
Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Lubomir Rintel 2019-03-11 19:16:40 +01:00 • committed by Matt Turner
parent 36478b9f77
commit bc6bfc861f
1 changed files with 6 additions and 7 deletions
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13
src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
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@ -556,11 +556,11 @@ lp_build_create_jit_compiler_for_module(LLVMExecutionEngineRef *OutJIT,
llvm::SmallVector<std::string, 16> MAttrs;
#if defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64)
#if HAVE_LLVM >= 0x0400
/* llvm-3.7+ implements sys::getHostCPUFeatures for x86,
* which allows us to enable/disable code generation based
* on the results of cpuid.
#if HAVE_LLVM >= 0x0400 && (defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64) || defined(PIPE_ARCH_ARM))
/* llvm-3.3+ implements sys::getHostCPUFeatures for Arm
* and llvm-3.7+ for x86, which allows us to enable/disable
* code generation based on the results of cpuid on these
* architectures.
*/
llvm::StringMap<bool> features;
llvm::sys::getHostCPUFeatures(features);
@ -570,7 +570,7 @@ lp_build_create_jit_compiler_for_module(LLVMExecutionEngineRef *OutJIT,
++f) {
MAttrs.push_back(((*f).second ? "+" : "-") + (*f).first().str());
}
#else
#elif defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64)
/*
* We need to unset attributes because sometimes LLVM mistakenly assumes
* certain features are present given the processor name.
@ -625,7 +625,6 @@ lp_build_create_jit_compiler_for_module(LLVMExecutionEngineRef *OutJIT,
MAttrs.push_back("-avx512vl");
#endif
#endif
#endif
#if defined(PIPE_ARCH_PPC)
MAttrs.push_back(util_cpu_caps.has_altivec ? "+altivec" : "-altivec");